const fs = require('fs');
const path = require('path');
const os = require('os');

const extensions = new Map();

async function loadExtensions() {
    const homeDir = os.homedir();
    const extensionsDir = path.join(homeDir, 'WaifuBoards', 'extensions');

    if (!fs.existsSync(extensionsDir)) {
        console.log("⚠️  Extensions directory not found, skipping...");
        return;
    }

    try {
        const files = await fs.promises.readdir(extensionsDir);

        for (const file of files) {
            if (file.endsWith('.js')) {
                const filePath = path.join(extensionsDir, file);

                try {
                    delete require.cache[require.resolve(filePath)];

                    const ExtensionClass = require(filePath);
                    const instance = typeof ExtensionClass === 'function'
                        ? new ExtensionClass()
                        : (ExtensionClass.default ? new ExtensionClass.default() : null);

                    if (instance && (instance.type === "anime-board" || instance.type === "book-board")) {
                        const name = instance.constructor.name;
                        extensions.set(name, instance);
                        console.log(`📦 Loaded Extension: ${name}`);
                    }
                } catch (e) {
                    console.error(`❌ Failed to load extension ${file}:`, e.message);
                }
            }
        }

        console.log(`✅ Loaded ${extensions.size} extensions`);
    } catch (err) {
        console.error("❌ Extension Scan Error:", err);
    }
}

function getExtension(name) {
    return extensions.get(name);
}

function getAllExtensions() {
    return extensions;
}

function getExtensionsList() {
    return Array.from(extensions.keys());
}

module.exports = {
    loadExtensions,
    getExtension,
    getAllExtensions,
    getExtensionsList
};