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 {
        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');

        const joinedRooms = client.getRooms();
        console.log(`🏠 Current rooms: ${joinedRooms.length}`);
        joinedRooms.forEach((r) => {
            console.log(`   - ${r.roomId} membership="${r.getMyMembership()}"`);
        });
        console.log('');

        const cmd = (process.env.BOT_COMMAND || '!quote').toLowerCase();
        console.log(`🔊 Listening for command: "${cmd}"`);

        // Auto-accept invites so the bot can be invited into rooms.
        client.on('RoomMember.membership', (event, member) => {
            if (member.userId === userId && member.membership === 'invite') {
                const roomId = event.getRoomId();
                console.log(`📩 Invited to ${roomId}, joining...`);
                client.joinRoom(roomId).catch((err) => {
                    console.error('Failed to join room:', err.message);
                });
            }
        });

        // Respond to messages in any room this bot is a member of.
        client.on('event', (event) => {
            const type = event.getType();
            const eventRoomId = event.getRoomId();

            // Encrypted rooms: the bot has no E2EE support, so command text
            // never arrives as plaintext and cannot be read or answered.
            if (type === 'm.room.encrypted') {
                console.log(`🔒 [${eventRoomId}] encrypted message received. ` +
                    `The bot cannot read E2EE rooms; invite it to an unencrypted room instead.`);
                return;
            }

            if (type !== 'm.room.message') return;

            const sender = event.getSender();
            if (sender === userId) return; // skip replies from ourselves

            const room = eventRoomId ? client.getRoom(eventRoomId) : null;
            if (!room) {
                console.log(`ℹ️ [debug] got m.room.message for unknown room: ${eventRoomId}`);
                return;
            }

            const membership = room.getMyMembership();
            if (membership !== 'join') {
                console.log(`ℹ️ [debug] [${room.roomId}] m.room.message while membership="${membership}" — not replying`);
                return;
            }

            const content = event.getContent();
            if (!content || typeof content.body !== 'string') {
                console.log(`ℹ️ [debug] [${room.roomId}] m.room.message without text body`);
                return;
            }

            const lower = content.body.toLowerCase().trim();
            const matches = lower === cmd || lower.startsWith(cmd + ' ');
            console.log(`💬 [${room.roomId}] <${sender}> "${content.body}" (listening for "${cmd}", match=${matches})`);
            if (!matches) return;

            const quote = quotes[Math.floor(Math.random() * quotes.length)];
            client.sendTextMessage(room.roomId, quote)
                .then(() => console.log(`🎃 [${room.roomId}] ${quote}`))
                .catch((err) => console.error('Failed to send quote:', err.message));
        });

        console.log('🤖 Bot is running!');
        console.log(`   Invite this bot to a room and type ${process.env.BOT_COMMAND || '!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);
})();