const path = require('path');
const fs = require('fs');
const glob =require('glob');
const HtmlWebpackPlugin = require('html-webpack-plugin');

function getView(globPath,flag){
    let files = glob.sync(globPath);

    let entries = {},
    entry, dirname, basename, pathname, extname;

    files.forEach(item => {
        entry = item;
        dirname = path.dirname(entry);//当前目录
        extname = path.extname(entry);//后缀
        basename = path.basename(entry, extname);//文件名
        pathname = path.join(dirname, basename);//文件路径
        if (extname === '.html' || extname === '.ejs') {
            entries[pathname] = './' + entry;
        } 
        else if (extname === '.js') {
            entries[basename] = entry;
        }
        //else if(extname === '.ejs'){
                //     filename: 'index.html',
                //     template: path.resolve(__dirname, 'src/index.ejs'),
                //     chunks: ['manifest', 'vendor', 'index'],
                // }
        //}
    });

    return entries;
}

function extendEntires(config){
    let entriesObj = getView('./src/*.js');

    Object.assign(entriesObj,{
        vendor: ['es5-shim', 'es5-shim/es5-sham', 'es6-promise', 'fetch-ie8', 'console-polyfill']
    });

    config.entry=entriesObj;

    return config;
}

function extendHtmlPluginList(config){

    let pages = Object.keys(getView('./src/*.ejs'));

    pages.forEach(pathname => {
        let htmlname = pathname.split('src\\')[1]||pathname.split('src\/')[1];
        // let conf = {
        //     filename: `${htmlname}.html`,
        //     template: `${pathname}.ejs`,
        //     hash: true,
        //     chunks:[htmlname],
        //     minify: {
        //         removeAttributeQuotes:true,
        //         removeComments: true,
        //         collapseWhitespace: true,
        //         removeScriptTypeAttributes:true,
        //         removeStyleLinkTypeAttributes:true
        //     }
        // };
    
        let conf=  {
            filename: `${htmlname||pathname}.html`,
            template:  path.resolve(__dirname,`${pathname}.ejs`),
            chunks: ['manifest', 'vendor', htmlname],
        };
    
        config.plugins.push(new HtmlWebpackPlugin(conf));
    });
    
    let pluginsLen=config.plugins.length;
    // console.log('              \n\n--------------')
    // console.log(pages.length,JSON.stringify(config.plugins[pluginsLen-1]))
    // console.log('              \n\n--------------')
    return config;
}

function extendConfig(config){
    extendEntires(config);
    extendHtmlPluginList(config);
    return config;
}

module.exports={extendEntires,extendHtmlPluginList,extendConfig}