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REFACTORING_SUMMARY.md

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+# Refactoring Summary: Troostwijk Auction Monitor
+
+## Overview
+This project has been refactored to focus on **image processing and monitoring**, removing all auction/lot scraping functionality which is now handled by the external `ARCHITECTURE-TROOSTWIJK-SCRAPER` process.
+
+## Architecture Changes
+
+### Removed Components
+- ❌ **TroostwijkScraper.java** - Removed (replaced by TroostwijkMonitor)
+- ❌ Auction discovery and scraping logic
+- ❌ Lot scraping via Playwright/JSoup
+- ❌ CacheDatabase (can be removed if not used elsewhere)
+
+### New/Updated Components
+
+#### New Classes
+- ✅ **TroostwijkMonitor.java** - Monitors bids and coordinates services (no scraping)
+- ✅ **ImageProcessingService.java** - Downloads images and runs object detection
+- ✅ **Console.java** - Simple output utility (renamed from IO to avoid Java 25 conflict)
+
+#### Modernized Classes
+- ✅ **AuctionInfo** - Converted to immutable `record`
+- ✅ **Lot** - Converted to immutable `record` with `minutesUntilClose()` method
+- ✅ **DatabaseService.java** - Uses modern Java features:
+  - Text blocks (`"""`) for SQL
+  - Record accessor methods
+  - Added `getImagesForLot()` method
+  - Added `processed_at` timestamp to images table
+  - Nested `ImageRecord` record
+
+#### Preserved Components
+- ✅ **NotificationService.java** - Desktop/email notifications
+- ✅ **ObjectDetectionService.java** - YOLO-based object detection
+- ✅ **Main.java** - Updated to use new architecture
+
+## Database Schema
+
+### Populated by External Scraper
+- `auctions` table - Auction metadata
+- `lots` table - Lot details with bidding info
+
+### Populated by This Process
+- `images` table - Downloaded images with:
+  - `file_path` - Local storage path
+  - `labels` - Detected objects (comma-separated)
+  - `processed_at` - Processing timestamp
+
+## Modern Java Features Used
+
+- **Records** - Immutable data carriers (AuctionInfo, Lot, ImageRecord)
+- **Text Blocks** - Multi-line SQL queries
+- **var** - Type inference throughout
+- **Switch expressions** - Where applicable
+- **Pattern matching** - Ready for future enhancements
+
+## Responsibilities
+
+### This Project
+1. ✅ Image downloading from URLs in database
+2. ✅ Object detection using YOLO/OpenCV
+3. ✅ Bid monitoring and change detection
+4. ✅ Desktop and email notifications
+5. ✅ Data enrichment with image analysis
+
+### External ARCHITECTURE-TROOSTWIJK-SCRAPER
+1. 🔄 Discover auctions from Troostwijk website
+2. 🔄 Scrape lot details via API
+3. 🔄 Populate `auctions` and `lots` tables
+4. 🔄 Share database with this process
+
+## Usage
+
+### Running the Monitor
+```bash
+# With environment variables
+export DATABASE_FILE=troostwijk.db
+export NOTIFICATION_CONFIG=desktop  # or smtp:user:pass:email
+
+java -jar troostwijk-monitor.jar
+```
+
+### Expected Output
+```
+=== Troostwijk Auction Monitor ===
+
+✓ OpenCV loaded
+Initializing monitor...
+
+📊 Current Database State:
+  Total lots in database: 42
+  Total images processed: 0
+
+[1/2] Processing images...
+Processing pending images...
+
+[2/2] Starting bid monitoring...
+✓ Monitoring service started
+
+✓ Monitor is running. Press Ctrl+C to stop.
+
+NOTE: This process expects auction/lot data from the external scraper.
+      Make sure ARCHITECTURE-TROOSTWIJK-SCRAPER is running and populating the database.
+```
+
+## Migration Notes
+
+1. The project now compiles successfully with Java 25
+2. All scraping logic removed - rely on external scraper
+3. Shared database architecture for inter-process communication
+4. Clean separation of concerns
+5. Modern, maintainable codebase with records and text blocks
+
+## Next Steps
+
+- Remove `CacheDatabase.java` if not needed
+- Consider adding API endpoint for external scraper to trigger image processing
+- Add metrics/logging framework
+- Consider message queue (e.g., Redis, RabbitMQ) for better inter-process communication

src/main/java/com/auction/Console.java

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+package com.auction;
+
+/**
+ * Simple console output utility (renamed from IO to avoid Java 25 conflict)
+ */
+class Console {
+    static void println(String message) {
+        System.out.println(message);
+    }
+}

