#!/usr/bin/env node

/**

 * This script is used to reset the project to a blank state.

 * It deletes or moves the /app, /components, /hooks, /scripts, and /constants directories to /app-example based on user input and creates a new /app directory with an index.tsx and _layout.tsx file.

 * You can remove the `reset-project` script from package.json and safely delete this file after running it.

 */

const fs = require("fs");

const path = require("path");

const readline = require("readline");

const root = process.cwd();

const oldDirs = ["app", "components", "hooks", "constants", "scripts"];

const exampleDir = "app-example";

const newAppDir = "app";

const exampleDirPath = path.join(root, exampleDir);

const indexContent = `import { Text, View } from "react-native";

export default function Index() {

  return (

    <View

      style={{

        flex: 1,

        justifyContent: "center",

        alignItems: "center",

      }}

    >

      <Text>Edit app/index.tsx to edit this screen.</Text>

    </View>

  );

}

`;

const layoutContent = `import { Stack } from "expo-router";

export default function RootLayout() {

  return <Stack />;

}

`;

const rl = readline.createInterface({

  input: process.stdin,

  output: process.stdout,

});

const moveDirectories = async (userInput) => {

  try {

    if (userInput === "y") {

      // Create the app-example directory

      await fs.promises.mkdir(exampleDirPath, { recursive: true });

      console.log(`📁 /${exampleDir} directory created.`);

    }

    // Move old directories to new app-example directory or delete them

    for (const dir of oldDirs) {

      const oldDirPath = path.join(root, dir);

      if (fs.existsSync(oldDirPath)) {

        if (userInput === "y") {

          const newDirPath = path.join(root, exampleDir, dir);

          await fs.promises.rename(oldDirPath, newDirPath);

          console.log(`➡️ /${dir} moved to /${exampleDir}/${dir}.`);

        } else {

          await fs.promises.rm(oldDirPath, { recursive: true, force: true });

          console.log(`❌ /${dir} deleted.`);

        }

      } else {

        console.log(`➡️ /${dir} does not exist, skipping.`);

      }

    }

    // Create new /app directory

    const newAppDirPath = path.join(root, newAppDir);

    await fs.promises.mkdir(newAppDirPath, { recursive: true });

    console.log("\n📁 New /app directory created.");

    // Create index.tsx

    const indexPath = path.join(newAppDirPath, "index.tsx");

    await fs.promises.writeFile(indexPath, indexContent);

    console.log("📄 app/index.tsx created.");

    // Create _layout.tsx

    const layoutPath = path.join(newAppDirPath, "_layout.tsx");

    await fs.promises.writeFile(layoutPath, layoutContent);

    console.log("📄 app/_layout.tsx created.");

    console.log("\n✅ Project reset complete. Next steps:");

    console.log(

      `1. Run \`npx expo start\` to start a development server.\n2. Edit app/index.tsx to edit the main screen.${

        userInput === "y"

          ? `\n3. Delete the /${exampleDir} directory when you're done referencing it.`

          : ""

      }`

    );

  } catch (error) {

    console.error(`❌ Error during script execution: ${error.message}`);

  }

};

rl.question(

  "Do you want to move existing files to /app-example instead of deleting them? (Y/n): ",

  (answer) => {

    const userInput = answer.trim().toLowerCase() || "y";

    if (userInput === "y" || userInput === "n") {

      moveDirectories(userInput).finally(() => rl.close());

    } else {

      console.log("❌ Invalid input. Please enter 'Y' or 'N'.");

      rl.close();

    }

  }

);