/* eslint-disable @next/next/no-img-element */
import Head from "next/head";
import {withIronSessionSsr} from "iron-session/next";
import {sessionOptions} from "@/lib/session";
import {ChangeEvent, useEffect, useRef, useState} from "react";
import useUser from "@/hooks/useUser";
import {toast, ToastContainer} from "react-toastify";
import Layout from "@/components/High/Layout";
import Input from "@/components/Low/Input";
import Button from "@/components/Low/Button";
import Link from "next/link";
import axios from "axios";
import {ErrorMessage} from "@/constants/errors";
import {RadioGroup} from "@headlessui/react";
import clsx from "clsx";
import {EmploymentStatus, EMPLOYMENT_STATUS, Gender, User} from "@/interfaces/user";
import CountrySelect from "@/components/Low/CountrySelect";
import {shouldRedirectHome} from "@/utils/navigation.disabled";
import moment from "moment";
import {BsCamera, BsCameraFill} from "react-icons/bs";
import {USER_TYPE_LABELS} from "@/resources/user";
import useGroups from "@/hooks/useGroups";
import useUsers from "@/hooks/useUsers";

export const getServerSideProps = withIronSessionSsr(({req, res}) => {
	const user = req.session.user;

	if (!user || !user.isVerified) {
		res.setHeader("location", "/login");
		res.statusCode = 302;
		res.end();
		return {
			props: {
				user: null,
			},
		};
	}

	if (shouldRedirectHome(user)) {
		res.setHeader("location", "/");
		res.statusCode = 302;
		res.end();
		return {
			props: {
				user: null,
			},
		};
	}

	return {
		props: {user: req.session.user},
	};
}, sessionOptions);

interface Props {
	user: User;
	mutateUser: Function;
}

function UserProfile({user, mutateUser}: Props) {
	const [bio, setBio] = useState(user.bio || "");
	const [name, setName] = useState(user.name || "");
	const [email, setEmail] = useState(user.email || "");
	const [password, setPassword] = useState("");
	const [newPassword, setNewPassword] = useState("");
	const [isLoading, setIsLoading] = useState(false);
	const [profilePicture, setProfilePicture] = useState(user.profilePicture);

	const [country, setCountry] = useState<string>(user.demographicInformation?.country || "");
	const [phone, setPhone] = useState<string>(user.demographicInformation?.phone || "");
	const [gender, setGender] = useState<Gender | undefined>(user.demographicInformation?.gender || undefined);
	const [employment, setEmployment] = useState<EmploymentStatus | undefined>(
		user.type === "corporate" ? undefined : user.demographicInformation?.employment,
	);
	const [position, setPosition] = useState<string | undefined>(user.type === "corporate" ? user.demographicInformation?.position : undefined);
	const [companyName, setCompanyName] = useState<string | undefined>(user.type === "agent" ? user.agentInformation?.companyName : undefined);
	const [commercialRegistration, setCommercialRegistration] = useState<string | undefined>(
		user.type === "agent" ? user.agentInformation?.commercialRegistration : undefined,
	);

	const {groups} = useGroups();
	const {users} = useUsers();

	const profilePictureInput = useRef(null);
	const expirationDateColor = (date: Date) => {
		const momentDate = moment(date);
		const today = moment(new Date());

		if (today.add(1, "days").isAfter(momentDate)) return "!bg-mti-red-ultralight border-mti-red-light";
		if (today.add(3, "days").isAfter(momentDate)) return "!bg-mti-rose-ultralight border-mti-rose-light";
		if (today.add(7, "days").isAfter(momentDate)) return "!bg-mti-orange-ultralight border-mti-orange-light";
	};

	const convertBase64 = (file: File) => {
		return new Promise((resolve, reject) => {
			const fileReader = new FileReader();
			fileReader.readAsDataURL(file);
			fileReader.onload = () => {
				resolve(fileReader.result);
			};
			fileReader.onerror = (error) => {
				reject(error);
			};
		});
	};

	const uploadProfilePicture = async (event: ChangeEvent<HTMLInputElement>) => {
		if (event.target.files && event.target.files[0]) {
			const picture = event.target.files[0];
			const base64 = await convertBase64(picture);
			setProfilePicture(base64 as string);
		}
	};

	const updateUser = async () => {
		setIsLoading(true);
		if (email !== user?.email && !password) {
			toast.error("To update your e-mail you need to input your password!");
			setIsLoading(false);
			return;
		}

		if (newPassword && !password) {
			toast.error("To update your password you need to input your current one!");
			setIsLoading(false);
			return;
		}

		if (email !== user?.email) {
			const userAdmins = groups.filter((x) => x.participants.includes(user.id)).map((x) => x.admin);
			const message =
				users.filter((x) => userAdmins.includes(x.id) && x.type === "corporate").length > 0
					? "If you change your e-mail address, you will lose all benefits from your university/institute. Are you sure you want to continue?"
					: "Are you sure you want to update your e-mail address?";

