import db from '../lib/db';
import * as satellite from 'satellite.js';

const MY_LAT = 55.6683; 
const MY_LON = 12.5333;
const MY_ALT = 0;

async function updateISSData() {
  console.log("🛰️ Fetching TLE data...");
  
  const response = await fetch('https://celestrak.org/NORAD/elements/gp.php?CATNR=25544&FORMAT=tle');
  const data = await response.text();
  const lines = data.split('\n').filter(line => line.trim().length > 0);
  
  const line1 = lines[1];
  const line2 = lines[2];
  const satrec = satellite.twoline2satrec(line1, line2);
  
  const observerGd = {
    longitude: satellite.degreesToRadians(MY_LON),
    latitude: satellite.degreesToRadians(MY_LAT),
    height: MY_ALT
  };

  const passesFound: { start: Date, end: Date }[] = [];
  const now = new Date();
  const searchTime = new Date(now.getTime());

  const maxSearchMinutes = 2880; 
  let minutesSearched = 0;

  while (passesFound.length < 2 && minutesSearched < maxSearchMinutes) {
    const checkTime = new Date(searchTime.getTime() + (minutesSearched * 60000));
    const positionAndVelocity = satellite.propagate(satrec, checkTime);
    const gmst = satellite.gstime(checkTime);
    
    if (typeof positionAndVelocity?.position !== 'boolean') {
      const positionEcf = satellite.eciToEcf(positionAndVelocity!.position, gmst);
      const lookAngles = satellite.ecfToLookAngles(observerGd, positionEcf);
      const elevation = satellite.radiansToDegrees(lookAngles.elevation);

      if (elevation > 0) {
        const aos = checkTime;
        let los = new Date(aos.getTime() + 5 * 60000);

        for (let j = 1; j < 20; j++) {
          const exitTime = new Date(aos.getTime() + j * 60000);
          const pos = satellite.propagate(satrec, exitTime);
          const gmstExit = satellite.gstime(exitTime);
          if (typeof pos?.position !== 'boolean') {
            const lookExit = satellite.ecfToLookAngles(observerGd, satellite.eciToEcf(pos!.position, gmstExit));
            if (satellite.radiansToDegrees(lookExit.elevation) < 0) {
              los = exitTime;
              break;
            }
          }
        }
        
        passesFound.push({ start: aos, end: los });
        
        minutesSearched += 90; 
        continue;
      }
    }
    minutesSearched++;
  }

  db.prepare('DELETE FROM iss_passes').run();
  const insert = db.prepare('INSERT INTO iss_passes (pass_time, end_time) VALUES (?, ?)');
  
  for (const pass of passesFound) {
    insert.run(pass.start.toISOString(), pass.end.toISOString());
  }

  console.log(`✅ Stored ${passesFound.length} future passes with start and end times.`);
}

// Add this to your worker script
function getNextMoonPhase() {
  const LUNAR_CYCLE = 29.53059; // Days
  const KNOWN_NEW_MOON = new Date('2024-01-11T11:57:00Z'); // A reference New Moon
  
  const now = new Date();
  const msSinceReference = now.getTime() - KNOWN_NEW_MOON.getTime();
  const daysSinceReference = msSinceReference / (1000 * 60 * 60 * 24);
  
  const currentCycleProgress = daysSinceReference % LUNAR_CYCLE;
  const daysToFullMoon = (LUNAR_CYCLE / 2) - currentCycleProgress;
  const daysToNewMoon = LUNAR_CYCLE - currentCycleProgress;

  // If we've passed the Full Moon in this cycle, count to New Moon
  let targetDate, title;
  if (daysToFullMoon > 0) {
    targetDate = new Date(now.getTime() + daysToFullMoon * 86400000);
    title = "Next Full Moon";
  } else {
    targetDate = new Date(now.getTime() + daysToNewMoon * 86400000);
    title = "Next New Moon";
  }

  return { title, targetDate };
}

async function updateAllData() {
  await updateISSData(); 

  const moon = getNextMoonPhase();
  const upsertMoon = db.prepare(`
    INSERT INTO global_events (id, title, event_time) 
    VALUES ('moon_phase', ?, ?)
    ON CONFLICT(id) DO UPDATE SET title=excluded.title, event_time=excluded.event_time
  `);
  upsertMoon.run(moon.title, moon.targetDate.toISOString());
  
  console.log(`🌙 Updated Moon Phase: ${moon.title}`);
}

updateAllData().catch(console.error);