var gulp = require('gulp');
var $ = require('gulp-load-plugins')();
var path = require('path');
var del = require('del');
var exec = require('child_process').exec;

var distPath = path.resolve('./dist');
var version = ''; // 版本号
var versionPath = ''; // 版本号路径
var env = 'prod'; // 运行环境

// 创建版本号(年月日时分)
(function (cb) {
  var d = new Date();
  var yy = d.getFullYear().toString().slice(2);
  var MM = d.getMonth() + 1 >= 10 ? (d.getMonth() + 1) : '0' + (d.getMonth() + 1);
  var DD = d.getDate() >= 10 ? d.getDate() : '0' + d.getDate();
  var h = d.getHours() >= 10 ? d.getHours() : '0' + d.getHours();
  var mm = d.getMinutes() >= 10 ? d.getMinutes() : '0' + d.getMinutes();
  version = yy + MM + DD + h + mm;
  versionPath = distPath + '/' + version;
})();

// 编译
gulp.task('build', function (cb) {
  exec('node build/build.js', () => cb())
});

// 创建版本号目录
gulp.task('create:versionCatalog', function (cb) {
  gulp.src(`${distPath}/static/**/*`)
    .pipe(gulp.dest(`${versionPath}/static/`)).on('end', () => cb())
});

// 替换${versionPath}/static/js/manifest.js window.SITE_CONFIG.cdnUrl占位变量
gulp.task('replace:cdnUrl', function (cb) {
  gulp.src(`${versionPath}/static/js/manifest.js`)
    .pipe($.replace(new RegExp(`"${require('./config').build.assetsPublicPath}"`, 'g'), 'window.SITE_CONFIG.cdnUrl + "/"'))
    .pipe(gulp.dest(`${versionPath}/static/js/`)).on('end', () => cb())
});

// 替换${versionPath}/static/config/index-${env}.js window.SITE_CONFIG['version']配置变量
gulp.task('replace:version', function (cb) {
  gulp.src(`${versionPath}/static/config/index-${env}.js`)
    .pipe($.replace(/window.SITE_CONFIG\['version'\] = '.*'/g, `window.SITE_CONFIG['version'] = '${version}'`))
    .pipe(gulp.dest(`${versionPath}/static/config/`)).on('end', () => cb())
});

// 合并${versionPath}/static/config/[index-${env}, init].js 至 ${distPath}/config/index.js
gulp.task('concat:config', function (cb) {
  gulp.src([`${versionPath}/static/config/index-${env}.js`, `${versionPath}/static/config/init.js`])
    .pipe($.concat('index.js'))
    .pipe(gulp.dest(`${distPath}/config/`)).on('end', () => cb())
});

// 清空
gulp.task('clean', function (cb) {
  del([versionPath])
});

gulp.task('default', gulp.series('build', gulp.series('create:versionCatalog', 'replace:cdnUrl', 'replace:version', 'concat:config'), function (cb) {
  del([`${distPath}/static`, `${versionPath}/static/config`])
  cb()
}));