import axios from "axios";
import { useAuthStore } from "@/stores/auth";
import { useToast } from "vue-toastification";

// Get the API base URL
const getApiBaseUrl = () => {
  // If VITE_API_URL is set, use it
  if (import.meta.env.VITE_API_URL) {
    return import.meta.env.VITE_API_URL;
  }

  // In production, use the api subdomain
  if (import.meta.env.PROD) {
    const currentHost = window.location.hostname;
    const protocol = window.location.protocol;

    // If on turbotrades.dev, use api.turbotrades.dev
    if (
      currentHost === "turbotrades.dev" ||
      currentHost === "www.turbotrades.dev"
    ) {
      return `${protocol}//api.turbotrades.dev/api`;
    }

    // For other domains, try api subdomain
    return `${protocol}//api.${currentHost}/api`;
  }

  // In development, use relative path (Vite proxy handles it)
  return "/api";
};

// Create axios instance
const axiosInstance = axios.create({
  baseURL: getApiBaseUrl(),
  timeout: 15000,
  withCredentials: true,
  headers: {
    "Content-Type": "application/json",
  },
});

// Request interceptor
axiosInstance.interceptors.request.use(
  (config) => {
    // You can add auth token to headers here if needed
    // const token = localStorage.getItem('token')
    // if (token) {
    //   config.headers.Authorization = `Bearer ${token}`
    // }
    return config;
  },
  (error) => {
    return Promise.reject(error);
  }
);

// Response interceptor
axiosInstance.interceptors.response.use(
  (response) => {
    return response;
  },
  async (error) => {
    const toast = useToast();
    const authStore = useAuthStore();

    if (error.response) {
      const { status, data } = error.response;

      switch (status) {
        case 401:
          // Unauthorized - token expired or invalid
          if (data.code === "TokenExpired") {
            // Try to refresh token
            try {
              const refreshed = await authStore.refreshToken();
              if (refreshed) {
                // Retry the original request
                return axiosInstance.request(error.config);
              }
            } catch (refreshError) {
              // Refresh failed, logout user
              authStore.clearUser();
              window.location.href = "/";
            }
          } else {
            authStore.clearUser();
            toast.error("Please login to continue");
          }
          break;

        case 403:
          // Forbidden
          toast.error(data.message || "Access denied");
          break;

        case 404:
          // Not found
          toast.error(data.message || "Resource not found");
          break;

        case 429:
          // Too many requests
          toast.error("Too many requests. Please slow down.");
          break;

        case 500:
          // Server error
          toast.error("Server error. Please try again later.");
          break;

        case 503:
          // Service unavailable - maintenance mode
          if (data.maintenance) {
            // Only redirect if user is not admin
            if (!authStore.isAdmin) {
              window.location.href = "/maintenance";
            }
            // Don't show toast for maintenance, page will handle it
            return Promise.reject(error);
          } else {
            toast.error("Service temporarily unavailable");
          }
          break;

        default:
          // Other errors
          if (data.message) {
            toast.error(data.message);
          }
      }
    } else if (error.request) {
      // Request made but no response
      toast.error("Network error. Please check your connection.");
    } else {
      // Something else happened
      toast.error("An unexpected error occurred");
    }

    return Promise.reject(error);
  }
);

export default axiosInstance;