/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

/*jshint node: true*/

var Q     = require('q'),
    path  = require('path'),
    shell = require('shelljs'),
    spawn = require('./spawn'),
    fs = require('fs'),
    plist = require('plist'),
    util = require('util');

var check_reqs;
try {
    check_reqs = require('./check_reqs');
} catch (err) {
    // For unit tests, check_reqs.js is not a sibling to build.js
    check_reqs = require('../../../../lib/check_reqs');
}

var events = require('cordova-common').events;

var projectPath = path.join(__dirname, '..', '..');
var projectName = null;

// These are regular expressions to detect if the user is changing any of the built-in xcodebuildArgs
var buildFlagMatchers = {
    'xcconfig' : /^\-xcconfig\s*(.*)$/,
    'workspace' : /^\-workspace\s*(.*)/,
    'scheme' : /^\-scheme\s*(.*)/,
    'configuration' : /^\-configuration\s*(.*)/,
    'sdk' : /^\-sdk\s*(.*)/,
    'destination' : /^\-destination\s*(.*)/,
    'archivePath' : /^\-archivePath\s*(.*)/,
    'configuration_build_dir' : /^(CONFIGURATION_BUILD_DIR=.*)/,
    'shared_precomps_dir' : /^(SHARED_PRECOMPS_DIR=.*)/
};

/**
 * Returns a promise that resolves to the default simulator target; the logic here
 * matches what `cordova emulate ios` does. 
 * 
 * The return object has two properties: `name` (the Xcode destination name),
 * `identifier` (the simctl identifier), and `simIdentifier` (essentially the cordova emulate target)
 * 
 * @return {Promise}
 */
function getDefaultSimulatorTarget() {
    return require('./list-emulator-build-targets').run()
    .then(function (emulators) {
        var targetEmulator;
        if (emulators.length > 0) {
            targetEmulator = emulators[0];
        }
        emulators.forEach(function (emulator) {
            if (emulator.name.indexOf('iPhone') === 0) {
                targetEmulator = emulator;
            }
        });
        return targetEmulator;
    });
}

module.exports.run = function (buildOpts) {
    var emulatorTarget = '';

    buildOpts = buildOpts || {};

    if (buildOpts.debug && buildOpts.release) {
        return Q.reject('Cannot specify "debug" and "release" options together.');
    }

    if (buildOpts.device && buildOpts.emulator) {
        return Q.reject('Cannot specify "device" and "emulator" options together.');
    }

    if(buildOpts.buildConfig) {
        if(!fs.existsSync(buildOpts.buildConfig)) {
            return Q.reject('Build config file does not exist:' + buildOpts.buildConfig);
        }
        events.emit('log','Reading build config file:', path.resolve(buildOpts.buildConfig));
        var contents = fs.readFileSync(buildOpts.buildConfig, 'utf-8');
        var buildConfig = JSON.parse(contents.replace(/^\ufeff/, '')); // Remove BOM
        if(buildConfig.ios) {
            var buildType = buildOpts.release ? 'release' : 'debug';
            var config = buildConfig.ios[buildType];
            if(config) {
                ['codeSignIdentity', 'codeSignResourceRules', 'provisioningProfile', 'developmentTeam', 'packageType', 'buildFlag'].forEach(
                    function(key) {
                        buildOpts[key] = buildOpts[key] || config[key];
                    });
            }
        }
    }

