const express = require('express');
const fs = require('fs');
const path = require('path');

const app = express();
const PORT = 9202;
const ALERTS_FILE = path.join(__dirname, 'alerts.json');

app.use(express.json());

// Load/save alerts
function loadAlerts() {
  try { return JSON.parse(fs.readFileSync(ALERTS_FILE, 'utf8')); }
  catch { return []; }
}
function saveAlerts(alerts) {
  fs.writeFileSync(ALERTS_FILE, JSON.stringify(alerts, null, 2));
}

const http = require('http');

// Camera proxy config
const HA_URL = 'http://192.168.1.252:8123';
const HA_TOKEN = process.env.HA_TOKEN || '';

// SSE clients
const sseClients = new Set();

// Serve dashboard
app.get('/', (req, res) => {
  res.set('Cache-Control', 'no-store');
  res.sendFile(path.join(__dirname, 'index.html'));
});

// List alerts
app.get('/api/alerts', (req, res) => {
  res.json(loadAlerts().slice(-50).reverse());
});

// Push alert
app.post('/api/alerts', (req, res) => {
  const { message, priority = 'info', group } = req.body;
  if (!message) return res.status(400).json({ error: 'message required' });
  const alert = {
    id: Date.now().toString(36) + Math.random().toString(36).slice(2, 6),
    message,
    priority,
    group: group || null,
    timestamp: new Date().toISOString()
  };
  const alerts = loadAlerts();
  alerts.push(alert);
  // Keep last 100
  if (alerts.length > 100) alerts.splice(0, alerts.length - 100);
  saveAlerts(alerts);
  // Notify SSE clients
  for (const client of sseClients) {
    client.write(`data: ${JSON.stringify(alert)}\n\n`);
  }
  res.status(201).json(alert);
});

// Bedroom 1 sensors proxy from HA
const SENSOR_ENTITIES = {
  temperature: 'sensor.athom_tem_hum_sensor_b3882c_temperature',
  humidity: 'sensor.athom_tem_hum_sensor_b3882c_humidity',
  co2: 'sensor.athom_co2_sensor_b34780_co2'
};

let sensorCache = { data: null, ts: 0 };

app.get('/api/sensors/bed1', async (req, res) => {
  // Cache for 15s to avoid hammering HA
  if (sensorCache.data && Date.now() - sensorCache.ts < 4000) {
    return res.json(sensorCache.data);
  }
  try {
    const results = {};
    for (const [key, entity] of Object.entries(SENSOR_ENTITIES)) {
      const data = await new Promise((resolve, reject) => {
        const r = http.get(`${HA_URL}/api/states/${entity}`, {
          headers: { 'Authorization': `Bearer ${HA_TOKEN}` }
        }, (haRes) => {
          let body = '';
          haRes.on('data', c => body += c);
          haRes.on('end', () => { try { resolve(JSON.parse(body)); } catch(e) { reject(e); } });
        });
        r.on('error', reject);
        r.setTimeout(3000, () => { r.destroy(); reject(new Error('timeout')); });
      });
      results[key] = data.state;
    }
    sensorCache = { data: results, ts: Date.now() };
    res.json(results);
  } catch(e) {
    res.status(502).json({ error: 'HA unavailable' });
  }
});

// Weather: temp range + severe alerts
let weatherCache = { data: null, ts: 0 };
const SEVERE_EVENTS = ['hurricane', 'tropical storm', 'tornado', 'severe thunderstorm', 'flash flood', 'storm surge', 'tsunami', 'extreme wind'];

app.get('/api/weather', async (req, res) => {
  // Refresh current temp from NWS every request, forecast/NHC daily
  const forecastFresh = weatherCache.data && Date.now() - weatherCache.ts < 86400000;
  if (forecastFresh) {
    // Just update current temp from NWS
    try {
      const nwsData = await new Promise((resolve, reject) => {
        const r = require('https').get('https://api.weather.gov/stations/KSPG/observations/latest', {
          headers: { 'User-Agent': 'james-dashboard' }
        }, (resp) => {
          let body = '';
          resp.on('data', c => body += c);
          resp.on('end', () => { try { resolve(JSON.parse(body)); } catch(e) { reject(e); } });
        });
        r.on('error', reject);
        r.setTimeout(5000, () => { r.destroy(); reject(new Error('timeout')); });
      });
      // Convert Celsius to Fahrenheit
      const tempC = nwsData.properties.temperature.value;
      if (tempC !== null) {
        weatherCache.data.current = Math.round(tempC * 9/5 + 32);
        weatherCache.data.currentC = Math.round(tempC);
      }
    } catch(e) {}
    return res.json(weatherCache.data);
  }
  try {
    const result = { high: null, low: null, current: null, currentC: null, alerts: [] };

