// API communication functions

async function scrapeNextListing() {
    if (!AppState.currentSessionId || !AppState.isScrapingActive) {
        console.log('Scraping stopped: session or active flag cleared');
        return false;
    }

    try {
        const response = await fetch(`${API_BASE_URL}/api/scrape/${AppState.currentSessionId}`);
        const data = await response.json();

        if (data.cancelled) {
            console.log('Scraping cancelled by backend');
            return false;
        }

        if (data.listing) {
            AppState.allListings.push(data.listing);
            addMarker(data.listing);

            // Update display
            const sortBy = document.getElementById('sortSelect').value;
            const sortedListings = sortListings(AppState.allListings, sortBy);
            renderResults(sortedListings);

            // Fit map to markers
            if (AppState.markers.length > 0) {
                const group = L.featureGroup(AppState.markers);
                AppState.map.fitBounds(group.getBounds().pad(0.1));
            }
        }

        updateProgress(data.progress.current, data.progress.total);

        if (data.complete) {
            console.log('Scraping complete, finalizing...');
            AppState.isScrapingActive = false;
            document.getElementById('searchBtn').disabled = false;
            document.getElementById('cancelBtn').style.display = 'none';
            updateProgress(0, 0);
            showStatus(`Fertig! ${AppState.allListings.length} Inserate geladen`, 'success');
            console.log('Final listings count:', AppState.allListings.length);
            return false;
        }

        return true;

    } catch (error) {
        console.error('Scrape error:', error);
        AppState.isScrapingActive = false;
        document.getElementById('searchBtn').disabled = false;
        document.getElementById('cancelBtn').style.display = 'none';
        showStatus('Fehler beim Laden der Inserate', 'error');
        return false;
    }
}

async function startScrapingLoop() {
    while (AppState.isScrapingActive && AppState.currentSessionId) {
        const shouldContinue = await scrapeNextListing();
        if (!shouldContinue) {
            break;
        }
        await new Promise(resolve => setTimeout(resolve, 100));
    }
}

async function searchListings() {
    const searchTerm = document.getElementById('searchTerm').value.trim();
    const minPrice = parseInt(document.getElementById('minPrice').value) || 0;
    const maxPriceInput = document.getElementById('maxPrice').value;
    const maxPrice = maxPriceInput ? parseInt(maxPriceInput) : 1000000000;
    const numListings = parseInt(document.getElementById('numListings').value) || 25;
    const powerSearchDescriptionTerm = document.getElementById('powerSearchDescTerm').value.trim();

    if (!searchTerm) {
        showStatus('Bitte Suchbegriff eingeben', 'error');
        return;
    }

    document.getElementById('searchBtn').disabled = true;
    clearMarkers();
    AppState.allListings = [];
    AppState.selectedListingId = null;
    document.getElementById('resultsList').innerHTML = '';

    showStatus('Suche nach Inseraten...', 'loading');

    try {
        const response = await fetch(`${API_BASE_URL}/api/search`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({
                search_term: searchTerm,
                min_price: minPrice,
                max_price: maxPrice,
                num_listings: numListings,
                search_term_desc: powerSearchDescriptionTerm
            })
        });

        if (!response.ok) {
            throw new Error('API request failed');
        }

        const data = await response.json();
        AppState.currentSessionId = data.session_id;

        if (data.total === 0) {
            showStatus('Keine Inserate gefunden', 'error');
            document.getElementById('searchBtn').disabled = false;
            return;
        }

        showStatus(`${data.total} Inserate gefunden. Lade Details...`, 'success');

        // Show cancel button
        document.getElementById('cancelBtn').style.display = 'inline-block';

        // Start scraping
        AppState.isScrapingActive = true;
        AppState.scrapeStartTime = Date.now();
        updateProgress(0, data.total);
        startScrapingLoop();

    } catch (error) {
        console.error('Search error:', error);
        showStatus('Fehler: Verbindung zum Server fehlgeschlagen', 'error');
        document.getElementById('searchBtn').disabled = false;
    }
}

async function cancelScraping() {
    if (!AppState.currentSessionId) return;

    try {
        await fetch(`${API_BASE_URL}/api/scrape/${AppState.currentSessionId}/cancel`, {
            method: 'POST'
        });

        AppState.isScrapingActive = false;
        document.getElementById('searchBtn').disabled = false;
        document.getElementById('cancelBtn').style.display = 'none';
        updateProgress(0, 0);
        showStatus(`Abgebrochen. ${AppState.allListings.length} Inserate geladen`, 'error');

    } catch (error) {
        console.error('Cancel error:', error);
    }
}