// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for details.

import * as fs from "fs";
import * as path from "path";
import * as semver from "semver";
import { OutputChannelLogger } from "../extension/log/OutputChannelLogger";
import { ProjectVersionHelper } from "./projectVersionHelper";
import { FileSystem } from "./node/fileSystem";
import { stripJsonTrailingComma } from "./utils";

export interface ParsedPackage {
    packageName: string;
    useSemverCoerce: boolean;
}

export class ReactNativeProjectHelper {
    /**
     * Ensures that we are in a React Native project
     * Otherwise, displays an error message banner
     */
    public static async isReactNativeProject(projectRoot: string): Promise<boolean> {
        if (!projectRoot || !fs.existsSync(path.join(projectRoot, "package.json"))) {
            return false;
        }

        const versions = await ProjectVersionHelper.getReactNativeVersions(
            projectRoot,
            undefined,
            projectRoot,
        );
        return !ProjectVersionHelper.isVersionError(versions.reactNativeVersion);
    }

    public static isHaulProject(projectRoot: string): boolean {
        const packageJsonPath = path.join(projectRoot, "package.json");
        if (!projectRoot || !fs.existsSync(packageJsonPath)) {
            return false;
        }

        const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, "utf-8"));
        const haulVersion =
            packageJson.devDependencies &&
            (packageJson.devDependencies.haul || packageJson.devDependencies["@haul-bundler/cli"]);
        return !!haulVersion;
    }

    public static isAndroidHermesEnabled(projectRoot: string): boolean {
        const buildGradlePath = path.join(projectRoot, "android", "app", "build.gradle");
        if (!projectRoot || !fs.existsSync(buildGradlePath)) {
            return false;
        }

        const buildGradleContent = fs.readFileSync(buildGradlePath, "utf-8");
        const hermesEnabled = /enableHermes\s*:\s*true/.test(buildGradleContent);
        return hermesEnabled;
    }

    public static isIOSHermesEnabled(projectRoot: string): boolean {
        const podfilePath = path.join(projectRoot, "ios", "Podfile");
        if (!projectRoot || !fs.existsSync(podfilePath)) {
            return false;
        }

        const podfileContent = fs.readFileSync(podfilePath, "utf-8");
        const matches = podfileContent.match(/#?\s*:hermes_enabled\s*=>\s*true/);
        return !!(matches && !matches[0].startsWith("#"));
    }

    public static isMacOSHermesEnabled(projectRoot: string): boolean {
        const podfilePath = path.join(projectRoot, "macos", "Podfile");
        if (!projectRoot || !fs.existsSync(podfilePath)) {
            return false;
        }

        const podfileContent = fs.readFileSync(podfilePath, "utf-8");
        let matches = podfileContent.match(/#?\s*:hermes_enabled\s*=>\s*(true|false)/);

        if (matches && matches.length > 1) {
            return !matches[0].startsWith("#") && matches[1] === "true";
        }

        matches = podfileContent.match(/#?\s*pod\s*'hermes'/);
        return !!(matches && !matches[0].startsWith("#"));
    }

    public static isWindowsHermesEnabled(projectRoot: string): boolean {
        const experimentalFeaturesPath = path.join(
            projectRoot,
            "windows",
            "ExperimentalFeatures.props",
        );
        if (!projectRoot || !fs.existsSync(experimentalFeaturesPath)) {
            return false;
        }

        const experimentalFeaturesContent = fs.readFileSync(experimentalFeaturesPath, "utf-8");
        const hermesEnabled = /<UseHermes>\s*true\s*<\/UseHermes>/.test(
            experimentalFeaturesContent,
        );
        return hermesEnabled;
    }

    public static async UpdateMertoBundlerForExpoWeb(launchArgs: any) {
        const appJsonPath = path.join(launchArgs.cwd, "app.json");
        const fs = new FileSystem();
        const appJson = await fs.readFile(appJsonPath).then(content => {
            return stripJsonTrailingComma(content.toString());
        });

        if (!appJson.expo.web.bundler) {
            appJson.expo.web.bundler = "metro";
            await fs.writeFile(appJsonPath, JSON.stringify(appJson, null, 2));
        }
    }

    public static async verifyMetroConfigFile(projectRoot: string) {
        const logger = OutputChannelLogger.getChannel(OutputChannelLogger.MAIN_CHANNEL_NAME, true);

        let version;
        try {
            version = await ProjectVersionHelper.getReactNativeVersions(projectRoot);
        } catch {
            version = await ProjectVersionHelper.getReactNativeVersions(
                projectRoot,
                undefined,
                projectRoot,
            );
        }

        let content = "";
        if (fs.existsSync(path.join(projectRoot, "metro.config.js"))) {
            content = fs.readFileSync(path.join(projectRoot, "metro.config.js"), "utf-8");
        } else if (fs.existsSync(path.join(projectRoot, "metro.config.cjs"))) {
            content = fs.readFileSync(path.join(projectRoot, "metro.config.cjs"), "utf-8");
        } else {
            return;
        }

        const isNewMetroConfig = content.includes("getDefaultConfig");
        if (semver.gte(version.reactNativeVersion, "0.73.0") && !isNewMetroConfig) {
            logger.warning(
                'The version of "metro.config" in current project is deprecated, it may cause project build failure. Please update your "metro.config.js" file according to template: https://github.com/facebook/react-native/blob/main/packages/react-native/template/metro.config.js',
            );
        }
    }
}