<!DOCTYPE html>
<html lang="lv">
<head>
  <meta charset="Windows-1257">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Jūrtakas webkamera Kolkasragā</title>
  <style>
    #imageContainer {
      position: relative;
      max-width: 1200px;
      margin: 20px auto;
    }
    #webcamImage {
      width: 100%;
      height: auto;
      display: block;
    }
    #notificationOverlay {
      position: absolute;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      background: rgba(0, 0, 0, 0.6);
      color: white;
      padding: 12px 24px;
      font-size: 20px;
      border-radius: 6px;
      display: none;
      z-index: 2;
      text-align: center;
      white-space: nowrap;
      pointer-events: none;
    }
    .button {
      padding: 10px 15px;
      margin: 5px;
      font-size: 18px;
    }
  </style>
</head>
<body>

<div id="imageContainer">
  <div id="notificationOverlay"></div>
  <img id="webcamImage" src="" alt="" />
</div>

<div style="text-align:center;">
  <button class="button" onclick="loadImage('previous')">←</button>
  <button class="button" onclick="loadLatestImage()">Tagad</button>
  <button class="button" onclick="loadImage('next')">→</button>
</div>

<script>
  const baseUrl = 'https://baltictrails.eu/webcam/snap/kolkasrags/IMAG';
  const baseImageNumber = 1825;
  const baseDate = new Date('2025-05-07');
  const imagesPerDay = 33;
  let currentImageNumber;
  const knownImages = {};

  function estimateCurrentImageNumber() {
    const now = new Date();
    const elapsedMs = now - baseDate;
    const elapsedDays = elapsedMs / (1000 * 60 * 60 * 24);
    const estimate = baseImageNumber + Math.floor(elapsedDays * imagesPerDay);
    console.log(`📅 Estimated current image: IMAG${estimate}`);
    return estimate;
  }

  function checkImageExists(imageNumber) {
    return new Promise((resolve) => {
      const img = new Image();
      img.onload = () => {
        knownImages[imageNumber] = true;
        console.log(`✅ Found: IMAG${imageNumber}`);
        resolve(true);
      };
      img.onerror = () => {
        knownImages[imageNumber] = false;
        console.log(`❌ Missing: IMAG${imageNumber}`);
        resolve(false);
      };
      img.src = `${baseUrl}${imageNumber}.jpg?cacheBust=${Date.now()}`;
    });
  }

  async function findLatestImage(maxTries = 50) {
    const estimate = estimateCurrentImageNumber();
    for (let i = 0; i < maxTries; i++) {
      const candidate = estimate - i;
      if (candidate >= baseImageNumber && await checkImageExists(candidate)) {
        return candidate;
      }
    }
    return baseImageNumber; // fallback
  }

  async function initializeViewer() {
    currentImageNumber = await findLatestImage();
    displayImage();
  }

  async function loadLatestImage() {
    const latest = await findLatestImage();
    if (latest > currentImageNumber) {
      currentImageNumber = latest;
      displayImage();
      showNotification('Ir jaunāki attēli!');
    } else if (latest === currentImageNumber) {
      showNotification('Jaunāku attēlu nav.');
    } else {
      currentImageNumber = latest;
      displayImage();
    }
    setTimeout(hideNotification, 3000);
  }

  async function loadImage(direction) {
    let candidate;

    if (direction === 'previous') {
      candidate = currentImageNumber - 1;
    } else if (direction === 'next') {
      candidate = currentImageNumber + 1;
    }

    if (candidate >= baseImageNumber && await checkImageExists(candidate)) {
      currentImageNumber = candidate;
      displayImage();
    }
  }

  function displayImage() {
    const img = document.getElementById('webcamImage');
    const imageUrl = `${baseUrl}${currentImageNumber}.jpg?cacheBust=${Date.now()}`;
    showNotification('Ielādē Jūrtakas kameras attēlus...');
    img.onload = () => hideNotification();
    img.onerror = () => showNotification('Neizdevās ielādēt attēlu.');
    img.src = imageUrl;
  }

  function showNotification(message) {
    const overlay = document.getElementById("notificationOverlay");
    overlay.textContent = message;
    overlay.style.display = "block";
  }

  function hideNotification() {
    const overlay = document.getElementById("notificationOverlay");
    overlay.style.display = "none";
  }

  window.onload = initializeViewer;
  setInterval(loadLatestImage, 5 * 60 * 1000);
</script>

</body>
</html>