/**
 * Landvex Dashboard
 * Interactive web dashboard for urban intelligence
 */

// API Configuration
const API_URL = 'https://api.landvex.com/v1';

// State
let currentView = 'overview';
let selectedLocation = null;
let observations = [];
let map = null;
let charts = {};

// Initialize dashboard
document.addEventListener('DOMContentLoaded', () => {
  initDashboard();
});

function initDashboard() {
  loadStats();
  loadObservations();
  initMap();
  initCharts();
  setupEventListeners();
  startRealtimeUpdates();
}

// Load statistics
async function loadStats() {
  try {
    const response = await fetch(`${API_URL}/stats`);
    const data = await response.json();
    
    updateStatCard('total-observations', data.total_observations, '+12%');
    updateStatCard('active-zoomers', data.active_zoomers, '+8%');
    updateStatCard('avg-rgi', data.avg_rgi.toFixed(1), '+0.3');
    updateStatCard('pending-actions', data.pending_actions, '-5');
  } catch (error) {
    console.log('Using mock data');
    updateStatCard('total-observations', 1247, '+12%');
    updateStatCard('active-zoomers', 89, '+8%');
    updateStatCard('avg-rgi', 4.2, '+0.3');
    updateStatCard('pending-actions', 23, '-5');
  }
}

function updateStatCard(id, value, change) {
  const card = document.getElementById(id);
  if (!card) return;
  
  const valueEl = card.querySelector('.stat-value');
  const changeEl = card.querySelector('.stat-change');
  
  if (valueEl) valueEl.textContent = value.toLocaleString();
  if (changeEl) {
    changeEl.textContent = change;
    changeEl.className = 'stat-change ' + (change.startsWith('+') ? 'positive' : 'negative');
  }
}

// Load observations
async function loadObservations() {
  try {
    const response = await fetch(`${API_URL}/observations?limit=10`);
    const data = await response.json();
    observations = data.observations || [];
    renderObservationsTable();
  } catch (error) {
    console.log('Using mock observations');
    observations = getMockObservations();
    renderObservationsTable();
  }
}

function getMockObservations() {
  return [
    { id: 'OBS-001247', lat: 59.3293, lng: 18.0686, type: 'Street Light', condition: 3, zoomer: 'Marcus K.', status: 'approved', date: '2026-06-26' },
    { id: 'OBS-001246', lat: 59.3301, lng: 18.0692, type: 'Sidewalk', condition: 4, zoomer: 'Sophie V.', status: 'pending', date: '2026-06-26' },
    { id: 'OBS-001245', lat: 59.3289, lng: 18.0678, type: 'Building', condition: 2, zoomer: 'Alicia L.', status: 'approved', date: '2026-06-25' },
    { id: 'OBS-001244', lat: 59.3312, lng: 18.0701, type: 'Road', condition: 5, zoomer: 'James R.', status: 'pending', date: '2026-06-25' },
    { id: 'OBS-001243', lat: 59.3278, lng: 18.0665, type: 'Bridge', condition: 3, zoomer: 'Emma T.', status: 'rejected', date: '2026-06-24' },
  ];
}

function renderObservationsTable() {
  const tbody = document.getElementById('observations-tbody');
  if (!tbody) return;
  
  tbody.innerHTML = observations.map(obs => `
    <tr data-id="${obs.id}">
      <td>${obs.id}</td>
      <td>${obs.lat.toFixed(4)}, ${obs.lng.toFixed(4)}</td>
      <td>${obs.type}</td>
      <td><span class="condition-indicator condition-${obs.condition}"></span>${obs.condition}/5</td>
      <td>${obs.zoomer}</td>
      <td><span class="status-badge status-${obs.status}">${obs.status}</span></td>
      <td>${obs.date}</td>
    </tr>
  `).join('');
  
  // Add click handlers
  tbody.querySelectorAll('tr').forEach(row => {
    row.addEventListener('click', () => {
      const id = row.dataset.id;
      showObservationDetail(id);
    });
  });
}

// Initialize map (placeholder for real map integration)
function initMap() {
  const mapContainer = document.getElementById('map-container');
  if (!mapContainer) return;
  
  // Placeholder - integrate with Mapbox, Google Maps, or Leaflet
  mapContainer.innerHTML = `
    <div class="map-placeholder">
      <div class="map-icon">🗺️</div>
      <p>Interactive Map</p>
      <p>${observations.length} observations</p>
      <button class="btn btn-primary" onclick="loadRealMap()">Load Map</button>
    </div>
  `;
}

function loadRealMap() {
  // Integrate with actual map library
  console.log('Loading real map...');
}

