const { resolve } = require('path');
const watchFolders = [
    '../src', '../node_modules', '../../oak-domain', '../../oak-common-aspect', '../../oak-external-sdk',
    '../../oak-frontend-base', '../../oak-general-business', '../../oak-memory-tree-store'
];

let moduleFileExtensions = ['js', 'ts', 'jsx', 'tsx', 'less', 'json', 'svg'];

if (process.env.OAK_DEV_MODE === 'frontend') {
    moduleFileExtensions = [
        'frontend.js',
        'frontend.ts',
        'frontend.tsx',
        'frontend.jsx',
    ].concat(moduleFileExtensions);
} else {
    moduleFileExtensions = [
        'server.js',
        'server.ts',
        'server.tsx',
        'server.jsx',
    ].concat(moduleFileExtensions);
}

const prodFileExtensions = [
    'prod.native.js',
    'prod.native.ts',
    'prod.native.jsx',
    'prod.native.tsx',
    'prod.js',
    'prod.ts',
    'prod.jsx',
    'prod.tsx',
];

if (process.env.NODE_ENV === 'production') {
    moduleFileExtensions = prodFileExtensions.concat(moduleFileExtensions);
}
else if (process.env.NODE_ENV === 'staging') {
    moduleFileExtensions = [
        'staging.native.js',
        'staging.native.ts',
        'staging.native.jsx',
        'staging.native.tsx',
        'staging.js',
        'staging.ts',
        'staging.jsx',
        'staging.tsx',
    ].concat(prodFileExtensions).concat(moduleFileExtensions);
} else {
    moduleFileExtensions = [
        'dev.native.js',
        'dev.native.ts',
        'dev.native.jsx',
        'dev.native.tsx',
        'dev.js',
        'dev.ts',
        'dev.jsx',
        'dev.tsx',
    ].concat(moduleFileExtensions);
}

const sourceExts = moduleFileExtensions;

const NullModules = ['fs', 'url'];
/**
 * Metro configuration
 * https://facebook.github.io/metro/docs/configuration
 *
 * @type {import('metro-config').MetroConfig}
 */
const config = {
    transformer: {
        babelTransformerPath: resolve(__dirname, 'transformer.js'),
        // hermesParser: true,
    },
    resolver: {
        sourceExts,
        resolveRequest: (context, moduleName, platform) => {
            if (NullModules.includes(moduleName)) {
                return {
                    type: 'empty',
                };
            }
            return context.resolveRequest(context, moduleName, platform);
        },
        nodeModulesPaths: [resolve(process.cwd(), '..', 'node_modules')],          // development模式下，oak的库是以文件方式链接，其自身的node_modules里可能会缺失一些库
    },
    watchFolders,
};

module.exports = config;