import { useCallback, useEffect, useState } from "react";
import { useLocation, useSearch } from "wouter";
import type { components } from "../api/generated";
import { api } from "../services/api-client";

type Feed = components["schemas"]["Feed"];

interface Props {
	basePath: string;
}

export function FeedSidebar({ basePath }: Props) {
	const search = useSearch();
	const [, setLocation] = useLocation();
	const params = new URLSearchParams(search);
	const selectedFeedId = params.get("feed");

	const [feeds, setFeeds] = useState<Feed[]>([]);
	const [fetching, setFetching] = useState(true);

	const fetchFeeds = useCallback(async () => {
		setFetching(true);
		const { data } = await api.GET("/api/feeds");
		if (data) {
			setFeeds(data);
		}
		setFetching(false);
	}, []);

	useEffect(() => {
		fetchFeeds();
	}, [fetchFeeds]);

	const handleSelect = (feedId: string | null) => {
		if (feedId) {
			setLocation(`${basePath}?feed=${feedId}`);
		} else {
			setLocation(basePath);
		}
	};

	return (
		<nav className="w-56 shrink-0">
			<h2 className="mb-3 text-xs font-semibold uppercase tracking-wide text-stone-400">
				Feeds
			</h2>
			<ul className="space-y-0.5">
				<li>
					<button
						type="button"
						onClick={() => handleSelect(null)}
						className={`w-full rounded-md px-3 py-1.5 text-left text-sm transition-colors ${
							!selectedFeedId
								? "bg-stone-200 font-medium text-stone-900"
								: "text-stone-600 hover:bg-stone-100"
						}`}
					>
						All feeds
					</button>
				</li>
				{fetching && (
					<li className="px-3 py-1.5 text-xs text-stone-400">Loading...</li>
				)}
				{feeds.map((feed) => (
					<li key={feed.id}>
						<button
							type="button"
							onClick={() => handleSelect(feed.id)}
							className={`flex w-full items-center justify-between rounded-md px-3 py-1.5 text-left text-sm transition-colors ${
								selectedFeedId === feed.id
									? "bg-stone-200 font-medium text-stone-900"
									: "text-stone-600 hover:bg-stone-100"
							}`}
						>
							<span className="min-w-0 truncate">{feed.title}</span>
							{feed.unreadCount > 0 && (
								<span className="ml-2 shrink-0 rounded-full bg-sky-100 px-1.5 py-0.5 text-xs font-medium text-sky-700">
									{feed.unreadCount}
								</span>
							)}
						</button>
					</li>
				))}
			</ul>
		</nav>
	);
}