// Initialize charts (placeholder for Chart.js or similar)
function initCharts() {
  const rgiChart = document.getElementById('rgi-chart');
  if (rgiChart) {
    renderRGIChart();
  }
}

function renderRGIChart() {
  const dimensions = [
    { name: 'Physical', value: 5.5, color: '#007AFF' },
    { name: 'Organizational', value: 3.8, color: '#34C759' },
    { name: 'Safety', value: 4.1, color: '#FF9500' },
    { name: 'Economic', value: 2.9, color: '#FF3B30' },
    { name: 'Maintenance', value: 4.7, color: '#5856D6' },
    { name: 'Environmental', value: 3.2, color: '#AF52DE' },
    { name: 'Informational', value: 3.5, color: '#5AC8FA' },
  ];
  
  const chartContainer = document.getElementById('rgi-chart');
  if (!chartContainer) return;
  
  chartContainer.innerHTML = dimensions.map(d => `
    <div class="rgi-bar-container">
      <div class="rgi-bar-label">${d.name}</div>
      <div class="rgi-bar-wrapper">
        <div class="rgi-bar" style="width: ${(d.value / 7 * 100).toFixed(0)}%; background-color: ${d.color};"></div>
      </div>
      <div class="rgi-bar-value">${d.value}</div>
    </div>
  `).join('');
}

// Setup event listeners
function setupEventListeners() {
  // Navigation
  document.querySelectorAll('.nav-link').forEach(link => {
    link.addEventListener('click', (e) => {
      e.preventDefault();
      const view = e.target.dataset.view;
      switchView(view);
    });
  });
  
  // Filter buttons
  document.querySelectorAll('.filter-btn').forEach(btn => {
    btn.addEventListener('click', (e) => {
      const filter = e.target.dataset.filter;
      applyFilter(filter);
    });
  });
  
  // Export button
  const exportBtn = document.getElementById('export-btn');
  if (exportBtn) {
    exportBtn.addEventListener('click', exportData);
  }
}

// Switch view
function switchView(view) {
  currentView = view;
  
  // Hide all views
  document.querySelectorAll('.view').forEach(v => v.classList.remove('active'));
  
  // Show selected view
  const selectedView = document.getElementById(`view-${view}`);
  if (selectedView) {
    selectedView.classList.add('active');
  }
  
  // Update nav
  document.querySelectorAll('.nav-link').forEach(link => {
    link.classList.toggle('active', link.dataset.view === view);
  });
}

// Apply filter
function applyFilter(filter) {
  console.log('Applying filter:', filter);
  // Filter observations and update table
}

// Show observation detail
function showObservationDetail(id) {
  const obs = observations.find(o => o.id === id);
  if (!obs) return;
  
  // Show modal or navigate to detail view
  console.log('Observation detail:', obs);
}

// Export data
function exportData() {
  const data = {
    observations,
    exported_at: new Date().toISOString(),
  };
  
  const blob = new Blob([JSON.stringify(data, null, 2)], { type: 'application/json' });
  const url = URL.createObjectURL(blob);
  
  const a = document.createElement('a');
  a.href = url;
  a.download = `landvex-export-${new Date().toISOString().split('T')[0]}.json`;
  a.click();
  
  URL.revokeObjectURL(url);
}

// Real-time updates
function startRealtimeUpdates() {
  // Poll for new observations every 30 seconds
  setInterval(() => {
    loadObservations();
  }, 30000);
  
  // Update stats every minute
  setInterval(() => {
    loadStats();
  }, 60000);
}

// Search functionality
function searchObservations(query) {
  const filtered = observations.filter(obs => 
    obs.id.toLowerCase().includes(query.toLowerCase()) ||
    obs.type.toLowerCase().includes(query.toLowerCase()) ||
    obs.zoomer.toLowerCase().includes(query.toLowerCase())
  );
  
  renderFilteredObservations(filtered);
}

function renderFilteredObservations(filtered) {
  const tbody = document.getElementById('observations-tbody');
  if (!tbody) return;
  
  tbody.innerHTML = filtered.map(obs => `
    <tr data-id="${obs.id}">
      <td>${obs.id}</td>
      <td>${obs.lat.toFixed(4)}, ${obs.lng.toFixed(4)}</td>
      <td>${obs.type}</td>
      <td><span class="condition-indicator condition-${obs.condition}"></span>${obs.condition}/5</td>
      <td>${obs.zoomer}</td>
      <td><span class="status-badge status-${obs.status}">${obs.status}</span></td>
      <td>${obs.date}</td>
    </tr>
  `).join('');
}

// RGI calculation
function calculateRGI(observations) {
  if (!observations.length) return 0;
  
  const conditions = observations.map(o => o.condition);
  const avgCondition = conditions.reduce((a, b) => a + b, 0) / conditions.length;
  
  // RGI = 7 - average condition (inverted)
  return Math.max(0, 7 - avgCondition).toFixed(1);
}

// Export for global access
window.LandvexDashboard = {
  switchView,
  applyFilter,
  exportData,
  searchObservations,
  calculateRGI,
};