var util = require('util'),
    f = util.format,
    EventEmitter = require('events').EventEmitter,
    path = require('path'),
    uuid = require('uuid'),
    fork = require('child_process').fork,
    pbxWriter = require('./pbxWriter'),
    pbxFile = require('./pbxFile'),
    fs = require('fs'),
    parser = require('./parser/pbxproj'),
    plist = require('simple-plist'),
    COMMENT_KEY = /_comment$/

function pbxProject(filename) {
    if (!(this instanceof pbxProject))
        return new pbxProject(filename);

    this.filepath = path.resolve(filename)
}

util.inherits(pbxProject, EventEmitter)

pbxProject.prototype.parse = function(cb) {
    var worker = fork(__dirname + '/parseJob.js', [this.filepath])

    worker.on('message', function(msg) {
        if (msg.name == 'SyntaxError' || msg.code) {
            this.emit('error', msg);
        } else {
            this.hash = msg;
            this.emit('end', null, msg)
        }
    }.bind(this));

    if (cb) {
        this.on('error', cb);
        this.on('end', cb);
    }

    return this;
}

pbxProject.prototype.parseSync = function() {
    var file_contents = fs.readFileSync(this.filepath, 'utf-8');

    this.hash = parser.parse(file_contents);
    return this;
}

pbxProject.prototype.writeSync = function() {
    this.writer = new pbxWriter(this.hash);
    return this.writer.writeSync();
}

pbxProject.prototype.allUuids = function() {
    var sections = this.hash.project.objects,
        uuids = [],
        section;

    for (key in sections) {
        section = sections[key]
        uuids = uuids.concat(Object.keys(section))
    }

    uuids = uuids.filter(function(str) {
        return !COMMENT_KEY.test(str) && str.length == 24;
    });

    return uuids;
}

pbxProject.prototype.generateUuid = function() {
    var id = uuid.v4()
        .replace(/-/g, '')
        .substr(0, 24)
        .toUpperCase()

    if (this.allUuids().indexOf(id) >= 0) {
        return this.generateUuid();
    } else {
        return id;
    }
}

pbxProject.prototype.addPluginFile = function(path, opt) {
    var file = new pbxFile(path, opt);

    file.plugin = true; // durr
    correctForPluginsPath(file, this);

    // null is better for early errors
    if (this.hasFile(file.path)) return null;

    file.fileRef = this.generateUuid();

    this.addToPbxFileReferenceSection(file);    // PBXFileReference
    this.addToPluginsPbxGroup(file);            // PBXGroup

    return file;
}

pbxProject.prototype.removePluginFile = function(path, opt) {
    var file = new pbxFile(path, opt);
    correctForPluginsPath(file, this);

    this.removeFromPbxFileReferenceSection(file);    // PBXFileReference
    this.removeFromPluginsPbxGroup(file);            // PBXGroup

    return file;
}

pbxProject.prototype.addProductFile = function(targetPath, opt) {
    var file = new pbxFile(targetPath, opt);

    file.includeInIndex = 0;
    file.fileRef = this.generateUuid();
    file.target = opt ? opt.target : undefined;
    file.group = opt ? opt.group : undefined;
    file.uuid = this.generateUuid();
    file.path = file.basename;

    this.addToPbxFileReferenceSection(file);
    this.addToProductsPbxGroup(file);                // PBXGroup

    return file;
}

pbxProject.prototype.removeProductFile = function(path, opt) {
    var file = new pbxFile(path, opt);

    this.removeFromProductsPbxGroup(file);           // PBXGroup

    return file;
}

/**
 *
 * @param path {String}
 * @param opt {Object} see pbxFile for avail options
 * @param group {String} group key
 * @returns {Object} file; see pbxFile
 */
pbxProject.prototype.addSourceFile = function (path, opt, group) {
    var file;
    if (group) {
        file = this.addFile(path, group, opt);
    }
    else {
        file = this.addPluginFile(path, opt);
    }

    if (!file) return false;

    file.target = opt ? opt.target : undefined;
    file.uuid = this.generateUuid();

    this.addToPbxBuildFileSection(file);        // PBXBuildFile
    this.addToPbxSourcesBuildPhase(file);       // PBXSourcesBuildPhase

    return file;
}

/**
 *
 * @param path {String}
 * @param opt {Object} see pbxFile for avail options
 * @param group {String} group key
 * @returns {Object} file; see pbxFile
 */
pbxProject.prototype.removeSourceFile = function (path, opt, group) {
    var file;
    if (group) {
        file = this.removeFile(path, group, opt);
    }
    else {
        file = this.removePluginFile(path, opt);
    }
    file.target = opt ? opt.target : undefined;
    this.removeFromPbxBuildFileSection(file);        // PBXBuildFile
    this.removeFromPbxSourcesBuildPhase(file);       // PBXSourcesBuildPhase

    return file;
}

/**
 *
 * @param path {String}
 * @param opt {Object} see pbxFile for avail options
 * @param group {String} group key
 * @returns {Object} file; see pbxFile
 */
pbxProject.prototype.addHeaderFile = function (path, opt, group) {
    if (group) {
        return this.addFile(path, group, opt);
    }
    else {
        return this.addPluginFile(path, opt);
    }
}

/**
 *
 * @param path {String}
 * @param opt {Object} see pbxFile for avail options
 * @param group {String} group key
 * @returns {Object} file; see pbxFile
 */
pbxProject.prototype.removeHeaderFile = function (path, opt, group) {
    if (group) {
        return this.removeFile(path, group, opt);
    }
    else {
        return this.removePluginFile(path, opt);
    }
}

/**
 *
 * @param path {String}
 * @param opt {Object} see pbxFile for avail options
 * @param group {String} group key
 * @returns {Object} file; see pbxFile
 */
pbxProject.prototype.addResourceFile = function(path, opt, group) {
    opt = opt || {};

    var file;

    if (opt.plugin) {
        file = this.addPluginFile(path, opt);
        if (!file) return false;
    } else {
        file = new pbxFile(path, opt);
        if (this.hasFile(file.path)) return false;
    }

    file.uuid = this.generateUuid();
    file.target = opt ? opt.target : undefined;

    if (!opt.plugin) {
        correctForResourcesPath(file, this);
        file.fileRef = this.generateUuid();
    }

    if (!opt.variantGroup) {
        this.addToPbxBuildFileSection(file);        // PBXBuildFile
        this.addToPbxResourcesBuildPhase(file);     // PBXResourcesBuildPhase
    }

    if (!opt.plugin) {
        this.addToPbxFileReferenceSection(file);    // PBXFileReference
        if (group) {
            if (this.getPBXGroupByKey(group)) {
                this.addToPbxGroup(file, group);        //Group other than Resources (i.e. 'splash')
            }
            else if (this.getPBXVariantGroupByKey(group)) {
                this.addToPbxVariantGroup(file, group);  // PBXVariantGroup
            }
        }
        else {
            this.addToResourcesPbxGroup(file);          // PBXGroup
        }

    }

    return file;
}

/**
 *
 * @param path {String}
 * @param opt {Object} see pbxFile for avail options
 * @param group {String} group key
 * @returns {Object} file; see pbxFile
 */
pbxProject.prototype.removeResourceFile = function(path, opt, group) {
    var file = new pbxFile(path, opt);
    file.target = opt ? opt.target : undefined;

    correctForResourcesPath(file, this);

    this.removeFromPbxBuildFileSection(file);        // PBXBuildFile
    this.removeFromPbxFileReferenceSection(file);    // PBXFileReference
    if (group) {
        if (this.getPBXGroupByKey(group)) {
            this.removeFromPbxGroup(file, group);        //Group other than Resources (i.e. 'splash')
        }
        else if (this.getPBXVariantGroupByKey(group)) {
            this.removeFromPbxVariantGroup(file, group);  // PBXVariantGroup
        }
    }
    else {
        this.removeFromResourcesPbxGroup(file);          // PBXGroup
    }
    this.removeFromPbxResourcesBuildPhase(file);     // PBXResourcesBuildPhase

    return file;
}

pbxProject.prototype.addFramework = function(fpath, opt) {
    var customFramework = opt && opt.customFramework == true;
    var link = !opt || (opt.link == undefined || opt.link);    //defaults to true if not specified
    var embed = opt && opt.embed;                              //defaults to false if not specified

    if (opt) {
      delete opt.embed;
    }

    var file = new pbxFile(fpath, opt);

    file.uuid = this.generateUuid();
    file.fileRef = this.generateUuid();
    file.target = opt ? opt.target : undefined;

    if (this.hasFile(file.path)) return false;

    this.addToPbxBuildFileSection(file);        // PBXBuildFile
    this.addToPbxFileReferenceSection(file);    // PBXFileReference
    this.addToFrameworksPbxGroup(file);         // PBXGroup

    if (link) {
      this.addToPbxFrameworksBuildPhase(file);    // PBXFrameworksBuildPhase
    }

    if (customFramework) {
        this.addToFrameworkSearchPaths(file);

        if (embed) {
          opt.embed = embed;
          var embeddedFile = new pbxFile(fpath, opt);

          embeddedFile.uuid = this.generateUuid();
          embeddedFile.fileRef = file.fileRef;

