/* Logs page JavaScript */

// Logs State
let isStreaming = true;
let autoScroll = true;
let logCounts = { debug: 0, info: 0, warn: 0, error: 0, fatal: 0 };
let searchDebounceTimer = null;
let currentFilters = {
    level: 'all',
    service: 'all',
    search: ''
};
let logsWs = null;

function initLogsWebSocket() {
    const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
    logsWs = new WebSocket(`${protocol}//${window.location.host}/ws/logs`);

    logsWs.onopen = function() {
        updateLogsConnectionStatus('connected', 'Connected');
    };

    logsWs.onclose = function() {
        updateLogsConnectionStatus('disconnected', 'Disconnected');
        // Reconnect after 3 seconds
        setTimeout(initLogsWebSocket, 3000);
    };

    logsWs.onerror = function() {
        updateLogsConnectionStatus('disconnected', 'Error');
    };

    logsWs.onmessage = function(event) {
        if (!isStreaming) return;

        try {
            const logData = JSON.parse(event.data);
            appendLog(logData);
        } catch (e) {
            console.error('Failed to parse log message:', e);
        }
    };
}

function updateLogsConnectionStatus(status, text) {
    const statusEl = document.getElementById('connection-status');
    if (statusEl) {
        statusEl.className = `connection-status ${status}`;
        statusEl.querySelector('.status-text').textContent = text;
    }
}

function appendLog(log) {
    const stream = document.getElementById('log-stream');
    if (!stream) return;

    const placeholder = stream.querySelector('.log-placeholder');
    if (placeholder) {
        placeholder.remove();
    }

    const entry = document.createElement('div');
    entry.className = 'log-entry';
    entry.dataset.level = log.level || 'info';
    entry.dataset.service = log.service || 'unknown';
    entry.dataset.id = log.id || Date.now();

    entry.innerHTML = `
        <span class="log-timestamp">${formatLogTimestamp(log.timestamp)}</span>
        <span class="log-level">${(log.level || 'INFO').toUpperCase()}</span>
        <span class="log-service">${log.service || 'unknown'}</span>
        <span class="log-message">${escapeLogHtml(log.message || '')}</span>
        <button class="log-expand" onclick="expandLog(this)" title="View details">
            <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                <polyline points="9 18 15 12 9 6"></polyline>
            </svg>
        </button>
    `;

    // Store full log data for detail view
    entry._logData = log;

    // Apply current filters
    if (!matchesLogFilters(entry)) {
        entry.classList.add('hidden');
    }

    stream.appendChild(entry);

    // Update counts
    const level = log.level || 'info';
    if (logCounts[level] !== undefined) {
        logCounts[level]++;
        const countEl = document.getElementById(`${level}-count`);
        if (countEl) countEl.textContent = logCounts[level];
    }
    const totalEl = document.getElementById('total-count');
    if (totalEl) {
        totalEl.textContent = Object.values(logCounts).reduce((a, b) => a + b, 0);
    }

    // Auto-scroll to bottom
    if (autoScroll) {
        stream.scrollTop = stream.scrollHeight;
    }

    // Limit log entries to prevent memory issues
    const maxEntries = 1000;
    while (stream.children.length > maxEntries) {
        const removed = stream.firstChild;
        if (removed._logData) {
            const removedLevel = removed._logData.level || 'info';
            if (logCounts[removedLevel] > 0) {
                logCounts[removedLevel]--;
            }
        }
        stream.removeChild(removed);
    }
}

function formatLogTimestamp(timestamp) {
    if (!timestamp) return '--';
    const date = new Date(timestamp);
    return date.toISOString().replace('T', ' ').slice(0, 23);
}

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

function matchesLogFilters(entry) {
    // Level filter
    if (currentFilters.level !== 'all' && entry.dataset.level !== currentFilters.level) {
        return false;
    }

    // Service filter
    if (currentFilters.service !== 'all' && entry.dataset.service !== currentFilters.service) {
        return false;
    }

    // Search filter
    if (currentFilters.search) {
        const text = entry.textContent.toLowerCase();
        if (!text.includes(currentFilters.search.toLowerCase())) {
            return false;
        }
    }

    return true;
}

function applyLogFilters() {
    currentFilters.level = document.getElementById('log-level-filter')?.value || 'all';
    currentFilters.service = document.getElementById('service-filter')?.value || 'all';

    const entries = document.querySelectorAll('.log-entry');
    entries.forEach(entry => {
        if (matchesLogFilters(entry)) {
            entry.classList.remove('hidden');
        } else {
            entry.classList.add('hidden');
        }
    });
}

function debounceLogSearch(value) {
    clearTimeout(searchDebounceTimer);
    searchDebounceTimer = setTimeout(() => {
        currentFilters.search = value;
        applyLogFilters();
    }, 300);
}

