const API_URL = 'https://alpenqueue.maxtheweb.com';
const SSE_URL = 'https://maxtheweb.com/events';

let eventSource = null;
let currentJobId = null;
let jobsQueued = 0;
let resultsReceived = 0;

// Initialize SSE connection
function initSSE() {
    if (eventSource) {
        eventSource.close();
    }

    eventSource = new EventSource(SSE_URL);

    eventSource.onopen = function() {
        console.log('SSE connection established');
        updateConnectionStatus('connected');
    };

    eventSource.onmessage = function(event) {
        try {
            const data = JSON.parse(event.data);

            if (data.type === 'connected') {
                console.log('SSE handshake complete');
                return;
            }

            if (data.type === 'result') {
                displayResult(data);
            }
        } catch (error) {
            console.error('Error parsing SSE message:', error);
        }
    };

    eventSource.onerror = function(error) {
        console.error('SSE error:', error);
        updateConnectionStatus('disconnected');

        // Reconnect after 5 seconds
        setTimeout(() => {
            if (eventSource.readyState === EventSource.CLOSED) {
                initSSE();
            }
        }, 5000);
    };
}

function updateConnectionStatus(status) {
    const indicator = document.getElementById('connection-status');
    if (!indicator) return;

    indicator.className = 'connection-status ' + status;
    indicator.textContent = status === 'connected' ? '● Live' : '○ Reconnecting...';
}

function displayResult(data) {
    const resultsContainer = document.getElementById('live-results');
    if (!resultsContainer) return;

    // Remove the "no results" message if it exists
    const noResults = resultsContainer.querySelector('.no-results');
    if (noResults) {
        noResults.remove();
    }

    // Increment results received counter
    resultsReceived++;
    document.getElementById('results-received').textContent = resultsReceived;

    const resultDiv = document.createElement('div');
    resultDiv.className = 'result-item ' + (data.status || 'ok');

    const timestamp = new Date(data.timestamp).toLocaleTimeString();

    resultDiv.innerHTML = `
        <div class="result-header">
            <span class="result-status ${data.status || 'ok'}">${(data.status || 'OK').toUpperCase()}</span>
            <span class="result-time">${timestamp} · ${data.took || '0s'}</span>
        </div>
        <div class="result-url">${data.url}</div>
        <div class="result-content">
            ${data.content ? `<pre>${escapeHtml(data.content.substring(0, 500))}${data.content.length > 500 ? '...' : ''}</pre>` : '<em>No content extracted</em>'}
        </div>
    `;

    // Add to top of results
    resultsContainer.insertBefore(resultDiv, resultsContainer.firstChild);

    // Limit to 10 results
    while (resultsContainer.children.length > 10) {
        resultsContainer.removeChild(resultsContainer.lastChild);
    }

    // Highlight animation
    resultDiv.style.animation = 'slideIn 0.3s ease-out';
}

function escapeHtml(text) {
    const div = document.createElement('div');
    div.textContent = text;
    return div.innerHTML;
}

// Handle form submission
document.getElementById('queue-form').addEventListener('submit', async (e) => {
    e.preventDefault();

    const submitBtn = document.getElementById('submit-btn');
    const responseDiv = document.getElementById('response');

    // Get form values
    const url = document.getElementById('url').value;
    const selector = document.getElementById('selector').value;

    // Use our own webhook endpoint
    const webhook = 'https://maxtheweb.com/webhook';

    // Update UI
    submitBtn.disabled = true;
    submitBtn.textContent = 'Queueing...';
    responseDiv.className = 'response-box loading';
    responseDiv.innerHTML = '<div class="spinner"></div> Sending to AlpenQueue...';

    try {
        // Build the job payload
        const jobData = {
            url: url,
            selector: selector,  // AlpenQueue expects a single string
            webhook_url: webhook  // AlpenQueue expects webhook_url, not callback_url
        };

        // Send to AlpenQueue API
        const response = await fetch(`${API_URL}/jobs`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
            },
            body: JSON.stringify(jobData)
        });

        if (response.ok) {
            // AlpenQueue returns plain text like "Job 7 created"
            const resultText = await response.text();
            const jobIdMatch = resultText.match(/Job (\d+) created/);
            const jobId = jobIdMatch ? jobIdMatch[1] : 'Processing';
            currentJobId = jobId;

            // Increment jobs queued counter
            jobsQueued++;
            document.getElementById('jobs-queued').textContent = jobsQueued;

            responseDiv.className = 'response-box success';
            responseDiv.innerHTML = `
                <div class="success-icon">✓</div>
                <div class="response-content">
                    <strong>Job Queued!</strong><br>
                    Job ID: <code>${jobId}</code><br>
                    Results will appear below in real-time...
                </div>
            `;
        } else {
            throw new Error(`Server responded with ${response.status}`);
        }
    } catch (error) {
        responseDiv.className = 'response-box error';
        responseDiv.innerHTML = `
            <div class="error-icon">✕</div>
            <div class="response-content">
                <strong>Error:</strong><br>
                ${error.message}<br>
                <small>Check the console for details</small>
            </div>
        `;
        console.error('AlpenQueue Error:', error);
    } finally {
        submitBtn.disabled = false;
        submitBtn.textContent = 'Queue it →';
    }
});

// Initialize on load
window.addEventListener('load', () => {
    // Pre-fill with a demo example
    document.getElementById('url').value = 'https://news.ycombinator.com';
    document.getElementById('selector').value = '.athing .titleline';

    // Start SSE connection
    initSSE();
});

// Cleanup on page unload
window.addEventListener('beforeunload', () => {
    if (eventSource) {
        eventSource.close();
    }
});