/**

 * Created by 13

 **/

var gulp = require('gulp');

var clone = require('gulp-clone');

var htmlmin = require('gulp-htmlmin');

var gulpif = require('gulp-if');

var cssmin = require('gulp-minify-css');

var uglify = require('gulp-uglify');

var useref = require('gulp-useref');

var clean = require('gulp-clean');

var imagemin = require('gulp-imagemin');

//压缩html

gulp.task('html', function () {

    var options = {

        removeComments: true,  //清除HTML注释

        collapseWhitespace: true,  //压缩HTML

        collapseBooleanAttributes: false,  //省略布尔属性的值 <input checked="true"/> ==> <input checked />

        removeEmptyAttributes: false,  //删除所有空格作属性值 <input id="" /> ==> <input />

        removeScriptTypeAttributes: true,  //删除<script>的type="text/javascript"

        removeStyleLinkTypeAttributes: true,  //删除<style>和<link>的type="text/css"

        minifyJS: true,  //压缩页面JS

        minifyCSS: true  //压缩页面CSS

    };

    return gulp.src('dev-pages/*.html')

    .pipe(htmlmin(options))

    .pipe(gulp.dest('pages/'));

});

//压缩js

gulp.task('jsmin', function() {

    return gulp.src(['dev-source/js/ajax.js','dev-source/js/ajax_my.js'])

        .pipe(uglify({

            mangle: false

        }))

        .pipe(gulp.dest('source/js/'))

})

// 拷贝图片文件

gulp.task('image-copy', function () {

    return gulp.src('source-dev/webslice/**/*')

        .pipe(clone())

        .pipe(gulp.dest('source/webslice'));

});

gulp.task('image-min', function () {

    return gulp.src('dev-source/images/*.{png,jpg}')

        .pipe(imagemin())

        .pipe(gulp.dest('source/images/'));

});

//先复制图片到source，然后再执行压缩。

gulp.task('image-min2', ['image-copy'], function () {

    return gulp.src('source/webslice/**/*')

        .pipe(imagemin())

        .pipe(gulp.dest('source/webslice/'));

});

gulp.task('image-min3', function () {

    return gulp.src('dev-source/webview/img/*.{png,jpg}')

        .pipe(imagemin())

        .pipe(gulp.dest('source/webview/img/'));

});

//压缩图片

gulp.task('images-min',['image-min','image-min2','image-min3'],function() {})

//监听两个文件的文件变化

gulp.task('listenPages', function() {

    gulp.watch('dev-pages/*.html',['html']);

    gulp.watch('dev-source/js/*.js',['jsmin']);

});

// 构建任务流

// 执行 task build

gulp.task('build', ['html', 'image-min','jsmin']);