			if (!confirm(message)) {
				setIsLoading(false);
				return;
			}
		}

		const request = await axios.post("/api/users/update", {
			bio,
			name,
			email,
			password,
			newPassword,
			profilePicture,
			demographicInformation: {
				phone,
				country,
				employment: user?.type === "corporate" ? undefined : employment,
				position: user?.type === "corporate" ? position : undefined,
				gender,
			},
		});
		if (request.status === 200) {
			toast.success("Your profile has been updated!");
			mutateUser((request.data as {user: User}).user);
			setIsLoading(false);
			return;
		}

		toast.error((request.data as ErrorMessage).message);
		setIsLoading(false);
	};

	return (
		<Layout user={user}>
			<section className="w-full flex flex-col gap-4 md:gap-8 px-4 py-8">
				<h1 className="text-4xl font-bold mb-6 md:hidden">Edit Profile</h1>
				<div className="flex -md:flex-col-reverse -md:items-center w-full justify-between">
					<div className="flex flex-col gap-8 w-full md:w-2/3">
						<h1 className="text-4xl font-bold mb-6 -md:hidden">Edit Profile</h1>
						<form className="flex flex-col items-center gap-6 w-full">
							<div className="flex flex-col md:flex-row gap-8 w-full">
								<Input
									label="Name"
									type="text"
									name="name"
									onChange={(e) => setName(e)}
									placeholder="Enter your name"
									defaultValue={name}
									required
								/>
								<Input
									label="E-mail Address"
									type="email"
									name="email"
									onChange={(e) => setEmail(e)}
									placeholder="Enter email address"
									defaultValue={email}
									required
								/>
							</div>
							<div className="flex flex-col md:flex-row gap-8 w-full">
								<Input
									label="Current Password"
									type="password"
									name="password"
									onChange={(e) => setPassword(e)}
									placeholder="Enter your password"
									required
								/>
								<Input
									label="New Password"
									type="password"
									name="newPassword"
									onChange={(e) => setNewPassword(e)}
									placeholder="Enter your new password (optional)"
								/>
							</div>

							{user.type === "agent" && (
								<div className="grid grid-cols-1 md:grid-cols-2 gap-8 w-full">
									<Input
										label="Corporate Name"
										type="text"
										name="companyName"
										onChange={() => null}
										placeholder="Enter corporate name"
										defaultValue={companyName}
										disabled
									/>
									<Input
										label="Commercial Registration"
										type="text"
										name="commercialRegistration"
										onChange={() => null}
										placeholder="Enter commercial registration"
										defaultValue={commercialRegistration}
										disabled
									/>
								</div>
							)}

