import { ScheduleAppointment } from '../admin.models';

export type ScheduleStatusTone =
  | 'status-upcoming'
  | 'status-live'
  | 'status-coach-ended'
  | 'status-confirmed'
  | 'status-completed'
  | 'status-archived'
  | 'status-overdue'
  | 'status-cancelled'
  | 'status-neutral';

export type ScheduleStatusFilter =
  | 'all'
  | 'upcoming'
  | 'live'
  | 'coach-ended'
  | 'confirmed'
  | 'completed'
  | 'archived'
  | 'overdue'
  | 'cancelled'
  | 'unassigned';

const scheduleStatusLabels: Partial<Record<number, string>> = {
  0: '待开始',
  10: '上课中',
  11: '陪练已结束',
  20: '学员已确认',
  30: '已完课',
  40: '已归档',
};

export function scheduleStatusTone(
  item: Pick<ScheduleAppointment, 'cancelled' | 'statusCode' | 'endsAt'>,
  now = Date.now(),
): ScheduleStatusTone {
  if (item.cancelled) return 'status-cancelled';
  const endTime = Date.parse(item.endsAt);
  if ((item.statusCode === 0 || item.statusCode === 10) && Number.isFinite(endTime) && endTime < now) return 'status-overdue';
  if (item.statusCode === 0) return 'status-upcoming';
  if (item.statusCode === 10) return 'status-live';
  if (item.statusCode === 11) return 'status-coach-ended';
  if (item.statusCode === 20) return 'status-confirmed';
  if (item.statusCode === 30) return 'status-completed';
  if (item.statusCode === 40) return 'status-archived';
  return 'status-neutral';
}

export function scheduleStatusLabel(
  item: Pick<ScheduleAppointment, 'cancelled' | 'statusCode' | 'statusLabel' | 'endsAt'>,
  now = Date.now(),
): string {
  const tone = scheduleStatusTone(item, now);
  if (tone === 'status-cancelled') return '已取消';
  if (tone === 'status-overdue') return '逾期未完成';
  return scheduleStatusLabels[item.statusCode] || item.statusLabel || `状态 ${item.statusCode}`;
}

export function scheduleMatchesStatus(
  item: Pick<ScheduleAppointment, 'cancelled' | 'statusCode' | 'endsAt' | 'coachId' | 'coachAccountMissing'>,
  filter: ScheduleStatusFilter,
  now = Date.now(),
): boolean {
  if (filter === 'all') return true;
  if (filter === 'unassigned') return !item.coachId || item.coachAccountMissing === true;
  return scheduleStatusTone(item, now) === `status-${filter}`;
}