return require('./list-devices').run()
   .then(function (devices) {
        if (devices.length > 0 && !(buildOpts.emulator)) {
            // we also explicitly set device flag in options as we pass
            // those parameters to other api (build as an example)
            buildOpts.device = true;
            return check_reqs.check_ios_deploy();
        }
    }).then(function () {
        // CB-12287: Determine the device we should target when building for a simulator
        if (!buildOpts.device) {
            var promise;
            if (buildOpts.target) {
                // a target was given to us, find the matching Xcode destination name
                promise = require('./list-emulator-build-targets').targetForSimIdentifier(buildOpts.target);
            } else {
                // no target provided, pick a default one (matching our emulator logic)
                promise = getDefaultSimulatorTarget();
            }
            return promise.then(function(theTarget) { 
                emulatorTarget = theTarget.name;
                events.emit('log', 'Building for ' + emulatorTarget + ' Simulator');
            });
        }
    }).then(function () {
        return check_reqs.run();
    }).then(function () {
        return findXCodeProjectIn(projectPath);
    }).then(function (name) {
        projectName = name;
        var extraConfig = '';
        if (buildOpts.codeSignIdentity) {
            extraConfig += 'CODE_SIGN_IDENTITY = ' + buildOpts.codeSignIdentity + '\n';
            extraConfig += 'CODE_SIGN_IDENTITY[sdk=iphoneos*] = ' + buildOpts.codeSignIdentity + '\n';
        }
        if (buildOpts.codeSignResourceRules) {
            extraConfig += 'CODE_SIGN_RESOURCE_RULES_PATH = ' + buildOpts.codeSignResourceRules + '\n';
        }
        if (buildOpts.provisioningProfile) {
            extraConfig += 'PROVISIONING_PROFILE = ' + buildOpts.provisioningProfile + '\n';
        }
        if (buildOpts.developmentTeam) {
            extraConfig += 'DEVELOPMENT_TEAM = ' + buildOpts.developmentTeam + '\n';
        }
        return Q.nfcall(fs.writeFile, path.join(__dirname, '..', 'build-extras.xcconfig'), extraConfig, 'utf-8');
    }).then(function () {
        var configuration = buildOpts.release ? 'Release' : 'Debug';

        events.emit('log','Building project: ' + path.join(projectPath, projectName + '.xcworkspace'));
        events.emit('log','\tConfiguration: ' + configuration);
        events.emit('log','\tPlatform: ' + (buildOpts.device ? 'device' : 'emulator'));

        var buildOutputDir = path.join(projectPath, 'build', (buildOpts.device ? 'device' : 'emulator'));

        // remove the build/device folder before building
        return spawn('rm', [ '-rf', buildOutputDir ], projectPath)
        .then(function() {
            var xcodebuildArgs = getXcodeBuildArgs(projectName, projectPath, configuration, buildOpts.device, buildOpts.buildFlag, emulatorTarget);
            return spawn('xcodebuild', xcodebuildArgs, projectPath);
        });

    }).then(function () {
        if (!buildOpts.device || buildOpts.noSign) {
            return;
        }

        var exportOptions = {'compileBitcode': false, 'method': 'development'};

        if (buildOpts.packageType) {
            exportOptions.method = buildOpts.packageType;
        }

        if (buildOpts.developmentTeam) {
            exportOptions.teamID = buildOpts.developmentTeam;
        }

        var exportOptionsPlist = plist.build(exportOptions);
        var exportOptionsPath = path.join(projectPath, 'exportOptions.plist');

        var buildOutputDir = path.join(projectPath, 'build', 'device');


        function checkSystemRuby() {
          var ruby_cmd = shell.which('ruby');

          if (ruby_cmd != '/usr/bin/ruby') {
            events.emit('warn', 'Non-system Ruby in use. This may cause packaging to fail.\n' +
              'If you use RVM, please run `rvm use system`.\n' +
              'If you use chruby, please run `chruby system`.');
          }
        }

        function packageArchive() {
          var xcodearchiveArgs = getXcodeArchiveArgs(projectName, projectPath, buildOutputDir, exportOptionsPath);
          return spawn('xcodebuild', xcodearchiveArgs, projectPath);
        }

        return Q.nfcall(fs.writeFile, exportOptionsPath, exportOptionsPlist, 'utf-8')
                .then(checkSystemRuby)
                .then(packageArchive);
    });
};

