/*
 * Common Environment
 */

const INDEX_NAME = 'test-build';
const YML_PATH = './webpack.yml';
const CONF_VAR = 'App\\Templates\\WebpackTemplateProvider';

const path = require('path');
const fs = require('fs');
const yaml = require('js-yaml');
const webpack = require('webpack');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');

/*
 * Load webpack configuration from webpack.yml
 */

const yml = yaml.load(
    fs.readFileSync(path.join(__dirname, YML_PATH), 'utf8'),
);
const conf = yml[CONF_VAR]

const UIInfo = require('./package.json');
const UIVERSION = JSON.stringify(UIInfo.version);
const UIMetaInfo = require('./package.json');
const NODE_ENV = process.env.NODE_ENV;
const COMPRESS = NODE_ENV === 'production' ? true : false;

console.log('NODE_ENV: ' + NODE_ENV);
console.log('COMPRESS: ' + COMPRESS);
console.log('WebP images: ' + conf['webp']);
console.log('GRAPHQL_API_KEY: ' + conf['GRAPHQL_API_KEY']);
console.log('HTTPS: ' + conf['HTTPS']);

let themes = [];
// add themes
if (conf.THEMESDIR) {
    const themeDir = conf.THEMESDIR;
    const dir = path.resolve(__dirname, themeDir);

    if (fs.existsSync(dir)) {
        fs.readdirSync(dir).forEach((file) => {
            filePath = path.join(themeDir, file);
            const stat = fs.statSync(filePath);

            if (stat && stat.isDirectory()) {
                themes.push(filePath);
            }
        });
    }
}

/* Setup Entries */
const includes = {};
const modules = [
    path.resolve(__dirname, conf.APPDIR, conf.SRC),
    path.resolve(__dirname, conf.APPDIR, conf.SRC, 'js'),
    path.resolve(__dirname, conf.APPDIR, conf.SRC, 'scss'),
    path.resolve(__dirname, conf.APPDIR, conf.SRC, 'img'),
    path.resolve(__dirname, conf.APPDIR, conf.SRC, 'thirdparty'),
    path.resolve(__dirname, 'node_modules'),
    path.resolve(__dirname),
    path.resolve(__dirname, 'public'),
];

const _addAppFiles = (theme) => {
    const dirPath = './' + theme;
    let themeName = path.basename(theme);
    if (themeName == '.') {
        themeName = 'app';
    }

    if (fs.existsSync(path.join(dirPath, conf.SRC, 'js', INDEX_NAME + '.js'))) {
        includes[`${themeName}`] = path.join(dirPath, conf.SRC, 'js', INDEX_NAME + '.js');
    } else if (
        fs.existsSync(path.join(dirPath, conf.SRC, 'scss', INDEX_NAME + '.scss'))
    ) {
        includes[`${themeName}`] = path.join(
            dirPath,
            conf.SRC,
            'scss',
            INDEX_NAME + '.scss',
        );
    }

    modules.push(path.join(dirPath, conf.SRC, 'js'));
    modules.push(path.join(dirPath, conf.SRC, 'scss'));
    modules.push(path.join(dirPath, conf.SRC, 'img'));
    modules.push(path.join(dirPath, conf.SRC, 'thirdparty'));

    const _getAllFilesFromFolder = function(dir, includeSubFolders = true) {
        const dirPath = path.resolve(__dirname, dir);
        let results = [];

        fs.readdirSync(dirPath).forEach((file) => {
            if (file.charAt(0) === '_') {
                return;
            }

            const filePath = path.join(dirPath, file);
            const stat = fs.statSync(filePath);

            if (stat && stat.isDirectory() && includeSubFolders) {
                results = results.concat(
                    _getAllFilesFromFolder(filePath, includeSubFolders),
                );
            } else {
                results.push(filePath);
            }
        });

        return results;
    };

