// import { getBasePathConfig } from '@/utils/baseUrl'

const path = require('path');
const defaultSettings = require('./src/settings.js');

const CopyWebpackPlugin = require('copy-webpack-plugin');
const webpack = require('webpack');

// const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
// http://127.0.0.1:8888/  分析打包模块可视化

const name = defaultSettings.title; // page title
const port = 9527; // dev port

let publicPath = '';
let outputDir = '';
(function () {
    publicPath = process.env.VUE_APP_PRO == 'local' || process.env.VUE_APP_PRO == 'ntyl' ? '/' : '/cbtc';
    outputDir = process.env.VUE_APP_PRO == 'local' || process.env.VUE_APP_PRO == 'ntyl' ? 'dist' : 'dist/cbtc';
})();

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
    /**
   * You will need to set publicPath if you plan to deploy your site under a sub path,
   * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
   * then publicPath should be set to "/bar/".
   * In most cases please use '/' !!!
   * Detail: https://cli.vuejs.org/config/#publicpath
   */
    publicPath: publicPath,
    outputDir: outputDir,
    assetsDir: 'static', // 相对于outputDir的静态资源(js、css、img、fonts)目录
    lintOnSave: false,
	productionSourceMap: process.env.VUE_APP_SOURCE_MAP,
    devServer: {
        port: port,
        host: '0.0.0.0',
        disableHostCheck: true,
        hotOnly: true,
        overlay: {
            warnings: false,
            errors: true
        }
        // proxy: {
        //   // change xxx-api/login => mock/login
        //   // detail: https://cli.vuejs.org/config/#devserver-proxy
        //   [process.env.VUE_APP_BASE_API]: {
        //     target: `http://localhost:${port}/mock`,
        //     changeOrigin: true,
        //     pathRewrite: {
        //       ['^' + process.env.VUE_APP_BASE_API]: ''
        //     }
        //   }
        // }
    },
    // css: {
    //     extract: true, // 是否使用css分离插件 ExtractTextPlugin
    //     sourceMap: false, // 开启 CSS source maps?
    //     loaderOptions: {
    //         css: {}, // 这里的选项会传递给 css-loader
    //         postcss: {} // 这里的选项会传递给 postcss-loader
    //     }, // css预设器配置项
    //     modules: false // 启用 CSS modules for all css / pre-processor files.
    // },
    // parallel: require('os').cpus().length > 1, // 是否为 Babel 或 TypeScript 使用 thread-loader。该选项在系统的 CPU 有多于一个内核时自动启用，仅作用于生产构建。
    configureWebpack: config => {
        // const appTarget = process.env.VUE_APP_PRO == 'local' ? 'HEB' : 'Common'; // 其他环境变量 区分配置
        // config.plugins.push(new webpack.NormalModuleReplacementPlugin(/(.*)_APP_TARGET(\.*)/,
        //     function (resourse) {
        //         resourse.request = resourse.request.replace(/APP_TARGET/, `${appTarget}`);
        //     })
        // );
        if (process.env.NODE_ENV != 'development') {
            config.mode = 'production';

            Object.assign(config, {
                output:{
                    ...config.output,
                    filename: `static/js/[name].[hash:6].js`,
                    chunkFilename: `static/js/[name].[chunkhash:6].js`
                }
            });
        } else {
            // 为开发环境修改配置...
            config.mode = 'development';
            config.name = name;
        }

        config.resolve = {
            extensions: ['.js', '.vue', '.json'],
            alias: { // 添加别名
                '@': path.resolve('src')
            }
        };

        config.plugins.push(new CopyWebpackPlugin([
            {
                from: path.resolve(__dirname, './static'),
                to: 'static',
                ignore: ['.*']
            }
        ]));
        // config.plugins.push(new BundleAnalyzerPlugin());
        config.externals = {}; // 配置CDN使用
    },
    // webpack配置
    chainWebpack(config) {
        // // 修复HMR
        // config.resolve.symlinks(true);
        config.plugins.delete('preload'); // TODO: need test
        config.plugins.delete('prefetch'); // 移除 prefetch 插件 预先加载模块

        // set svg-sprite-loader
        config.module
            .rule('svg')
            .exclude.add(path.resolve('src/icons'))
            .end();
        config.module
            .rule('icons')
            .test(/\.svg$/)
            .include.add(path.resolve('src/icons'))
            .end()
            .use('svg-sprite-loader')
            .loader('svg-sprite-loader')
            .options({
                symbolId: 'icon-[name]'
            })
            .end();

        // set preserveWhitespace
        config.module
            .rule('vue')
            .use('vue-loader')
            .loader('vue-loader')
            .tap(options => {
                options.compilerOptions.preserveWhitespace = true;
                return options;
            })
            .end();

        config
            // https://webpack.js.org/configuration/devtool/#development
            .when(process.env.NODE_ENV === 'development',
                config => config.devtool('cheap-source-map')
            );

        config
            .when(process.env.NODE_ENV !== 'development',
                config => {
                    config
                        .plugin('ScriptExtHtmlWebpackPlugin')
                        .after('html')
                        .use('script-ext-html-webpack-plugin', [{
                            // `runtime` must same as runtimeChunk name. default is `runtime`
                            inline: /runtime\..*\.js$/
                        }])
                        .end();
                    config
                        .optimization.splitChunks({
                            chunks: 'all', // async表示抽取异步模块，all表示对所有模块生效，initial表示对同步模块生效
                            maxInitialRequests: Infinity,
                            minSize: 300000, // 依赖包超过300000bit将被单独打包 当模块 大于30kb
                            minChunks: 1, // 打包⽣生成的chunk⽂文件最少有⼏几个chunk引⽤用了了这个模块
                            automaticNameDelimiter:'-', // 打包分割符号
                            cacheGroups: {
                                vendors: {
                                    test: /[\\/]node_modules[\\/]/,
                                    name(module) {
                                        const packageName = module.context.match(/[\\/]node_modules[\\/](.*?)([\\/]|$)/)[1];
                                        return `split-chunk.${packageName.replace('@', '')}`;
                                    },
                                    priority: 10, // 缓存组优先级 数字越⼤大，优先级越⾼高
                                    reuseExistingChunk: true // 如果当前代码块包含的模块已经有了，就不在产生一个新的代码块
                                },
                                jmapNew: {
                                    name: 'split-jmapNew',
                                    test: path.resolve(__dirname, './src/jmapNew'),
                                    priority: 9,
                                    minChunks: 1,
                                    reuseExistingChunk: true
                                },
                                jlmap3d: {
                                    name: 'split-jlmap3d',
                                    test: path.resolve(__dirname, './src/jlmap3d'),
                                    priority: 7,
                                    minChunks: 1,
                                    reuseExistingChunk: true
                                }
                            }
                        });
                    config.optimization.runtimeChunk('single');
                }
            );
    }

};