import readline from 'readline';
import { io } from 'socket.io-client';

const API_URL = process.env.API_URL || 'http://localhost:4010/api';
const TENANT_ID = process.env.TENANT_ID || 'siro';

async function api(method, path, body = null, token = null) {
  const options = {
    method,
    headers: {
      'Content-Type': 'application/json',
      'x-tenant-id': TENANT_ID,
      'x-device-id': 'simulated-device-123'
    }
  };

  if (token) options.headers['Authorization'] = `Bearer ${token}`;
  if (body) options.body = JSON.stringify(body);

  const res = await fetch(`${API_URL}${path}`, options);
  const data = await res.json().catch(() => null);

  if (!res.ok) {
    console.error(`\n\x1b[31m[API Error] ${method} ${path} -> ${res.status}\x1b[0m`);
    console.error(JSON.stringify(data, null, 2));
    throw new Error(`API Error: ${res.status}`);
  }
  return data;
}

async function run() {
  try {
    console.log('\n==========================================');
    console.log('🚀 Tripz Backend Automated E2E Simulation');
    console.log('==========================================\n');

    // 1. Authenticate Demo Driver
    const driverPhone = '+962790000001';
    console.log(`[Driver] Authenticating Demo Driver (${driverPhone})...`);
    const driverAuth = await api('POST', '/auth/verify-otp', { phone: driverPhone, code: '1234' });
    const driverToken = driverAuth.access_token;
    console.log('\x1b[32m[Driver] Authenticated successfully!\x1b[0m\n');

    // 2. Authenticate Demo Rider
    const riderPhone = '+962790000002';
    console.log(`[Rider] Authenticating Demo Rider (${riderPhone})...`);
    const riderAuth = await api('POST', '/auth/verify-otp', { phone: riderPhone, code: '1234' });
    const riderToken = riderAuth.access_token;
    console.log('\x1b[32m[Rider] Authenticated successfully!\x1b[0m\n');

    // 3. Setup Driver Profile & Go Online
    console.log(`[Driver] Creating Driver profile...`);
    await api('POST', '/drivers/apply', { service_class: 'economy', vehicle_make: 'Toyota', vehicle_model: 'Prius', vehicle_plate: '12-3456' }, driverToken);
    
    console.log(`[Driver] Going Online...`);
    await api('PATCH', '/drivers/status', { online: true }, driverToken);
    console.log('\x1b[32m[Driver] Profile created and is now ONLINE.\x1b[0m\n');

    // 4. Connect WebSockets
    console.log(`[Sockets] Connecting Rider and Driver via WebSockets...`);
    const WS_URL = API_URL.replace('/api', '');
    const driverSocket = io(WS_URL, { extraHeaders: { Authorization: `Bearer ${driverToken}` } });
    const riderSocket = io(WS_URL, { extraHeaders: { Authorization: `Bearer ${riderToken}` } });

    let tripId = null;

    // Sockets Error Logging
    driverSocket.on('connect_error', (err) => console.error(`\x1b[31m[Driver WS] Error: ${err.message}\x1b[0m`));
    riderSocket.on('connect_error', (err) => console.error(`\x1b[31m[Rider WS] Error: ${err.message}\x1b[0m`));

    driverSocket.on('connect', () => console.log('\x1b[36m[Driver WS] Connected to Gateway\x1b[0m'));
    riderSocket.on('connect', () => console.log('\x1b[36m[Rider WS] Connected to Gateway\x1b[0m'));

    driverSocket.on('trip:offer', async (data) => {
      console.log(`\n\x1b[35m[Driver WS] 🔔 RECEIVED OFFER for Trip ${data.tripId || data.id}!\x1b[0m`);
      console.log(`Offer Payload:`, JSON.stringify(data, null, 2));
      tripId = data.tripId || data.id;

      try {
        console.log(`[Driver] Accepting Trip...`);
        await api('POST', `/trips/${tripId}/accept`, null, driverToken);
        console.log(`\x1b[32m[Driver] Trip Accepted successfully!\x1b[0m`);
      } catch (err) {
        console.error(`\x1b[31m[Driver] Failed to accept trip!\x1b[0m`);
      }
    });

    riderSocket.on('trip:update', (data) => {
      console.log(`\x1b[33m[Rider WS] Trip status updated: ${data.status}\x1b[0m`);
    });

    await new Promise(r => setTimeout(r, 2000));

    // 5. Driver Location Pings
    let driverLat = 32.0645;
    let driverLng = 36.0827;

    const locationInterval = setInterval(() => {
      driverLat += 0.0001;
      driverSocket.emit('driver:location', { lat: driverLat, lng: driverLng, speed: 40, heading: 90 });
      console.log(`[Driver WS] 📍 Location ping: ${driverLat.toFixed(5)}, ${driverLng.toFixed(5)}`);
    }, 3000);

    // Send first ping IMMEDIATELY
    driverSocket.emit('driver:location', { lat: driverLat, lng: driverLng, speed: 40, heading: 90 });
    console.log(`[Driver WS] 📍 Initial Location ping: ${driverLat.toFixed(5)}, ${driverLng.toFixed(5)}`);
    
    // Wait for the server to process the location update into Redis
    await new Promise(r => setTimeout(r, 1500));

    // 6. Rider Requests Trip
    console.log(`\n[Rider] Requesting Trip from Zarqa...`);
    const tripRequest = await api('POST', '/trips', {
      city: 'amman',
      service_class: 'economy',
      origin: { lat: 32.0650, lng: 36.0830 },
      destination: { lat: 32.0700, lng: 36.0900 }
    }, riderToken);

    console.log(`\x1b[32m[Rider] Trip created: ${tripRequest.trip?.id || tripRequest.id}\x1b[0m`);
    console.log(`[System] Offered to \x1b[33m${tripRequest.offeredDrivers}\x1b[0m drivers nearby.`);

    // 7. Simulate Trip Flow
    await new Promise(r => setTimeout(r, 10000));
    
    if (tripId) {
      try {
        console.log(`\n[Driver] Arriving at pickup...`);
        await api('PATCH', `/trips/${tripId}/status`, { status: 'driver_arrived' }, driverToken);
        await new Promise(r => setTimeout(r, 5000));

        console.log(`\n[Driver] Starting Trip...`);
        await api('PATCH', `/trips/${tripId}/status`, { status: 'in_progress' }, driverToken);
        await new Promise(r => setTimeout(r, 5000));

        console.log(`\n[Driver] Completing Trip...`);
        await api('PATCH', `/trips/${tripId}/status`, { status: 'completed' }, driverToken);

        console.log(`\n\x1b[32m🎉 E2E Simulation Completed Successfully!\x1b[0m\n`);
      } catch(e) {
         console.error(`\x1b[31m[Simulation Error] ${e.message}\x1b[0m`);
      }
    } else {
      console.log(`\n\x1b[31mFailed to receive offer!\x1b[0m`);
      console.log(`[Hint] Check if offeredDrivers was 0. If it was 0, the backend didn't find the driver in Redis. If it was > 0, the backend emitted the socket event but the driver didn't receive it.\n`);
    }

    clearInterval(locationInterval);
    driverSocket.disconnect();
    riderSocket.disconnect();
    process.exit(0);
  } catch (error) {
    console.error(`\n\x1b[31m[Fatal Error] Simulation Crashed: ${error.message}\x1b[0m\n`);
    process.exit(1);
  }
}

run();