    // Current outside temp from NWS
    try {
      const nwsData = await new Promise((resolve, reject) => {
        const r = require('https').get('https://api.weather.gov/stations/KSPG/observations/latest', {
          headers: { 'User-Agent': 'james-dashboard' }
        }, (resp) => {
          let body = '';
          resp.on('data', c => body += c);
          resp.on('end', () => { try { resolve(JSON.parse(body)); } catch(e) { reject(e); } });
        });
        r.on('error', reject);
        r.setTimeout(5000, () => { r.destroy(); reject(new Error('timeout')); });
      });
      // Convert Celsius to Fahrenheit
      const tempC = nwsData.properties.temperature.value;
      if (tempC !== null) {
        result.current = Math.round(tempC * 9/5 + 32);
        result.currentC = Math.round(tempC);
      }
    } catch(e) {}

    // Temp range from wttr.in
    const wttr = await new Promise((resolve, reject) => {
      const r = require('https').get('https://wttr.in/St+Petersburg+FL?format=j1', {
        headers: { 'User-Agent': 'james-dashboard' }
      }, (resp) => {
        let body = '';
        resp.on('data', c => body += c);
        resp.on('end', () => { try { resolve(JSON.parse(body)); } catch(e) { reject(e); } });
      });
      r.on('error', reject);
      r.setTimeout(10000, () => { r.destroy(); reject(new Error('timeout')); });
    });
    const today = wttr.weather[0];
    result.high = parseInt(today.maxtempF);
    result.low = parseInt(today.mintempF);

    // NWS severe alerts (imminent)
    try {
      const nws = await new Promise((resolve, reject) => {
        const r = require('https').get('https://api.weather.gov/alerts/active?point=27.7676,-82.6403', {
          headers: { 'User-Agent': 'james-dashboard' }
        }, (resp) => {
          let body = '';
          resp.on('data', c => body += c);
          resp.on('end', () => { try { resolve(JSON.parse(body)); } catch(e) { reject(e); } });
        });
        r.on('error', reject);
        r.setTimeout(10000, () => { r.destroy(); reject(new Error('timeout')); });
      });
      for (const f of (nws.features || [])) {
        const event = (f.properties.event || '').toLowerCase();
        if (SEVERE_EVENTS.some(s => event.includes(s))) {
          result.alerts.push(f.properties.event);
        }
      }
    } catch(e) {}

    // NHC Tropical Weather Outlook (7-day formation, hurricane season)
    try {
      const twoHtml = await new Promise((resolve, reject) => {
        const r = require('https').get('https://www.nhc.noaa.gov/text/MIATWOAT.shtml', {
          headers: { 'User-Agent': 'james-dashboard' }
        }, (resp) => {
          let body = '';
          resp.on('data', c => body += c);
          resp.on('end', () => resolve(body));
        });
        r.on('error', reject);
        r.setTimeout(10000, () => { r.destroy(); reject(new Error('timeout')); });
      });
      const preMatch = twoHtml.match(/<pre>([\s\S]*?)<\/pre>/);
      if (preMatch) {
        const text = preMatch[1].replace(/<[^>]+>/g, '');
        // Skip if off-season / "not expected"
        if (!text.includes('formation is not expected')) {
          // Extract formation probabilities
          const lines = text.split('\n');
          const formations = [];
          for (let i = 0; i < lines.length; i++) {
            const pctMatch = lines[i].match(/(\d+)\s*percent/i);
            if (pctMatch && parseInt(pctMatch[1]) >= 20) {
              // Find nearby context about Gulf/Caribbean
              const context = lines.slice(Math.max(0, i-3), i+2).join(' ');
              const loc = context.match(/Gulf|Caribbean|Atlantic|Florida|Bahamas/i);
              formations.push({
                pct: parseInt(pctMatch[1]),
                location: loc ? loc[0] : 'Atlantic',
                text: lines[i].trim()
              });
            }
          }
          if (formations.length) {
            const worst = formations.sort((a,b) => b.pct - a.pct)[0];
            result.tropical = `${worst.pct}% tropical development (${worst.location}, 7-day)`;
          }
        }
      }
    } catch(e) {}

    weatherCache = { data: result, ts: Date.now() };
    res.json(result);
  } catch(e) {
    console.error('Weather fetch failed:', e.message);
    res.status(502).json({ error: 'weather unavailable' });
  }
});

// Camera proxy - snapshot from HA
app.get('/api/cam/pulse-ox', (req, res) => {
  const haReq = http.get(`${HA_URL}/api/camera_proxy/camera.pulse_ox_live_view`, {
    headers: { 'Authorization': `Bearer ${HA_TOKEN}` }
  }, (haRes) => {
    res.set('Content-Type', haRes.headers['content-type'] || 'image/jpeg');
    res.set('Cache-Control', 'no-store');
    haRes.pipe(res);
  });
  haReq.on('error', () => res.status(502).end());
  haReq.setTimeout(5000, () => { haReq.destroy(); res.status(504).end(); });
});

// Camera proxy - MJPEG stream from HA
app.get('/api/cam/pulse-ox/stream', (req, res) => {
  const haReq = http.get(`${HA_URL}/api/camera_proxy_stream/camera.pulse_ox_live_view`, {
    headers: { 'Authorization': `Bearer ${HA_TOKEN}` }
  }, (haRes) => {
    res.set('Content-Type', haRes.headers['content-type'] || 'multipart/x-mixed-replace; boundary=frame');
    res.set('Cache-Control', 'no-store');
    haRes.pipe(res);
    req.on('close', () => haRes.destroy());
  });
  haReq.on('error', () => res.status(502).end());
});

