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

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

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

// const CompressionPlugin = require('compression-webpack-plugin');
// const productionGzipExtensions = ['js', 'css'];
// const isProduction = process.env.NODE_ENV === 'production';

let { version } = require('./package.json');
version = version.replace(/\./g, '_');

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

// 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: '/',
    outputDir: 'dist',
    assetsDir: 'static', // 相对于outputDir的静态资源(js、css、img、fonts)目录
    lintOnSave: false,
    filenameHashing: true,
    productionSourceMap: false,
    devServer: {
        port: port,
        // open: 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]: ''
        //     }
        //   }
        // },
        // after: require('./mock/mock-server.js')
    },
    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 => {
        if (process.env.NODE_ENV === 'production') {
            // 为生产环境修改配置...
            config.mode = 'production';

            Object.assign(config, {
                output:{
                    ...config.output,
                    filename: `static/js/[name].[chunkhash].${version}.js`,
                    chunkFilename: `static/js/[name].[chunkhash].${version}.js`
                }
            });
            // config.plugins = [
            //     ...config.plugins,
            //     new CompressionPlugin({
            //         test:/\.js$|\.html$|.\css/, // 匹配文件名
            //         threshold: 10240, // 对超过10k的数据压缩
            //         deleteOriginalAssets: false // 不删除源文件
            //     })
            // ];

        } 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.externals = { // 配置使用CDN
            'vue': 'Vue',
            'vuex': 'Vuex',
            'vue-router': 'VueRouter',
            'nprogress': 'NProgress',
            'echarts': 'echarts',
            'element-ui': 'ELEMENT'
        };

    },
    // 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

        // 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',
                    //         cacheGroups: {
                    //             libs: {
                    //                 name: 'chunk-libs',
                    //                 test: /[\\/]node_modules[\\/]/,
                    //                 priority: 10,
                    //                 chunks: 'initial' // only package third parties that are initially dependent
                    //             },
                    //             // elementUI: {
                    //             //     name: 'chunk-elementUI', // split elementUI into a single package
                    //             //     priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
                    //             //     test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
                    //             // },
                    //             commons: {
                    //                 name: 'chunk-commons',
                    //                 test: resolve('src/components'), // can customize your rules
                    //                 minChunks: 3, //  minimum common number
                    //                 priority: 5,
                    //                 reuseExistingChunk: true
                    //             }
                    //             // jmap: {
                    //             //     name: 'chunk-jmap',
                    //             //     test: resolve('src/jmap'), // can customize your rules
                    //             //     minChunks: 3, //  minimum common number
                    //             //     priority: 5,
                    //             //     reuseExistingChunk: true
                    //             // },
                    //             // jlmap3d: {
                    //             //     name: 'chunk-jlmap3d',
                    //             //     test: resolve('src/jlmap3d'), // can customize your rules
                    //             //     minChunks: 3, //  minimum common number
                    //             //     priority: 5,
                    //             //     reuseExistingChunk: true
                    //             // },
                    //             // ibp: {
                    //             //     name: 'chunk-ibp',
                    //             //     test: resolve('src/ibp'), // can customize your rules
                    //             //     minChunks: 3, //  minimum common number
                    //             //     priority: 5,
                    //             //     reuseExistingChunk: true
                    //             // }
                    //         }
                    //     });
                    config.optimization.runtimeChunk('single');
                }
            );
    }

};