// API region helpers for resolving source data and nested values.

var registry = window.pulsePlayerRegionTypes;
var placeholderUtils = window.placeholderUtils || {};

function getApiSourceById(sourceId) {
  var sources = Array.isArray(initialData && initialData.apiSources) ? initialData.apiSources : [];
  var normalizedId = Number(sourceId || 0);
  return sources.find(function (source) {
    return Number(source.id) === normalizedId;
  }) || null;
}

function getApiSourceItemsPath(source, overridePath) {
  if (overridePath === undefined || overridePath === null) {
    return String(source && (source.items_path || source.itemsPath) || '').trim();
  }

  return String(overridePath || '').trim();
}

function getApiSourceItems(sourceId, itemsPathOverride) {
  var source = getApiSourceById(sourceId);
  var responseJson = source && source.responseJson && typeof source.responseJson === 'object' ? source.responseJson : null;
  var itemsPath = getApiSourceItemsPath(source, itemsPathOverride);
  if (itemsPath !== undefined && itemsPath !== null && itemsPath !== '') {
    var current = responseJson;
    String(itemsPath).split('.').forEach(function (segment) {
      if (current === undefined || current === null) {
        current = '';
        return;
      }
      current = current[segment];
    });
    return Array.isArray(current) ? current : [];
  }
  if (Array.isArray(responseJson)) {
    return responseJson;
  }
  if (responseJson && Array.isArray(responseJson.items)) {
    return responseJson.items;
  }
  if (responseJson && Array.isArray(responseJson.results)) {
    return responseJson.results;
  }
  if (responseJson && Array.isArray(responseJson.data)) {
    return responseJson.data;
  }
  return responseJson ? [responseJson] : [];
}

function getApiItem(sourceId, itemNumber, itemsPathOverride) {
  var items = getApiSourceItems(sourceId, itemsPathOverride);
  var parsedItemNumber = Math.max(1, Number(itemNumber || 1));
  var index = Number.isFinite(parsedItemNumber) && parsedItemNumber > 0 ? parsedItemNumber - 1 : 0;
  return items[index] || null;
}

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

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

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

function getApiPreviewFallback(item) {
  if (!item || typeof item !== 'object') {
    return '';
  }

  var title = String(item.title || item.name || '').trim();
  var description = String(item.description || item.summary || item.text || '').trim();
  var summary = [];
  if (title) {
    summary.push('<h3>' + escapeHtml(title) + '</h3>');
  }
  if (description) {
    summary.push('<div>' + sanitizeRichText(description) + '</div>');
  }
  if (!summary.length) {
    return '';
  }
  return summary.join('');
}

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 renderApiRegion(region, regionContent) {
  var content = normalizeRenderableValue(regionContent && regionContent.value !== undefined ? regionContent.value : '');
  var sourceId = regionContent && regionContent.source_id !== undefined ? regionContent.source_id : null;
  var itemNumber = regionContent && regionContent.item_number !== undefined ? regionContent.item_number : 1;
  var itemsPath = regionContent && regionContent.items_path !== undefined ? regionContent.items_path : '';
  var fontFamily = sanitizeFontFamily(regionContent.font_family || region.fontFamily);
  var fontSize = sanitizeFontSize(regionContent.font_size || region.fontSize);
  var fontColor = sanitizeTextColor(regionContent.font_color || region.fontColor);
  var item = getApiItem(sourceId, itemNumber, itemsPath);
  var body = item ? substituteApiVariables(content, item) : '';
  if (!body && item) {
    body = getApiPreviewFallback(item);
  }
  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 api" style="' + region.baseStyle + '"><div class="template-region-text-scale" style="' + contentStyle + '">' + renderedBody + '</div></div>' : '';
}

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