const gulp = require('gulp');
const path = require('path');
const os = require('os');
const fs = require('fs');
const fse = require('fs-extra');
const Haxe = require('./haxe');
const FlashPlayer = require('./flashplayer');
const Android = require('./android');
const Neko = require('./neko');
const Env = require('./env');
const debug = require('./debug');
const webserver = require('gulp-webserver');
const run = require('../run/index');
const tail = require('./tail');
const exec = require('./exec');
const deb = require('gulp-debian');
const {BuildSystem, Platform, Config} = require('./core');
const vfs = require('vinyl-fs');
const rename = require('gulp-rename');
const template = require('lodash.template');


const streamToPromise = (stream) => {
    return new Promise((resolve, reject) => {
        stream.on("end", resolve);
        stream.on("error", reject);
    });
};


/**
 *
 */
class Target {

    constructor(config, platform) {
        this.config = config;
        this.platform = platform;
        this.target = 'target';
    }

    prepare() {
        return Promise.resolve();
    }

    call() {
        throw 'Not Implemented';
    }

    get targetPath() {
        return path.resolve(this.target, this.config.name, this.platform);
    }
}

/**
 *
 */
class Builder extends Target {

    constructor(config, platform, buildSystem, debug) {
        super(config, platform);
        this.buildSystem = buildSystem;
        this.debug = debug;
    }

    static register(buildSystem, builder) {
        Builder.factory[buildSystem] = builder;
    }

    static new(config, platform, buildSystem, debug) {
        return new Builder.factory[buildSystem](config, platform, buildSystem, debug);
    }
}

Builder.factory = {};

/**
 *
 */
class HaxeBuilder extends Builder {

    constructor(config, platform, buildSystem, debug) {
        super(config, platform, buildSystem, debug);
        this.haxe = new Haxe();
        this.android = new Android();
    }

    prepare() {
        let result = this.haxe.prepare().then(() => this.haxe.install(this.config.libs));
        if (this.buildSystem === BuildSystem.OPENFL) {
            if (this.platform === Platform.ANDROID) {
                result = result
                    .then(() => this.android.prepare())
                    .then(() => this.android.activate())
                    .then(() => this.android.sdkmanager([
                        'tools',
                        'platform-tools',
                        'build-tools;27.0.3',
                        //'platforms;android-19',
                        'platforms;android-26',
                        //'ndk-bundle',
                        'lldb;3.1',
                        'cmake;3.6.4111459',
                    ]));
                const AndroidSDK = this.android.android_home;
                const AndroidNDK = this.android.ndk_home;
                const answer = `echo "${[AndroidSDK, AndroidNDK].join('\n')}"`;
                result = result.then(() => {
                    return exec('.', [answer, '|', this.haxe.haxelibBin, 'run', 'openfl', 'setup', this.platform].join(' '));
                });
            }
        }
        return result;
    }

    call() {
        const target = this.targetPath;
        switch (this.buildSystem) {
            case BuildSystem.OPENFL:
                return this.haxe.openfl('build', this.platform, this.config, this.debug)
                    .then(result => streamToPromise(result.pipe(vfs.dest(target))));
            case BuildSystem.HAXE:
                return this.haxe.build(this.platform, this.config, this.debug)
                    .then(result => streamToPromise(result.pipe(vfs.dest(target))));
        }
    }
}

Builder.register(BuildSystem.HAXE, HaxeBuilder);
Builder.register(BuildSystem.OPENFL, HaxeBuilder);

/**
 *
 */
class Packer extends Target {

    call() {
        throw 'Not Implemented';
    }

    static register(platform, name, packer) {
        if (!Packer.factory[platform]) Packer.factory[platform] = {};
        Packer.factory[platform][name] = packer;
    }

    static new(config, platform, name) {
        return new Packer.factory[platform][name](config);
    }
}

Packer.factory = {};

/**
 *
 */
class FlashHTMLPacker extends Packer {

    constructor(config) {
        super(config, Platform.FLASH);
    }

    call() {
        const target = this.targetPath;
        const indexTemplate = template(fs.readFileSync(path.resolve(__dirname, '..', 'template/flash/index.html')));
        const index = indexTemplate(this.config);
        fs.writeFileSync(path.resolve(target, 'index.html'), index);
        fs.copyFileSync(path.resolve(__dirname, '..', 'template/flash/swf.js'), path.resolve(target, 'swf.js'));
        return Promise.resolve();
    }
}

FlashHTMLPacker.NAME = 'html';

Packer.register(Platform.FLASH, FlashHTMLPacker.NAME, FlashHTMLPacker);

/**
 *
 */
class LinuxDEBPacker extends Packer {

    constructor(config) {
        super(config, Platform.LINUX);
    }

    call() {
        const target = this.targetPath;
        const buildDir = path.join(os.tmpdir(), 'build', this.config.name, 'debian');
        const iconfile = `${this.config.meta.filename}${path.extname(this.config.meta.icon)}`;
        const desktopTemplate = template(fs.readFileSync(path.resolve(__dirname, '..', 'template/linux/app.desktop')));
        const desktop = desktopTemplate(Object.assign({iconfile:iconfile}, this.config));
        fse.ensureDirSync(`${buildDir}/usr/share/applications`);
        fs.writeFileSync(`${buildDir}/usr/share/applications/${this.config.meta.filename}.desktop`, desktop);
        fse.copySync(`${target}`, `${buildDir}/usr/share/${this.config.meta.filename}/`);
        fse.copySync(this.config.meta.icon, `${buildDir}/usr/share/${this.config.meta.filename}/${iconfile}`);
        return gulp.src(`${buildDir}/*`)
            .pipe(deb({
                package: this.config.meta.filename,
                version: this.config.meta.version,
                section: 'base',
                priority: 'optional',
                architecture: 'all',
                maintainer: this.config.meta.author,
                description: this.config.meta.title,
                changelog: [],
                postinst: [
                    'if [ "$1" = "configure" ] && [ -x "`which update-menus 2>/dev/null`" ] ; then\n' +
                    '    update-menus\n' +
                    'fi'
                ],
                _target: '/',
                _out: path.join(target, '..', 'debian'),
                _clean: true,
                _verbose: false
            }));
    }
}

