/**
 * Customers resource – Real HTTP implementation.
 * Endpoints: GET/POST /api/customers, GET/PUT /api/customers/{id},
 *   POST /api/customers/{id}/activate|deactivate,
 *   POST /api/customers/{id}/delivery-addresses,
 *   DELETE /api/customers/{id}/delivery-addresses/{label},
 *   PUT /api/customers/{id}/frame-contract,
 *   DELETE /api/customers/{id}/frame-contract,
 *   PUT /api/customers/{id}/preferences
 *
 * DELETE delivery-addresses/{label} and DELETE frame-contract return 204 → re-fetch.
 */

import type { AxiosInstance } from 'axios';
import type {
  CustomerDTO,
  DeliveryAddressDTO,
  FrameContractDTO,
  ContractLineItemDTO,
  CreateCustomerRequest,
  UpdateCustomerRequest,
  AddDeliveryAddressRequest,
  SetFrameContractRequest,
} from '@effigenix/types';

export type CustomerType = 'B2B' | 'B2C';
export type CustomerStatus = 'ACTIVE' | 'INACTIVE';
export type CustomerPreference =
  | 'BIO'
  | 'REGIONAL'
  | 'TIERWOHL'
  | 'HALAL'
  | 'KOSHER'
  | 'GLUTENFREI'
  | 'LAKTOSEFREI';
export type DeliveryRhythm = 'DAILY' | 'WEEKLY' | 'BIWEEKLY' | 'MONTHLY' | 'ON_DEMAND';

export const CUSTOMER_PREFERENCE_LABELS: Record<CustomerPreference, string> = {
  BIO: 'Bio',
  REGIONAL: 'Regional',
  TIERWOHL: 'Tierwohl',
  HALAL: 'Halal',
  KOSHER: 'Koscher',
  GLUTENFREI: 'Glutenfrei',
  LAKTOSEFREI: 'Laktosefrei',
};

export const DELIVERY_RHYTHM_LABELS: Record<DeliveryRhythm, string> = {
  DAILY: 'Täglich',
  WEEKLY: 'Wöchentlich',
  BIWEEKLY: 'Zweiwöchentlich',
  MONTHLY: 'Monatlich',
  ON_DEMAND: 'Nach Bedarf',
};

export type {
  CustomerDTO,
  DeliveryAddressDTO,
  FrameContractDTO,
  ContractLineItemDTO,
  CreateCustomerRequest,
  UpdateCustomerRequest,
  AddDeliveryAddressRequest,
  SetFrameContractRequest,
};

// ── Resource factory ─────────────────────────────────────────────────────────

export function createCustomersResource(client: AxiosInstance) {
  return {
    async list(): Promise<CustomerDTO[]> {
      const res = await client.get<CustomerDTO[]>('/api/customers');
      return res.data;
    },

    async getById(id: string): Promise<CustomerDTO> {
      const res = await client.get<CustomerDTO>(`/api/customers/${id}`);
      return res.data;
    },

    async create(request: CreateCustomerRequest): Promise<CustomerDTO> {
      const res = await client.post<CustomerDTO>('/api/customers', request);
      return res.data;
    },

    async update(id: string, request: UpdateCustomerRequest): Promise<CustomerDTO> {
      const res = await client.put<CustomerDTO>(`/api/customers/${id}`, request);
      return res.data;
    },

    async activate(id: string): Promise<CustomerDTO> {
      const res = await client.post<CustomerDTO>(`/api/customers/${id}/activate`);
      return res.data;
    },

    async deactivate(id: string): Promise<CustomerDTO> {
      const res = await client.post<CustomerDTO>(`/api/customers/${id}/deactivate`);
      return res.data;
    },

    async addDeliveryAddress(id: string, request: AddDeliveryAddressRequest): Promise<CustomerDTO> {
      const res = await client.post<CustomerDTO>(
        `/api/customers/${id}/delivery-addresses`,
        request,
      );
      return res.data;
    },

    // Returns 204 No Content → re-fetch customer
    async removeDeliveryAddress(id: string, label: string): Promise<CustomerDTO> {
      await client.delete(`/api/customers/${id}/delivery-addresses/${encodeURIComponent(label)}`);
      const res = await client.get<CustomerDTO>(`/api/customers/${id}`);
      return res.data;
    },

    async setFrameContract(id: string, request: SetFrameContractRequest): Promise<CustomerDTO> {
      const res = await client.put<CustomerDTO>(
        `/api/customers/${id}/frame-contract`,
        request,
      );
      return res.data;
    },

    // Returns 204 No Content → re-fetch customer
    async removeFrameContract(id: string): Promise<CustomerDTO> {
      await client.delete(`/api/customers/${id}/frame-contract`);
      const res = await client.get<CustomerDTO>(`/api/customers/${id}`);
      return res.data;
    },

    async setPreferences(id: string, preferences: CustomerPreference[]): Promise<CustomerDTO> {
      const res = await client.put<CustomerDTO>(`/api/customers/${id}/preferences`, {
        preferences,
      });
      return res.data;
    },
  };
}

export type CustomersResource = ReturnType<typeof createCustomersResource>;