// LOGPile Frontend Application

document.addEventListener('DOMContentLoaded', () => {
    initUpload();
    initTabs();
    initFilters();
});

// Upload handling
function initUpload() {
    const dropZone = document.getElementById('drop-zone');
    const fileInput = document.getElementById('file-input');

    dropZone.addEventListener('dragover', (e) => {
        e.preventDefault();
        dropZone.classList.add('dragover');
    });

    dropZone.addEventListener('dragleave', () => {
        dropZone.classList.remove('dragover');
    });

    dropZone.addEventListener('drop', (e) => {
        e.preventDefault();
        dropZone.classList.remove('dragover');
        const files = e.dataTransfer.files;
        if (files.length > 0) {
            uploadFile(files[0]);
        }
    });

    fileInput.addEventListener('change', () => {
        if (fileInput.files.length > 0) {
            uploadFile(fileInput.files[0]);
        }
    });
}

async function uploadFile(file) {
    const status = document.getElementById('upload-status');
    status.textContent = 'Загрузка и анализ...';
    status.className = '';

    const formData = new FormData();
    formData.append('archive', file);

    try {
        const response = await fetch('/api/upload', {
            method: 'POST',
            body: formData
        });

        const result = await response.json();

        if (response.ok) {
            status.innerHTML = `<strong>${escapeHtml(result.vendor)}</strong><br>` +
                `${result.stats.sensors} сенсоров, ${result.stats.fru} компонентов, ${result.stats.events} событий`;
            status.className = 'success';
            loadData(result.vendor);
        } else {
            status.textContent = result.error || 'Ошибка загрузки';
            status.className = 'error';
        }
    } catch (err) {
        status.textContent = 'Ошибка соединения';
        status.className = 'error';
    }
}

// Tab navigation
function initTabs() {
    const tabs = document.querySelectorAll('.tab');
    tabs.forEach(tab => {
        tab.addEventListener('click', () => {
            tabs.forEach(t => t.classList.remove('active'));
            document.querySelectorAll('.tab-content').forEach(c => c.classList.remove('active'));
            tab.classList.add('active');
            document.getElementById(tab.dataset.tab).classList.add('active');
        });
    });
}

// Filters
function initFilters() {
    document.getElementById('sensor-filter').addEventListener('change', (e) => {
        filterSensors(e.target.value);
    });
    document.getElementById('severity-filter').addEventListener('change', (e) => {
        filterEvents(e.target.value);
    });
    document.getElementById('serial-filter').addEventListener('change', (e) => {
        filterSerials(e.target.value);
    });
}

let allSensors = [];
let allEvents = [];
let allSerials = [];

let currentVendor = '';

// Load data from API
async function loadData(vendor) {
    currentVendor = vendor || '';
    document.getElementById('upload-section').classList.add('hidden');
    document.getElementById('data-section').classList.remove('hidden');
    document.getElementById('clear-btn').classList.remove('hidden');

    // Update vendor badge if exists
    const vendorBadge = document.getElementById('vendor-badge');
    if (vendorBadge && currentVendor) {
        vendorBadge.textContent = currentVendor;
        vendorBadge.classList.remove('hidden');
    }

    await Promise.all([
        loadConfig(),
        loadFirmware(),
        loadSensors(),
        loadSerials(),
        loadEvents()
    ]);
}

async function loadConfig() {
    try {
        const response = await fetch('/api/config');
        const config = await response.json();
        renderConfig(config);
    } catch (err) {
        console.error('Failed to load config:', err);
    }
}

function renderConfig(data) {
    const container = document.getElementById('config-content');

    if (!data || Object.keys(data).length === 0) {
        container.innerHTML = '<p class="no-data">Нет данных о конфигурации</p>';
        return;
    }

    // Handle both old format (direct hardware) and new format (with specification)
    const config = data.hardware || data;
    const spec = data.specification;

    let html = '';

    // Specification summary (new section)
    if (spec && spec.length > 0) {
        html += '<div class="config-section spec-section"><h3>Спецификация сервера</h3><ul class="spec-list">';
        spec.forEach(item => {
            html += `<li><span class="spec-category">${escapeHtml(item.category)}</span> ${escapeHtml(item.name)} <span class="spec-qty">- ${item.quantity} шт.</span></li>`;
        });
        html += '</ul></div>';
    }

