'use strict'
const path = require('path')
const settings = require('./src/config')
const CompressionWebpackPlugin = require('compression-webpack-plugin')

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

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
    publicPath: settings.contextPath,
    outputDir: 'dist',
    assetsDir: 'static',
    runtimeCompiler: true,
    lintOnSave: false,
    productionSourceMap: settings.isDev,
    transpileDependencies: ['el-admin-layout'],
    devServer: {
        port: process.env.port || 8079,
        contentBasePublicPath: settings.contextPath,
        open: true,
        overlay: {
            warnings: true,
            errors: true
        },
        proxy:
            settings.useMock
                ? null
                : {
                    [settings.apiPrefix]: {
                        target: 'http://localhost:8081',  //后台接口域名
                        ws: true,                         //如果要代理 websockets，配置这个参数
                        secure: false,                    //如果是https接口，需要配置这个参数
                        changeOrigin: true,               //是否跨域
                        pathRewrite: {
                            [`^${settings.apiPrefix}`]: ''
                        }
                    }
                },
        before(app) {
            require('./mock')(app)
        }
    },
    configureWebpack: {
        name: settings.title,
        resolve: {
            alias: {
                '@': resolve('src'),
                '@ele': resolve('element-ui-personal')
            }
        },
        plugins: [
            new CompressionWebpackPlugin({
                filename: '[path].gz[query]',
                algorithm: 'gzip',
                test: new RegExp('\\.(js|css)$'),  //匹配文件名
                threshold: 10 * 1024,               //对10K以上的数据进行压缩
                minRatio: 0.8,
                deleteOriginalAssets: false,        //是否删除源文件
            })
        ]
    },
    chainWebpack(config) {
        config.plugins.delete('preload')
        config.plugins.delete('prefetch')

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

        //将css合并到一个文件中
        //https://github.com/vuejs/vue-cli/issues/2843
        config.when(!settings.isDev, config => {
            config.optimization.splitChunks({
                cacheGroups: {
                    styles: {
                        name: 'styles',
                        test: (m) => /css\/mini-extract/.test(m.type),
                        chunks: 'all',
                        minChunks: 1,
                        enforce: true,
                    },
                }
            })
        })
    }
}