import axios, { type AxiosError } from "axios";
import type { Session } from "next-auth";
import { getSession } from "next-auth/react";
import { redirect } from "next/navigation";

axios.defaults.xsrfCookieName = "csrftoken";
axios.defaults.xsrfHeaderName = "X-CSRFToken";

const ApiClient = () => {
	const instance = axios.create({
		baseURL: process.env.SARLINK_API_BASE_URL,
		headers: {
			Accept: "application/json",
		},
	});

	let lastSession: Session | null = null;

	instance.interceptors.request.use(
		async (request) => {
			if (lastSession == null || Date.now() > Date.parse(lastSession.expires)) {
				const session = await getSession();
				lastSession = session;
			}

			if (lastSession) {
				request.headers.Authorization = `Token ${lastSession.apiToken}`;
			} else {
				request.headers.Authorization = undefined;
				return redirect("/auth/signin");
			}

			return request;
		},
		(error) => {
			console.error("API Error: ", error);
			throw error;
		},
	);
	instance.interceptors.response.use(
		async (response) => {
			return response;
		},
		async (error: AxiosError) => {
			if (error?.response?.status === 401) {
				return redirect("/auth/signin");
			}
			return Promise.reject(error);
		},
	);

	return instance;
};

export const AxiosClient = ApiClient();