          //keeping a separate PBXBuildFile entry for Embed Frameworks
          this.addToPbxBuildFileSection(embeddedFile);        // PBXBuildFile

          this.addToPbxEmbedFrameworksBuildPhase(embeddedFile); // PBXCopyFilesBuildPhase

          return embeddedFile;
        }
    }

    return file;
}

pbxProject.prototype.removeFramework = function(fpath, opt) {
    var embed = opt && opt.embed;

    if (opt) {
      delete opt.embed;
    }

    var file = new pbxFile(fpath, opt);
    file.target = opt ? opt.target : undefined;

    this.removeFromPbxBuildFileSection(file);          // PBXBuildFile
    this.removeFromPbxFileReferenceSection(file);      // PBXFileReference
    this.removeFromFrameworksPbxGroup(file);           // PBXGroup
    this.removeFromPbxFrameworksBuildPhase(file);      // PBXFrameworksBuildPhase

    if (opt && opt.customFramework) {
        this.removeFromFrameworkSearchPaths(file);
    }

    opt = opt || {};
    opt.embed = true;
    var embeddedFile = new pbxFile(fpath, opt);

    embeddedFile.fileRef = file.fileRef;

    this.removeFromPbxBuildFileSection(embeddedFile);          // PBXBuildFile
    this.removeFromPbxEmbedFrameworksBuildPhase(embeddedFile); // PBXCopyFilesBuildPhase

    return file;
}


pbxProject.prototype.addCopyfile = function(fpath, opt) {
    var file = new pbxFile(fpath, opt);

    // catch duplicates
    if (this.hasFile(file.path)) {
        file = this.hasFile(file.path);
    }

    file.fileRef = file.uuid = this.generateUuid();
    file.target = opt ? opt.target : undefined;

    this.addToPbxBuildFileSection(file);        // PBXBuildFile
    this.addToPbxFileReferenceSection(file);    // PBXFileReference
    this.addToPbxCopyfilesBuildPhase(file);     // PBXCopyFilesBuildPhase

    return file;
}

pbxProject.prototype.pbxCopyfilesBuildPhaseObj = function(target) {
    return this.buildPhaseObject('PBXCopyFilesBuildPhase', 'Copy Files', target);
}

pbxProject.prototype.addToPbxCopyfilesBuildPhase = function(file) {
    var sources = this.buildPhaseObject('PBXCopyFilesBuildPhase', 'Copy Files', file.target);
    sources.files.push(pbxBuildPhaseObj(file));
}

pbxProject.prototype.removeCopyfile = function(fpath, opt) {
    var file = new pbxFile(fpath, opt);
    file.target = opt ? opt.target : undefined;

    this.removeFromPbxBuildFileSection(file);        // PBXBuildFile
    this.removeFromPbxFileReferenceSection(file);    // PBXFileReference
    this.removeFromPbxCopyfilesBuildPhase(file);    // PBXFrameworksBuildPhase

    return file;
}

pbxProject.prototype.removeFromPbxCopyfilesBuildPhase = function(file) {
    var sources = this.pbxCopyfilesBuildPhaseObj(file.target);
    for (i in sources.files) {
        if (sources.files[i].comment == longComment(file)) {
            sources.files.splice(i, 1);
            break;
        }
    }
}

pbxProject.prototype.addStaticLibrary = function(path, opt) {
    opt = opt || {};

    var file;

    if (opt.plugin) {
        file = this.addPluginFile(path, opt);
        if (!file) return false;
    } else {
        file = new pbxFile(path, opt);
        if (this.hasFile(file.path)) return false;
    }

    file.uuid = this.generateUuid();
    file.target = opt ? opt.target : undefined;

    if (!opt.plugin) {
        file.fileRef = this.generateUuid();
        this.addToPbxFileReferenceSection(file);    // PBXFileReference
    }

    this.addToPbxBuildFileSection(file);        // PBXBuildFile
    this.addToPbxFrameworksBuildPhase(file);    // PBXFrameworksBuildPhase
    this.addToLibrarySearchPaths(file);        // make sure it gets built!

    return file;
}

// helper addition functions
pbxProject.prototype.addToPbxBuildFileSection = function(file) {
    var commentKey = f("%s_comment", file.uuid);

    this.pbxBuildFileSection()[file.uuid] = pbxBuildFileObj(file);
    this.pbxBuildFileSection()[commentKey] = pbxBuildFileComment(file);
}

pbxProject.prototype.removeFromPbxBuildFileSection = function(file) {
    var uuid;

    for (uuid in this.pbxBuildFileSection()) {
        if (this.pbxBuildFileSection()[uuid].fileRef_comment == file.basename) {
            file.uuid = uuid;
            delete this.pbxBuildFileSection()[uuid];
        }
    }
    var commentKey = f("%s_comment", file.uuid);
    delete this.pbxBuildFileSection()[commentKey];
}

pbxProject.prototype.addPbxGroup = function(filePathsArray, name, path, sourceTree) {
    var groups = this.hash.project.objects['PBXGroup'],
        pbxGroupUuid = this.generateUuid(),
        commentKey = f("%s_comment", pbxGroupUuid),
        pbxGroup = {
            isa: 'PBXGroup',
            children: [],
            name: name,
            path: path,
            sourceTree: sourceTree ? sourceTree : '"<group>"'
        },
        fileReferenceSection = this.pbxFileReferenceSection(),
        filePathToReference = {};

    for (var key in fileReferenceSection) {
        // only look for comments
        if (!COMMENT_KEY.test(key)) continue;

        var fileReferenceKey = key.split(COMMENT_KEY)[0],
            fileReference = fileReferenceSection[fileReferenceKey];

        filePathToReference[fileReference.path] = { fileRef: fileReferenceKey, basename: fileReferenceSection[key] };
    }

    for (var index = 0; index < filePathsArray.length; index++) {
        var filePath = filePathsArray[index],
            filePathQuoted = "\"" + filePath + "\"";
        if (filePathToReference[filePath]) {
            pbxGroup.children.push(pbxGroupChild(filePathToReference[filePath]));
            continue;
        } else if (filePathToReference[filePathQuoted]) {
            pbxGroup.children.push(pbxGroupChild(filePathToReference[filePathQuoted]));
            continue;
        }

        var file = new pbxFile(filePath);
        file.uuid = this.generateUuid();
        file.fileRef = this.generateUuid();
        this.addToPbxFileReferenceSection(file);    // PBXFileReference
        this.addToPbxBuildFileSection(file);        // PBXBuildFile
        pbxGroup.children.push(pbxGroupChild(file));
    }

    if (groups) {
        groups[pbxGroupUuid] = pbxGroup;
        groups[commentKey] = name;
    }

    return { uuid: pbxGroupUuid, pbxGroup: pbxGroup };
}

pbxProject.prototype.removePbxGroup = function (groupName) {
    var section = this.hash.project.objects['PBXGroup'],
        key, itemKey;

    for (key in section) {
        // only look for comments
        if (!COMMENT_KEY.test(key)) continue;

        if (section[key] == groupName) {
            itemKey = key.split(COMMENT_KEY)[0];
            delete section[itemKey];
        }
    }
}

pbxProject.prototype.addToPbxProjectSection = function(target) {

    var newTarget = {
            value: target.uuid,
            comment: pbxNativeTargetComment(target.pbxNativeTarget)
        };

    this.pbxProjectSection()[this.getFirstProject()['uuid']]['targets'].push(newTarget);
}

