const { getDefaultConfig } = require("expo/metro-config");
const path = require("node:path");
const fs = require("node:fs");
const { FileStore } = require("metro-cache");
const { reportErrorToRemote } = require("./__create/report-error-to-remote");
const {
	handleResolveRequestError,
	VIRTUAL_ROOT,
	VIRTUAL_ROOT_UNRESOLVED,
} = require("./__create/handle-resolve-request-error");

/** @type {import('expo/metro-config').MetroConfig} */
const config = getDefaultConfig(__dirname);

config.maxWorkers = 6;

const WEB_ALIASES = {
	"expo-secure-store": path.resolve(
		__dirname,
		"./polyfills/web/secureStore.web.ts",
	),
	"react-native-webview": path.resolve(
		__dirname,
		"./polyfills/web/webview.web.tsx",
	),
	"react-native-safe-area-context": path.resolve(
		__dirname,
		"./polyfills/web/safeAreaContext.web.tsx",
	),
	"react-native-maps": path.resolve(__dirname, "./polyfills/web/maps.web.tsx"),
	"react-native-web/dist/exports/SafeAreaView": path.resolve(
		__dirname,
		"./polyfills/web/SafeAreaView.web.tsx",
	),
	"react-native-web/dist/exports/Alert": path.resolve(
		__dirname,
		"./polyfills/web/alerts.web.tsx",
	),
	"react-native-web/dist/exports/RefreshControl": path.resolve(
		__dirname,
		"./polyfills/web/refreshControl.web.tsx",
	),
	"expo-status-bar": path.resolve(
		__dirname,
		"./polyfills/web/statusBar.web.tsx",
	),
	"expo-location": path.resolve(__dirname, "./polyfills/web/location.web.ts"),
	"./layouts/Tabs": path.resolve(__dirname, "./polyfills/web/tabbar.web.tsx"),
	"expo-notifications": path.resolve(
		__dirname,
		"./polyfills/web/notifications.web.tsx",
	),
	"expo-contacts": path.resolve(__dirname, "./polyfills/web/contacts.web.ts"),
	"expo-font": path.resolve(__dirname, "./polyfills/web/expo-font.web.ts"),
	"react-native-google-mobile-ads": path.resolve(
		__dirname,
		"./polyfills/web/google-mobile-ads.web.tsx",
	),
	"react-native-web/dist/exports/ScrollView": path.resolve(
		__dirname,
		"./polyfills/web/scrollview.web.tsx",
	),
	"expo-haptics": path.resolve(__dirname, "./polyfills/web/haptics.web.ts"),
	"expo-clipboard": path.resolve(__dirname, "./polyfills/web/clipboard.web.ts"),
	"expo-camera": path.resolve(__dirname, "./polyfills/web/camera.web.tsx"),
	"expo-image-picker": path.resolve(
		__dirname,
		"./polyfills/web/imagePicker.web.ts",
	),
	"expo-linking": path.resolve(__dirname, "./polyfills/web/linking.web.ts"),
	"expo-web-browser": path.resolve(
		__dirname,
		"./polyfills/web/webBrowser.web.ts",
	),
	"expo-document-picker": path.resolve(
		__dirname,
		"./polyfills/web/documentPicker.web.ts",
	),
};
const NATIVE_ALIASES = {
	"./Libraries/Components/TextInput/TextInput": path.resolve(
		__dirname,
		"./polyfills/native/textinput.native.tsx",
	),
	"react-native-google-mobile-ads": path.resolve(
		__dirname,
		"./polyfills/native/google-mobile-ads.native.tsx",
	),
};
// Aliases that only apply outside production. The real packages crash on
// import in Expo Go preview (their browser-mode shims pull in DOM-only code
// that throws on Hermes), which makes expo-router silently swallow the load
// error and warn "Route is missing the required default export" — leaving
// the app on a black/splash screen. EAS production builds keep the real
// modules so paid users hit the native SDKs as normal.
const DEV_ONLY_NATIVE_ALIASES = {
	"react-native-purchases": path.resolve(
		__dirname,
		"./polyfills/native/react-native-purchases.native.tsx",
	),
};
const SHARED_ALIASES = {
	"expo-image": path.resolve(__dirname, "./polyfills/shared/expo-image.tsx"),
};
fs.mkdirSync(VIRTUAL_ROOT_UNRESOLVED, { recursive: true });
config.watchFolders = [
	...config.watchFolders,
	VIRTUAL_ROOT,
	VIRTUAL_ROOT_UNRESOLVED,
];

