import * as fs from 'fs';
import * as path from 'path';
import axios from 'axios';

// Constants
const API_URL = process.env.TEST_API_URL || 'https://map-saas.intaleqapp.com/api/geocoding/search';
const API_KEY = process.env.TEST_API_KEY || process.env.MAP_API_KEY || '';
let DATA_FILE = path.join(__dirname, '../../../data/golden_tests/queries_syria.json');
if (!fs.existsSync(DATA_FILE) && fs.existsSync('/data/data/golden_tests/queries_syria.json')) {
  DATA_FILE = '/data/data/golden_tests/queries_syria.json'; // Docker environment fallback
}

// Interface for Test Query
interface TestQuery {
  query: string;
  expected_location: {
    lat: number;
    lon: number;
  };
  expected_category?: string;
  tolerance_meters: number;
}

// Interface for API Result
interface SearchResult {
  place_id: number;
  name: string;
  latitude: number | string;
  longitude: number | string;
  category: string;
  type: string;
  distance?: number;
}

// Haversine Formula to calculate distance in meters
function calculateDistance(lat1: number, lon1: number, lat2: number, lon2: number): number {
  const R = 6371e3; // Earth radius in meters
  const φ1 = (lat1 * Math.PI) / 180;
  const φ2 = (lat2 * Math.PI) / 180;
  const Δφ = ((lat2 - lat1) * Math.PI) / 180;
  const Δλ = ((lon2 - lon1) * Math.PI) / 180;

  const a =
    Math.sin(Δφ / 2) * Math.sin(Δφ / 2) +
    Math.cos(φ1) * Math.cos(φ2) * Math.sin(Δλ / 2) * Math.sin(Δλ / 2);
  const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));

  return R * c;
}

async function runEvaluation() {
  console.log('🚀 Starting Geocoding Evaluation (Golden Test Set)...\n');

  if (!fs.existsSync(DATA_FILE)) {
    console.error(`❌ Data file not found at ${DATA_FILE}`);
    process.exit(1);
  }

  const rawData = fs.readFileSync(DATA_FILE, 'utf8');
  const queries: TestQuery[] = JSON.parse(rawData);

  let top1Hits = 0;
  let top3Hits = 0;
  let zeroResults = 0;
  let latencies: number[] = [];

  for (const test of queries) {
    console.log(`Testing query: "${test.query}"`);
    
    const startTime = Date.now();
    try {
      const response = await axios.get(API_URL, {
        headers: { 'x-api-key': API_KEY },
        params: { q: test.query, country: 'syria' }
      });
      
      const latency = Date.now() - startTime;
      latencies.push(latency);
      
      const results: SearchResult[] = response.data.results || response.data;
      
      if (!results || results.length === 0) {
        console.log(`   ❌ Zero results returned.`);
        zeroResults++;
        continue;
      }

      let foundInTop1 = false;
      let foundInTop3 = false;

      for (let i = 0; i < Math.min(results.length, 3); i++) {
        const res = results[i];
        const resLat = Number(res.latitude || (res as any).lat);
        const resLon = Number(res.longitude || (res as any).lon);
        
        const dist = calculateDistance(test.expected_location.lat, test.expected_location.lon, resLat, resLon);
        const isMatch = dist <= test.tolerance_meters;

        console.log(`     [Rank ${i + 1}] Name: "${res.name_ar || res.name}" | Dist: ${Math.round(dist)}m | Source: ${res.source} | Category: ${res.category}`);

        if (isMatch) {
          if (i === 0) foundInTop1 = true;
          foundInTop3 = true;
          console.log(`   ✅ Match found at rank ${i + 1} (Distance: ${Math.round(dist)}m)`);
          // We found the match, but we still print the rest for debugging
        }
      }

      if (!foundInTop3) {
        const topDist = calculateDistance(test.expected_location.lat, test.expected_location.lon, Number(results[0].latitude || (results[0] as any).lat), Number(results[0].longitude || (results[0] as any).lon));
        console.log(`   ❌ No match in Top-3. Top result distance: ${Math.round(topDist)}m`);
      }

      if (foundInTop1) top1Hits++;
      if (foundInTop3) top3Hits++;

    } catch (error: any) {
      console.error(`   ❌ API Error: ${error.message}`);
    }
  }

  // Calculate metrics
  latencies.sort((a, b) => a - b);
  const p50 = latencies[Math.floor(latencies.length * 0.5)] || 0;
  const p95 = latencies[Math.floor(latencies.length * 0.95)] || 0;
  
  const total = queries.length;

  console.log('\n=======================================');
  console.log('📊 EVALUATION RESULTS');
  console.log('=======================================');
  console.log(`Total Queries   : ${total}`);
  console.log(`Top-1 Accuracy  : ${((top1Hits / total) * 100).toFixed(1)}% (${top1Hits}/${total})`);
  console.log(`Top-3 Accuracy  : ${((top3Hits / total) * 100).toFixed(1)}% (${top3Hits}/${total})`);
  console.log(`Zero Results    : ${((zeroResults / total) * 100).toFixed(1)}% (${zeroResults}/${total})`);
  console.log(`p50 Latency     : ${p50} ms`);
  console.log(`p95 Latency     : ${p95} ms`);
  console.log('=======================================\n');
}

runEvaluation().catch(console.error);