    // add page specific scripts
    const typesJSPath = path.join(theme, conf.TYPESJS);
    if (fs.existsSync(typesJSPath)) {
        const pageScripts = _getAllFilesFromFolder(typesJSPath, true);
        pageScripts.forEach((file) => {
            includes[`${themeName}_${path.basename(file, '.js')}`] = file;
        });
    }

    // add page specific scss
    const typesSCSSPath = path.join(theme, conf.TYPESSCSS);
    if (fs.existsSync(typesSCSSPath)) {
        const scssIncludes = _getAllFilesFromFolder(typesSCSSPath, true);
        scssIncludes.forEach((file) => {
            includes[`${themeName}_${path.basename(file, '.scss')}`] = file;
        });
    }
};

_addAppFiles(conf.APPDIR);

// remove some backend includes
delete includes['app_editor'];
delete includes['app_cms'];
delete includes['app_order'];

// add themes
themes.forEach((theme) => {
    _addAppFiles(theme);
});

module.exports = {
    configuration: conf,
    themes: themes,
    webpack: {
        entry: includes,
        externals: {
            // comment out jQuery if you don't use it to prevent bootstrap thinking that there's jQuery present
            //jquery: 'jQuery',
            react: 'React',
            'react-dom': 'ReactDOM',
        },
        resolve: {
            modules: modules,
            alias: {
                // comment out jQuery if you don't use it to prevent bootstrap thinking that there's jQuery present
                /*'window.jQuery': require.resolve('jquery'),
                $: require.resolve('jquery'),
                jquery: require.resolve('jquery'),
                jQuery: require.resolve('jquery'),*/
                react: require.resolve('react'),
                'react-dom': require.resolve('react-dom'),
            },
            fallback: {
                path: false
            },
        },
        experiments: {
            topLevelAwait: true,
        },
    },
    plugins: [
        new webpack.ProvidePlugin({
            react: 'React',
            'react-dom': 'ReactDOM',
            /*$: 'jquery',
            jQuery: 'jquery',
            Popper: ['popper.js', 'default'],
            Util: 'exports-loader?Util!bootstrap/js/dist/util',
            Alert: 'exports-loader?Alert!bootstrap/js/dist/alert',
            Button: 'exports-loader?Button!bootstrap/js/dist/button',
            Carousel: 'exports-loader?Carousel!bootstrap/js/dist/carousel',
            Collapse: 'exports-loader?Collapse!bootstrap/js/dist/collapse',
            Dropdown: 'exports-loader?Dropdown!bootstrap/js/dist/dropdown',
            Modal: 'exports-loader?Modal!bootstrap/js/dist/modal',
            Tooltip: 'exports-loader?Tooltip!bootstrap/js/dist/tooltip',
            Popover: 'exports-loader?Popover!bootstrap/js/dist/popover',
            Scrollspy: 'exports-loader?Scrollspy!bootstrap/js/dist/scrollspy',
            Tab: 'exports-loader?Tab!bootstrap/js/dist/tab',*/
        }),
        new webpack.DefinePlugin({
            'process.env': {
                NODE_ENV: JSON.stringify(NODE_ENV),
            },
            UINAME: JSON.stringify(UIInfo.name),
            UIVERSION: UIVERSION,
            UIAUTHOR: JSON.stringify(UIInfo.author),
            UIMetaNAME: JSON.stringify(UIMetaInfo.name),
            UIMetaVersion: JSON.stringify(UIMetaInfo.version),
            GRAPHQL_API_KEY: JSON.stringify(conf['GRAPHQL_API_KEY']),
            SWVERSION: JSON.stringify(`sw-${new Date().getTime()}`),
            BASE_HREF: JSON.stringify(''),
        }),
        new webpack.LoaderOptionsPlugin({
            minimize: COMPRESS,
            debug: !COMPRESS,
        }),
        new MiniCssExtractPlugin({
            filename: 'css/[name].css',
            //allChunks: true,
        }),
    ]
};