/**
 * QUIXZOOM AI Detection API
 * 
 * Endpoint för objektdetektering i bilder och video.
 * Stödjer: YOLO, Cloud Vision, Custom Models
 */

const express = require('express');
const router = express.Router();
const YOLODetector = require('../video-to-observation/yolo-detector');
const CloudVisionDetector = require('../video-to-observation/cloud-vision');

// Initiera detektorer
const yolo = new YOLODetector();
const cloudVision = new CloudVisionDetector();

/**
 * POST /api/detect
 * Detektera objekt i bild
 */
router.post('/detect', async (req, res) => {
  try {
    const { imageUrl, model = 'yolo', confidence = 0.5 } = req.body;
    
    if (!imageUrl) {
      return res.status(400).json({ error: 'imageUrl required' });
    }
    
    let detections;
    
    switch (model) {
      case 'yolo':
        detections = await yolo.detect(imageUrl);
        break;
      case 'cloud-vision':
        detections = await cloudVision.detect(imageUrl);
        break;
      default:
        return res.status(400).json({ error: 'Unknown model' });
    }
    
    // Filtrera på confidence
    const filtered = detections.filter(d => d.confidence >= confidence);
    
    res.json({
      success: true,
      model,
      detections: filtered,
      count: filtered.length,
    });
    
  } catch (error) {
    res.status(500).json({
      success: false,
      error: error.message,
    });
  }
});

/**
 * POST /api/detect/batch
 * Batch-detektion på flera bilder
 */
router.post('/detect/batch', async (req, res) => {
  try {
    const { imageUrls, model = 'yolo' } = req.body;
    
    if (!imageUrls || !Array.isArray(imageUrls)) {
      return res.status(400).json({ error: 'imageUrls array required' });
    }
    
    const detector = model === 'cloud-vision' ? cloudVision : yolo;
    const results = await detector.detectBatch(imageUrls);
    
    res.json({
      success: true,
      model,
      results,
      totalDetections: results.reduce((sum, r) => sum + r.objects.length, 0),
    });
    
  } catch (error) {
    res.status(500).json({
      success: false,
      error: error.message,
    });
  }
});

/**
 * GET /api/models
 * Lista tillgängliga modeller
 */
router.get('/models', (req, res) => {
  res.json({
    models: [
      {
        id: 'yolo',
        name: 'YOLOv8',
        description: 'Fast local detection',
        available: yolo.available,
        classes: ['traffic_sign', 'tree', 'bench'],
      },
      {
        id: 'cloud-vision',
        name: 'Google Cloud Vision',
        description: 'High accuracy cloud detection',
        available: cloudVision.available,
        classes: ['street_lamp', 'traffic_sign', 'tree', 'manhole', 'utility_box', 'bench'],
      },
      {
        id: 'custom-yolo',
        name: 'Custom YOLO (QUIXZOOM)',
        description: 'Trained on infrastructure objects',
        available: false,
        classes: ['street_lamp', 'traffic_sign', 'tree', 'manhole', 'utility_box', 'bench'],
      },
    ],
  });
});

module.exports = router;