module.exports = function(grunt) {

    grunt.initConfig({
        //读取package.json的内容，形成个json数据
        pkg: grunt.file.readJSON('package.json'),

        // 设置任务，删除文件夹
        clean: {
            dist: ['css','dist']
        },

        // 通过sass编译成css文件
        sass: {
                dist: {
                files: [{
                    expand: true,
                    flatten: false, //fasle按照sass元目录生成
                    cwd: 'sass',
                    //src: ['**/*.scss'],
                    src: ['hum.scss'],
                    dest: 'css/',
                    ext: '.css',
                    "sourcemap=none": ''
                }]
            }
        },
        concat: {
            js: {
                src: [
                    'js/core/core.js',
                    'js/component/*.js'
                ],
                dest: 'js/hum.js'
            }
        },
        //拷贝文件
        copy: {
            dist: {
                expand: true,
                src: ['font/*','img/*.{png,jpg,jpeg}',
                'css/basic.css','css/hum.css',
                'js/hum.js',
                'lib/zepto/zepto.min.js'],
                dest: 'dist/'
            }
        },
        
        //压缩css
        cssmin: {
          //文件头部输出信息
          options: {
            banner: '/*! <%= pkg.name %> <%= grunt.template.today("yyyy-mm-dd") %> */\n',
            //美化代码
            beautify: {
              //中文ascii化，非常有用！防止中文乱码的神配置
              ascii_only: true
            }
          },
          my_target: {
            files: [
              {
                expand: true,
                //相对路径
                cwd: 'css/',
                src: '*.css',
                dest: 'dist/css/',
                rename: function (dest, src) {  
                    var folder = src.substring(0, src.lastIndexOf('/'));  
                    var filename = src.substring(src.lastIndexOf('/'), src.length);  
                    //  var filename=src;  
                    filename = filename.substring(0, filename.lastIndexOf('.'));  
                    var fileresult=dest + folder + filename + '.min.css';  
                    grunt.log.writeln("现处理文件："+src+"  处理后文件："+fileresult);  
                    return fileresult;  
                }
              }
            ]
          }
        },
        // 检测改变，自动跑sass任务
        watch: {
            css: {
                files: [
                    'sass/**/*.scss'
                ],
                tasks: ['clean','sass','copy']
            }
        }
    });
    // Default task.
    grunt.loadNpmTasks('grunt-contrib-clean');
    grunt.loadNpmTasks('grunt-contrib-sass');
    grunt.loadNpmTasks('grunt-contrib-concat');
    grunt.loadNpmTasks('grunt-contrib-watch');
    grunt.loadNpmTasks('grunt-contrib-cssmin');
    grunt.loadNpmTasks('grunt-contrib-copy');

    grunt.registerTask('default', [
        'clean:dist', 
        'sass:dist', 
        'concat',
        'copy',
        'cssmin',
        'watch:css'
    ]);
};