import React, { useEffect, useState, useRef } from "react";
import { SidebarIcon } from "lucide-react";
import { useNavigate } from "react-router-dom";
import { useAuth } from "../../context/AuthContext";
import { useSidebar } from "../../context/SidebarContext";
import { ToggleButton } from "../Input/Button";
import { getCategoryThumbnail } from "../../utils/thumbnailUtils";

interface Streamer {
	user_id: number;
	username: string;
}

interface Category {
	category_id: number;
	category_name: string;
}

interface SideBarProps {
	extraClasses?: string;
}

const Sidebar: React.FC<SideBarProps> = ({ extraClasses = "" }) => {
	const { showSideBar, setShowSideBar } = useSidebar();
	const navigate = useNavigate();
	const { username, isLoggedIn } = useAuth();
	const [followedStreamers, setFollowedStreamers] = useState<Streamer[]>([]);
	const [followedCategories, setFollowedCategories] = useState<Category[]>([]);
	const [justToggled, setJustToggled] = useState(false);
	const sidebarId = useRef(Math.floor(Math.random() * 1000000));

	// Fetch followed streamers & categories
	useEffect(() => {
		if (!isLoggedIn) return;

		const fetchFollowData = async () => {
			try {
				const response = await fetch("/api/user/following");
				if (!response.ok) throw new Error("Failed to fetch followed content");
				const data = await response.json();
				setFollowedStreamers(data.streams);
				setFollowedCategories(data.categories);
			} catch (error) {
				console.error("Error fetching followed content:", error);
			}
		};

		fetchFollowData();
	}, [isLoggedIn]);

	const handleSideBar = () => {
		setShowSideBar(!showSideBar);
		setJustToggled(true);
		setTimeout(() => setJustToggled(false), 200);
	};

	// Keyboard shortcut to toggle sidebar
	useEffect(() => {
		const handleKeyPress = (e: KeyboardEvent) => {
			if (e.key === "s" && document.activeElement == document.body && isLoggedIn) handleSideBar();
		};

		document.addEventListener("keydown", handleKeyPress);

		return () => {
			document.removeEventListener("keydown", handleKeyPress);
		};
	}, [showSideBar, setShowSideBar, isLoggedIn]);

	return (
		<>
			<ToggleButton
				onClick={() => handleSideBar()}
				extraClasses={`absolute group text-[1rem] top-[9vh] ${
					showSideBar ? "left-[16vw] duration-[0.5s]" : "left-[20px] duration-[1s]"
				} ease-in-out cursor-pointer z-[50]`}
				toggled={showSideBar}
			>
				<SidebarIcon className="h-[2vw] w-[2vw]" />

				{!showSideBar && !justToggled && (
					<small className="absolute flex items-center top-0 ml-2 left-0 h-full my-auto w-fit text-nowrap font-bold my-auto group-hover:left-full opacity-0 group-hover:opacity-100 group-hover:bg-black/30 p-1 rounded-md text-white transition-all">
						Press S
					</small>
				)}
			</ToggleButton>
			<div
				id={`sidebar-${sidebarId.current}`}
				className={`fixed top-0 left-0 w-[15vw] h-screen overflow-x-hidden flex flex-col bg-[var(--sideBar-bg)] text-[var(--sideBar-text)] text-center overflow-y-auto scrollbar-hide
        transition-all duration-500 ease-in-out ${showSideBar ? "translate-x-0" : "-translate-x-full"} z-50 ${extraClasses}`}
			>
				{/* Profile Info */}
				<div className="flex flex-row items-center border-b-4 border-[var(--profile-border)] justify-evenly bg-[var(--sideBar-profile-bg)] py-[1em]">
					<img
						src={`/user/${username}/profile_picture`}
						onError={(e) => {
							e.currentTarget.src = "/images/pfps/default.png";
							e.currentTarget.onerror = null;
						}}
						alt="profile picture"
						className="w-[3em] h-[3em] rounded-full border-[0.15em] border-purple-500 cursor-pointer"
						onClick={() => navigate(`/user/${username}`)}
					/>
					<div className="text-center flex flex-col items-center justify-center">
						<h5 className="font-thin text-[0.85rem] cursor-default text-[var(--sideBar-profile-text)]">Logged in as</h5>
						<button className="font-black text-[1.4rem] hover:underline" onClick={() => navigate(`/user/${username}`)}>
							<div className="text-[var(--sideBar-profile-text)]">{username}</div>
						</button>
					</div>
				</div>

				<div id="following" className="flex flex-col flex-grow justify-evenly p-4 gap-4">
					<div
						className="bg-[var(--follow-bg)] rounded-[1em] hover:scale-105 transition-all ease-in-out duration-300"
						onMouseEnter={(e) => (e.currentTarget.style.boxShadow = "var(--follow-shadow)")}
						onMouseLeave={(e) => (e.currentTarget.style.boxShadow = "none")}
					>
						<h1 className="text-[2vw] font-bold text-2xl p-[0.75rem] cursor-default">Following</h1>
					</div>
					<div id="streamers-followed" className="flex flex-col flex-grow items-center">
						<h2 className="border-b-4 border-t-4 w-[125%] text-2xl cursor-default">Streamers</h2>
						<div className="flex flex-col flex-grow justify-evenly w-full">
							{followedStreamers.map((streamer) => (
								<button
									key={`${sidebarId.current}-streamer-${streamer.username}`}
									className="cursor-pointer bg-black w-full py-2 border border-[--text-color] rounded-lg text-white hover:text-purple-500 font-bold transition-colors"
									onClick={() => navigate(`/user/${streamer.username}`)}
								>
									{streamer.username}
								</button>
							))}
						</div>
					</div>

					<div id="categories-followed" className="flex flex-col flex-grow items-center">
						<h2 className="border-b-4 border-t-4 w-[125%] text-2xl cursor-default">Categories</h2>

						{/* Followed Categories */}
						<div id="categories-followed" className="grid grid-cols-1 gap-4 p-4 w-full">
							{followedCategories.map((category) => {
								return (
									<div
										key={`${sidebarId.current}-category-${category.category_id}`}
										className="group relative flex flex-col items-center justify-center h-full max-h-[50px] border border-[--text-color]
                     rounded-lg overflow-hidden hover:shadow-lg transition-all text-white hover:text-purple-500 cursor-pointer"
										onClick={() => (window.location.href = `/category/${category.category_name}`)}
									>
										<img
											src={getCategoryThumbnail(category.category_name)}
											alt={category.category_name}
											className="w-full h-28 object-cover group-hover:blur-[3px] transition-all"
										/>
										<div className="absolute bottom-2 bg-black bg-opacity-60 font-bold w-full text-center py-1">
											{category.category_name}
										</div>
									</div>
								);
							})}
						</div>
					</div>
				</div>
			</div>
		</>
	);
};

export default Sidebar;