#!/usr/bin/env node
/**
 * Complete MQTT Geofence Integration Test
 *
 * This script:
 * 1. Connects to MQTT broker
 * 2. Creates a test geofence
 * 3. Publishes OwnTracks location messages
 * 4. Triggers geofence events
 * 5. Results in email notifications (if dev server is running)
 */

const mqtt = require('mqtt');
const Database = require('better-sqlite3');
const path = require('path');
const { v4: uuidv4 } = require('uuid');

const dbPath = path.join(__dirname, '..', 'data', 'database.sqlite');

console.log('🧪 Complete MQTT Geofence Integration Test\n');

// Configuration
const CONFIG = {
  mqttBroker: process.env.MQTT_BROKER_URL || 'mqtt://localhost:1883',
  mqttUsername: process.env.MQTT_USERNAME,
  mqttPassword: process.env.MQTT_PASSWORD,

  deviceId: '10',
  userId: 'admin-001',

  // Test geofence (Frankfurt)
  geofenceName: 'MQTT Integration Test Zone',
  geofenceCenter: {
    lat: 50.1109,
    lon: 8.6821,
  },
  geofenceRadius: 500,

  // Test locations to send via MQTT
  testLocations: [
    {
      lat: 50.1200,
      lon: 8.6900,
      label: 'Outside (Start)',
      delay: 1000,
    },
    {
      lat: 50.1109,
      lon: 8.6821,
      label: 'Inside (Enter - should trigger EMAIL)',
      delay: 2000,
    },
    {
      lat: 50.1115,
      lon: 8.6825,
      label: 'Inside (Stay)',
      delay: 2000,
    },
    {
      lat: 50.1200,
      lon: 8.6900,
      label: 'Outside (Exit - should trigger EMAIL)',
      delay: 2000,
    },
  ],
};

// Create test geofence
function createTestGeofence() {
  const db = new Database(dbPath);
  try {
    const geofenceId = uuidv4();

    db.prepare(`
      INSERT INTO Geofence (
        id, name, description, shape_type,
        center_latitude, center_longitude, radius_meters,
        owner_id, device_id, color
      ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
    `).run(
      geofenceId,
      CONFIG.geofenceName,
      'Auto-generated test geofence for MQTT integration test',
      'circle',
      CONFIG.geofenceCenter.lat,
      CONFIG.geofenceCenter.lon,
      CONFIG.geofenceRadius,
      CONFIG.userId,
      CONFIG.deviceId,
      '#8b5cf6'
    );

    console.log(`✓ Created test geofence: "${CONFIG.geofenceName}"`);
    console.log(`  ID: ${geofenceId}`);
    console.log(`  Center: ${CONFIG.geofenceCenter.lat}, ${CONFIG.geofenceCenter.lon}`);
    console.log(`  Radius: ${CONFIG.geofenceRadius}m\n`);

    return geofenceId;
  } finally {
    db.close();
  }
}

// Create OwnTracks location message
function createOwnTracksMessage(lat, lon) {
  return {
    _type: 'location',
    tid: CONFIG.deviceId,
    lat: lat,
    lon: lon,
    tst: Math.floor(Date.now() / 1000), // Unix timestamp
    batt: 85,
    vel: 0,
    acc: 10,
  };
}

// Send MQTT message
function publishLocation(client, lat, lon, label) {
  return new Promise((resolve, reject) => {
    const topic = `owntracks/user/${CONFIG.deviceId}`;
    const message = createOwnTracksMessage(lat, lon);
    const payload = JSON.stringify(message);

    console.log(`📡 Publishing location: ${label}`);
    console.log(`   Topic: ${topic}`);
    console.log(`   Coordinates: ${lat}, ${lon}`);

    client.publish(topic, payload, { qos: 1 }, (err) => {
      if (err) {
        console.error(`   ❌ Failed: ${err.message}`);
        reject(err);
      } else {
        console.log(`   ✓ Published\n`);
        resolve();
      }
    });
  });
}

// Wait helper
function wait(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}

// Main test
async function runTest() {
  let geofenceId = null;
  let mqttClient = null;

  try {
    console.log('🔧 Step 1: Creating test geofence...\n');
    geofenceId = createTestGeofence();

    console.log('🔌 Step 2: Connecting to MQTT broker...');
    console.log(`  Broker: ${CONFIG.mqttBroker}\n`);

    const options = {
      clean: true,
      connectTimeout: 10000,
    };

    if (CONFIG.mqttUsername && CONFIG.mqttPassword) {
      options.username = CONFIG.mqttUsername;
      options.password = CONFIG.mqttPassword;
    }

    mqttClient = mqtt.connect(CONFIG.mqttBroker, options);

    // Wait for connection
    await new Promise((resolve, reject) => {
      mqttClient.on('connect', () => {
        console.log('✓ Connected to MQTT broker\n');
        resolve();
      });

      mqttClient.on('error', (error) => {
        console.error('❌ MQTT connection error:', error.message);
        reject(error);
      });

      setTimeout(() => reject(new Error('Connection timeout')), 10000);
    });

    console.log('📤 Step 3: Publishing test locations...\n');
    console.log('⚠️  IMPORTANT: Make sure the dev server is running!');
    console.log('   Run: npm run dev (in another terminal)\n');

    await wait(2000);

    // Publish each test location
    for (let i = 0; i < CONFIG.testLocations.length; i++) {
      const loc = CONFIG.testLocations[i];

      console.log(`[${i + 1}/${CONFIG.testLocations.length}]`);
      await publishLocation(mqttClient, loc.lat, loc.lon, loc.label);
      await wait(loc.delay);
    }

    console.log('📊 Step 4: Test Summary\n');
    console.log('✅ Published 4 MQTT location messages');
    console.log('✅ Expected: 2 email notifications (Enter + Exit)');
    console.log(`✅ Geofence ID: ${geofenceId}\n`);

    console.log('💡 What should happen:');
    console.log('   1. MQTT subscriber receives the messages');
    console.log('   2. Geofence engine detects ENTER and EXIT events');
    console.log('   3. Email notifications are sent to joachim.hummel@gmail.com');
    console.log('   4. Check your inbox!\n');

    console.log('📧 Check events in database:');
    console.log(`   sqlite3 data/database.sqlite "SELECT * FROM GeofenceEvent WHERE geofence_id = '${geofenceId}'"\n`);

    console.log('🗑️  Cleanup:');
    console.log(`   sqlite3 data/database.sqlite "DELETE FROM Geofence WHERE id = '${geofenceId}'"\n`);

    // Disconnect MQTT
    mqttClient.end();
    console.log('✓ Disconnected from MQTT broker');

    console.log('\n✅ Integration test completed!');

  } catch (error) {
    console.error('\n❌ Test failed:', error.message);

    if (error.message.includes('ECONNREFUSED')) {
      console.error('\n💡 MQTT broker is not running or not accessible.');
      console.error('   Check your MQTT_BROKER_URL in .env');
    }

    if (mqttClient) {
      mqttClient.end();
    }

    if (geofenceId) {
      const db = new Database(dbPath);
      try {
        db.prepare('DELETE FROM Geofence WHERE id = ?').run(geofenceId);
        console.log('\n✓ Cleaned up test geofence');
      } finally {
        db.close();
      }
    }

    process.exit(1);
  }
}

// Run
console.log('Starting MQTT integration test...\n');
runTest().then(() => {
  console.log('\nTest script finished.');
  process.exit(0);
}).catch((error) => {
  console.error('Unexpected error:', error);
  process.exit(1);
});