    // CPUs
    if (config.cpus && config.cpus.length > 0) {
        html += '<div class="config-section"><h3>Процессоры</h3>';
        config.cpus.forEach(cpu => {
            html += `<div class="card">
                <strong>Socket ${cpu.socket}: ${escapeHtml(cpu.model)}</strong><br>
                Ядра: ${cpu.cores}, Потоки: ${cpu.threads}<br>
                Частота: ${cpu.frequency_mhz} MHz (Turbo: ${cpu.max_frequency_mhz} MHz)<br>
                TDP: ${cpu.tdp_w}W, L3: ${Math.round(cpu.l3_cache_kb/1024)} MB
            </div>`;
        });
        html += '</div>';
    }

    // Memory summary
    if (config.memory && config.memory.length > 0) {
        const totalGB = config.memory.reduce((sum, m) => sum + m.size_mb, 0) / 1024;
        html += `<div class="config-section"><h3>Память</h3>
            <p>Всего: ${totalGB} GB (${config.memory.length} модулей ${config.memory[0].type} @ ${config.memory[0].speed_mhz} MHz)</p>
            <p>Производитель: ${escapeHtml(config.memory[0].manufacturer)}</p>
        </div>`;
    }

    // Storage summary
    if (config.storage && config.storage.length > 0) {
        html += '<div class="config-section"><h3>Накопители</h3><table><thead><tr><th>Слот</th><th>Модель</th><th>Размер</th></tr></thead><tbody>';
        config.storage.forEach(s => {
            html += `<tr>
                <td>${escapeHtml(s.slot || s.interface)}</td>
                <td>${escapeHtml(s.model)}</td>
                <td>${s.size_gb} GB</td>
            </tr>`;
        });
        html += '</tbody></table></div>';
    }

    // PCIe summary
    if (config.pcie_devices && config.pcie_devices.length > 0) {
        html += '<div class="config-section"><h3>PCIe устройства</h3><table><thead><tr><th>Слот</th><th>Тип</th><th>Производитель</th><th>Скорость</th></tr></thead><tbody>';
        config.pcie_devices.forEach(p => {
            html += `<tr>
                <td>${escapeHtml(p.slot)}</td>
                <td>${escapeHtml(p.device_class)}</td>
                <td>${escapeHtml(p.manufacturer || '-')}</td>
                <td>x${p.link_width} ${escapeHtml(p.link_speed)}</td>
            </tr>`;
        });
        html += '</tbody></table></div>';
    }

    container.innerHTML = html;
}

async function loadFirmware() {
    try {
        const response = await fetch('/api/firmware');
        const firmware = await response.json();
        renderFirmware(firmware);
    } catch (err) {
        console.error('Failed to load firmware:', err);
    }
}

function renderFirmware(firmware) {
    const tbody = document.querySelector('#firmware-table tbody');
    tbody.innerHTML = '';

    if (!firmware || firmware.length === 0) {
        tbody.innerHTML = '<tr><td colspan="3" class="no-data">Нет данных о прошивках</td></tr>';
        return;
    }

    firmware.forEach(fw => {
        const row = document.createElement('tr');
        row.innerHTML = `
            <td>${escapeHtml(fw.device_name)}</td>
            <td><code>${escapeHtml(fw.version)}</code></td>
            <td>${escapeHtml(fw.build_date || '-')}</td>
        `;
        tbody.appendChild(row);
    });
}

async function loadSensors() {
    try {
        const response = await fetch('/api/sensors');
        allSensors = await response.json();
        renderSensors(allSensors);
    } catch (err) {
        console.error('Failed to load sensors:', err);
    }
}

function renderSensors(sensors) {
    const container = document.getElementById('sensors-content');

    if (!sensors || sensors.length === 0) {
        container.innerHTML = '<p class="no-data">Нет данных о сенсорах</p>';
        return;
    }