// Add web-specific alias configuration through resolveRequest
config.resolver.resolveRequest = (context, moduleName, platform) => {
	try {
		// Polyfills are not resolved by Metro
		if (
			context.originModulePath.startsWith(`${__dirname}/polyfills/native`) ||
			context.originModulePath.startsWith(`${__dirname}/polyfills/web`) ||
			context.originModulePath.startsWith(`${__dirname}/polyfills/shared`)
		) {
			return context.resolveRequest(context, moduleName, platform);
		}
		// Wildcard alias for Expo Google Fonts
		if (
			moduleName.startsWith("@expo-google-fonts/") &&
			moduleName !== "@expo-google-fonts/dev"
		) {
			return context.resolveRequest(
				context,
				"@expo-google-fonts/dev",
				platform,
			);
		}
		// Resolve AnythingMenu to empty component in production
		if (moduleName === "./src/__create/anything-menu") {
			const isProduction = process.env.EXPO_PUBLIC_CREATE_ENV === "PRODUCTION";
			if (isProduction) {
				// Create empty component for production
				const emptyComponentPath = path.resolve(
					__dirname,
					"./polyfills/shared/empty-component.tsx",
				);
				return context.resolveRequest(context, emptyComponentPath, platform);
			}
		}
		if (SHARED_ALIASES[moduleName] && !moduleName.startsWith("./polyfills/")) {
			return context.resolveRequest(
				context,
				SHARED_ALIASES[moduleName],
				platform,
			);
		}
		if (platform === "web") {
			// Only apply aliases if the module is one of our polyfills
			if (WEB_ALIASES[moduleName] && !moduleName.startsWith("./polyfills/")) {
				return context.resolveRequest(
					context,
					WEB_ALIASES[moduleName],
					platform,
				);
			}
			return context.resolveRequest(context, moduleName, platform);
		}

		if (NATIVE_ALIASES[moduleName] && !moduleName.startsWith("./polyfills/")) {
			return context.resolveRequest(
				context,
				NATIVE_ALIASES[moduleName],
				platform,
			);
		}
		if (
			DEV_ONLY_NATIVE_ALIASES[moduleName] &&
			!moduleName.startsWith("./polyfills/") &&
			process.env.EXPO_PUBLIC_CREATE_ENV !== "PRODUCTION"
		) {
			return context.resolveRequest(
				context,
				DEV_ONLY_NATIVE_ALIASES[moduleName],
				platform,
			);
		}
		return context.resolveRequest(context, moduleName, platform);
	} catch (error) {
		return handleResolveRequestError({ error, context, platform, moduleName });
	}
};

const cacheDir = path.join(__dirname, "caches");

config.cacheStores = () => [
	new FileStore({
		root: path.join(cacheDir, ".metro-cache"),
	}),
];
config.resetCache = false;
config.fileMapCacheDirectory = cacheDir;
config.reporter = {
	...config.reporter,
	update: (event) => {
		config.reporter?.update(event);
		const reportableErrors = [
			"error",
			"bundling_error",
			"cache_read_error",
			"hmr_client_error",
			"transformer_load_failed",
		];
		for (const errorType of reportableErrors) {
			if (event.type === errorType) {
				reportErrorToRemote({ error: event.error }).catch((_reportError) => {
					// no-op
				});
			}
		}
		return event;
	},
};

const originalGetTransformOptions = config.transformer.getTransformOptions;

config.transformer = {
	...config.transformer,
	getTransformOptions: async (entryPoints, options) => {
		if (options.dev === false) {
			fs.rmSync(cacheDir, { recursive: true, force: true });
			fs.mkdirSync(cacheDir);
		}
		return await originalGetTransformOptions(entryPoints, options);
	},
};

module.exports = config;