// RSS region helpers for resolving feeds, items, and nested values.

var registry = window.pulsePlayerRegionTypes;

function getDefaultStyle() {
  return {
    font_family: 'Arial',
    font_size: 32,
    font_color: '#000000'
  };
}

function normalizeRenderableValue(value) {
  if (value && typeof value === 'object') {
    if (value.value !== undefined) {
      return value.value;
    }
    if (value.text !== undefined) {
      return value.text;
    }
    if (value.html !== undefined) {
      return value.html;
    }
    try {
      return JSON.stringify(value);
    } catch (_error) {
      return '';
    }
  }
  return value;
}

function getRssFeedById(feedId) {
  var feeds = Array.isArray(initialData && initialData.rssFeeds) ? initialData.rssFeeds : [];
  var normalizedId = Number(feedId || 0);
  return feeds.find(function (feed) {
    return Number(feed.id) === normalizedId;
  }) || null;
}

function getRssFeedItem(feedId, itemNumber) {
  var feed = getRssFeedById(feedId);
  var items = feed && Array.isArray(feed.items) ? feed.items : [];
  var parsedItemNumber = Math.max(1, Number(itemNumber || 1));
  var index = Number.isFinite(parsedItemNumber) && parsedItemNumber > 0 ? parsedItemNumber - 1 : 0;
  return items[index] || null;
}

function resolveRssPath(value, path) {
  var current = value;
  if (!path) {
    return current;
  }

  String(path).split('.').forEach(function (segment) {
    if (current === undefined || current === null) {
      current = '';
      return;
    }
    current = current[segment];
  });

  return current === undefined || current === null ? '' : current;
}

function substituteRssVariables(html, item) {
  var source = String(html || '');
  return source.replace(/\{\{\s*([a-zA-Z0-9_]+)(?:\.([a-zA-Z0-9_.]+))?\s*\}\}/g, function (_match, tokenName, tokenPath) {
    if (!item || typeof item !== 'object') {
      return '';
    }
    var key = tokenPath ? tokenName + '.' + tokenPath : tokenName;
    return escapeHtml(resolveRssPath(item, key || ''));
  });
}

function renderRssRegion(region, regionContent) {
  var content = normalizeRenderableValue(regionContent && regionContent.value !== undefined ? regionContent.value : '');
  var feedId = regionContent && regionContent.feed_id !== undefined ? regionContent.feed_id : null;
  var itemNumber = regionContent && regionContent.item_number !== undefined ? regionContent.item_number : 1;
  var defaultStyle = getDefaultStyle();
  var fontFamily = sanitizeFontFamily(regionContent.font_family || region.fontFamily || defaultStyle.font_family);
  var fontSize = sanitizeFontSize(regionContent.font_size || region.fontSize || defaultStyle.font_size);
  var fontColor = sanitizeTextColor(regionContent.font_color || region.fontColor || defaultStyle.font_color);
  var item = getRssFeedItem(feedId, itemNumber);
  var body = item ? substituteRssVariables(content, item) : '';
  if (!body && item) {
    var summaryParts = [];
    if (item.title) {
      summaryParts.push('<h3>' + escapeHtml(item.title) + '</h3>');
    }
    if (item.description) {
      summaryParts.push('<div>' + sanitizeRichText(item.description) + '</div>');
    }
    body = summaryParts.join('');
  }
  var contentStyle = 'width:' + region.pixelWidth + 'px;height:' + region.pixelHeight + 'px;transform:scale(' + region.canvasScale + ');transform-origin:top left;' + (fontFamily ? 'font-family:' + escapeHtml(fontFamily) + ';' : '') + 'font-size:' + fontSize + 'px;color:' + escapeHtml(fontColor) + ';';
  if (!body) {
    return '';
  }
  var renderedBody = renderEditorJsContent(body);
  return renderedBody ? '<div class="template-region rss" style="' + region.baseStyle + '"><div class="template-region-text-scale" style="' + contentStyle + '">' + renderedBody + '</div></div>' : '';
}

registry.register('rss', {
  getDefaultStyle: getDefaultStyle,
  renderRegion: renderRssRegion
});