    // Group by type
    const byType = {};
    sensors.forEach(s => {
        if (!byType[s.type]) byType[s.type] = [];
        byType[s.type].push(s);
    });

    const typeNames = {
        temperature: 'Температура',
        voltage: 'Напряжение',
        power: 'Мощность',
        fan_speed: 'Вентиляторы',
        fan_status: 'Статус вентиляторов',
        psu_status: 'Статус БП',
        cpu_status: 'Статус CPU',
        storage_status: 'Статус накопителей',
        other: 'Прочее'
    };

    let html = '';
    for (const [type, items] of Object.entries(byType)) {
        html += `<div class="sensor-group" data-type="${type}">
            <h3>${typeNames[type] || type}</h3>
            <div class="sensor-grid">`;

        items.forEach(s => {
            let valueStr = '';
            let statusClass = s.status === 'ok' ? 'ok' : (s.status === 'ns' ? 'ns' : 'warn');

            if (s.value) {
                valueStr = `${s.value} ${s.unit}`;
            } else if (s.raw_value) {
                valueStr = s.raw_value;
            } else {
                valueStr = s.status;
            }

            html += `<div class="sensor-card ${statusClass}">
                <span class="sensor-name">${escapeHtml(s.name)}</span>
                <span class="sensor-value">${escapeHtml(valueStr)}</span>
            </div>`;
        });

        html += '</div></div>';
    }

    container.innerHTML = html;
}

function filterSensors(type) {
    if (!type) {
        renderSensors(allSensors);
        return;
    }
    const filtered = allSensors.filter(s => s.type === type);
    renderSensors(filtered);
}

async function loadSerials() {
    try {
        const response = await fetch('/api/serials');
        allSerials = await response.json();
        renderSerials(allSerials);
    } catch (err) {
        console.error('Failed to load serials:', err);
    }
}

function renderSerials(serials) {
    const tbody = document.querySelector('#serials-table tbody');
    tbody.innerHTML = '';

    if (!serials || serials.length === 0) {
        tbody.innerHTML = '<tr><td colspan="5" class="no-data">Нет серийных номеров</td></tr>';
        return;
    }

    const categoryNames = {
        'Board': 'Мат. плата',
        'CPU': 'Процессор',
        'Memory': 'Память',
        'Storage': 'Накопитель',
        'PCIe': 'PCIe',
        'Network': 'Сеть',
        'PSU': 'БП',
        'FRU': 'FRU'
    };

    serials.forEach(item => {
        if (!item.serial_number) return;
        const row = document.createElement('tr');
        row.innerHTML = `
            <td><span class="category-badge ${item.category.toLowerCase()}">${categoryNames[item.category] || item.category}</span></td>
            <td>${escapeHtml(item.component)}</td>
            <td><code>${escapeHtml(item.serial_number)}</code></td>
            <td>${escapeHtml(item.manufacturer || '-')}</td>
            <td>${escapeHtml(item.part_number || '-')}</td>
        `;
        tbody.appendChild(row);
    });
}

function filterSerials(category) {
    if (!category) {
        renderSerials(allSerials);
        return;
    }
    const filtered = allSerials.filter(s => s.category === category);
    renderSerials(filtered);
}

async function loadEvents() {
    try {
        const response = await fetch('/api/events');
        allEvents = await response.json();
        renderEvents(allEvents);
    } catch (err) {
        console.error('Failed to load events:', err);
    }
}

function renderEvents(events) {
    const tbody = document.querySelector('#events-table tbody');
    tbody.innerHTML = '';

    if (!events || events.length === 0) {
        tbody.innerHTML = '<tr><td colspan="4" class="no-data">Нет событий</td></tr>';
        return;
    }

    events.forEach(event => {
        const row = document.createElement('tr');
        row.innerHTML = `
            <td>${formatDate(event.timestamp)}</td>
            <td>${escapeHtml(event.source)}</td>
            <td>${escapeHtml(event.description)}</td>
            <td><span class="severity ${event.severity}">${event.severity}</span></td>
        `;
        tbody.appendChild(row);
    });
}

function filterEvents(severity) {
    if (!severity) {
        renderEvents(allEvents);
        return;
    }
    const filtered = allEvents.filter(e => e.severity === severity);
    renderEvents(filtered);
}

// Export functions
function exportData(format) {
    window.location.href = `/api/export/${format}`;
}

// Clear data
async function clearData() {
    try {
        await fetch('/api/clear', { method: 'DELETE' });
        document.getElementById('upload-section').classList.remove('hidden');
        document.getElementById('data-section').classList.add('hidden');
        document.getElementById('clear-btn').classList.add('hidden');
        document.getElementById('upload-status').textContent = '';
        allSensors = [];
        allEvents = [];
        allSerials = [];
    } catch (err) {
        console.error('Failed to clear data:', err);
    }
}

// Utilities
function formatDate(isoString) {
    if (!isoString) return '-';
    const date = new Date(isoString);
    return date.toLocaleString('ru-RU');
}

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