'use strict';

var gulp = require('gulp');
var clean = require('gulp-clean');
var concat = require('gulp-concat');
var less = require('gulp-less');
var rename = require('gulp-rename');
var through = require('through2');
var path = require('path');
var exec = require('child_process').exec;
var replace = require('gulp-replace');
var uglify = require('gulp-uglify');
var shell = require('gulp-shell')
var fs = require('fs');
var distDir = "./dist";


var dependencies = require('./package.json').spm.dependencies;

// 获取包文件的路径
function getPackagePath(name) {
  var path = distDir+'/' + name + '/';

  var subDirs = fs.readdirSync(path);
  var version = subDirs[subDirs.length -1];
  return  path + version + '/';
}

/**
 * 重命名包文件的入口文件，因为入口文件有可能为index.js
 * 统一为{package}.js
 */
function renameFile() {
  var stream = through.obj(function(file, enc, callback) {

    
    var filepath = file.path.split(path.sep),
      module = filepath.slice(filepath.lastIndexOf('dist') + 1), // => [bui-{package}, version, [path,] {main.js}]
      packageName = module[0].split('-')[1],
      filename;
    if (module.length === 3) {
      filename = packageName + '.js';
    }
    else {
      filename = module.slice(2).join(path.sep).replace(/-debug.js$/, '.js');
    }

    file.path = path.join(file.base, filename);

    return callback(null, file);
  });

  return stream;
}

//清理目录
gulp.task('clean', function() {
  return gulp.src([
      './build',
      './spm_modules',
      distDir
    ], {read: false})
    .pipe(clean());
});
//获取依赖的package
gulp.task('prepare', ['clean'], function(cb){

  // exec('./node_modules/spm/bin/spm install && ./node_modules/spm/bin/spm build --with-deps && cd ./spm_modules/bui-config/*\.*\.* && ../../../node_modules/spm/bin/spm build -O ../../../dist --with-deps --include standalone', function (err, stdout, stderr) {
  //   cb(stderr);
  // });
  // 
  return gulp.src([
      './spm_modules/*/*/'
    ], {read: false})
    .pipe(shell([
      'cd <%=file.path %> && spm install && spm build -O ../../../dist'
    ]))
  
});


//生成依赖包的js文件
gulp.task('package', function(){
  var files = [];
  for(var name in dependencies){
    if(name != 'seajs'){
      files.push(getPackagePath(name, dependencies[name]) + '**/*-debug.js');
    }
  }
  return gulp.src(files)
    // 重命名包文件的js名
    .pipe(renameFile())
    // 去掉版本号和包名
    .pipe(replace(/bui-(\w+)\/\d.\d.\d\/\w+/g, 'bui/$1'))
    // require.async的时候要把bui-xxx换成bui/xxx
    .pipe(replace(/require\.async\((\'|\")bui-/g, 'require.async($1bui/'))
    // 去掉-debug的后缀
    .pipe(replace(/-debug/g, ''))
    .pipe(gulp.dest('./build'));
});

gulp.task('seed.js', ['package'], function() {
  var tmp_distDir = './spm_modules';
  return gulp.src([
      tmp_distDir + '/seajs/' + dependencies.seajs + '/dist/sea-debug.js',
      './build/config.js',
      './build/common.js'
    ])
    .pipe(concat('seed.js'))
    .pipe(gulp.dest('./build'));
});

gulp.task('bui.js', ['package'], function() {
  var tmp_distDir = './spm_modules';
  return gulp.src([
      tmp_distDir + '/seajs/' + dependencies.seajs + '/dist/sea-debug.js',
      './build/config.js',
      './build/common.js',
      './build/data.js',
      './build/list.js',
      './build/menu.js',
      './build/tab.js',
      './build/mask.js',
      './build/overlay.js',
      './build/picker.js',
      './build/toolbar.js',
      './build/calendar.js',
      './build/select.js',
      './build/form.js',
      './build/editor.js',
      './build/tooltip.js',
      './build/grid.js',
      'all.js'
    ])
    .pipe(concat('bui.js'))
    .pipe(gulp.dest('./build'));
});

// 适配kissy的js
gulp.task('adapter.js', ['package'], function() {
  var tmp_distDir = './spm_modules';
  return gulp.src([
      tmp_distDir + '/bui-adapter/' + dependencies['bui-adapter'] + '/dist/adapter-debug.js',
    ])
    .pipe(rename(function (path) {
        var basename = path.basename;
        path.basename = basename.replace(/-debug$/, '');
    }))
    .pipe(gulp.dest('./build'));
});

gulp.task('script', ['seed.js', 'bui.js', 'adapter.js'/**/], function() {
  return gulp.src([
      './build/**/*.js'
    ])
    .pipe(uglify({
      output: {
        ascii_only: true
      }
    }))
    .pipe(rename({suffix: '-min'}))
    .pipe(gulp.dest('./build'))
});

gulp.task('css', ['package'], function() {
  // gulp.src([
  //   ])
  // .pipe('')
  var files = [];
  for(var name in dependencies){
    files.push(getPackagePath(name, dependencies[name]) + '**/*.css');
  }
  return gulp.src(files)
    .pipe(rename(function(path){
      var basename = path.basename;
      if(!(/-debug$/.test(basename))){
        path.basename = basename + '-min';
      }
    }))
    .pipe(rename(function(path){
      path.basename = path.basename.replace(/-debug$/, '');
    }))
    .pipe(gulp.dest('./build'));
});

// 图片以及一些其他静态资源
gulp.task('assets', function() {
  var files = [
    '!**/*.js','!**/*.css'
  ];
  for(var name in dependencies){
    files.push(getPackagePath(name, dependencies[name]) + '**/*.*');
  }
  return gulp.src(files)
    .pipe(gulp.dest('./build'))
});

gulp.task('default',['prepare'], /**/ function() {
  return gulp.start('package', 'script', 'css', 'assets');
});