pbxProject.prototype.addToPbxNativeTargetSection = function(target) {
    var commentKey = f("%s_comment", target.uuid);

    this.pbxNativeTargetSection()[target.uuid] = target.pbxNativeTarget;
    this.pbxNativeTargetSection()[commentKey] = target.pbxNativeTarget.name;
}

pbxProject.prototype.addToPbxFileReferenceSection = function(file) {
    var commentKey = f("%s_comment", file.fileRef);

    this.pbxFileReferenceSection()[file.fileRef] = pbxFileReferenceObj(file);
    this.pbxFileReferenceSection()[commentKey] = pbxFileReferenceComment(file);
}

pbxProject.prototype.removeFromPbxFileReferenceSection = function(file) {

    var i;
    var refObj = pbxFileReferenceObj(file);
    for (i in this.pbxFileReferenceSection()) {
        if (this.pbxFileReferenceSection()[i].name == refObj.name ||
            ('"' + this.pbxFileReferenceSection()[i].name + '"') == refObj.name ||
            this.pbxFileReferenceSection()[i].path == refObj.path ||
            ('"' + this.pbxFileReferenceSection()[i].path + '"') == refObj.path) {
            file.fileRef = file.uuid = i;
            delete this.pbxFileReferenceSection()[i];
            break;
        }
    }
    var commentKey = f("%s_comment", file.fileRef);
    if (this.pbxFileReferenceSection()[commentKey] != undefined) {
        delete this.pbxFileReferenceSection()[commentKey];
    }

    return file;
}

pbxProject.prototype.addToXcVersionGroupSection = function(file) {
    if (!file.models || !file.currentModel) {
        throw new Error("Cannot create a XCVersionGroup section from not a data model document file");
    }

    var commentKey = f("%s_comment", file.fileRef);

    if (!this.xcVersionGroupSection()[file.fileRef]) {
        this.xcVersionGroupSection()[file.fileRef] = {
            isa: 'XCVersionGroup',
            children: file.models.map(function (el) { return el.fileRef; }),
            currentVersion: file.currentModel.fileRef,
            name: path.basename(file.path),
            path: file.path,
            sourceTree: '"<group>"',
            versionGroupType: 'wrapper.xcdatamodel'
        };
        this.xcVersionGroupSection()[commentKey] = path.basename(file.path);
    }
}

pbxProject.prototype.addToPluginsPbxGroup = function(file) {
    var pluginsGroup = this.pbxGroupByName('Plugins');
    pluginsGroup.children.push(pbxGroupChild(file));
}

pbxProject.prototype.removeFromPluginsPbxGroup = function(file) {
    var pluginsGroupChildren = this.pbxGroupByName('Plugins').children, i;
    for (i in pluginsGroupChildren) {
        if (pbxGroupChild(file).value == pluginsGroupChildren[i].value &&
            pbxGroupChild(file).comment == pluginsGroupChildren[i].comment) {
            pluginsGroupChildren.splice(i, 1);
            break;
        }
    }
}

pbxProject.prototype.addToResourcesPbxGroup = function(file) {
    var pluginsGroup = this.pbxGroupByName('Resources');
    pluginsGroup.children.push(pbxGroupChild(file));
}

pbxProject.prototype.removeFromResourcesPbxGroup = function(file) {
    var pluginsGroupChildren = this.pbxGroupByName('Resources').children, i;
    for (i in pluginsGroupChildren) {
        if (pbxGroupChild(file).value == pluginsGroupChildren[i].value &&
            pbxGroupChild(file).comment == pluginsGroupChildren[i].comment) {
            pluginsGroupChildren.splice(i, 1);
            break;
        }
    }
}

pbxProject.prototype.addToFrameworksPbxGroup = function(file) {
    var pluginsGroup = this.pbxGroupByName('Frameworks');
    pluginsGroup.children.push(pbxGroupChild(file));
}

pbxProject.prototype.removeFromFrameworksPbxGroup = function(file) {
    var pluginsGroupChildren = this.pbxGroupByName('Frameworks').children;

    for (i in pluginsGroupChildren) {
        if (pbxGroupChild(file).value == pluginsGroupChildren[i].value &&
            pbxGroupChild(file).comment == pluginsGroupChildren[i].comment) {
            pluginsGroupChildren.splice(i, 1);
            break;
        }
    }
}

pbxProject.prototype.addToPbxEmbedFrameworksBuildPhase = function (file) {
    var sources = this.pbxEmbedFrameworksBuildPhaseObj(file.target);
    if (sources) {
        sources.files.push(pbxBuildPhaseObj(file));
    }
}

pbxProject.prototype.removeFromPbxEmbedFrameworksBuildPhase = function (file) {
    var sources = this.pbxEmbedFrameworksBuildPhaseObj(file.target);
    if (sources) {
        var files = [];
        for (i in sources.files) {
            if (sources.files[i].comment != longComment(file)) {
                files.push(sources.files[i]);
            }
        }
        sources.files = files;
    }
}

pbxProject.prototype.addToProductsPbxGroup = function(file) {
    var productsGroup = this.pbxGroupByName('Products');
    productsGroup.children.push(pbxGroupChild(file));
}

pbxProject.prototype.removeFromProductsPbxGroup = function(file) {
    var productsGroupChildren = this.pbxGroupByName('Products').children, i;
    for (i in productsGroupChildren) {
        if (pbxGroupChild(file).value == productsGroupChildren[i].value &&
            pbxGroupChild(file).comment == productsGroupChildren[i].comment) {
            productsGroupChildren.splice(i, 1);
            break;
        }
    }
}

pbxProject.prototype.addToPbxSourcesBuildPhase = function(file) {
    var sources = this.pbxSourcesBuildPhaseObj(file.target);
    sources.files.push(pbxBuildPhaseObj(file));
}

pbxProject.prototype.removeFromPbxSourcesBuildPhase = function(file) {

    var sources = this.pbxSourcesBuildPhaseObj(file.target), i;
    for (i in sources.files) {
        if (sources.files[i].comment == longComment(file)) {
            sources.files.splice(i, 1);
            break;
        }
    }
}

pbxProject.prototype.addToPbxResourcesBuildPhase = function(file) {
    var sources = this.pbxResourcesBuildPhaseObj(file.target);
    sources.files.push(pbxBuildPhaseObj(file));
}

pbxProject.prototype.removeFromPbxResourcesBuildPhase = function(file) {
    var sources = this.pbxResourcesBuildPhaseObj(file.target), i;

    for (i in sources.files) {
        if (sources.files[i].comment == longComment(file)) {
            sources.files.splice(i, 1);
            break;
        }
    }
}

pbxProject.prototype.addToPbxFrameworksBuildPhase = function(file) {
    var sources = this.pbxFrameworksBuildPhaseObj(file.target);
    sources.files.push(pbxBuildPhaseObj(file));
}

pbxProject.prototype.removeFromPbxFrameworksBuildPhase = function(file) {
    var sources = this.pbxFrameworksBuildPhaseObj(file.target);
    for (i in sources.files) {
        if (sources.files[i].comment == longComment(file)) {
            sources.files.splice(i, 1);
            break;
        }
    }
}

pbxProject.prototype.addXCConfigurationList = function(configurationObjectsArray, defaultConfigurationName, comment) {
    var pbxBuildConfigurationSection = this.pbxXCBuildConfigurationSection(),
        pbxXCConfigurationListSection = this.pbxXCConfigurationList(),
        xcConfigurationListUuid = this.generateUuid(),
        commentKey = f("%s_comment", xcConfigurationListUuid),
        xcConfigurationList = {
            isa: 'XCConfigurationList',
            buildConfigurations: [],
            defaultConfigurationIsVisible: 0,
            defaultConfigurationName: defaultConfigurationName
        };

    for (var index = 0; index < configurationObjectsArray.length; index++) {
        var configuration = configurationObjectsArray[index],
            configurationUuid = this.generateUuid(),
            configurationCommentKey = f("%s_comment", configurationUuid);

        pbxBuildConfigurationSection[configurationUuid] = configuration;
        pbxBuildConfigurationSection[configurationCommentKey] = configuration.name;
        xcConfigurationList.buildConfigurations.push({ value: configurationUuid, comment: configuration.name });
    }

    if (pbxXCConfigurationListSection) {
        pbxXCConfigurationListSection[xcConfigurationListUuid] = xcConfigurationList;
        pbxXCConfigurationListSection[commentKey] = comment;
    }