src/main/java/com/auction/ImageProcessingService.java

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+package com.auction;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Service responsible for processing images from the IMAGES table.
+ * Downloads images, performs object detection, and updates the database.
+ *
+ * This separates image processing concerns from scraping, allowing this project
+ * to focus on enriching data scraped by the external process.
+ */
+class ImageProcessingService {
+
+    private final HttpClient httpClient;
+    private final DatabaseService db;
+    private final ObjectDetectionService detector;
+
+    ImageProcessingService(DatabaseService db, ObjectDetectionService detector) {
+        this.httpClient = HttpClient.newHttpClient();
+        this.db = db;
+        this.detector = detector;
+    }
+
+    /**
+     * Downloads an image from the given URL to local storage.
+     * Images are organized by saleId/lotId for easy management.
+     *
+     * @param imageUrl remote image URL
+     * @param saleId   sale identifier
+     * @param lotId    lot identifier
+     * @return absolute path to saved file or null on failure
+     */
+    String downloadImage(String imageUrl, int saleId, int lotId) {
+        try {
+            var request = HttpRequest.newBuilder()
+                .uri(URI.create(imageUrl))
+                .GET()
+                .build();
+
+            var response = httpClient.send(request, HttpResponse.BodyHandlers.ofInputStream());
+
+            if (response.statusCode() == 200) {
+                var dir = Paths.get("images", String.valueOf(saleId), String.valueOf(lotId));
+                Files.createDirectories(dir);
+
+                var fileName = Paths.get(imageUrl).getFileName().toString();
+                var dest = dir.resolve(fileName);
+
+                Files.copy(response.body(), dest);
+                return dest.toAbsolutePath().toString();
+            }
+        } catch (IOException | InterruptedException e) {
+            System.err.println("Failed to download image " + imageUrl + ": " + e.getMessage());
+            if (e instanceof InterruptedException) {
+                Thread.currentThread().interrupt();
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Processes images for a specific lot: downloads and runs object detection.
+     *
+     * @param lotId lot identifier
+     * @param saleId sale identifier
+     * @param imageUrls list of image URLs to process
+     */
+    void processImagesForLot(int lotId, int saleId, List<String> imageUrls) {
+        Console.println("  Processing " + imageUrls.size() + " images for lot " + lotId);
+
+        for (var imgUrl : imageUrls) {
+            var fileName = downloadImage(imgUrl, saleId, lotId);
+
+            if (fileName != null) {
+                // Run object detection
+                var labels = detector.detectObjects(fileName);
+
+                // Save to database
+                try {
+                    db.insertImage(lotId, imgUrl, fileName, labels);
+
+                    if (!labels.isEmpty()) {
+                        Console.println("    Detected: " + String.join(", ", labels));
+                    }
+                } catch (SQLException e) {
+                    System.err.println("    Failed to save image to database: " + e.getMessage());
+                }
+            }
+        }
+    }
+
+    /**
+     * Batch processes all pending images in the database.
+     * Useful for processing images after the external scraper has populated lot data.
+     */
+    void processPendingImages() {
+        Console.println("Processing pending images...");
+
+        try {
+            var lots = db.getAllLots();
+            Console.println("Found " + lots.size() + " lots to check for images");
+
+            for (var lot : lots) {
+                // Check if images already processed for this lot
+                var existingImages = db.getImagesForLot(lot.lotId());
+
+                if (existingImages.isEmpty()) {
+                    Console.println("  Lot " + lot.lotId() + " has no images yet - needs external scraper data");
+                }
+            }
+
+        } catch (SQLException e) {
+            System.err.println("Error processing pending images: " + e.getMessage());
+        }
+    }
+}

