var gulp = require('gulp'),
    minifycss = require('gulp-minify-css'),
    //minifyhtml = require('gulp-minify-html'),
    concat = require('gulp-concat'),
    uglify = require('gulp-uglify'),
    //imagemin = require('gulp-imagemin'),
    rename = require('gulp-rename'),
    del = require('del'),
    less = require('gulp-less');

gulp.task('less', function () {
    return gulp.src('less/bootstrap.less')
        .pipe(less())
        .pipe(gulp.dest('dist/style'));
});
gulp.task('minify', function() {
    return gulp.src(['js/*.js'])
        .pipe(concat('main.js')) //合并所有js到main.js
        .pipe(rename({
            suffix: '.min'
        })) //rename压缩后的文件名 让main.js变成main.min.js
        .pipe(uglify()) //执行压缩
        .pipe(gulp.dest('./dist/js'))
});
gulp.task('minifycss', function() {
    return gulp.src('./style/*.css') //压缩的文件
        .pipe(concat('main.css')) //合并所有js到main.js
        .pipe(rename({
            suffix: '.min'
        }))
        .pipe(minifycss())
        .pipe(gulp.dest('./dist/style')); //输出文件夹
});

gulp.task('imagemin', function() {
    return gulp.src('./images/*.+(jpeg|jpg|png)')
        .pipe(imagemin({
            optimizationLevel: 7, //类型：Number  默认：3  取值范围：0-7（优化等级）
            progressive: true, //类型：Boolean 默认：false 无损压缩jpg图片
            interlaced: true, //类型：Boolean 默认：false 隔行扫描gif进行渲染
            multipass: true //类型：Boolean 默认：false 多次优化svg直到完全优化
        }))
        .pipe(gulp.dest('./dist/images'));
});

gulp.task('default', ['minify', 'minifycss', 'less', 'imagemin']);