/**
 * Searches for first XCode project in specified folder
 * @param  {String} projectPath Path where to search project
 * @return {Promise}            Promise either fulfilled with project name or rejected
 */
function findXCodeProjectIn(projectPath) {
    // 'Searching for Xcode project in ' + projectPath);
    var xcodeProjFiles = shell.ls(projectPath).filter(function (name) {
        return path.extname(name) === '.xcodeproj';
    });

    if (xcodeProjFiles.length === 0) {
        return Q.reject('No Xcode project found in ' + projectPath);
    }
    if (xcodeProjFiles.length > 1) {
        events.emit('warn','Found multiple .xcodeproj directories in \n' +
            projectPath + '\nUsing first one');
    }

    var projectName = path.basename(xcodeProjFiles[0], '.xcodeproj');
    return Q.resolve(projectName);
}

module.exports.findXCodeProjectIn = findXCodeProjectIn;

/**
 * Returns array of arguments for xcodebuild
 * @param  {String}  projectName    Name of xcode project
 * @param  {String}  projectPath    Path to project file. Will be used to set CWD for xcodebuild
 * @param  {String}  configuration  Configuration name: debug|release
 * @param  {Boolean} isDevice       Flag that specify target for package (device/emulator)
 * @param  {Array}   buildFlags
 * @param  {String}  emulatorTarget Target for emulator (rather than default)
 * @return {Array}                  Array of arguments that could be passed directly to spawn method
 */
function getXcodeBuildArgs(projectName, projectPath, configuration, isDevice, buildFlags, emulatorTarget) {
    var xcodebuildArgs;
    var options;
    var buildActions;
    var settings;
    var customArgs = {};
    customArgs.otherFlags = [];

    if (buildFlags) {
        if (typeof buildFlags === 'string' || buildFlags instanceof String) {
            parseBuildFlag(buildFlags, customArgs);
        } else { // buildFlags is an Array of strings
            buildFlags.forEach( function(flag) {
                parseBuildFlag(flag, customArgs);
            });
        }
    }
    
    if (isDevice) {
        options = [
            '-xcconfig', customArgs.xcconfig || path.join(__dirname, '..', 'build-' + configuration.toLowerCase() + '.xcconfig'),
            '-workspace',  customArgs.workspace || projectName + '.xcworkspace',
            '-scheme', customArgs.scheme || projectName,
            '-configuration', customArgs.configuration || configuration,
            '-destination', customArgs.destination || 'generic/platform=iOS',
            '-archivePath', customArgs.archivePath || projectName + '.xcarchive'
        ];
        buildActions = [ 'archive' ];
        settings = [
            customArgs.configuration_build_dir || 'CONFIGURATION_BUILD_DIR=' + path.join(projectPath, 'build', 'device'),
            customArgs.shared_precomps_dir || 'SHARED_PRECOMPS_DIR=' + path.join(projectPath, 'build', 'sharedpch')
        ];
        // Add other matched flags to otherFlags to let xcodebuild present an appropriate error.
        // This is preferable to just ignoring the flags that the user has passed in.
        if (customArgs.sdk) {
            customArgs.otherFlags = customArgs.otherFlags.concat(['-sdk', customArgs.sdk]);
        }
    } else { // emulator
        options = [
            '-xcconfig', customArgs.xcconfig || path.join(__dirname, '..', 'build-' + configuration.toLowerCase() + '.xcconfig'),
            '-workspace', customArgs.project || projectName + '.xcworkspace',
            '-scheme', customArgs.scheme || projectName,
            '-configuration', customArgs.configuration || configuration,
            '-sdk', customArgs.sdk || 'iphonesimulator',
            '-destination', customArgs.destination || 'platform=iOS Simulator,name=' + emulatorTarget
        ];
        buildActions = [ 'build' ];
        settings = [
            customArgs.configuration_build_dir || 'CONFIGURATION_BUILD_DIR=' + path.join(projectPath, 'build', 'emulator'),
            customArgs.shared_precomps_dir || 'SHARED_PRECOMPS_DIR=' + path.join(projectPath, 'build', 'sharedpch')
        ];
        // Add other matched flags to otherFlags to let xcodebuild present an appropriate error.
        // This is preferable to just ignoring the flags that the user has passed in.
        if (customArgs.archivePath) {
            customArgs.otherFlags = customArgs.otherFlags.concat(['-archivePath', customArgs.archivePath]);
        }
    }
    xcodebuildArgs = options.concat(buildActions).concat(settings).concat(customArgs.otherFlags);
    return xcodebuildArgs;
}