    return { uuid: xcConfigurationListUuid, xcConfigurationList: xcConfigurationList };
}

pbxProject.prototype.addTargetDependency = function(target, dependencyTargets) {
    if (!target)
        return undefined;

    var nativeTargets = this.pbxNativeTargetSection();

    if (typeof nativeTargets[target] == "undefined")
        throw new Error("Invalid target: " + target);

    for (var index = 0; index < dependencyTargets.length; index++) {
        var dependencyTarget = dependencyTargets[index];
        if (typeof nativeTargets[dependencyTarget] == "undefined")
            throw new Error("Invalid target: " + dependencyTarget);
        }

    var pbxTargetDependency = 'PBXTargetDependency',
        pbxContainerItemProxy = 'PBXContainerItemProxy',
        pbxTargetDependencySection = this.hash.project.objects[pbxTargetDependency],
        pbxContainerItemProxySection = this.hash.project.objects[pbxContainerItemProxy];

    for (var index = 0; index < dependencyTargets.length; index++) {
        var dependencyTargetUuid = dependencyTargets[index],
            dependencyTargetCommentKey = f("%s_comment", dependencyTargetUuid),
            targetDependencyUuid = this.generateUuid(),
            targetDependencyCommentKey = f("%s_comment", targetDependencyUuid),
            itemProxyUuid = this.generateUuid(),
            itemProxyCommentKey = f("%s_comment", itemProxyUuid),
            itemProxy = {
                isa: pbxContainerItemProxy,
                containerPortal: this.hash.project['rootObject'],
                containerPortal_comment: this.hash.project['rootObject_comment'],
                proxyType: 1,
                remoteGlobalIDString: dependencyTargetUuid,
                remoteInfo: nativeTargets[dependencyTargetUuid].name
            },
            targetDependency = {
                isa: pbxTargetDependency,
                target: dependencyTargetUuid,
                target_comment: nativeTargets[dependencyTargetCommentKey],
                targetProxy: itemProxyUuid,
                targetProxy_comment: pbxContainerItemProxy
            };

        if (pbxContainerItemProxySection && pbxTargetDependencySection) {
            pbxContainerItemProxySection[itemProxyUuid] = itemProxy;
            pbxContainerItemProxySection[itemProxyCommentKey] = pbxContainerItemProxy;
            pbxTargetDependencySection[targetDependencyUuid] = targetDependency;
            pbxTargetDependencySection[targetDependencyCommentKey] = pbxTargetDependency;
            nativeTargets[target].dependencies.push({ value: targetDependencyUuid, comment: pbxTargetDependency })
        }
    }

    return { uuid: target, target: nativeTargets[target] };
}

pbxProject.prototype.addBuildPhase = function(filePathsArray, buildPhaseType, comment, target, optionsOrFolderType, subfolderPath) {
    var buildPhaseSection,
        fileReferenceSection = this.pbxFileReferenceSection(),
        buildFileSection = this.pbxBuildFileSection(),
        buildPhaseUuid = this.generateUuid(),
        buildPhaseTargetUuid = target || this.getFirstTarget().uuid,
        commentKey = f("%s_comment", buildPhaseUuid),
        buildPhase = {
            isa: buildPhaseType,
            buildActionMask: 2147483647,
            files: [],
            runOnlyForDeploymentPostprocessing: 0
        },
        filePathToBuildFile = {};

    if (buildPhaseType === 'PBXCopyFilesBuildPhase') {
        buildPhase = pbxCopyFilesBuildPhaseObj(buildPhase, optionsOrFolderType, subfolderPath, comment);
    } else if (buildPhaseType === 'PBXShellScriptBuildPhase') {
        buildPhase = pbxShellScriptBuildPhaseObj(buildPhase, optionsOrFolderType, comment)
    }

    if (!this.hash.project.objects[buildPhaseType]) {
        this.hash.project.objects[buildPhaseType] = new Object();
    }

    if (!this.hash.project.objects[buildPhaseType][buildPhaseUuid]) {
        this.hash.project.objects[buildPhaseType][buildPhaseUuid] = buildPhase;
        this.hash.project.objects[buildPhaseType][commentKey] = comment;
    }

    if (this.hash.project.objects['PBXNativeTarget'][buildPhaseTargetUuid]['buildPhases']) {
        this.hash.project.objects['PBXNativeTarget'][buildPhaseTargetUuid]['buildPhases'].push({
            value: buildPhaseUuid,
            comment: comment
        })

    }


    for (var key in buildFileSection) {
        // only look for comments
        if (!COMMENT_KEY.test(key)) continue;

        var buildFileKey = key.split(COMMENT_KEY)[0],
            buildFile = buildFileSection[buildFileKey];
        fileReference = fileReferenceSection[buildFile.fileRef];

        if (!fileReference) continue;

        var pbxFileObj = new pbxFile(fileReference.path);

        filePathToBuildFile[fileReference.path] = { uuid: buildFileKey, basename: pbxFileObj.basename, group: pbxFileObj.group };
    }

    for (var index = 0; index < filePathsArray.length; index++) {
        var filePath = filePathsArray[index],
            filePathQuoted = "\"" + filePath + "\"",
            file = new pbxFile(filePath);

        if (filePathToBuildFile[filePath]) {
            buildPhase.files.push(pbxBuildPhaseObj(filePathToBuildFile[filePath]));
            continue;
        } else if (filePathToBuildFile[filePathQuoted]) {
            buildPhase.files.push(pbxBuildPhaseObj(filePathToBuildFile[filePathQuoted]));
            continue;
        }

        file.uuid = this.generateUuid();
        file.fileRef = this.generateUuid();
        this.addToPbxFileReferenceSection(file);    // PBXFileReference
        this.addToPbxBuildFileSection(file);        // PBXBuildFile
        buildPhase.files.push(pbxBuildPhaseObj(file));
    }

    if (buildPhaseSection) {
        buildPhaseSection[buildPhaseUuid] = buildPhase;
        buildPhaseSection[commentKey] = comment;
    }

    return { uuid: buildPhaseUuid, buildPhase: buildPhase };
}

// helper access functions
pbxProject.prototype.pbxProjectSection = function() {
    return this.hash.project.objects['PBXProject'];
}
pbxProject.prototype.pbxBuildFileSection = function() {
    return this.hash.project.objects['PBXBuildFile'];
}

pbxProject.prototype.pbxXCBuildConfigurationSection = function() {
    return this.hash.project.objects['XCBuildConfiguration'];
}

pbxProject.prototype.pbxFileReferenceSection = function() {
    return this.hash.project.objects['PBXFileReference'];
}

pbxProject.prototype.pbxNativeTargetSection = function() {
    return this.hash.project.objects['PBXNativeTarget'];
}

pbxProject.prototype.xcVersionGroupSection = function () {
    if (typeof this.hash.project.objects['XCVersionGroup'] !== 'object') {
        this.hash.project.objects['XCVersionGroup'] = {};
    }

    return this.hash.project.objects['XCVersionGroup'];
}

pbxProject.prototype.pbxXCConfigurationList = function() {
    return this.hash.project.objects['XCConfigurationList'];
}

pbxProject.prototype.pbxGroupByName = function(name) {
    var groups = this.hash.project.objects['PBXGroup'],
        key, groupKey;

    for (key in groups) {
        // only look for comments
        if (!COMMENT_KEY.test(key)) continue;

        if (groups[key] == name) {
            groupKey = key.split(COMMENT_KEY)[0];
            return groups[groupKey];
        }
    }

    return null;
}

pbxProject.prototype.pbxTargetByName = function(name) {
    return this.pbxItemByComment(name, 'PBXNativeTarget');
}

pbxProject.prototype.findTargetKey = function(name) {
    var targets = this.hash.project.objects['PBXNativeTarget'];

    for (var key in targets) {
        // only look for comments
        if (COMMENT_KEY.test(key)) continue;

        var target = targets[key];
        if (target.name === name) {
            return key;
        }
    }

    return null;
}

pbxProject.prototype.pbxItemByComment = function(name, pbxSectionName) {
    var section = this.hash.project.objects[pbxSectionName],
        key, itemKey;

    for (key in section) {
        // only look for comments
        if (!COMMENT_KEY.test(key)) continue;

        if (section[key] == name) {
            itemKey = key.split(COMMENT_KEY)[0];
            return section[itemKey];
        }
    }

    return null;
}

pbxProject.prototype.pbxSourcesBuildPhaseObj = function(target) {
    return this.buildPhaseObject('PBXSourcesBuildPhase', 'Sources', target);
}

pbxProject.prototype.pbxResourcesBuildPhaseObj = function(target) {
    return this.buildPhaseObject('PBXResourcesBuildPhase', 'Resources', target);
}

pbxProject.prototype.pbxFrameworksBuildPhaseObj = function(target) {
    return this.buildPhaseObject('PBXFrameworksBuildPhase', 'Frameworks', target);
}

pbxProject.prototype.pbxEmbedFrameworksBuildPhaseObj = function (target) {
    return this.buildPhaseObject('PBXCopyFilesBuildPhase', 'Embed Frameworks', target);
};

