import { api } from '@services/api/axios-instance';
import type {
  Coupon,
  CreateCouponDto,
  UpdateCouponDto,
  CouponValidation,
  CouponFilters,
  CouponsResponse,
  CouponStats,
  CouponRedemption,
} from '../types';

const BASE_URL = '/api/v1/billing/coupons';

export const couponsApi = {
  getAll: async (filters?: CouponFilters): Promise<CouponsResponse> => {
    const params = new URLSearchParams();
    if (filters?.search) params.append('search', filters.search);
    if (filters?.discountType) params.append('discountType', filters.discountType);
    if (filters?.isActive !== undefined) params.append('isActive', String(filters.isActive));
    if (filters?.page) params.append('page', String(filters.page));
    if (filters?.limit) params.append('limit', String(filters.limit));
    if (filters?.sortBy) params.append('sortBy', filters.sortBy);
    if (filters?.sortOrder) params.append('sortOrder', filters.sortOrder);

    const response = await api.get<CouponsResponse>(`${BASE_URL}?${params.toString()}`);
    return response.data;
  },

  getById: async (id: string): Promise<Coupon> => {
    const response = await api.get<Coupon>(`${BASE_URL}/${id}`);
    return response.data;
  },

  getByCode: async (code: string): Promise<Coupon> => {
    const response = await api.get<Coupon>(`${BASE_URL}/code/${code}`);
    return response.data;
  },

  create: async (data: CreateCouponDto): Promise<Coupon> => {
    const response = await api.post<Coupon>(BASE_URL, data);
    return response.data;
  },

  update: async (id: string, data: UpdateCouponDto): Promise<Coupon> => {
    const response = await api.patch<Coupon>(`${BASE_URL}/${id}`, data);
    return response.data;
  },

  delete: async (id: string): Promise<void> => {
    await api.delete(`${BASE_URL}/${id}`);
  },

  validate: async (code: string, planId?: string, amount?: number): Promise<CouponValidation> => {
    const response = await api.post<CouponValidation>(`${BASE_URL}/validate`, {
      code,
      planId,
      amount,
    });
    return response.data;
  },

  activate: async (id: string): Promise<Coupon> => {
    const response = await api.post<Coupon>(`${BASE_URL}/${id}/activate`);
    return response.data;
  },

  deactivate: async (id: string): Promise<Coupon> => {
    const response = await api.post<Coupon>(`${BASE_URL}/${id}/deactivate`);
    return response.data;
  },

  getStats: async (): Promise<CouponStats> => {
    const response = await api.get<CouponStats>(`${BASE_URL}/stats`);
    return response.data;
  },

  getRedemptions: async (
    couponId: string
  ): Promise<{ data: CouponRedemption[]; total: number }> => {
    const response = await api.get<{ data: CouponRedemption[]; total: number }>(
      `${BASE_URL}/${couponId}/redemptions`
    );
    return response.data;
  },
};