const pathPlugin = require( 'path' );
const webpack = require( 'webpack' );
var Extract = require( "extract-text-webpack-plugin" );
const AngularCompiler = require( '@ngtools/webpack' ).AngularCompilerPlugin;
const OptimizeCssnano = require( '@intervolga/optimize-cssnano-plugin' );

module.exports = ( env ) => {
    //环境
    const isDev = !( env && env.prod );
    const mode = isDev ? "development" : "production";

    //将css提取到单独文件中
    const extractCss = new Extract( "app.css" );

    //获取路径
    function getPath( path ) {
        return pathPlugin.join( __dirname, path );
    }

    //打包js
    let jsConfig = {
        mode: mode,
        entry: { app: getPath( "Typings/main.ts" ) },
        output: {
            publicPath: 'dist/',
            path: getPath( "wwwroot/dist" ),
            filename: "[name].js",
            chunkFilename: '[id].chunk.js'
        },
        optimization: {
            noEmitOnErrors: true
        },
        resolve: {
            extensions: ['.js', '.ts', '.less', '.css']
        },
        devtool: "source-map",
        module: {
            rules: [
                { test: /\.ts$/, use: isDev ? ['awesome-typescript-loader?silent=true', 'angular2-template-loader', 'angular-router-loader'] : ['@ngtools/webpack'] },
                { test: /\.html$/, use: 'html-loader?minimize=false' },
                {
                    test: /\.less$/,
                    use: [{
                        loader: 'to-string-loader'
                    }, {
                        loader: "css-loader"
                    }, {
                        loader: "less-loader",
                        options: {
                            javascriptEnabled: true
                        }
                    }]
                },
                {
                    test: /\.css$/, use: [{
                        loader: 'to-string-loader'
                    }, {
                        loader: "css-loader"
                    }]
                },
                {
                    test: /\.(png|jpg|gif|woff|woff2|eot|ttf|svg)(\?|$)/, use: {
                        loader: 'url-loader',
                        options: {
                            limit: 20000,
                            name: "[name].[ext]",
                            outputPath: "images/"
                        }
                    }
                }
            ]
        },
        plugins: [
            new webpack.DefinePlugin( {
                'process.env': { NODE_ENV: isDev ? JSON.stringify( "dev" ) : JSON.stringify( "prod" ) }
            } )
        ].concat( isDev ? [
            new webpack.DllReferencePlugin( {
                manifest: require( './wwwroot/dist/vendor-manifest.json' )
            } ),
            new webpack.DllReferencePlugin( {
                manifest: require( './wwwroot/dist/util-manifest.json' )
            } )
        ] : new AngularCompiler( {
            tsConfigPath: 'tsconfig.json',
            entryModule: "Typings/app/app.module#AppModule"
        } ) )
    }

    //打包css
    let cssConfig = {
        mode: mode,
        entry: { app: getPath( "wwwroot/css/main.less" ) },
        output: {
            publicPath: './',
            path: getPath( "wwwroot/dist" ),
            filename: "[name].css"
        },
        resolve: {
            modules: ['wwwroot']
        },
        devtool: "source-map",
        module: {
            rules: [
                {
                    test: /\.less$/, use: extractCss.extract( {
                        use: [{
                            loader: 'to-string-loader'
                        }, {
                            loader: "css-loader"
                        }, {
                            loader: "less-loader",
                            options: {
                                javascriptEnabled: true
                            }
                        }]
                    } )
                },
                {
                    test: /\.(png|jpg|gif|woff|woff2|eot|ttf|svg)(\?|$)/, use: {
                        loader: 'url-loader',
                        options: {
                            limit: 20000,
                            name: "[name].[ext]",
                            outputPath: "images/"
                        }
                    }
                }
            ]
        },
        plugins: [
            extractCss
        ].concat( isDev ? [] : new OptimizeCssnano( {
            cssnanoOptions: { preset: ['default', { discardComments: { removeAll: true } }] }
        } ) )
    }

    return [jsConfig, cssConfig];
}