// Find Build Phase from group/target
pbxProject.prototype.buildPhase = function(group, target) {

    if (!target)
        return undefined;

    var nativeTargets = this.pbxNativeTargetSection();
     if (typeof nativeTargets[target] == "undefined")
        throw new Error("Invalid target: " + target);

    var nativeTarget = nativeTargets[target];
    var buildPhases = nativeTarget.buildPhases;
     for(var i in buildPhases)
     {
        var buildPhase = buildPhases[i];
        if (buildPhase.comment==group)
            return buildPhase.value + "_comment";
        }
    }

pbxProject.prototype.buildPhaseObject = function(name, group, target) {
    var section = this.hash.project.objects[name],
        obj, sectionKey, key;
    var buildPhase = this.buildPhase(group, target);

    for (key in section) {

        // only look for comments
        if (!COMMENT_KEY.test(key)) continue;

        // select the proper buildPhase
        if (buildPhase && buildPhase!=key)
            continue;
        if (section[key] == group) {
            sectionKey = key.split(COMMENT_KEY)[0];
            return section[sectionKey];
        }
    }
    return null;
}

pbxProject.prototype.addBuildProperty = function(prop, value, build_name) {
    var configurations = nonComments(this.pbxXCBuildConfigurationSection()),
        key, configuration;

    for (key in configurations){
        configuration = configurations[key];
        if (!build_name || configuration.name === build_name){
            configuration.buildSettings[prop] = value;
        }
    }
}

pbxProject.prototype.removeBuildProperty = function(prop, build_name) {
    var configurations = nonComments(this.pbxXCBuildConfigurationSection()),
        key, configuration;

    for (key in configurations){
        configuration = configurations[key];
        if (configuration.buildSettings[prop] &&
            !build_name || configuration.name === build_name){
            delete configuration.buildSettings[prop];
        }
    }
}

/**
 *
 * @param prop {String}
 * @param value {String|Array|Object|Number|Boolean}
 * @param build {String} Release or Debug
 */
pbxProject.prototype.updateBuildProperty = function(prop, value, build) {
    var configs = this.pbxXCBuildConfigurationSection();
    for (var configName in configs) {
        if (!COMMENT_KEY.test(configName)) {
            var config = configs[configName];
            if ( (build && config.name === build) || (!build) ) {
                config.buildSettings[prop] = value;
            }
        }
    }
}

pbxProject.prototype.updateProductName = function(name) {
    this.updateBuildProperty('PRODUCT_NAME', '"' + name + '"');
}

pbxProject.prototype.removeFromFrameworkSearchPaths = function(file) {
    var configurations = nonComments(this.pbxXCBuildConfigurationSection()),
        INHERITED = '"$(inherited)"',
        SEARCH_PATHS = 'FRAMEWORK_SEARCH_PATHS',
        config, buildSettings, searchPaths;
    var new_path = searchPathForFile(file, this);

    for (config in configurations) {
        buildSettings = configurations[config].buildSettings;

        if (unquote(buildSettings['PRODUCT_NAME']) != this.productName)
            continue;

        searchPaths = buildSettings[SEARCH_PATHS];

        if (searchPaths) {
            var matches = searchPaths.filter(function(p) {
                return p.indexOf(new_path) > -1;
            });
            matches.forEach(function(m) {
                var idx = searchPaths.indexOf(m);
                searchPaths.splice(idx, 1);
            });
        }
    }
}

pbxProject.prototype.addToFrameworkSearchPaths = function(file) {
    var configurations = nonComments(this.pbxXCBuildConfigurationSection()),
        INHERITED = '"$(inherited)"',
        config, buildSettings, searchPaths;

    for (config in configurations) {
        buildSettings = configurations[config].buildSettings;

        if (unquote(buildSettings['PRODUCT_NAME']) != this.productName)
            continue;

        if (!buildSettings['FRAMEWORK_SEARCH_PATHS']
            || buildSettings['FRAMEWORK_SEARCH_PATHS'] === INHERITED) {
            buildSettings['FRAMEWORK_SEARCH_PATHS'] = [INHERITED];
        }

        buildSettings['FRAMEWORK_SEARCH_PATHS'].push(searchPathForFile(file, this));
    }
}

pbxProject.prototype.removeFromLibrarySearchPaths = function(file) {
    var configurations = nonComments(this.pbxXCBuildConfigurationSection()),
        INHERITED = '"$(inherited)"',
        SEARCH_PATHS = 'LIBRARY_SEARCH_PATHS',
        config, buildSettings, searchPaths;
    var new_path = searchPathForFile(file, this);

    for (config in configurations) {
        buildSettings = configurations[config].buildSettings;

        if (unquote(buildSettings['PRODUCT_NAME']) != this.productName)
            continue;

        searchPaths = buildSettings[SEARCH_PATHS];

        if (searchPaths) {
            var matches = searchPaths.filter(function(p) {
                return p.indexOf(new_path) > -1;
            });
            matches.forEach(function(m) {
                var idx = searchPaths.indexOf(m);
                searchPaths.splice(idx, 1);
            });
        }

    }
}

pbxProject.prototype.addToLibrarySearchPaths = function(file) {
    var configurations = nonComments(this.pbxXCBuildConfigurationSection()),
        INHERITED = '"$(inherited)"',
        config, buildSettings, searchPaths;

    for (config in configurations) {
        buildSettings = configurations[config].buildSettings;

        if (unquote(buildSettings['PRODUCT_NAME']) != this.productName)
            continue;

        if (!buildSettings['LIBRARY_SEARCH_PATHS']
            || buildSettings['LIBRARY_SEARCH_PATHS'] === INHERITED) {
            buildSettings['LIBRARY_SEARCH_PATHS'] = [INHERITED];
        }

        if (typeof file === 'string') {
            buildSettings['LIBRARY_SEARCH_PATHS'].push(file);
        } else {
            buildSettings['LIBRARY_SEARCH_PATHS'].push(searchPathForFile(file, this));
        }
    }
}

pbxProject.prototype.removeFromHeaderSearchPaths = function(file) {
    var configurations = nonComments(this.pbxXCBuildConfigurationSection()),
        INHERITED = '"$(inherited)"',
        SEARCH_PATHS = 'HEADER_SEARCH_PATHS',
        config, buildSettings, searchPaths;
    var new_path = searchPathForFile(file, this);

    for (config in configurations) {
        buildSettings = configurations[config].buildSettings;

        if (unquote(buildSettings['PRODUCT_NAME']) != this.productName)
            continue;

        if (buildSettings[SEARCH_PATHS]) {
            var matches = buildSettings[SEARCH_PATHS].filter(function(p) {
                return p.indexOf(new_path) > -1;
            });
            matches.forEach(function(m) {
                var idx = buildSettings[SEARCH_PATHS].indexOf(m);
                buildSettings[SEARCH_PATHS].splice(idx, 1);
            });
        }