							<div className="flex flex-col md:flex-row gap-8 w-full">
								<div className="flex flex-col gap-3 w-full">
									<label className="font-normal text-base text-mti-gray-dim">Country *</label>
									<CountrySelect value={country} onChange={setCountry} />
								</div>
								<Input
									type="tel"
									name="phone"
									label="Phone number"
									onChange={(e) => setPhone(e)}
									placeholder="Enter phone number"
									defaultValue={phone}
									required
								/>
							</div>
							<div className="flex flex-col md:flex-row gap-8 w-full">
								{user.type === "corporate" && (
									<Input
										name="position"
										onChange={setPosition}
										defaultValue={position}
										type="text"
										label="Position"
										placeholder="CEO, Head of Marketing..."
										required
									/>
								)}
								{user.type !== "corporate" && (
									<div className="relative flex flex-col gap-3 w-full">
										<label className="font-normal text-base text-mti-gray-dim">Employment Status *</label>
										<RadioGroup
											value={employment}
											onChange={setEmployment}
											className="grid grid-cols-2 items-center gap-4 place-items-center">
											{EMPLOYMENT_STATUS.map(({status, label}) => (
												<RadioGroup.Option value={status} key={status}>
													{({checked}) => (
														<span
															className={clsx(
																"px-6 py-4 w-40 md:w-48 flex justify-center text-sm font-normal rounded-full border focus:outline-none cursor-pointer",
																"transition duration-300 ease-in-out",
																!checked
																	? "bg-white border-mti-gray-platinum"
																	: "bg-mti-purple-light border-mti-purple-dark text-white",
															)}>
															{label}
														</span>
													)}
												</RadioGroup.Option>
											))}
										</RadioGroup>
									</div>
								)}
								<div className="flex flex-col gap-8 w-full">
									<div className="relative flex flex-col gap-3 w-full">
										<label className="font-normal text-base text-mti-gray-dim">Gender *</label>
										<RadioGroup value={gender} onChange={setGender} className="flex flex-row gap-4 justify-between">
											<RadioGroup.Option value="male">
												{({checked}) => (
													<span
														className={clsx(
															"px-6 py-4 w-28 flex justify-center text-sm font-normal rounded-full border focus:outline-none cursor-pointer",
															"transition duration-300 ease-in-out",
															!checked
																? "bg-white border-mti-gray-platinum"
																: "bg-mti-purple-light border-mti-purple-dark text-white",
														)}>
														Male
													</span>
												)}
											</RadioGroup.Option>
											<RadioGroup.Option value="female">
												{({checked}) => (
													<span
														className={clsx(
															"px-6 py-4 w-28 flex justify-center text-sm font-normal rounded-full border focus:outline-none cursor-pointer",
															"transition duration-300 ease-in-out",
															!checked
																? "bg-white border-mti-gray-platinum"
																: "bg-mti-purple-light border-mti-purple-dark text-white",
														)}>
														Female
													</span>
												)}
											</RadioGroup.Option>
											<RadioGroup.Option value="other">
												{({checked}) => (
													<span
														className={clsx(
															"px-6 py-4 w-28 flex justify-center text-sm font-normal rounded-full border focus:outline-none cursor-pointer",
															"transition duration-300 ease-in-out",
															!checked
																? "bg-white border-mti-gray-platinum"
																: "bg-mti-purple-light border-mti-purple-dark text-white",
														)}>
														Other
													</span>
												)}
											</RadioGroup.Option>
										</RadioGroup>
									</div>
									<div className="flex flex-col gap-3">
										<label className="font-normal text-base text-mti-gray-dim">Expiry Date (click to purchase)</label>
										<Link
											href="/payment"
											className={clsx(
												"p-6 w-full flex justify-center text-sm font-normal rounded-full border focus:outline-none cursor-pointer",
												"transition duration-300 ease-in-out",
												!user.subscriptionExpirationDate
													? "!bg-mti-green-ultralight !border-mti-green-light"
													: expirationDateColor(user.subscriptionExpirationDate),
												"bg-white border-mti-gray-platinum",
											)}>
											{!user.subscriptionExpirationDate && "Unlimited"}
											{user.subscriptionExpirationDate && moment(user.subscriptionExpirationDate).format("DD/MM/YYYY")}
										</Link>
									</div>
								</div>
							</div>
						</form>
					</div>
					<div className="flex flex-col gap-6 w-48">
						<div
							className="flex flex-col gap-3 items-center h-fit cursor-pointer group"
							onClick={() => (profilePictureInput.current as any)?.click()}>
							<div className="relative overflow-hidden h-48 w-48 rounded-full">
								<div
									className={clsx(
										"absolute top-0 left-0 bg-mti-purple-light/60 w-full h-full z-20 flex items-center justify-center opacity-0 group-hover:opacity-100",
										"transition ease-in-out duration-300",
									)}>
									<BsCamera className="text-6xl text-mti-purple-ultralight/80" />
								</div>
								<img src={profilePicture} alt={user.name} className="aspect-square drop-shadow-xl self-end object-cover" />
							</div>
							<input type="file" className="hidden" onChange={uploadProfilePicture} accept="image/*" ref={profilePictureInput} />
							<span
								onClick={() => (profilePictureInput.current as any)?.click()}
								className="cursor-pointer text-mti-purple-light text-sm">
								Change picture
							</span>
							<h6 className="font-normal text-base text-mti-gray-taupe">{USER_TYPE_LABELS[user.type]}</h6>
						</div>
						{user.type === "agent" && (
							<div className="flag items-center h-fit">
								<img
									alt={user.demographicInformation?.country.toLowerCase() + "_flag"}
									src={`https://flagcdn.com/w320/${user.demographicInformation?.country.toLowerCase()}.png`}
									width="320"
								/>
							</div>
						)}
					</div>
				</div>
				<div className="flex flex-col gap-4 mt-8 mb-20">
					<span className="text-lg font-bold">Bio</span>
					<textarea
						className="w-full h-full min-h-[148px] cursor-text px-7 py-8 input border-2 border-mti-gray-platinum bg-white rounded-3xl"
						onChange={(e) => setBio(e.target.value)}
						defaultValue={bio}
						placeholder="Write your text here..."
					/>
				</div>

				<div className="self-end flex justify-between w-full gap-8 absolute bottom-8 left-0 px-8">
					<Link href="/" className="max-w-[200px] self-end w-full">
						<Button color="purple" variant="outline" className="max-w-[200px] self-end w-full">
							Back
						</Button>
					</Link>
					<Button color="purple" className="max-w-[200px] self-end w-full" onClick={updateUser} disabled={isLoading}>
						Save Changes
					</Button>
				</div>
			</section>
		</Layout>
	);
}

export default function Home() {
	const {user, mutateUser} = useUser({redirectTo: "/login"});

	return (
		<>
			<Head>
				<title>Profile | EnCoach</title>
				<meta
					name="description"
					content="A training platform for the IELTS exam provided by the Muscat Training Institute and developed by eCrop."
				/>
				<meta name="viewport" content="width=device-width, initial-scale=1" />
				<link rel="icon" href="/favicon.ico" />
			</Head>
			<ToastContainer />
			{user && <UserProfile user={user} mutateUser={mutateUser} />}
		</>
	);
}