LinuxDEBPacker.NAME = 'deb';

Packer.register(Platform.LINUX, LinuxDEBPacker.NAME, LinuxDEBPacker);

/**
 *
 */
class Runner extends Target {

    constructor(config, platform, debug) {
        super(config, platform);
        this.debug = debug;
    }

    log(stream) {
        return stream
            .pipe(tail(debug.log))
            .pipe(rename('out.log'))
            .pipe(gulp.dest(this.targetPath));
    }

    static register(platform, runner) {
        Runner.factory[platform] = runner;
    }

    static new(config, platform, debug) {
        return new Runner.factory[platform](config, debug);
    }
}

Runner.factory = {};

/**
 *
 */
class FlashRunner extends Runner {

    constructor(config, debug) {
        super(config, Platform.FLASH, debug);
        this.player = new FlashPlayer(debug);
    }

    prepare() {
        return this.player.prepare();
    }

    call() {
        const target = this.targetPath;
        const filename = path.resolve(target, this.config.meta.filename+'.swf');
        const result = this.player.run(filename, {cwd: target, verbosity: 0});
        return this.log(result);
    }
}

Runner.register(Platform.FLASH, FlashRunner);

/**
 *
 */
class Html5Runner extends Runner {

    constructor(config, debug) {
        super(config, Platform.HTML5, debug);
    }

    call() {
        return gulp.src(this.targetPath)
            .pipe(webserver({
                // ToDo: config?
                host: '0.0.0.0', port: 3000,
                open: true,
                fallback: 'index.html'
            }));
    }
}

Runner.register(Platform.HTML5, Html5Runner);

/**
 *
 */
class LinuxRunner extends Runner {

    constructor(config, debug) {
        super(config, Platform.LINUX, debug);
    }

    call() {
        const target = this.targetPath;
        const filename = path.resolve(target, this.config.meta.filename);
        const result = gulp.src(filename).pipe(run("./<%=file.basename%>", {cwd: target, verbosity: 0}));
        return this.log(result);
    }
}

Runner.register(Platform.LINUX, LinuxRunner);
Runner.register(Platform.WINDOWS, LinuxRunner);  //ToDo:

/**
 *
 */
class NekoRunner extends Runner {

    constructor(config, debug) {
        super(config, Platform.NEKO, debug);
        this.neko = new Neko();
    }

    prepare() {
        return this.neko.prepare();
    }

    call() {
        const target = this.targetPath;
        const filename = path.resolve(target, this.config.meta.filename+'.n');
        const result = this.neko.run(filename, {cwd: target, verbosity: 0});
        return this.log(result);
    }
}

Runner.register(Platform.NEKO, NekoRunner);

/**
 *
 */
class AndroidRunner extends Runner {

    constructor(config, debug) {
        super(config, Platform.ANDROID, debug);
        this.android = new Android();
    }

    prepare() {
        return this.android.prepare();
    }

    call() {
        const target = this.targetPath;
        const filename = path.resolve(target, this.config.meta.filename+'-debug.apk');
        return this.log(gulp.src(filename)
            .pipe(this.android.apk())
            .pipe(this.android.install())
            .pipe(this.android.start())
            .pipe(this.android.logcat())
        );
    }
}

Runner.register(Platform.ANDROID, AndroidRunner);


/**
 *
 */
class Project {

    constructor(buildSystem, platforms, config, prepare) {
        this.buildSystem = buildSystem;
        this.platforms = Array.isArray(platforms) ? platforms : [platforms];
        this.config = config;
        this.prepare = prepare;
    }

    build(platform, debug) {
        const builder = Builder.new(this.config, platform, this.buildSystem, debug);
        const tasks = [builder.prepare.bind(builder)];
        if (this.prepare) tasks.push(this.prepare);
        tasks.push(builder.call.bind(builder));
        return tasks;
    }

    run(platform, debug) {
        const runner = Runner.new(this.config, platform, debug);
        return [
            runner.prepare.bind(runner),
            runner.call.bind(runner),
        ];
    }

    test(platform) {
        return this.build(platform, debug).concat(this.run(platform, debug));
    }

    pack(platform, name) {
        const packer = Packer.new(this.config, platform, name);
        return [
            packer.prepare.bind(packer),
            packer.call.bind(packer),
        ];
    }

    bind(module, external_gulp /* ToDo: spike */) {
        const _gulp = (external_gulp || gulp);
        for (const platform of this.platforms) {
            module.exports[`${this.config.name}:${platform}:build`] = _gulp.series(this.build(platform));
            if (Runner.factory[platform]) {
                module.exports[`${this.config.name}:${platform}:run`] = _gulp.series(this.run(platform));
                module.exports[`${this.config.name}:${platform}:test`] = _gulp.series(this.test(platform));
            }
            if (Packer.factory[platform]) {
                for (const name of Object.keys(Packer.factory[platform])) {
                    module.exports[`${this.config.name}:${platform}:${name}`] = _gulp.series(this.pack(platform, name));
                }
            }
        }
        return this;
    }
}

Project.BuildSystem = BuildSystem;
Project.Platform = Platform;
Project.Config = Config;
Project.Builder = Builder;
Project.Runner = Runner;


module.exports = Project;