import { api } from './api';
import type {
  FahrzeugBuchungListItem,
  FahrzeugBuchung,
  Fahrzeug,
  CreateBuchungInput,
  MaintenanceWindow,
  BuchungsKategorie,
} from '../types/booking.types';

// ---------------------------------------------------------------------------
// Response shapes from the backend
// ---------------------------------------------------------------------------
interface ApiResponse<T> {
  success: boolean;
  data: T;
}

// ---------------------------------------------------------------------------
// Booking API service
// ---------------------------------------------------------------------------
export const bookingApi = {
  // -------------------------------------------------------------------------
  // Calendar / listing
  // -------------------------------------------------------------------------

  getCalendarRange(
    from: Date,
    to: Date,
    fahrzeugId?: string
  ): Promise<{ bookings: FahrzeugBuchungListItem[]; maintenanceWindows: MaintenanceWindow[] }> {
    return api
      .get<ApiResponse<{ bookings: FahrzeugBuchungListItem[]; maintenanceWindows: MaintenanceWindow[] }>>(
        '/api/bookings/calendar',
        {
          params: {
            from: from.toISOString(),
            to: to.toISOString(),
            ...(fahrzeugId ? { fahrzeugId } : {}),
          },
        }
      )
      .then((r) => r.data.data);
  },

  getUpcoming(limit = 20): Promise<FahrzeugBuchungListItem[]> {
    return api
      .get<ApiResponse<FahrzeugBuchungListItem[]>>('/api/bookings/upcoming', {
        params: { limit },
      })
      .then((r) => r.data.data);
  },

  // -------------------------------------------------------------------------
  // Availability check
  // -------------------------------------------------------------------------

  checkAvailability(
    fahrzeugId: string,
    from: Date,
    to: Date,
    excludeId?: string
  ): Promise<{ available: boolean; reason?: string; ausserDienstVon?: string; ausserDienstBis?: string }> {
    return api
      .get<ApiResponse<{ available: boolean; reason?: string; ausserDienstVon?: string; ausserDienstBis?: string }>>('/api/bookings/availability', {
        params: {
          fahrzeugId,
          from: from.toISOString(),
          to: to.toISOString(),
          ...(excludeId ? { excludeId } : {}),
        },
      })
      .then((r) => r.data.data);
  },

  // -------------------------------------------------------------------------
  // Single booking
  // -------------------------------------------------------------------------

  getById(id: string): Promise<FahrzeugBuchung> {
    return api
      .get<ApiResponse<FahrzeugBuchung>>(`/api/bookings/${id}`)
      .then((r) => r.data.data);
  },

  // -------------------------------------------------------------------------
  // CRUD
  // -------------------------------------------------------------------------

  create(data: CreateBuchungInput): Promise<FahrzeugBuchung> {
    return api
      .post<ApiResponse<FahrzeugBuchung>>('/api/bookings', data)
      .then((r) => r.data.data);
  },

  update(id: string, data: Partial<CreateBuchungInput>): Promise<FahrzeugBuchung> {
    return api
      .patch<ApiResponse<FahrzeugBuchung>>(`/api/bookings/${id}`, data)
      .then((r) => r.data.data);
  },

  cancel(id: string, abgesagt_grund: string): Promise<void> {
    return api
      .patch(`/api/bookings/${id}/cancel`, { abgesagt_grund })
      .then(() => undefined);
  },

  // -------------------------------------------------------------------------
  // iCal
  // -------------------------------------------------------------------------

  getCalendarToken(): Promise<{ token: string; subscribeUrl: string }> {
    return api
      .get<ApiResponse<{ token: string; subscribeUrl: string }>>(
        '/api/bookings/calendar-token'
      )
      .then((r) => r.data.data);
  },
};

// ---------------------------------------------------------------------------
// Booking categories
// ---------------------------------------------------------------------------
export const kategorieApi = {
  getAll: () => api.get<{ success: boolean; data: BuchungsKategorie[] }>('/api/buchungskategorien').then((r) => r.data.data),
  getActive: () => api.get<{ success: boolean; data: BuchungsKategorie[] }>('/api/buchungskategorien/active').then((r) => r.data.data),
  create: (data: Omit<BuchungsKategorie, 'id'>) => api.post<{ success: boolean; data: BuchungsKategorie }>('/api/buchungskategorien', data).then((r) => r.data.data),
  update: (id: number, data: Partial<BuchungsKategorie>) => api.patch<{ success: boolean; data: BuchungsKategorie }>(`/api/buchungskategorien/${id}`, data).then((r) => r.data.data),
  delete: (id: number) => api.delete(`/api/buchungskategorien/${id}`).then((r) => r.data),
};

// ---------------------------------------------------------------------------
// Vehicle helper (shared with booking page)
// ---------------------------------------------------------------------------
export function fetchVehicles(): Promise<Fahrzeug[]> {
  return api
    .get<ApiResponse<Fahrzeug[]>>('/api/bookings/vehicles')
    .then((r) => r.data.data);
}