const gulp = require('gulp');
const fs = require('fs');
const { merge } = require('webpack-merge');
const gutil = require('gulp-util');
const $ = require('gulp-load-plugins')();
const generate = require('./CI/generate');
const serve = require('./CI/serve');
const webpackConfig = require('./CI/webpack.config');
const webpackSingleConfig = require('./CI/webpack.single.config');
const { webpackTaskFactory, findEntryMap } = require('./CI/utils');
require('./CI/ajaxgen');
require('./localeTool/gulplang');
const isProduction = process.env.NODE_ENV === 'production';

/** 生成 html 入口模板 */
gulp.task('generate-mainweb', done => {
  generate(done);
  done();
});

/** 前端 server 服务 */
gulp.task('server', done => {
  serve({ done });
});

/** 前端 server 服务 */
gulp.task('server:production', done => {
  serve({ isProduction: true, done });
});

/** webpack 构建任务 */
gulp.task(
  'webpack',
  webpackTaskFactory(merge(webpackConfig, { entry: findEntryMap(isProduction ? 'index' : undefined) }), false),
);
gulp.task('webpack:watch', webpackTaskFactory(merge(webpackConfig, { entry: findEntryMap() }), true));
gulp.task(
  'singleEntryWebpack',
  webpackTaskFactory(merge(webpackSingleConfig, { entry: findEntryMap('single') }), false),
);
function pipeAll(pipes, done) {
  const length = pipes.length;
  let count = 0;
  pipes.forEach(p => {
    p.on('end', () => {
      count += 1;
      if (count === length) {
        done();
      }
    });
  });
}

async function copy(done) {
  pipeAll(
    [
      gulp.src(['src/library/**/*']).pipe(gulp.dest('./build/files/staticfiles/library')),
      gulp.src(['src/common/mdcss/**/*']).pipe(gulp.dest('./build/files/staticfiles/mdcss')),
      gulp.src(['src/common/mdjs/**/*']).pipe(gulp.dest('./build/files/staticfiles/mdjs')),
      gulp.src(['src/pages/Admin/**/*.png']).pipe(gulp.dest('./build/files/staticfiles/components/Admin')),
      gulp.src(['src/components/pay/**/*']).pipe(gulp.dest('./build/files/staticfiles/components/pay')),
      gulp.src(['src/components/upgrade/**/*']).pipe(gulp.dest('./build/files/staticfiles/components/upgrade')),
      gulp.src(['src/components/images/**/*']).pipe(gulp.dest('./build/files/staticfiles/components/images')),
      gulp.src(['staticfiles/**/*']).pipe(gulp.dest('./build/files/staticfiles')),
      gulp.src(['staticfiles/html/**/*']).pipe(gulp.dest('./build/files')),
      gulp.src(['locale/en/*.js']).pipe(gulp.dest('./build/files/staticfiles/lang/en')),
      gulp.src(['locale/zh-Hant/*.js']).pipe(gulp.dest('./build/files/staticfiles/lang/zh-Hant')),
    ],
    done,
  );
}

gulp.task('copy', done => {
  console.log('正在删除老文件');
  gulp
    .src(['./build/files/staticfiles/*'])
    .pipe($.clean({ force: true }))
    .on('finish', () => {
      console.log('正在复制静态资源');
      copy(() => {
        console.log('复制完成');
        done();
      });
    });
});

/** 清理 build 文件夹 */
gulp.task('clean-build', done => {
  gulp.src(['./build*']).pipe($.clean({ force: true }));
  done();
});

/** 本地方法命令 */
gulp.task('watch', gulp.series('webpack:watch'));

gulp.task('dev:main', done => {
  const devWatchTasks = ['webpack:watch'];
  const devServeTasks = ['generate-mainweb', 'copy', 'server'];
  let devTasks;
  // 输出文件存在时先启服务后构建，否则先构建后启服务
  if (
    !(
      fs.existsSync('./build/dist/pack') &&
      fs.existsSync('./build/files') &&
      fs.existsSync('./build/dist/manifest.json')
    )
  ) {
    console.log(gutil.colors.red('\n本地未找到构建好的文件，将在构建完成后启动服务。\n'));
    devTasks = devWatchTasks.concat(devServeTasks);
  } else {
    devTasks = devServeTasks.concat(devWatchTasks);
  }
  gulp.series.apply(
    null,
    devTasks.concat(function lastdone(alldone) {
      alldone();
      done();
    }),
  )();
});

/** 构建 ->  webpack 编译 js 代码，生成至 ./build/dist */
gulp.task('release', gulp.series('clean-build', 'webpack', 'singleEntryWebpack'));

/** 清理 sourceMap, LICENSE 文件 */
gulp.task('clean-file', done => {
  gulp.src(['./build/**/*.map', './build/**/*.LICENSE.txt']).pipe($.clean({ force: true }));
  done();
});

/** 发布 ->
 * 1. 替换编译后的 js 代码里的服务端地址
 * 2. 按发布环境生成主站内的入口文件
 * 3. 按发布环境生成静态页面文件
 * 4. 拷贝静态资源
 */
gulp.task('publish', publishdone => {
  if (!(fs.existsSync('./build/dist/pack') && fs.existsSync('./build/dist/manifest.json'))) {
    console.log(gutil.colors.red('publish 失败💀'));
    console.log('dist 文件不存在，请先执行 release 操作');
    return;
  }
  gulp.series('clean-file', 'generate-mainweb', 'copy', function log(done) {
    done();
    publishdone();
    console.log(gutil.colors.green('publish 成功 🎉'));
  })();
});