import { format } from 'date-fns';
import { HttpCheckStatus, ServiceCheckData } from '../../../../common/lib/http-check-data.module';

/**
 * // Enhance data for displaying as stacked progress bar
 * @param start Start time (left boundary) for status timeline
 * @param end End time (right boundary) for status timeline
 * @param rawData The raw data array from the api response
 * @returns Data for displaying as stacked progress bar using ServiceTimelineWidget[data]
 */
export function convertToStatusTimelineData(start: Date, end: Date, rawData?: ServiceCheckData[]) {
  const diffMs = end.getTime() - start.getTime();

  const data: Partial<StatusTimelineData>[] = [];
  if (rawData?.length) {
    let lastEntry: Partial<StatusTimelineData> | undefined = undefined;
    const diffPerc = ((rawData[0].time.getTime() - start.getTime()) / diffMs) * 100;
    if (diffPerc > 0) {
      lastEntry = {
        statusText: `[${format(rawData[0].time, 'HH:mm:ss')}] ${rawData[0].data.map(dx => dx.message).join(', ')}`,
        statusClass: mapStatusClass(rawData[0])
      };
      data.push(lastEntry);
    }
    let sumwidth = 0;
    rawData.forEach((d, i) => {
      if (lastEntry) {
        lastEntry.width = ((d.time.getTime() - start.getTime()) / diffMs) * 100 - sumwidth;
        sumwidth += lastEntry.width;
      }

      lastEntry = {
        statusText: `[${format(d.time, 'HH:mm:ss')}] ${d.data.map(dx => dx.message).join(', ')}`,
        statusClass: mapStatusClass(d)
      };
      data.push(lastEntry);
    });

    if (sumwidth < 100 && lastEntry && !lastEntry.width) {
      lastEntry.width = 100 - sumwidth;
    }
  } else {
    data.push({
      width: 100,
      statusClass: 'bg-progress',
      statusText: '- no data -'
    });
  }
  return data as StatusTimelineData[];
}

export function mapStatusClass(data: ServiceCheckData) {
  const maxStatus = data.data.reduce((res, d) => (res = Math.max(res, d.status)), 0);
  switch (maxStatus) {
    case HttpCheckStatus.OK:
      return 'bg-peak';
    default:
      return 'bg-max';
  }
}