// Announcement overlay polling and rendering helpers.

(function () {
  if (window.__pulseThumbnailPreview) {
    return;
  }

  var announcementLayer = null;
  var announcementRefreshTimer = null;
  var announcementPollTimer = null;
  var announcementSocket = null;
  var announcementReconnectTimer = null;
  var announcementRequestId = 0;
  var announcementEtag = '';
  var announcementHideTimer = null;
  var announcementRevealTimer = null;
  var announcementFadeDurationMs = 220;
  var announcementSocketPath = '/ws/screens/' + encodeURIComponent(window.slug || '') + '/announcements';

  function normalizeAnnouncementType(value) {
    var normalized = String(value || '').trim().toLowerCase();
    if (normalized === 'center-card') {
      return 'fullscreen';
    }
    if (['lower-third', 'fullscreen', 'top-banner'].indexOf(normalized) !== -1) {
      return normalized;
    }
    return 'lower-third';
  }

  function getAnnouncementLayer() {
    if (announcementLayer) {
      return announcementLayer;
    }
    announcementLayer = document.getElementById('player-announcement-layer');
    if (!announcementLayer) {
      announcementLayer = document.createElement('div');
      announcementLayer.id = 'player-announcement-layer';
      announcementLayer.className = 'player-announcement-layer';
      announcementLayer.setAttribute('aria-live', 'polite');
      announcementLayer.setAttribute('aria-atomic', 'true');
      document.body.appendChild(announcementLayer);
    }
    return announcementLayer;
  }

  function clearAnnouncementHideTimer() {
    if (announcementHideTimer) {
      window.clearTimeout(announcementHideTimer);
      announcementHideTimer = null;
    }
  }

  function clearAnnouncementRevealTimer() {
    if (announcementRevealTimer) {
      window.cancelAnimationFrame(announcementRevealTimer);
      announcementRevealTimer = null;
    }
  }

  function activateInjectedScripts(layer) {
    if (!layer) {
      return;
    }

    var scripts = layer.querySelectorAll('script');
    scripts.forEach(function (originalScript) {
      var replacement = document.createElement('script');

      Array.prototype.slice.call(originalScript.attributes || []).forEach(function (attribute) {
        replacement.setAttribute(attribute.name, attribute.value);
      });

      replacement.text = originalScript.textContent || '';
      originalScript.parentNode.replaceChild(replacement, originalScript);
    });
  }

  function hideAnnouncement() {
    var layer = getAnnouncementLayer();
    clearAnnouncementRevealTimer();
    clearAnnouncementHideTimer();
    layer.classList.add('is-closing');
    layer.classList.remove('is-visible');
    announcementHideTimer = window.setTimeout(function () {
      layer.innerHTML = '';
      layer.hidden = true;
      layer.classList.remove('is-closing');
      announcementHideTimer = null;
    }, announcementFadeDurationMs);
  }

  function renderAnnouncement(announcement) {
    var layer = getAnnouncementLayer();
    if (!announcement || !announcement.message) {
      hideAnnouncement();
      return;
    }

    var type = normalizeAnnouncementType(announcement.announcement_type);

    clearAnnouncementRevealTimer();
    clearAnnouncementHideTimer();
    layer.hidden = false;
    layer.className = 'player-announcement-layer player-announcement-layer--' + type;
    layer.classList.remove('is-closing');
    layer.innerHTML = window.renderPlayerAnnouncementMarkup ? window.renderPlayerAnnouncementMarkup(announcement) : '';
    activateInjectedScripts(layer);
    announcementRevealTimer = window.requestAnimationFrame(function () {
      announcementRevealTimer = null;
      layer.classList.add('is-visible');
    });
  }

  function scheduleAnnouncementRefresh(delayMs) {
    if (announcementRefreshTimer) {
      window.clearTimeout(announcementRefreshTimer);
    }
    announcementRefreshTimer = window.setTimeout(function () {
      announcementRefreshTimer = null;
      void refreshAnnouncementOverlay();
    }, Math.max(0, Number(delayMs || 0)));
  }

  async function refreshAnnouncementOverlay() {
    var requestId = ++announcementRequestId;
    var request = new XMLHttpRequest();
    var url = window.location.origin + '/api/screens/' + encodeURIComponent(window.slug || '') + '/announcement?ts=' + Date.now();
    request.open('GET', url, true);
    request.timeout = 2500;
    if (window.__pulsePageAuthToken) {
      request.setRequestHeader('x-pulse-page-auth', window.__pulsePageAuthToken);
    }
    if (announcementEtag) {
      request.setRequestHeader('If-None-Match', announcementEtag);
    }
    request.onreadystatechange = function () {
      if (request.readyState !== 4 || requestId !== announcementRequestId) {
        return;
      }
      if (request.status === 304) {
        return;
      }
      if (request.status < 200 || request.status >= 300) {
        scheduleAnnouncementRefresh(15000);
        return;
      }

      try {
        var responseEtag = String(request.getResponseHeader('ETag') || '').trim();
        var data = JSON.parse(request.responseText || '{}');
        var announcement = data && data.announcement ? data.announcement : null;

        if (responseEtag) {
          announcementEtag = responseEtag;
        }

        if (!announcement) {
          hideAnnouncement();
        } else {
          renderAnnouncement(announcement);
        }
      } catch (_error) {
        scheduleAnnouncementRefresh(15000);
      }
    };
    request.onerror = function () {
      scheduleAnnouncementRefresh(15000);
    };
    request.ontimeout = function () {
      scheduleAnnouncementRefresh(15000);
    };
    request.send();
  }

  function scheduleAnnouncementPolling() {
    if (announcementPollTimer) {
      window.clearInterval(announcementPollTimer);
    }
    announcementPollTimer = window.setInterval(function () {
      void refreshAnnouncementOverlay();
    }, 15000);
  }

  function scheduleAnnouncementReconnect() {
    if (announcementReconnectTimer) {
      return;
    }
    announcementReconnectTimer = window.setTimeout(function () {
      announcementReconnectTimer = null;
      connectAnnouncementSocket();
    }, 5000);
  }

  function handleAnnouncementSocketMessage(rawMessage) {
    var payload;
    try {
      payload = JSON.parse(String(rawMessage || ''));
    } catch (_error) {
      return;
    }

    if (!payload || payload.type !== 'announcement-refresh') {
      return;
    }

    void refreshAnnouncementOverlay();
  }

  function connectAnnouncementSocket() {
    if (!window.WebSocket) {
      return;
    }
    if (announcementSocket && (announcementSocket.readyState === WebSocket.OPEN || announcementSocket.readyState === WebSocket.CONNECTING)) {
      return;
    }

    var socket = new WebSocket(new URL(announcementSocketPath, window.location.origin).toString());
    announcementSocket = socket;

    socket.onopen = function () {
      void refreshAnnouncementOverlay();
    };

    socket.onmessage = function (event) {
      handleAnnouncementSocketMessage(event.data);
    };

    socket.onclose = function () {
      announcementSocket = null;
      scheduleAnnouncementReconnect();
    };

    socket.onerror = function () {
      try {
        socket.close();
      } catch (_error) {
        // ignore socket close errors
      }
    };
  }

  window.refreshAnnouncementOverlay = refreshAnnouncementOverlay;

  if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', function () {
      void refreshAnnouncementOverlay();
      scheduleAnnouncementPolling();
      connectAnnouncementSocket();
    }, { once: true });
  } else {
    void refreshAnnouncementOverlay();
    scheduleAnnouncementPolling();
    connectAnnouncementSocket();
  }

  window.addEventListener('focus', function () {
    void refreshAnnouncementOverlay();
  });
})();