'use strict';

const merge = require('webpack-merge');
const common = require('./webpack.common.js');
const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
// const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;

module.exports = (env = {}) =>
  merge(common, {
    devtool: 'cheap-module-source-map',
    mode: 'development',

    entry: {
      app: './public/app/index.ts',
      dark: './public/sass/grafana.dark.scss',
      light: './public/sass/grafana.light.scss',
    },

    // If we enabled watch option via CLI
    watchOptions: {
      ignored: /node_modules/,
    },

    module: {
      rules: [{
          test: /\.tsx?$/,
          enforce: 'pre',
          exclude: /node_modules/,
          use: {
            loader: 'tslint-loader',
            options: {
              emitErrors: true,
              typeCheck: false,
            }
          }
        },
        {
          test: /\.tsx?$/,
          exclude: /node_modules/,
          use: {
            loader: 'ts-loader',
            options: {
              transpileOnly: true
            },
          },
        },
        require('./sass.rule.js')({
          sourceMap: false,
          preserveUrl: false
        }),
        {
          test: /\.(png|jpg|gif|ttf|eot|svg|woff(2)?)(\?[a-z0-9=&.]+)?$/,
          loader: 'file-loader'
        },
      ]
    },

    plugins: [
      new CleanWebpackPlugin(),
      env.noTsCheck ?
      new webpack.DefinePlugin({}) // bogus plugin to satisfy webpack API
      :
      new ForkTsCheckerWebpackPlugin({
        checkSyntacticErrors: true,
      }),
      new MiniCssExtractPlugin({
        filename: 'grafana.[name].[hash].css'
      }),
      new HtmlWebpackPlugin({
        filename: path.resolve(__dirname, '../../public/views/error.html'),
        template: path.resolve(__dirname, '../../public/views/error-template.html'),
        inject: false,
        chunksSortMode: 'none',
        excludeChunks: ['dark', 'light']
      }),
      new HtmlWebpackPlugin({
        filename: path.resolve(__dirname, '../../public/views/index.html'),
        template: path.resolve(__dirname, '../../public/views/index-template.html'),
        inject: 'body',
        chunksSortMode: 'none',
        excludeChunks: ['dark', 'light']
      }),
      new webpack.NamedModulesPlugin(),
      new webpack.HotModuleReplacementPlugin(),
      new webpack.DefinePlugin({
        'process.env': {
          NODE_ENV: JSON.stringify('development')
        }
      }),
      // new BundleAnalyzerPlugin({
      //   analyzerPort: 8889
      // })
    ]
  });