    }
}
pbxProject.prototype.addToHeaderSearchPaths = function(file) {
    var configurations = nonComments(this.pbxXCBuildConfigurationSection()),
        INHERITED = '"$(inherited)"',
        config, buildSettings, searchPaths;

    for (config in configurations) {
        buildSettings = configurations[config].buildSettings;

        if (unquote(buildSettings['PRODUCT_NAME']) != this.productName)
            continue;

        if (!buildSettings['HEADER_SEARCH_PATHS']) {
            buildSettings['HEADER_SEARCH_PATHS'] = [INHERITED];
        }

        if (typeof file === 'string') {
            buildSettings['HEADER_SEARCH_PATHS'].push(file);
        } else {
            buildSettings['HEADER_SEARCH_PATHS'].push(searchPathForFile(file, this));
        }
    }
}

pbxProject.prototype.addToOtherLinkerFlags = function (flag) {
    var configurations = nonComments(this.pbxXCBuildConfigurationSection()),
        INHERITED = '"$(inherited)"',
        OTHER_LDFLAGS = 'OTHER_LDFLAGS',
        config, buildSettings;

    for (config in configurations) {
        buildSettings = configurations[config].buildSettings;

        if (unquote(buildSettings['PRODUCT_NAME']) != this.productName)
            continue;

        if (!buildSettings[OTHER_LDFLAGS]
                || buildSettings[OTHER_LDFLAGS] === INHERITED) {
            buildSettings[OTHER_LDFLAGS] = [INHERITED];
        }

        buildSettings[OTHER_LDFLAGS].push(flag);
    }
}

pbxProject.prototype.removeFromOtherLinkerFlags = function (flag) {
    var configurations = nonComments(this.pbxXCBuildConfigurationSection()),
        OTHER_LDFLAGS = 'OTHER_LDFLAGS',
        config, buildSettings;

    for (config in configurations) {
        buildSettings = configurations[config].buildSettings;

        if (unquote(buildSettings['PRODUCT_NAME']) != this.productName) {
            continue;
        }

        if (buildSettings[OTHER_LDFLAGS]) {
            var matches = buildSettings[OTHER_LDFLAGS].filter(function (p) {
                return p.indexOf(flag) > -1;
            });
            matches.forEach(function (m) {
                var idx = buildSettings[OTHER_LDFLAGS].indexOf(m);
                buildSettings[OTHER_LDFLAGS].splice(idx, 1);
            });
        }
    }
}

pbxProject.prototype.addToBuildSettings = function (buildSetting, value) {
    var configurations = nonComments(this.pbxXCBuildConfigurationSection()),
        config, buildSettings;

    for (config in configurations) {
        buildSettings = configurations[config].buildSettings;

        buildSettings[buildSetting] = value;
    }
}

pbxProject.prototype.removeFromBuildSettings = function (buildSetting) {
    var configurations = nonComments(this.pbxXCBuildConfigurationSection()),
        config, buildSettings;

    for (config in configurations) {
        buildSettings = configurations[config].buildSettings;

        if (buildSettings[buildSetting]) {
            delete buildSettings[buildSetting];
        }
    }
}

// a JS getter. hmmm
pbxProject.prototype.__defineGetter__("productName", function() {
    var configurations = nonComments(this.pbxXCBuildConfigurationSection()),
        config, productName;

    for (config in configurations) {
        productName = configurations[config].buildSettings['PRODUCT_NAME'];

        if (productName) {
            return unquote(productName);
        }
    }
});

// check if file is present
pbxProject.prototype.hasFile = function(filePath) {
    var files = nonComments(this.pbxFileReferenceSection()),
        file, id;
    for (id in files) {
        file = files[id];
        if (file.path == filePath || file.path == ('"' + filePath + '"')) {
            return file;
        }
    }

    return false;
}

pbxProject.prototype.addTarget = function(name, type, subfolder) {

    // Setup uuid and name of new target
    var targetUuid = this.generateUuid(),
        targetType = type,
        targetSubfolder = subfolder || name,
        targetName = name.trim();

    // Check type against list of allowed target types
    if (!targetName) {
        throw new Error("Target name missing.");
    }

    // Check type against list of allowed target types
    if (!targetType) {
        throw new Error("Target type missing.");
    }

    // Check type against list of allowed target types
    if (!producttypeForTargettype(targetType)) {
        throw new Error("Target type invalid: " + targetType);
    }

    // Build Configuration: Create
    var buildConfigurationsList = [
        {
            name: 'Debug',
            isa: 'XCBuildConfiguration',
            buildSettings: {
                GCC_PREPROCESSOR_DEFINITIONS: ['"DEBUG=1"', '"$(inherited)"'],
                INFOPLIST_FILE: '"' + path.join(targetSubfolder, targetSubfolder + '-Info.plist' + '"'),
                LD_RUNPATH_SEARCH_PATHS: '"$(inherited) @executable_path/Frameworks @executable_path/../../Frameworks"',
                PRODUCT_NAME: '"' + targetName + '"',
                SKIP_INSTALL: 'YES'
            }
        },
        {
            name: 'Release',
            isa: 'XCBuildConfiguration',
            buildSettings: {
                INFOPLIST_FILE: '"' + path.join(targetSubfolder, targetSubfolder + '-Info.plist' + '"'),
                LD_RUNPATH_SEARCH_PATHS: '"$(inherited) @executable_path/Frameworks @executable_path/../../Frameworks"',
                PRODUCT_NAME: '"' + targetName + '"',
                SKIP_INSTALL: 'YES'
            }
        }
    ];

    // Build Configuration: Add
    var buildConfigurations = this.addXCConfigurationList(buildConfigurationsList, 'Release', 'Build configuration list for PBXNativeTarget "' + targetName +'"');

    // Product: Create
    var productName = targetName,
        productType = producttypeForTargettype(targetType),
        productFileType = filetypeForProducttype(productType),
        productFile = this.addProductFile(productName, { group: 'Copy Files', 'target': targetUuid, 'explicitFileType': productFileType}),
        productFileName = productFile.basename;


    // Product: Add to build file list
    this.addToPbxBuildFileSection(productFile);

    // Target: Create
    var target = {
            uuid: targetUuid,
            pbxNativeTarget: {
                isa: 'PBXNativeTarget',
                name: '"' + targetName + '"',
                productName: '"' + targetName + '"',
                productReference: productFile.fileRef,
                productType: '"' + producttypeForTargettype(targetType) + '"',
                buildConfigurationList: buildConfigurations.uuid,
                buildPhases: [],
                buildRules: [],
                dependencies: []
            }
    };

    // Target: Add to PBXNativeTarget section
    this.addToPbxNativeTargetSection(target)

    // Product: Embed (only for "extension"-type targets)
    if (targetType === 'app_extension') {

        // Create CopyFiles phase in first target
        this.addBuildPhase([], 'PBXCopyFilesBuildPhase', 'Copy Files', this.getFirstTarget().uuid,  targetType)

        // Add product to CopyFiles phase
        this.addToPbxCopyfilesBuildPhase(productFile)

       // this.addBuildPhaseToTarget(newPhase.buildPhase, this.getFirstTarget().uuid)

    };

    // Target: Add uuid to root project
    this.addToPbxProjectSection(target);

    // Target: Add dependency for this target to first (main) target
    this.addTargetDependency(this.getFirstTarget().uuid, [target.uuid]);


    // Return target on success
    return target;

};

// helper recursive prop search+replace
function propReplace(obj, prop, value) {
    var o = {};
    for (var p in obj) {
        if (o.hasOwnProperty.call(obj, p)) {
            if (typeof obj[p] == 'object' && !Array.isArray(obj[p])) {
                propReplace(obj[p], prop, value);
            } else if (p == prop) {
                obj[p] = value;
            }
        }
    }
}

