export const STAT_BLUE = '#5470c6';
export const STAT_GREEN = '#91cc75';
export const STAT_ORANGE = '#fac858';

export function getDefaultDateRange(): [Date, Date] {
  const today = new Date();
  const oneMonthAgo = new Date(today.getFullYear(), today.getMonth() - 1, today.getDate());
  return [oneMonthAgo, today];
}

function toDate(v: Date | { toDate?: () => Date }): Date {
  if (v && typeof (v as { toDate?: () => Date }).toDate === 'function') {
    return (v as { toDate: () => Date }).toDate();
  }
  return v as Date;
}

export function formatDateTimeRangeFromRangePicker(
  start: Date | { toDate?: () => Date },
  end: Date | { toDate?: () => Date }
): { startTime: string; endTime: string } {
  const s = toDate(start);
  const e = toDate(end);
  const startDate = new Date(s);
  startDate.setHours(0, 0, 0, 0);
  const endDate = new Date(e);
  endDate.setHours(23, 59, 59, 999);
  return { startTime: formatDateTime(startDate), endTime: formatDateTime(endDate) };
}

export function formatDateTime(date: Date): string {
  const y = date.getFullYear();
  const m = String(date.getMonth() + 1).padStart(2, '0');
  const d = String(date.getDate()).padStart(2, '0');
  const h = String(date.getHours()).padStart(2, '0');
  const min = String(date.getMinutes()).padStart(2, '0');
  const sec = String(date.getSeconds()).padStart(2, '0');
  return `${y}-${m}-${d} ${h}:${min}:${sec}`;
}

export function chartMinWidth(categories: number, perItem = 48) {
  return Math.max(360, categories * perItem);
}