import axios from "axios";

const api = axios.create({
  baseURL: "/api/v1",
  headers: { "Content-Type": "application/json" },
});

api.interceptors.request.use((config) => {
  const token = localStorage.getItem("access_token");
  if (token) config.headers.Authorization = `Bearer ${token}`;
  return config;
});

api.interceptors.response.use(
  (r) => r,
  async (error) => {
    const original = error.config;
    if (error.response?.status === 401 && !original._retry) {
      original._retry = true;
      const refresh = localStorage.getItem("refresh_token");
      if (refresh) {
        try {
          const { data } = await axios.post("/api/v1/auth/refresh", null, {
            params: { refresh_token: refresh },
          });
          localStorage.setItem("access_token", data.access_token);
          localStorage.setItem("refresh_token", data.refresh_token);
          original.headers.Authorization = `Bearer ${data.access_token}`;
          return api(original);
        } catch {
          localStorage.clear();
          window.location.href = "/login";
        }
      }
    }
    return Promise.reject(error);
  }
);

// ── Auth ────────────────────────────────────────────────
export const login = (username, password) =>
  api.post("/auth/login/json", { username, password });
export const register = (data) => api.post("/auth/register", data);
export const getMe = () => api.get("/users/me");

// ── Users (admin) ────────────────────────────────────────
export const getUsers = () => api.get("/users");
export const updateUser = (id, data) => api.patch(`/users/${id}`, data);
export const deleteUser = (id) => api.delete(`/users/${id}`);

// ── Currencies ───────────────────────────────────────────
export const getCurrencies = () => api.get("/currencies");
export const createCurrency = (d) => api.post("/currencies", d);
export const updateCurrency = (id, d) => api.patch(`/currencies/${id}`, d);
export const deleteCurrency = (id) => api.delete(`/currencies/${id}`);

// ── Exchange rates ────────────────────────────────────────
export const getExchangeRates = (params) => api.get("/exchange-rates", { params });
export const createExchangeRate = (d) => api.post("/exchange-rates", d);
export const deleteExchangeRate = (id) => api.delete(`/exchange-rates/${id}`);

// ── Accounts ──────────────────────────────────────────────
export const getAccountTypes = () => api.get("/accounts/types");
export const getAccounts = () => api.get("/accounts");
export const createAccount = (d) => api.post("/accounts", d);
export const updateAccount = (id, d) => api.patch(`/accounts/${id}`, d);
export const deleteAccount = (id) => api.delete(`/accounts/${id}`);

// ── Categories ────────────────────────────────────────────
export const getCategories = () => api.get("/categories");
export const createCategory = (d) => api.post("/categories", d);
export const updateCategory = (id, d) => api.patch(`/categories/${id}`, d);
export const deleteCategory = (id) => api.delete(`/categories/${id}`);

// ── Budgets ───────────────────────────────────────────────
export const getBudgets = () => api.get("/budgets");
export const createBudget = (d) => api.post("/budgets", d);
export const updateBudget = (id, d) => api.patch(`/budgets/${id}`, d);
export const deleteBudget = (id) => api.delete(`/budgets/${id}`);

// ── Locations ─────────────────────────────────────────────
export const getLocations = () => api.get("/locations");
export const createLocation = (d) => api.post("/locations", d);
export const updateLocation = (id, d) => api.patch(`/locations/${id}`, d);
export const deleteLocation = (id) => api.delete(`/locations/${id}`);

// ── Operations ────────────────────────────────────────────
export const getOperationTypes = () => api.get("/operations/types");
export const getOperations = (params) => api.get("/operations", { params });
export const createOperation = (d) => api.post("/operations", d);
export const createTransfer = (d) => api.post("/operations/transfer", d);
export const updateOperation = (id, d) => api.patch(`/operations/${id}`, d);
export const deleteOperation = (id) => api.delete(`/operations/${id}`);

// ── Calendar ──────────────────────────────────────────────
export const getCalendarEvents = (params) => api.get("/calendar", { params });
export const createCalendarEvent = (d) => api.post("/calendar", d);
export const updateCalendarEvent = (id, d) => api.patch(`/calendar/${id}`, d);
export const deleteCalendarEvent = (id) => api.delete(`/calendar/${id}`);

export default api;