import * as dotenv from 'dotenv';
import { MatrixClient } from 'matrix-js-sdk';
import fs from 'fs';

dotenv.config();

console.log('🚀 Starting Ancestor Quote Bot...\n');

const client = new MatrixClient({
    accessToken: process.env.MATRIX_ACCESS_TOKEN,
    baseUrl: process.env.MATRIX_HOME_SERVER,
});

function loadQuotes() {
    try {
        const quotesFile = './quotes.json';
        if (fs.existsSync(quotesFile)) {
            return JSON.parse(fs.readFileSync(quotesFile, 'utf8'));
        }
    } catch (err) {
        console.error('Error loading quotes:', err.message);
    }
    return [];
}

(async () => {
    const quotes = loadQuotes();
    
    if (quotes.length === 0) {
        console.error('❌ No quotes found! Please ensure quotes.json is present.');
        process.exit(1);
    }

    console.log(`✅ Loaded ${quotes.length} Ancestor quotes`);
    
    const token = process.env.MATRIX_ACCESS_TOKEN;
    const server = process.env.MATRIX_HOME_SERVER;
    
    if (!token || !server) {
        console.error('❌ Missing required environment variables!');
        console.error('   Required: MATRIX_ACCESS_TOKEN, MATRIX_HOME_SERVER');
        console.error('   See .env.example for guidance.');
        process.exit(1);
    }
    console.log(`🏠 Server: ${server}`);
    
    try {
        // The SDK needs to know the bot's own user ID to build request URLs
        // (e.g. /user/$userId/filter). It would otherwise use the literal
        // "$userId" placeholder, which the homeserver rejects. Fetch it via
        // the whoami endpoint before connecting.
        const whoami = await client.whoami();
        const userId = whoami.user_id;

        if (!userId || !userId.startsWith('@')) {
            console.error(`❌ whoami returned invalid user ID: ${userId}`);
            process.exit(1);
        }

        client.credentials.userId = userId;
        console.log(`👤 Bot Identity: ${userId}`);

        await client.startClient();
        console.log('✅ MatrixClient connected and authenticated\n');
        
        let lastSentMessage = null;

        client.on('RoomMember#joined', async (member) => {
            const room = member.room;
            console.log(`✅ Room: ${room.getCanonicalRoomName() || room.roomId}`);

            room.on('EventMessage', async (event, stateEvent) => {
                const content = event.getContent();
                if (!content || !content.body) return;

                const body = content.body.toLowerCase().trim();
                const cmd = (process.env.BOT_COMMAND || '!quote').toLowerCase();

                if (body === cmd || body.startsWith(cmd)) {
                    if (!lastSentMessage || Date.now() - lastSentMessage > 300) {
                        const quote = quotes[Math.floor(Math.random() * quotes.length)];
                        try {
                            await room.sendMessage(quote);
                            console.log(`🎃 Quote: ${quote}`);
                            lastSentMessage = Date.now();
                        } catch (err) {
                            console.error('Failed to send quote:', err.message);
                        }
                    }
                }
            });

            member.room.on('RoomMember#left', () => {
                console.log(`ℹ️ Left: ${room.getCanonicalRoomName() || room.roomId}`);
            });
        });

        console.log('🤖 Bot is running!');
        console.log('   Invite this bot to a Matrix room and type !quote to get an Ancestor quote.\n');

    } catch (err) {
        console.error('❌ Fatal error starting bot:', err.message);
        console.error(err.stack);
        process.exit(1);
    }
    
    process.on('unhandledRejection', (reason, promise) => {
        console.error('🚨 Unhandled rejection:', reason?.message || reason);
        process.exit(1);
    });
    
    setInterval(() => {}, 60000);
})();