// Timetable region rendering for live playback.

var registry = window.pulsePlayerRegionTypes;

function substituteTimetableVariables(html, entry) {
  var source = String(html || '');
  return source.replace(/\{\{\s*([^{}]+?)\s*\}\}/g, function (_match, expression) {
    if (!entry || typeof entry !== 'object') {
      return '';
    }

    if (!window.placeholderUtils || typeof window.placeholderUtils.resolvePlaceholderExpression !== 'function' || typeof window.placeholderUtils.formatPlaceholderValue !== 'function') {
      return '';
    }

    return escapeHtml(window.placeholderUtils.formatPlaceholderValue(window.placeholderUtils.resolvePlaceholderExpression(entry, expression)));
  });
}

function renderTemplate(template, context) {
  var source = String(template || '');
  if (!source) {
    return '';
  }
  return substituteTimetableVariables(source, context);
}

function getTimetableGroups() {
  return Array.isArray(initialData && initialData.timetableGroups) ? initialData.timetableGroups : [];
}

function getGroupById(groupId, groups) {
  var normalizedId = Number(groupId || 0);
  return (Array.isArray(groups) ? groups : getTimetableGroups()).find(function (group) {
    return Number(group.id) === normalizedId;
  }) || null;
}

function getEntries(groupId, groups) {
  var group = getGroupById(groupId, groups);
  return group && Array.isArray(group.entries) ? group.entries : [];
}

function toDate(value) {
  if (!value) {
    return null;
  }
  var date = value instanceof Date ? value : new Date(value);
  return Number.isNaN(date.getTime()) ? null : date;
}

function isUpcoming(entry, now) {
  var start = toDate(entry && entry.start_datetime);
  return Boolean(start && now < start);
}

function isLive(entry, now) {
  var start = toDate(entry && entry.start_datetime);
  var end = toDate(entry && entry.end_datetime);
  return Boolean(start && end && now >= start && now < end);
}

function getVisibleEntries(groupId, displayMode, maxItems, groups) {
  var now = new Date();
  var entries = getEntries(groupId, groups).slice().sort(function (left, right) {
    var leftStart = toDate(left && left.start_datetime);
    var rightStart = toDate(right && right.start_datetime);
    return (leftStart ? leftStart.getTime() : 0) - (rightStart ? rightStart.getTime() : 0) || Number(left.id || 0) - Number(right.id || 0);
  });
  var mode = String(displayMode || 'upcoming').trim().toLowerCase();

  entries = entries.filter(function (entry) {
    if (mode === 'current') {
      return isLive(entry, now);
    }
    if (mode === 'both') {
      return isUpcoming(entry, now) || isLive(entry, now);
    }
    return isUpcoming(entry, now);
  });

  if (!entries.length && mode === 'upcoming') {
    entries = getEntries(groupId, groups).filter(function (entry) {
      return isLive(entry, now);
    });
  }

  return entries.slice(0, Math.max(1, Number(maxItems || 5)));
}

function formatDateTime(value) {
  var date = toDate(value);
  if (!date) {
    return '';
  }

  try {
    return new Intl.DateTimeFormat(undefined, {
      month: 'short',
      day: '2-digit',
      hour: 'numeric',
      minute: '2-digit'
    }).format(date);
  } catch (_error) {
    return date.toLocaleString();
  }
}

function getDefaultStyle() {
  return {
    font_family: 'Arial',
    font_size: 28,
    font_color: '#000000'
  };
}

function getTextStyle(region, regionContent) {
  var current = regionContent && typeof regionContent === 'object' ? regionContent : {};
  var defaultStyle = getDefaultStyle();
  return {
    font_family: String(current.font_family || region.font_family || defaultStyle.font_family || 'Arial').trim() || 'Arial',
    font_size: Math.max(8, Number(current.font_size || region.font_size || defaultStyle.font_size || 28)),
    font_color: String(current.font_color || region.font_color || defaultStyle.font_color || '#000000').trim() || '#000000'
  };
}

function renderRegion(region, regionContent) {
  var value = String(regionContent && (regionContent.value !== undefined ? regionContent.value : regionContent.text !== undefined ? regionContent.text : '') || '').trim();
  var style = getTextStyle(region, regionContent || {});
  var groups = getTimetableGroups();
  var groupId = regionContent && regionContent.timetable_group_id !== undefined ? regionContent.timetable_group_id : '';
  var displayMode = regionContent && regionContent.display_mode ? regionContent.display_mode : 'upcoming';
  var maxItems = regionContent && regionContent.max_items !== undefined ? regionContent.max_items : 5;
  var group = getGroupById(groupId, groups);
  var entries = getVisibleEntries(groupId, displayMode, maxItems, groups);
  var timeZone = group && (group.timezone || group.time_zone) ? String(group.timezone || group.time_zone) : '';
  var width = Math.max(1, Math.round(Number(region && region.pixelWidth ? region.pixelWidth : 0) || 1));
  var height = Math.max(1, Math.round(Number(region && region.pixelHeight ? region.pixelHeight : 0) || 1));
  var canvasScale = Number(region && region.canvasScale ? region.canvasScale : 1) || 1;
  var contentStyle = 'width:' + width + 'px;height:' + height + 'px;transform:scale(' + canvasScale + ');transform-origin:top left;' + (style.font_family ? 'font-family:' + escapeHtml(style.font_family) + ';' : '') + (style.font_size ? 'font-size:' + Math.max(1, Math.round(Number(style.font_size))) + 'px;' : '') + (style.font_color ? 'color:' + escapeHtml(style.font_color) + ';' : '');

  if (!value) {
    return '<div class="template-region timetable" style="' + region.baseStyle + '"><div class="template-region-text-scale" style="' + contentStyle + ' overflow:hidden;"></div></div>';
  }

  return '<div class="template-region timetable" style="' + region.baseStyle + '"><div class="template-region-text-scale" style="' + contentStyle + ' overflow:hidden;">' + entries.map(function (entry, index) {
    return '<div class="timetable-region-entry" data-timetable-entry-index="' + index + '">' + sanitizeRichText(substituteTimetableVariables(value, Object.assign({}, entry || {}, {
      start: entry && entry.start_datetime !== undefined ? entry.start_datetime : '',
      end: entry && entry.end_datetime !== undefined ? entry.end_datetime : '',
      timeZone: timeZone,
      group: group || {},
      entries: entries,
      index: index + 1
    }))) + '</div>';
  }).join('') + '</div></div>';
}

registry.register('timetable', {
  renderRegion: renderRegion
});