import { useEffect, useState } from "react";
import { useParams } from "react-router-dom";
import VideoPlayer from "../components/VideoPlayer";
import VideoSidebar from "../components/VideoSidebar";
import { fetchVideo, formatRunTime } from "../api/client";
import type { VideoDetail } from "../types/video";

function getMapDisplayName(mapName: string): string {
    return mapName.replace(/_/g, " ").toUpperCase();
}

function getMomUrl(mapName: string): string {
    return `https://dashboard.momentum-mod.org/maps/${mapName}`;
}

function SkeletonBlock({ className }: { className?: string }) {
    return (
        <div
            className={`rounded bg-white/5 animate-pulse ${className ?? ""}`}
        />
    );
}

function PageSkeleton() {
    return (
        <div className="py-6">
            <div className="flex items-baseline gap-3 mb-3">
                <SkeletonBlock className="h-8 w-64" />
            </div>
            <div className="flex flex-col lg:flex-row gap-4 lg:items-start">
                <div className="lg:w-1/2 min-w-0">
                    <SkeletonBlock className="aspect-video w-full rounded-lg" />
                </div>
                <div className="lg:w-1/2 flex flex-col gap-4">
                    <div className="rounded border border-white/5 bg-white/5 p-4">
                        <div className="grid grid-cols-2 gap-x-4 gap-y-3">
                            <div>
                                <SkeletonBlock className="h-2.5 w-8 mb-1.5" />
                                <SkeletonBlock className="h-4 w-28" />
                            </div>
                            <div>
                                <SkeletonBlock className="h-2.5 w-8 mb-1.5" />
                                <SkeletonBlock className="h-4 w-20" />
                            </div>
                            <div>
                                <SkeletonBlock className="h-2.5 w-10 mb-1.5" />
                                <SkeletonBlock className="h-4 w-24" />
                            </div>
                            <div>
                                <SkeletonBlock className="h-2.5 w-8 mb-1.5" />
                                <SkeletonBlock className="h-7 w-16" />
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    );
}

export default function VideoDetail() {
    const { id } = useParams<{ id: string }>();
    const [video, setVideo] = useState<VideoDetail | null>(null);
    const [error, setError] = useState<string | null>(null);

    useEffect(() => {
        if (!id) return;
        fetchVideo(id)
            .then(setVideo)
            .catch((err) => setError(err.message));
    }, [id]);

    if (error) {
        return (
            <div className="py-24 text-center">
                <p className="text-red-400/60 mb-4">{error}</p>
            </div>
        );
    }

    if (!video) {
        return <PageSkeleton />;
    }

    return (
        <div className="py-6">
            <div className="rounded-lg border border-white/5 bg-white/5 px-4 py-2 inline-block mb-3">
                <h1 className="text-2xl font-bold tracking-tight text-white/90">
                    <a
                        href={getMomUrl(video.mapName)}
                        target="_blank"
                        rel="noopener noreferrer"
                        className="no-underline text-white/90 hover:text-mom-accent transition-colors"
                    >
                        {getMapDisplayName(video.mapName)}
                    </a>
                </h1>
            </div>

            <div className="flex flex-col lg:flex-row gap-4 lg:items-start">
                <div className="lg:w-1/2 min-w-0">
                    <VideoPlayer video={video} />
                </div>
                <div className="lg:w-1/2">
                    <VideoSidebar video={video} />
                    {video.previousPbs && video.previousPbs.length > 0 && (
                        <div className="rounded border border-white/5 bg-white/5 p-4 mt-4">
                            <div className="text-[10px] uppercase tracking-wider text-gray-500 mb-2">
                                Previous PBs
                            </div>
                            <ul className="space-y-1">
                                {video.previousPbs.map((pb) => (
                                    <li
                                        key={pb.createdAt}
                                        className="text-sm text-white/60"
                                    >
                                        <span className="font-mono text-white/90">
                                            {formatRunTime(pb.runTime)}
                                        </span>
                                        {" · "}
                                        {new Date(
                                            pb.createdAt,
                                        ).toLocaleDateString()}
                                    </li>
                                ))}
                            </ul>
                        </div>
                    )}
                </div>
            </div>
        </div>
    );
}