// Toggle done
app.patch('/api/alerts/:id/done', (req, res) => {
  const alerts = loadAlerts();
  const alert = alerts.find(a => a.id === req.params.id);
  if (!alert) return res.status(404).json({ error: 'not found' });
  alert.done = !!req.body.done;
  saveAlerts(alerts);
  res.json(alert);
});

// Delete alert
app.delete('/api/alerts/:id', (req, res) => {
  const alerts = loadAlerts();
  const idx = alerts.findIndex(a => a.id === req.params.id);
  if (idx === -1) return res.status(404).json({ error: 'not found' });
  alerts.splice(idx, 1);
  saveAlerts(alerts);
  // Notify SSE clients of removal
  for (const client of sseClients) {
    client.write(`data: ${JSON.stringify({ type: 'remove', id: req.params.id })}\n\n`);
  }
  res.json({ status: 'deleted' });
});

// SSE stream
app.get('/api/alerts/stream', (req, res) => {
  res.writeHead(200, {
    'Content-Type': 'text/event-stream',
    'Cache-Control': 'no-cache',
    'Connection': 'keep-alive',
  });
  res.write('data: {"type":"connected"}\n\n');
  sseClients.add(res);
  req.on('close', () => sseClients.delete(res));
});

// Auto-purge done items older than 2 hours
setInterval(() => {
  const alerts = loadAlerts();
  const cutoff = Date.now() - 2 * 3600000;
  const filtered = alerts.filter(a => !(a.done && new Date(a.timestamp).getTime() < cutoff));
  if (filtered.length < alerts.length) {
    saveAlerts(filtered);
    for (const client of sseClients) {
      client.write(`data: ${JSON.stringify({ type: 'refresh' })}\n\n`);
    }
  }
}, 300000); // Check every 5 min

// Meeting storage
let nextMeeting = null;

// Claude usage endpoint
app.get('/api/claude-usage', async (req, res) => {
  try {
    const jamesData = await new Promise((resolve, reject) => {
      const r = http.get('http://localhost:9200/api/status', (resp) => {
        let body = '';
        resp.on('data', c => body += c);
        resp.on('end', () => { try { resolve(JSON.parse(body)); } catch(e) { reject(e); } });
      });
      r.on('error', reject);
      r.setTimeout(3000, () => { r.destroy(); reject(new Error('timeout')); });
    });
    
    // James dashboard returns {status: {key: {value: "..."}, ...}}
    const statuses = jamesData.status || jamesData;
    const usage = statuses['claude-usage'] || statuses['claude'];
    
    // Extract usage percentage from value like "📊 Weekly: 46% used" or "46% used · 2:00 PM"
    let usagePct = null;
    if (usage && usage.value) {
      const m = usage.value.match(/(\d+)%/);
      if (m) usagePct = parseInt(m[1]);
    }
    
    // Calculate time% into budget week (Sat 2pm - Sat 2pm ET)
    const now = new Date();
    // Find most recent Saturday 2pm ET
    const et = new Date(now.toLocaleString('en-US', { timeZone: 'America/New_York' }));
    const day = et.getDay(); // 0=Sun
    // Days since last Saturday
    const daysSinceSat = day === 6 ? 0 : day + 1;
    const lastSat = new Date(et);
    lastSat.setDate(lastSat.getDate() - daysSinceSat);
    lastSat.setHours(14, 0, 0, 0); // 2pm
    // If we're before 2pm on Saturday, go back one more week
    if (et < lastSat) {
      lastSat.setDate(lastSat.getDate() - 7);
    }
    const weekMs = 7 * 24 * 60 * 60 * 1000;
    const elapsed = et - lastSat;
    const timePct = Math.min(100, Math.max(0, (elapsed / weekMs) * 100));
    
    // Burn rate = usage% / time% — >100 means overspending
    let pace = null;
    if (timePct > 0) {
      pace = Math.round((usagePct / timePct) * 100);
    }
    
    res.json({ usage: usagePct, timePct: Math.round(timePct), pace });
  } catch(e) {
    res.status(502).json({ error: 'james dashboard unavailable' });
  }
});

// Meeting endpoints
app.get('/api/meeting', (req, res) => {
  if (!nextMeeting) return res.json(null);
  
  const now = new Date();
  const meetingTime = new Date(nextMeeting.time);
  
  // Remove if in the past
  if (meetingTime < now) {
    nextMeeting = null;
    return res.json(null);
  }
  
  res.json(nextMeeting);
});

app.post('/api/meeting', (req, res) => {
  const { title, time, id } = req.body;
  if (!title || !time) return res.status(400).json({ error: 'title and time required' });
  
  nextMeeting = { title, time, id: id || Date.now().toString(36) };
  res.status(201).json(nextMeeting);
});

app.listen(PORT, '0.0.0.0', () => {
  console.log(`Alert dashboard running on http://0.0.0.0:${PORT}`);
});