// app/buying-guide/product/[id]/page.tsx
import Link from "next/link";
import ReactMarkdown from "react-markdown";

const API_URL = process.env.NEXT_PUBLIC_API_BASE_URL;
const ASSET_URL = process.env.NEXT_PUBLIC_ASSET_URL;

async function getEntry(id: string) {
    const res = await fetch(
        `${API_URL}/items/bg_entries/${id}?fields=*,links.id,links.text,links.url,links.target,scores.id,scores.cat,scores.value,scores.body,header.id,date_updated`,
        {
            cache: "no-store",
        }
    );

    if (!res.ok) {
        const error = await res.text();
        console.error(`Failed to fetch entry: ${error}`);
        throw new Error(`Error fetching entry ${id}`);
    }

    const { data } = await res.json();
    return data;
}

export default async function ProductDetail({
    params,
}: {
    params: Promise<{ id: string }>;
}) {
    const id = (await params).id;
    const entry = await getEntry(id);

    const avgScore =
    entry?.scores?.length > 0
    ? (
        entry.scores.reduce((sum: number, s: any) => sum + Number(s.value), 0) /
        entry.scores.length
    ).toFixed(1)
    : "N/A";

    const headerUrl = entry.header?.id
    ? `${ASSET_URL}/assets/${entry.header.id}?cache-buster=${entry.date_updated}&key=system-large-contain`
    : null;

    return (
        <div className="max-w-4xl mx-auto px-4 py-8 space-y-6">
        {/* Header Banner */}
        {headerUrl && (
            <div className="w-full h-64 relative overflow-hidden rounded-xl shadow">
            <img
            src={headerUrl}
            alt="Header Image"
            className="object-cover w-full h-full rounded-xl"
            />
            </div>
        )}

        {/* Title */}
        <div className="flex justify-between items-start">
        <div>
        <h2 className="text-xl font-semibold text-white">{entry.product_make}</h2>
        <h1 className="text-4xl font-bold text-yellow-500 mt-2">{entry.product_model}</h1>
        </div>
        <div className="text-right">
        {entry.product_price && (
            <p className="text-lg text-white font-medium mt-1">
            {entry.product_price.startsWith("Starting at") ? entry.product_price : `Starting at ${entry.product_price}`}
            </p>
        )}
        <Link
        href="/buying-guide"
        className="text-sm text-blue-500 underline mt-2 inline-block"
        >
        ← Back to Buying Guide
        </Link>
        </div>
        </div>

        {/* Links & Score Summary */}
        {(Array.isArray(entry.links) || Array.isArray(entry.scores)) && (
            <div className="flex flex-col md:flex-row gap-8">
            {Array.isArray(entry.links) && entry.links.length > 0 && (
                <div className="md:w-1/2">
                <h3 className="text-xl font-semibold mb-2">Links</h3>
                <ul className="list-disc ml-6 space-y-1">
                {entry.links.map((link: any, idx: number) => (
                    <li key={idx}>
                    <a
                    href={link.url}
                    target="_blank"
                    rel="noopener noreferrer"
                    className="text-blue-700 underline"
                    >
                    {link.text || link.url}
                    </a>
                    {link.target && (
                        <span className="text-sm text-gray-500"> ({link.target})</span>
                    )}
                    </li>
                ))}
                </ul>
                </div>
            )}

            {(Array.isArray(entry.scores) && entry.scores.length > 0) && (
                <div className="md:w-1/2">
                <h3 className="text-xl font-semibold mb-2">Score Summary</h3>
                <ul className="space-y-1">
                {entry.scores.map((s: any, idx: number) => (
                    <li key={idx} className="flex justify-between">
                    <span>{s.cat}</span>
                    <span className="font-semibold">{s.value}/10</span>
                    </li>
                ))}
                </ul>
                <p className="mt-2 font-bold text-right">Total: {avgScore}</p>
                </div>
            )}
            </div>
        )}

        {/* Overview */}
        {entry.review_overview_text && (
            <div className="prose max-w-none">
            <h3 className="text-xl font-semibold mb-2">Overview</h3>
            <ReactMarkdown>{entry.review_overview_text}</ReactMarkdown>
            </div>
        )}

        {/* Intro */}
        {entry.review_intro_text && (
            <div className="prose max-w-none">
            <h3 className="text-xl font-semibold mb-2">{`${entry.product_make}, ${entry.product_model} Review by ${entry.author}`}</h3>
            <ReactMarkdown>{entry.review_intro_text}</ReactMarkdown>
            </div>
        )}

        {/* Detailed Scores */}
        {(Array.isArray(entry.scores) && entry.scores.length > 0) && (
            <div className="space-y-4">
            {entry.scores.map((s: any, idx: number) => (
                <div key={idx} className="p-4 rounded border">
                <p className="text-xl font-semibold">
                {s.cat} – <span className="text-blue-600">{s.value}/10</span>
                </p>
                <div className="text-sm text-gray-400">
                <ReactMarkdown>{s.body}</ReactMarkdown>
                </div>
                </div>
            ))}
            </div>
        )}

        {/* Recommendation */}
        {entry.rec_text && (
            <div className="prose max-w-none">
            <h3 className="text-xl font-semibold mb-2">Recommendation</h3>
            <ReactMarkdown>{entry.rec_text}</ReactMarkdown>
            </div>
        )}

        {/* Updates */}
        {entry.updates && (
            <div className="prose max-w-none">
            <h3 className="text-xl font-semibold mb-2">Updates</h3>
            <ReactMarkdown>{entry.updates}</ReactMarkdown>
            </div>
        )}

        {/* Video */}
        {entry.video_review_url && (
            <div>
            <h3 className="text-xl font-semibold mb-2">Video Review</h3>
            <div className="aspect-w-16 aspect-h-9">
            <iframe
            src={entry.video_review_url.replace("watch?v=", "embed/")}
            className="w-full h-96 rounded"
            frameBorder="0"
            allowFullScreen
            />
            </div>
            </div>
        )}
        </div>
    );
}