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

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

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

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

function resolve(dir) {
    return path.join(__dirname, dir);
}

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',
    lintOnSave: false,
    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')
    },
    configureWebpack: config => {
        config.name = name;
        config.resolve = {
            extensions: ['.js', '.vue', '.json'],
            alias: {
                '@': resolve('src')
            }
        };
        config.plugins.push(new CopyWebpackPlugin([
            {
                from: path.resolve(__dirname, './static'),
                to: 'static',
                ignore: ['.*']
            }
        ]));

        // if (isProduction) {
        //     config.plugins.push(new CompressionWebpackPlugin({
        //         algorithm: 'gzip',
        //         test: new RegExp('\\.(' + productionGzipExtensions.join('|') + ')$'),
        //         threshold: 10240,
        //         minRatio: 0.8
        //     }));
        // }

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

    },
    chainWebpack(config) {
        config.plugins.delete('preload'); // TODO: need test
        config.plugins.delete('prefetch'); // TODO: need test

        // set svg-sprite-loader
        config.module
            .rule('svg')
            .exclude.add(resolve('src/icons'))
            .end();
        config.module
            .rule('icons')
            .test(/\.svg$/)
            .include.add(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');
                }
            );
    }

};