import { watch } from 'node:fs/promises';
import { discoverDocuments } from "./discover.js";
import log from "./log.js";
/**
 * Watch for file changes and re-discover documents when settings.json changes
 * @param onDiscoveryChange - Callback when discovery changes, receives new discovery result
 */
export function watchForChanges(onDiscoveryChange) {
    ;
    (async () => {
        try {
            const watcher = watch(process.cwd(), { recursive: true });
            for await (const event of watcher) {
                // Skip node_modules and other ignored directories
                if (event.filename?.includes('node_modules') ||
                    event.filename?.includes('.git') ||
                    event.filename?.startsWith('.')) {
                    continue;
                }
                // Re-discover documents when settings.json files change
                if (event.filename?.endsWith('settings.json')) {
                    try {
                        const discovery = await discoverDocuments(process.cwd(), { throwOnEmpty: true });
                        log.info(`🔄 Re-discovered ${discovery.documents.size} document(s) (${event.filename})`);
                        onDiscoveryChange(discovery);
                    }
                    catch (error) {
                        log.error('❌ Error re-discovering documents:', error);
                    }
                }
                else {
                    // Just log the change for other files - they'll be loaded fresh on next request
                    log.info(`🔄 File changed: ${event.filename}`);
                }
            }
        }
        catch (error) {
            if (error.code !== 'ERR_USE_AFTER_CLOSE') {
                log.error('Error watching files:', error);
            }
        }
    })();
}
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