/* global __dirname */

const path = require('path');
const packageDefinition = require('./package.json');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const webpack = require('webpack');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");

const VueLoaderPlugin = require('vue-loader/lib/plugin');
const gitRevision = require('child_process')
    .execSync('git rev-parse HEAD')
    .toString().trim();
const gitBranch = require('child_process')
    .execSync('git rev-parse --abbrev-ref HEAD')
    .toString().trim();

/** @type {import('webpack').Configuration} */
const config = {
    entry: {
        openmct: './openmct.js',
        couchDBChangesFeed: './src/plugins/persistence/couch/CouchChangesFeed.js',
        inMemorySearchWorker: './src/api/objects/InMemorySearchWorker.js',
        espressoTheme: './src/plugins/themes/espresso-theme.scss',
        snowTheme: './src/plugins/themes/snow-theme.scss',
        maelstromTheme: './src/plugins/themes/maelstrom-theme.scss'
    },
    output: {
        globalObject: "this",
        filename: '[name].js',
        library: '[name]',
        libraryTarget: 'umd',
        publicPath: '',
        hashFunction: 'xxhash64',
        clean: true
    },
    resolve: {
        alias: {
            "@": path.join(__dirname, "src"),
            "legacyRegistry": path.join(__dirname, "src/legacyRegistry"),
            "saveAs": "file-saver",
            "csv": "comma-separated-values",
            "EventEmitter": "eventemitter3",
            "bourbon": "bourbon.scss",
            "plotly-basic": "plotly.js-basic-dist",
            "plotly-gl2d": "plotly.js-gl2d-dist",
            "d3-scale": path.join(__dirname, "node_modules/d3-scale/build/d3-scale.min.js"),
            "printj": path.join(__dirname, "node_modules/printj/dist/printj.min.js"),
            "styles": path.join(__dirname, "src/styles"),
            "MCT": path.join(__dirname, "src/MCT"),
            "testUtils": path.join(__dirname, "src/utils/testUtils.js"),
            "objectUtils": path.join(__dirname, "src/api/objects/object-utils.js"),
            "utils": path.join(__dirname, "src/utils")
        }
    },
    plugins: [
        new webpack.DefinePlugin({
            __OPENMCT_VERSION__: `'${packageDefinition.version}'`,
            __OPENMCT_BUILD_DATE__: `'${new Date()}'`,
            __OPENMCT_REVISION__: `'${gitRevision}'`,
            __OPENMCT_BUILD_BRANCH__: `'${gitBranch}'`
        }),
        new VueLoaderPlugin(),
        new CopyWebpackPlugin({
            patterns: [
                {
                    from: 'src/images/favicons',
                    to: 'favicons'
                },
                {
                    from: './index.html',
                    transform: function (content) {
                        return content.toString().replace(/dist\//g, '');
                    }
                }
            ]
        }),
        new MiniCssExtractPlugin({
            filename: '[name].css',
            chunkFilename: '[name].css'
        })
    ],
    module: {
        rules: [
            {
                test: /\.(sc|sa|c)ss$/,
                use: [
                    MiniCssExtractPlugin.loader,
                    {
                        loader: 'css-loader'
                    },
                    'resolve-url-loader',
                    'sass-loader'
                ]
            },
            {
                test: /\.vue$/,
                use: 'vue-loader'
            },
            {
                test: /\.html$/,
                use: 'html-loader'
            },
            {
                test: /zepto/,
                use: [
                    "imports-loader?this=>window",
                    "exports-loader?Zepto"
                ]
            },
            {
                test: /\.(jpg|jpeg|png|svg|ico|woff|woff2?|eot|ttf)$/,
                loader: 'file-loader',
                options: {
                    name: '[name].[ext]',
                    outputPath(url, resourcePath, context) {
                        if (/\.(jpg|jpeg|png|svg)$/.test(url)) {
                            return `images/${url}`;
                        }

                        if (/\.ico$/.test(url)) {
                            return `icons/${url}`;
                        }

                        if (/\.(woff|woff2?|eot|ttf)$/.test(url)) {
                            return `fonts/${url}`;
                        } else {
                            return `${url}`;
                        }
                    }
                }
            }
        ]
    },
    stats: 'errors-warnings'
};

module.exports = config;