/**
    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.
*/
var cordova_util      = require('./util'),
    path              = require('path'),
    shell             = require('shelljs'),
    config_parser     = require('./config_parser'),
    platforms         = require('../platforms'),
    platform          = require('./platform'),
    events            = require('./events'),
    prepare           = require('./prepare'),
    fs                = require('fs'),
    ls                = fs.readdirSync,
    n                 = require('ncallbacks'),
    hooker            = require('../src/hooker'),
    util              = require('util');

function shell_out_to_emulate(root, platform, done) {
    var cmd = '"' + path.join(root, 'platforms', platform, 'cordova', 'run') + '" --emulator';
    // TODO: inconsistent API for BB10 run command
    if (platform == 'blackberry') {
        var bb_project = path.join(root, 'platforms', 'blackberry')
        var project = new platforms.blackberry.parser(bb_project);
        if (project.has_simulator_target()) {
            var bb_config = project.get_cordova_config();
            var sim = project.get_simulator_targets()[0].name;
            cmd = '"' + path.join(bb_project, 'cordova', 'run') + '" --target=' + sim + ' -k ' + bb_config.signing_password;
        } else {
            throw new Error('No BlackBerry simulator targets defined. If you want to run emulate with BB10, please add a simulator target. For more information run "' + path.join(bb_project, 'cordova', 'target') + '" -h');
        }
    }
    events.emit('log', 'Running on emulator for platform "' + platform + '" via command "' + cmd + '" (output to follow)...');
    shell.exec(cmd, {silent:true, async:true}, function(code, output) {
        events.emit('log', output);
        if (code > 0) {
            throw new Error('An error occurred while emulating/deploying the ' + platform + ' project.' + output);
        } else {
            events.emit('log', 'Platform "' + platform + '" deployed to emulator.');
            done();
        }
    });
}

module.exports = function emulate (platformList, callback) {
    var projectRoot = cordova_util.isCordova(process.cwd());

    if (!projectRoot) {
        var err = new Error('Current working directory is not a Cordova-based project.');
        if (callback) callback(err);
        else throw err;
        return;
    }

    var xml = cordova_util.projectConfig(projectRoot);
    var cfg = new config_parser(xml);

    if (arguments.length === 0 || (platformList instanceof Array && platformList.length === 0)) {
        platformList = cordova_util.listPlatforms(projectRoot);
    } else if (typeof platformList == 'string') platformList = [platformList];
    else if (platformList instanceof Function && callback === undefined) {
        callback = platformList;
        platformList = cordova_util.listPlatforms(projectRoot);
    }

    if (platformList.length === 0) {
        var err = new Error('No platforms added to this project. Please use `cordova platform add <platform>`.');
        if (callback) callback(err);
        else throw err;
        return;
    }
    var opts = {
        platforms:platformList
    };

    var hooks = new hooker(projectRoot);
    hooks.fire('before_emulate', opts, function(err) {
        if (err) {
            if (callback) callback(err);
            else throw err;
        } else {
            var end = n(platformList.length, function() {
                hooks.fire('after_emulate', opts, function(err) {
                    if (err) {
                        if (callback) callback(err);
                        else throw err;
                    } else {
                        if (callback) callback();
                    }
                });
            });

            // Run a prepare first!
            prepare(platformList, function(err) {
                if (err) {
                    if (callback) callback(err);
                    else throw err;
                } else {
                    platformList.forEach(function(platform) {
                        try {
                            shell_out_to_emulate(projectRoot, platform, end);
                        } catch(e) {
                            if (callback) callback(e);
                            else throw e;
                        }
                    });
                }
            });
        }
    });
};