// helper object creation functions
function pbxBuildFileObj(file) {
    var obj = Object.create(null);

    obj.isa = 'PBXBuildFile';
    obj.fileRef = file.fileRef;
    obj.fileRef_comment = file.basename;
    if (file.settings) obj.settings = file.settings;

    return obj;
}

function pbxFileReferenceObj(file) {
    var fileObject = {
        isa: "PBXFileReference",
        name: "\"" + file.basename + "\"",
        path: "\"" + file.path.replace(/\\/g, '/') + "\"",
        sourceTree: file.sourceTree,
        fileEncoding: file.fileEncoding,
        lastKnownFileType: file.lastKnownFileType,
        explicitFileType: file.explicitFileType,
        includeInIndex: file.includeInIndex
    };

    return fileObject;
}

function pbxGroupChild(file) {
    var obj = Object.create(null);

    obj.value = file.fileRef;
    obj.comment = file.basename;

    return obj;
}

function pbxBuildPhaseObj(file) {
    var obj = Object.create(null);

    obj.value = file.uuid;
    obj.comment = longComment(file);

    return obj;
}

function pbxCopyFilesBuildPhaseObj(obj, folderType, subfolderPath, phaseName) {

     // Add additional properties for 'CopyFiles' build phase
    var DESTINATION_BY_TARGETTYPE = {
        application: 'wrapper',
        app_extension: 'plugins',
        bundle: 'wrapper',
        command_line_tool: 'wrapper',
        dynamic_library: 'products_directory',
        framework: 'shared_frameworks',
        frameworks: 'frameworks',
        static_library: 'products_directory',
        unit_test_bundle: 'wrapper',
        watch_app: 'wrapper',
        watch_extension: 'plugins'
    }
    var SUBFOLDERSPEC_BY_DESTINATION = {
        absolute_path: 0,
        executables: 6,
        frameworks: 10,
        java_resources: 15,
        plugins: 13,
        products_directory: 16,
        resources: 7,
        shared_frameworks: 11,
        shared_support: 12,
        wrapper: 1,
        xpc_services: 0
    }

    obj.name = '"' + phaseName + '"';
    obj.dstPath = subfolderPath || '""';
    obj.dstSubfolderSpec = SUBFOLDERSPEC_BY_DESTINATION[DESTINATION_BY_TARGETTYPE[folderType]];

    return obj;
}

function pbxShellScriptBuildPhaseObj(obj, options, phaseName) {
    obj.name = '"' + phaseName + '"';
    obj.inputPaths = options.inputPaths || [];
    obj.outputPaths = options.outputPaths || [];
    obj.shellPath = options.shellPath;
    obj.shellScript = '"' + options.shellScript.replace(/"/g, '\\"') + '"';

    return obj;
}

function pbxBuildFileComment(file) {
    return longComment(file);
}

function pbxFileReferenceComment(file) {
    return file.basename || path.basename(file.path);
}

function pbxNativeTargetComment(target) {
    return target.name;
}

function longComment(file) {
    return f("%s in %s", file.basename, file.group);
}

// respect <group> path
function correctForPluginsPath(file, project) {
    return correctForPath(file, project, 'Plugins');
}

function correctForResourcesPath(file, project) {
    return correctForPath(file, project, 'Resources');
}

function correctForFrameworksPath(file, project) {
    return correctForPath(file, project, 'Frameworks');
}

function correctForPath(file, project, group) {
    var r_group_dir = new RegExp('^' + group + '[\\\\/]');

    if (project.pbxGroupByName(group).path)
        file.path = file.path.replace(r_group_dir, '');

    return file;
}

function searchPathForFile(file, proj) {
    var plugins = proj.pbxGroupByName('Plugins'),
        pluginsPath = plugins ? plugins.path : null,
        fileDir = path.dirname(file.path);

    if (fileDir == '.') {
        fileDir = '';
    } else {
        fileDir = '/' + fileDir;
    }

    if (file.plugin && pluginsPath) {
        return '"\\"$(SRCROOT)/' + unquote(pluginsPath) + '\\""';
    } else if (file.customFramework && file.dirname) {
        return '"\\"' + file.dirname + '\\""';
    } else {
        return '"\\"$(SRCROOT)/' + proj.productName + fileDir + '\\""';
    }
}

function nonComments(obj) {
    var keys = Object.keys(obj),
        newObj = {}, i = 0;

    for (i; i < keys.length; i++) {
        if (!COMMENT_KEY.test(keys[i])) {
            newObj[keys[i]] = obj[keys[i]];
        }
    }

    return newObj;
}

function unquote(str) {
    if (str) return str.replace(/^"(.*)"$/, "$1");
}


function buildPhaseNameForIsa (isa) {

    BUILDPHASENAME_BY_ISA = {
        PBXCopyFilesBuildPhase: 'Copy Files',
        PBXResourcesBuildPhase: 'Resources',
        PBXSourcesBuildPhase: 'Sources',
        PBXFrameworksBuildPhase: 'Frameworks'
    }

    return BUILDPHASENAME_BY_ISA[isa]
}

function producttypeForTargettype (targetType) {

    PRODUCTTYPE_BY_TARGETTYPE = {
            application: 'com.apple.product-type.application',
            app_extension: 'com.apple.product-type.app-extension',
            bundle: 'com.apple.product-type.bundle',
            command_line_tool: 'com.apple.product-type.tool',
            dynamic_library: 'com.apple.product-type.library.dynamic',
            framework: 'com.apple.product-type.framework',
            static_library: 'com.apple.product-type.library.static',
            unit_test_bundle: 'com.apple.product-type.bundle.unit-test',
            watch_app: 'com.apple.product-type.application.watchapp',
            watch_extension: 'com.apple.product-type.watchkit-extension'
        };

    return PRODUCTTYPE_BY_TARGETTYPE[targetType]
}

function filetypeForProducttype (productType) {

    FILETYPE_BY_PRODUCTTYPE = {
            'com.apple.product-type.application': '"wrapper.application"',
            'com.apple.product-type.app-extension': '"wrapper.app-extension"',
            'com.apple.product-type.bundle': '"wrapper.plug-in"',
            'com.apple.product-type.tool': '"compiled.mach-o.dylib"',
            'com.apple.product-type.library.dynamic': '"compiled.mach-o.dylib"',
            'com.apple.product-type.framework': '"wrapper.framework"',
            'com.apple.product-type.library.static': '"archive.ar"',
            'com.apple.product-type.bundle.unit-test': '"wrapper.cfbundle"',
            'com.apple.product-type.application.watchapp': '"wrapper.application"',
            'com.apple.product-type.watchkit-extension': '"wrapper.app-extension"'
        };

    return FILETYPE_BY_PRODUCTTYPE[productType]
}

pbxProject.prototype.getFirstProject = function() {

    // Get pbxProject container
    var pbxProjectContainer = this.pbxProjectSection();

    // Get first pbxProject UUID
    var firstProjectUuid = Object.keys(pbxProjectContainer)[0];

    // Get first pbxProject
    var firstProject = pbxProjectContainer[firstProjectUuid];

     return {
        uuid: firstProjectUuid,
        firstProject: firstProject
    }
}

pbxProject.prototype.getFirstTarget = function() {

    // Get first targets UUID
    var firstTargetUuid = this.getFirstProject()['firstProject']['targets'][0].value;

    // Get first pbxNativeTarget
    var firstTarget = this.pbxNativeTargetSection()[firstTargetUuid];

    return {
        uuid: firstTargetUuid,
        firstTarget: firstTarget
    }
}

/*** NEW ***/

pbxProject.prototype.addToPbxGroupType = function (file, groupKey, groupType) {
    var group = this.getPBXGroupByKeyAndType(groupKey, groupType);
    if (group && group.children !== undefined) {
        if (typeof file === 'string') {
            //Group Key
            var childGroup = {
                value:file,
            };
            if (this.getPBXGroupByKey(file)) {
                childGroup.comment = this.getPBXGroupByKey(file).name;
            }
            else if (this.getPBXVariantGroupByKey(file)) {
                childGroup.comment = this.getPBXVariantGroupByKey(file).name;
            }

            group.children.push(childGroup);
        }
        else {
            //File Object
            group.children.push(pbxGroupChild(file));
        }
    }
}

pbxProject.prototype.addToPbxVariantGroup = function (file, groupKey) {
    this.addToPbxGroupType(file, groupKey, 'PBXVariantGroup');
}

pbxProject.prototype.addToPbxGroup = function (file, groupKey) {
    this.addToPbxGroupType(file, groupKey, 'PBXGroup');
}



pbxProject.prototype.pbxCreateGroupWithType = function(name, pathName, groupType) {
    //Create object
    var model = {
        isa: '"' + groupType + '"',
        children: [],
        name: name,
        sourceTree: '"<group>"'
    };
    if (pathName) model.path = pathName;
    var key = this.generateUuid();

    //Create comment
    var commendId = key + '_comment';