function toggleStream() {
    isStreaming = !isStreaming;
    const btn = document.getElementById('stream-toggle');
    if (!btn) return;

    if (isStreaming) {
        btn.classList.remove('paused');
        btn.innerHTML = `
            <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                <rect x="6" y="4" width="4" height="16"></rect>
                <rect x="14" y="4" width="4" height="16"></rect>
            </svg>
            <span>Pause</span>
        `;
    } else {
        btn.classList.add('paused');
        btn.innerHTML = `
            <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                <polygon points="5 3 19 12 5 21 5 3"></polygon>
            </svg>
            <span>Resume</span>
        `;
    }
}

function clearLogs() {
    if (confirm('Are you sure you want to clear all logs?')) {
        const stream = document.getElementById('log-stream');
        if (!stream) return;

        stream.innerHTML = `
            <div class="log-placeholder">
                <svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5">
                    <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"></path>
                    <polyline points="14 2 14 8 20 8"></polyline>
                    <line x1="16" y1="13" x2="8" y2="13"></line>
                    <line x1="16" y1="17" x2="8" y2="17"></line>
                    <polyline points="10 9 9 9 8 9"></polyline>
                </svg>
                <p>Logs cleared</p>
                <span class="placeholder-hint">New logs will appear here</span>
            </div>
        `;

        // Reset counts
        logCounts = { debug: 0, info: 0, warn: 0, error: 0, fatal: 0 };
        Object.keys(logCounts).forEach(level => {
            const el = document.getElementById(`${level}-count`);
            if (el) el.textContent = '0';
        });
        const totalEl = document.getElementById('total-count');
        if (totalEl) totalEl.textContent = '0';
    }
}

function downloadLogs() {
    const entries = document.querySelectorAll('.log-entry');
    let logs = [];

    entries.forEach(entry => {
        if (entry._logData) {
            logs.push(entry._logData);
        }
    });

    const blob = new Blob([JSON.stringify(logs, null, 2)], { type: 'application/json' });
    const url = URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = `logs-${new Date().toISOString().slice(0, 19).replace(/[T:]/g, '-')}.json`;
    document.body.appendChild(a);
    a.click();
    document.body.removeChild(a);
    URL.revokeObjectURL(url);
}

function scrollToTop() {
    const stream = document.getElementById('log-stream');
    if (stream) {
        stream.scrollTop = 0;
        autoScroll = false;
        updateLogScrollButtons();
    }
}

function scrollToBottom() {
    const stream = document.getElementById('log-stream');
    if (stream) {
        stream.scrollTop = stream.scrollHeight;
        autoScroll = true;
        updateLogScrollButtons();
    }
}

function updateLogScrollButtons() {
    const topBtn = document.getElementById('scroll-top-btn');
    const bottomBtn = document.getElementById('scroll-bottom-btn');
    if (topBtn) topBtn.classList.toggle('active', !autoScroll);
    if (bottomBtn) bottomBtn.classList.toggle('active', autoScroll);
}

function expandLog(btn) {
    const entry = btn.closest('.log-entry');
    const logData = entry._logData || {
        timestamp: entry.querySelector('.log-timestamp').textContent,
        level: entry.dataset.level,
        service: entry.dataset.service,
        message: entry.querySelector('.log-message').textContent
    };

    const panel = document.getElementById('log-detail-panel');
    const content = document.getElementById('log-detail-content');
    if (!panel || !content) return;

    content.innerHTML = `
        <div class="detail-section">
            <div class="detail-label">Timestamp</div>
            <div class="detail-value">${logData.timestamp || '--'}</div>
        </div>
        <div class="detail-section">
            <div class="detail-label">Level</div>
            <div class="detail-value">${(logData.level || 'info').toUpperCase()}</div>
        </div>
        <div class="detail-section">
            <div class="detail-label">Service</div>
            <div class="detail-value">${logData.service || 'unknown'}</div>
        </div>
        <div class="detail-section">
            <div class="detail-label">Message</div>
            <div class="detail-value">${escapeLogHtml(logData.message || '')}</div>
        </div>
        ${logData.stack ? `
        <div class="detail-section">
            <div class="detail-label">Stack Trace</div>
            <div class="detail-value">${escapeLogHtml(logData.stack)}</div>
        </div>
        ` : ''}
        ${logData.context ? `
        <div class="detail-section">
            <div class="detail-label">Context</div>
            <div class="detail-value">${escapeLogHtml(JSON.stringify(logData.context, null, 2))}</div>
        </div>
        ` : ''}
    `;

    panel.classList.add('open');
}

function closeLogDetail() {
    const panel = document.getElementById('log-detail-panel');
    if (panel) panel.classList.remove('open');
}

// Initialize on page load
document.addEventListener('DOMContentLoaded', function() {
    // Initialize WebSocket connection if on logs page
    if (document.getElementById('log-stream')) {
        initLogsWebSocket();
    }
});