/**
 * Returns array of arguments for xcodebuild
 * @param  {String}  projectName        Name of xcode project
 * @param  {String}  projectPath        Path to project file. Will be used to set CWD for xcodebuild
 * @param  {String}  outputPath         Output directory to contain the IPA
 * @param  {String}  exportOptionsPath  Path to the exportOptions.plist file
 * @return {Array}                      Array of arguments that could be passed directly to spawn method
 */
function getXcodeArchiveArgs(projectName, projectPath, outputPath, exportOptionsPath) {
  return [
    '-exportArchive',
    '-archivePath', projectName + '.xcarchive',
    '-exportOptionsPlist', exportOptionsPath,
    '-exportPath', outputPath
  ];
}

function parseBuildFlag(buildFlag, args) {
    var matched;
    for (var key in buildFlagMatchers) {
        var found = buildFlag.match(buildFlagMatchers[key]);
        if (found) {
            matched = true;
            // found[0] is the whole match, found[1] is the first match in parentheses.
            args[key] = found[1];
            events.emit('warn', util.format('Overriding xcodebuildArg: %s', buildFlag));
        }
    }

    if (!matched) {
        // If the flag starts with a '-' then it is an xcodebuild built-in option or a
        // user-defined setting. The regex makes sure that we don't split a user-defined
        // setting that is wrapped in quotes. 
        if (buildFlag[0] === '-' && !buildFlag.match(/^.*=(\".*\")|(\'.*\')$/)) {
            args.otherFlags = args.otherFlags.concat(buildFlag.split(' '));
            events.emit('warn', util.format('Adding xcodebuildArg: %s', buildFlag.split(' ')));
        } else {
            args.otherFlags.push(buildFlag);
            events.emit('warn', util.format('Adding xcodebuildArg: %s', buildFlag));
        }
    }
}

// help/usage function
module.exports.help = function help() {
    console.log('');
    console.log('Usage: build [--debug | --release] [--archs=\"<list of architectures...>\"]');
    console.log('             [--device | --simulator] [--codeSignIdentity=\"<identity>\"]');
    console.log('             [--codeSignResourceRules=\"<resourcerules path>\"]');
    console.log('             [--developmentTeam=\"<Team ID>\"]');
    console.log('             [--provisioningProfile=\"<provisioning profile>\"]');
    console.log('    --help                  : Displays this dialog.');
    console.log('    --debug                 : Builds project in debug mode. (Default)');
    console.log('    --release               : Builds project in release mode.');
    console.log('    -r                      : Shortcut :: builds project in release mode.');
    // TODO: add support for building different archs
    // console.log("    --archs   : Builds project binaries for specific chip architectures (`anycpu`, `arm`, `x86`, `x64`).");
    console.log('    --device, --simulator');
    console.log('                            : Specifies, what type of project to build');
    console.log('    --codeSignIdentity      : Type of signing identity used for code signing.');
    console.log('    --codeSignResourceRules : Path to ResourceRules.plist.');
    console.log('    --developmentTeam       : New for Xcode 8. The development team (Team ID)');
    console.log('                              to use for code signing.');
    console.log('    --provisioningProfile   : UUID of the profile.');
    console.log('    --device --noSign       : Builds project without application signing.');
    console.log('');
    console.log('examples:');
    console.log('    build ');
    console.log('    build --debug');
    console.log('    build --release');
    console.log('    build --codeSignIdentity="iPhone Distribution" --provisioningProfile="926c2bd6-8de9-4c2f-8407-1016d2d12954"');
    // TODO: add support for building different archs
    // console.log("    build --release --archs=\"armv7\"");
    console.log('');
    process.exit(0);
};