    //add obj and commentObj to groups;
    var groups = this.hash.project.objects[groupType];
    if (!groups) {
        groups = this.hash.project.objects[groupType] = new Object();
    }
    groups[commendId] = name;
    groups[key] = model;

    return key;
}

pbxProject.prototype.pbxCreateVariantGroup = function(name) {
    return this.pbxCreateGroupWithType(name, undefined, 'PBXVariantGroup')
}

pbxProject.prototype.pbxCreateGroup = function(name, pathName) {
    return this.pbxCreateGroupWithType(name, pathName, 'PBXGroup');
}



pbxProject.prototype.removeFromPbxGroupAndType = function (file, groupKey, groupType) {
    var group = this.getPBXGroupByKeyAndType(groupKey, groupType);
    if (group) {
        var groupChildren = group.children, i;
        for(i in groupChildren) {
            if(pbxGroupChild(file).value == groupChildren[i].value &&
                pbxGroupChild(file).comment == groupChildren[i].comment) {
                groupChildren.splice(i, 1);
                break;
            }
        }
    }
}

pbxProject.prototype.removeFromPbxGroup = function (file, groupKey) {
    this.removeFromPbxGroupAndType(file, groupKey, 'PBXGroup');
}

pbxProject.prototype.removeFromPbxVariantGroup = function (file, groupKey) {
    this.removeFromPbxGroupAndType(file, groupKey, 'PBXVariantGroup');
}



pbxProject.prototype.getPBXGroupByKeyAndType = function(key, groupType) {
    return this.hash.project.objects[groupType][key];
};

pbxProject.prototype.getPBXGroupByKey = function(key) {
    return this.hash.project.objects['PBXGroup'][key];
};

pbxProject.prototype.getPBXVariantGroupByKey = function(key) {
    return this.hash.project.objects['PBXVariantGroup'][key];
};



pbxProject.prototype.findPBXGroupKeyAndType = function(criteria, groupType) {
    var groups = this.hash.project.objects[groupType];
    var target;

    for (var key in groups) {
        // only look for comments
        if (COMMENT_KEY.test(key)) continue;

        var group = groups[key];
        if (criteria && criteria.path && criteria.name) {
            if (criteria.path === group.path && criteria.name === group.name) {
                target = key;
                break
            }
        }
        else if (criteria && criteria.path) {
            if (criteria.path === group.path) {
                target = key;
                break
            }
        }
        else if (criteria && criteria.name) {
            if (criteria.name === group.name) {
                target = key;
                break
            }
        }
    }

    return target;
}

pbxProject.prototype.findPBXGroupKey = function(criteria) {
    return this.findPBXGroupKeyAndType(criteria, 'PBXGroup');
}

pbxProject.prototype.findPBXVariantGroupKey = function(criteria) {
    return this.findPBXGroupKeyAndType(criteria, 'PBXVariantGroup');
}

pbxProject.prototype.addLocalizationVariantGroup = function(name) {
    var groupKey = this.pbxCreateVariantGroup(name);

    var resourceGroupKey = this.findPBXGroupKey({name: 'Resources'});
    this.addToPbxGroup(groupKey, resourceGroupKey);

    var localizationVariantGroup = {
        uuid: this.generateUuid(),
        fileRef: groupKey,
        basename: name
    }
    this.addToPbxBuildFileSection(localizationVariantGroup);        // PBXBuildFile
    this.addToPbxResourcesBuildPhase(localizationVariantGroup);     //PBXResourcesBuildPhase

    return localizationVariantGroup;
};

pbxProject.prototype.addKnownRegion = function (name) {
  if (!this.pbxProjectSection()[this.getFirstProject()['uuid']]['knownRegions']) {
    this.pbxProjectSection()[this.getFirstProject()['uuid']]['knownRegions'] = [];
  }
  if (!this.hasKnownRegion(name)) {
    this.pbxProjectSection()[this.getFirstProject()['uuid']]['knownRegions'].push(name);
  }
}

pbxProject.prototype.removeKnownRegion = function (name) {
  var regions = this.pbxProjectSection()[this.getFirstProject()['uuid']]['knownRegions'];
  if (regions) {
    for (var i = 0; i < regions.length; i++) {
      if (regions[i] === name) {
        regions.splice(i, 1);
        break;
      }
    }
    this.pbxProjectSection()[this.getFirstProject()['uuid']]['knownRegions'] = regions;
  }
}

pbxProject.prototype.hasKnownRegion = function (name) {
  var regions = this.pbxProjectSection()[this.getFirstProject()['uuid']]['knownRegions'];
  if (regions) {
    for (var i in regions) {
      if (regions[i] === name) {
        return true;
      }
    }
  }
  return false;
}

pbxProject.prototype.getPBXObject = function(name) {
    return this.hash.project.objects[name];
}



pbxProject.prototype.addFile = function (path, group, opt) {
    var file = new pbxFile(path, opt);

    // null is better for early errors
    if (this.hasFile(file.path)) return null;

    file.fileRef = this.generateUuid();

    this.addToPbxFileReferenceSection(file);    // PBXFileReference

    if (this.getPBXGroupByKey(group)) {
        this.addToPbxGroup(file, group);        // PBXGroup
    }
    else if (this.getPBXVariantGroupByKey(group)) {
        this.addToPbxVariantGroup(file, group);            // PBXVariantGroup
    }

    return file;
}

pbxProject.prototype.removeFile = function (path, group, opt) {
    var file = new pbxFile(path, opt);

    this.removeFromPbxFileReferenceSection(file);    // PBXFileReference

    if (this.getPBXGroupByKey(group)) {
        this.removeFromPbxGroup(file, group);            // PBXGroup
    }
    else if (this.getPBXVariantGroupByKey(group)) {
        this.removeFromPbxVariantGroup(file, group);     // PBXVariantGroup
    }

    return file;
}



pbxProject.prototype.getBuildProperty = function(prop, build) {
    var target;
    var configs = this.pbxXCBuildConfigurationSection();
    for (var configName in configs) {
        if (!COMMENT_KEY.test(configName)) {
            var config = configs[configName];
            if ( (build && config.name === build) || (build === undefined) ) {
                if (config.buildSettings[prop] !== undefined) {
                    target = config.buildSettings[prop];
                }
            }
        }
    }
    return target;
}

pbxProject.prototype.getBuildConfigByName = function(name) {
    var target = {};
    var configs = this.pbxXCBuildConfigurationSection();
    for (var configName in configs) {
        if (!COMMENT_KEY.test(configName)) {
            var config = configs[configName];
            if (config.name === name)  {
                target[configName] = config;
            }
        }
    }
    return target;
}

pbxProject.prototype.addDataModelDocument = function(filePath, group, opt) {
    if (!group) {
        group = 'Resources';
    }
    if (!this.getPBXGroupByKey(group)) {
        group = this.findPBXGroupKey({ name: group });
    }

    var file = new pbxFile(filePath, opt);

    if (!file || this.hasFile(file.path)) return null;

    file.fileRef = this.generateUuid();
    this.addToPbxGroup(file, group);

    if (!file) return false;

    file.target = opt ? opt.target : undefined;
    file.uuid = this.generateUuid();

    this.addToPbxBuildFileSection(file);
    this.addToPbxSourcesBuildPhase(file);

    file.models = [];
    var currentVersionName;
    var modelFiles = fs.readdirSync(file.path);
    for (var index in modelFiles) {
        var modelFileName = modelFiles[index];
        var modelFilePath = path.join(filePath, modelFileName);

        if (modelFileName == '.xccurrentversion') {
            currentVersionName = plist.readFileSync(modelFilePath)._XCCurrentVersionName;
            continue;
        }

        var modelFile = new pbxFile(modelFilePath);
        modelFile.fileRef = this.generateUuid();

        this.addToPbxFileReferenceSection(modelFile);

        file.models.push(modelFile);

        if (currentVersionName && currentVersionName === modelFileName) {
            file.currentModel = modelFile;
        }
    }

    if (!file.currentModel) {
        file.currentModel = file.models[0];
    }

    this.addToXcVersionGroupSection(file);

    return file;
}

pbxProject.prototype.addTargetAttribute = function(prop, value, target) {
    var attributes = this.getFirstProject()['firstProject']['attributes'];
    if (attributes['TargetAttributes'] === undefined) {
        attributes['TargetAttributes'] = {};
    }
    target = target || this.getFirstTarget();
    if (attributes['TargetAttributes'][target.uuid] === undefined) {
      attributes['TargetAttributes'][target.uuid] = {};
    }
    attributes['TargetAttributes'][target.uuid][prop] = value;
}

pbxProject.prototype.removeTargetAttribute = function(prop, target) {
    var attributes = this.getFirstProject()['firstProject']['attributes'];
    target = target || this.getFirstTarget();
    if (attributes['TargetAttributes'] &&
        attributes['TargetAttributes'][target.uuid]) {
        delete attributes['TargetAttributes'][target.uuid][prop];
    }
}

module.exports = pbxProject;