/* eslint-disable @next/next/no-img-element */
import {User} from "@/interfaces/user";
import {toast, ToastContainer} from "react-toastify";
import axios from "axios";
import {FormEvent, useState} from "react";
import Head from "next/head";
import useUser from "@/hooks/useUser";
import {Divider} from "primereact/divider";
import Button from "@/components/Low/Button";
import {BsArrowRepeat, BsCheck} from "react-icons/bs";
import Link from "next/link";
import Input from "@/components/Low/Input";
import clsx from "clsx";
import {useRouter} from "next/router";

const EMAIL_REGEX = new RegExp(/^[a-zA-Z0-9]+(?:\.[a-zA-Z0-9]+)*@[a-zA-Z0-9]+(?:\.[a-zA-Z0-9]+)*$/g);

export default function Login() {
	const [email, setEmail] = useState("");
	const [password, setPassword] = useState("");
	const [rememberPassword, setRememberPassword] = useState(false);
	const [isLoading, setIsLoading] = useState(false);

	const router = useRouter();

	const {user, mutateUser} = useUser({
		redirectTo: "/",
		redirectIfFound: true,
	});

	const forgotPassword = () => {
		if (!email || email.length < 0 || !EMAIL_REGEX.test(email)) {
			toast.error("Please enter your e-mail to reset your password!", {toastId: "forgot-invalid-email"});
			return;
		}

		axios
			.post<{ok: boolean}>("/api/reset", {email})
			.then((response) => {
				if (response.data.ok) {
					toast.success("You should receive an e-mail to reset your password!", {toastId: "forgot-success"});
					return;
				}

				toast.error("That e-mail address is not connected to an account!", {toastId: "forgot-error"});
			})
			.catch(() => toast.error("That e-mail address is not connected to an account!", {toastId: "forgot-error"}));
	};

	const login = (e: FormEvent<HTMLFormElement>) => {
		e.preventDefault();

		setIsLoading(true);
		axios
			.post<User>("/api/login", {email, password})
			.then((response) => {
				toast.success("You have been logged in!", {toastId: "login-successful"});
				mutateUser(response.data);
			})
			.catch((e) => {
				if (e.response.status === 401) {
					toast.error("Wrong login credentials!", {toastId: "wrong-credentials"});
				} else {
					toast.error("Something went wrong!", {toastId: "server-error"});
				}
				setIsLoading(false);
			})
			.finally(() => setIsLoading(false));
	};

	const sendEmailVerification = () => {
		setIsLoading(true);
		axios
			.post<{ok: boolean}>("/api/reset/sendVerification", {})
			.catch((e) => {
				console.log(e);
				toast.error("Something went wrong, please logout and re-login.", {toastId: "send-verify-error"});
			})
			.finally(() => setIsLoading(false));
	};

	const logout = async () => {
		axios.post("/api/logout").finally(() => {
			setTimeout(() => router.reload(), 500);
		});
	};

	return (
		<>
			<Head>
				<title>Login | EnCoach</title>
				<meta name="description" content="Generated by create next app" />
				<meta name="viewport" content="width=device-width, initial-scale=1" />
				<link rel="icon" href="/favicon.ico" />
			</Head>
			<main className="w-full h-[100vh] flex bg-white text-black">
				<ToastContainer />
				<section className="h-full w-fit min-w-fit relative hidden lg:flex">
					<div className="absolute h-full w-full bg-mti-rose-light z-10 bg-opacity-50" />
					<img src="/people-talking-tablet.png" alt="People smiling looking at a tablet" className="h-full aspect-auto" />
				</section>
				<section className="h-full w-full flex flex-col items-center justify-center gap-2">
					<div className="flex flex-col gap-2 items-center relative">
						<img src="/logo_title.png" alt="EnCoach's Logo" className="w-36 lg:w-64 absolute -top-36 lg:-top-64" />
						<h1 className="font-bold text-2xl lg:text-4xl">Login to your account</h1>
						<p className="self-start text-sm lg:text-base font-normal text-mti-gray-cool">with your registered Email Address</p>
					</div>
					<Divider className="max-w-xs lg:max-w-md" />
					{!user && (
						<>
							<form className="flex flex-col items-center gap-6 w-full -lg:px-8 lg:w-1/2" onSubmit={login}>
								<Input type="email" name="email" onChange={(e) => setEmail(e)} placeholder="Enter email address" />
								<Input type="password" name="password" onChange={(e) => setPassword(e)} placeholder="Password" />
								<div className="flex justify-between w-full px-4">
									<div
										className="flex gap-3 text-mti-gray-dim text-xs cursor-pointer"
										onClick={() => setRememberPassword((prev) => !prev)}>
										<input type="checkbox" className="hidden" />
										<div
											className={clsx(
												"w-4 h-4 rounded-sm flex items-center justify-center border border-mti-purple-light bg-white",
												"transition duration-300 ease-in-out",
												rememberPassword && "!bg-mti-purple-light ",
											)}>
											<BsCheck color="white" className="w-full h-full" />
										</div>
										<span>Remember my password</span>
									</div>
									<span className="text-mti-purple-light text-xs cursor-pointer hover:underline" onClick={forgotPassword}>
										Forgot Password?
									</span>
								</div>
								<Button className="mt-8 w-full" color="purple" disabled={isLoading}>
									{!isLoading && "Login"}
									{isLoading && (
										<div className="flex items-center justify-center">
											<BsArrowRepeat className="text-white animate-spin" size={25} />
										</div>
									)}
								</Button>
							</form>
							<span className="text-mti-gray-cool text-sm font-normal mt-8">
								Don&apos;t have an account?{" "}
								<Link className="text-mti-purple-light" href="/register">
									Sign up
								</Link>
							</span>
						</>
					)}
					{user && !user.isVerified && (
						<>
							<div className="flex flex-col items-center gap-6 w-full -lg:px-8 lg:w-1/2 relative">
								<h4 className="font-semibold text-2xl text-mti-purple-light">Please confirm your account!</h4>
								<span className="text-center">
									An e-mail has been sent to <span className="italic text-mti-purple-light">{user.email}</span>, please click the
									link in it to confirm your account to be able to use the application. <br /> <br />
									Please refresh this page once it has been verified.
								</span>
								<Button className="mt-8 w-full" color="purple" disabled={isLoading} onClick={sendEmailVerification}>
									Resend e-mail
								</Button>
							</div>
							<Divider className="max-w-xs lg:max-w-md" />
							<span className="text-mti-gray-cool text-sm font-normal">
								<button className="text-mti-purple-light" onClick={logout}>
									Log out instead
								</button>
							</span>
						</>
					)}
				</section>
			</main>
		</>
	);
}
