import categorySyncer from './category-syncer.js';
import pictureSyncer from './picture-syncer.js';
import { startServer } from './server.js';

categorySyncer.on('synced', async ({ tree, unprunedTree, changed }) => {
    if (changed) {
        console.log('🎉 Event received: Category tree updated! Root nodes:', tree.length);
    } else {
        console.log('🎉 Event received: Sync finished (no changes). Checking images...');
    }

    // Extract all kBild IDs from unpruned tree (includes all categories)
    const imageIds = [];
    const traverse = (nodes) => {
        for (const node of nodes) {
            if (node.kBild) {
                imageIds.push(node.kBild);
            }
            if (node.children && node.children.length > 0) {
                traverse(node.children);
            }
        }
    };
    traverse(unprunedTree);

    console.log(`🔍 Found ${imageIds.length} images in category tree.`);
    await pictureSyncer.syncImages(imageIds, 'categories');
});

// Trigger immediate sync
categorySyncer.triggerSync();

// Schedule periodic sync
const syncInterval = parseInt(process.env.SYNC_INTERVAL_MS) || 60000;
setInterval(() => {
    categorySyncer.triggerSync();
}, syncInterval);

// Handle graceful shutdown
process.on('SIGINT', () => {
    console.log('\n👋 Bye!');
    process.exit(0);
});

// Start Express server
startServer();