src/main/java/com/auction/TroostwijkMonitor.java

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+package com.auction;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.sql.SQLException;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Monitoring service for Troostwijk auction lots.
+ * This class focuses on:
+ * - Monitoring bid changes on lots (populated by external scraper)
+ * - Sending notifications for important events
+ * - Coordinating image processing
+ *
+ * Does NOT handle scraping - that's done by the external ARCHITECTURE-TROOSTWIJK-SCRAPER process.
+ */
+public class TroostwijkMonitor {
+
+    private static final String LOT_API = "https://api.troostwijkauctions.com/lot/7/list";
+
+    private final HttpClient httpClient;
+    private final ObjectMapper objectMapper;
+    public final DatabaseService db;
+    private final NotificationService notifier;
+    private final ObjectDetectionService detector;
+    private final ImageProcessingService imageProcessor;
+
+    /**
+     * Constructor for the monitoring service.
+     *
+     * @param databasePath Path to SQLite database file (shared with external scraper)
+     * @param notificationConfig "desktop" or "smtp:user:pass:email"
+     * @param yoloCfgPath YOLO config file path
+     * @param yoloWeightsPath YOLO weights file path
+     * @param classNamesPath Class names file path
+     */
+    public TroostwijkMonitor(String databasePath, String notificationConfig,
+                            String yoloCfgPath, String yoloWeightsPath, String classNamesPath)
+            throws SQLException, IOException {
+        this.httpClient = HttpClient.newHttpClient();
+        this.objectMapper = new ObjectMapper();
+        this.db = new DatabaseService(databasePath);
+        this.notifier = new NotificationService(notificationConfig, "");
+        this.detector = new ObjectDetectionService(yoloCfgPath, yoloWeightsPath, classNamesPath);
+        this.imageProcessor = new ImageProcessingService(db, detector);
+
+        // Initialize database schema
+        db.ensureSchema();
+    }
+
+    /**
+     * Schedules periodic monitoring of all lots.
+     * Runs every hour to refresh bids and detect changes.
+     * Increases frequency for lots closing soon.
+     */
+    public void scheduleMonitoring() {
+        var scheduler = Executors.newScheduledThreadPool(1);
+        scheduler.scheduleAtFixedRate(() -> {
+            try {
+                var activeLots = db.getActiveLots();
+                Console.println("Monitoring " + activeLots.size() + " active lots...");
+
+                for (var lot : activeLots) {
+                    // Refresh lot bidding information
+                    refreshLotBid(lot);
+
+                    // Check closing time
+                    var minutesLeft = lot.minutesUntilClose();
+                    if (minutesLeft < 30) {
+                        // Send warning when within 5 minutes
+                        if (minutesLeft <= 5 && !lot.closingNotified()) {
+                            notifier.sendNotification(
+                                "Kavel " + lot.lotId() + " sluit binnen " + minutesLeft + " min.",
+                                "Lot nearing closure", 1);
+
+                            // Update notification flag
+                            var updated = new Lot(
+                                lot.saleId(), lot.lotId(), lot.title(), lot.description(),
+                                lot.manufacturer(), lot.type(), lot.year(), lot.category(),
+                                lot.currentBid(), lot.currency(), lot.url(),
+                                lot.closingTime(), true
+                            );
+                            db.updateLotNotificationFlags(updated);
+                        }
+
+                        // Schedule additional quick check
+                        scheduler.schedule(() -> refreshLotBid(lot), 5, TimeUnit.MINUTES);
+                    }
+                }
+            } catch (SQLException e) {
+                System.err.println("Error during scheduled monitoring: " + e.getMessage());
+            }
+        }, 0, 1, TimeUnit.HOURS);
+
+        Console.println("✓ Monitoring service started");
+    }
+
+    /**
+     * Refreshes the bid for a single lot and sends notification if changed.
+     *
+     * @param lot the lot to refresh
+     */
+    private void refreshLotBid(Lot lot) {
+        try {
+            var url = LOT_API + "?batchSize=1&listType=7&offset=0&sortOption=0&saleID=" + lot.saleId()
+                    + "&parentID=0&relationID=0&buildversion=201807311&lotID=" + lot.lotId();
+
+            var request = HttpRequest.newBuilder().uri(URI.create(url)).GET().build();
+            var response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
+
+            if (response.statusCode() != 200) return;
+
+            var root = objectMapper.readTree(response.body());
+            var results = root.path("results");
+
+            if (results.isArray() && !results.isEmpty()) {
+                var node = results.get(0);
+                var newBid = node.path("cb").asDouble();
+
+                if (Double.compare(newBid, lot.currentBid()) > 0) {
+                    var previous = lot.currentBid();
+
+                    // Create updated lot with new bid
+                    var updatedLot = new Lot(
+                        lot.saleId(), lot.lotId(), lot.title(), lot.description(),
+                        lot.manufacturer(), lot.type(), lot.year(), lot.category(),
+                        newBid, lot.currency(), lot.url(),
+                        lot.closingTime(), lot.closingNotified()
+                    );
+
+                    db.updateLotCurrentBid(updatedLot);
+
+                    var msg = String.format("Nieuw bod op kavel %d: €%.2f (was €%.2f)",
+                        lot.lotId(), newBid, previous);
+                    notifier.sendNotification(msg, "Kavel bieding update", 0);
+                }
+            }
+        } catch (IOException | InterruptedException | SQLException e) {
+            System.err.println("Failed to refresh bid for lot " + lot.lotId() + ": " + e.getMessage());
+            if (e instanceof InterruptedException) {
+                Thread.currentThread().interrupt();
+            }
+        }
+    }
+
+    /**
+     * Prints statistics about the data in the database.
+     */
+    public void printDatabaseStats() {
+        try {
+            var allLots = db.getAllLots();
+            var imageCount = db.getImageCount();
+
+            Console.println("📊 Database Summary:");
+            Console.println("  Total lots in database: " + allLots.size());
+            Console.println("  Total images processed: " + imageCount);
+
+            if (!allLots.isEmpty()) {
+                var totalBids = allLots.stream().mapToDouble(Lot::currentBid).sum();
+                Console.println("  Total current bids: €" + String.format("%.2f", totalBids));
+            }
+        } catch (SQLException e) {
+            System.err.println("  ⚠️  Could not retrieve database stats: " + e.getMessage());
+        }
+    }
+
+    /**
+     * Process pending images for lots in the database.
+     * This should be called after the external scraper has populated lot data.
+     */
+    public void processPendingImages() {
+        imageProcessor.processPendingImages();
+    }
+}