"use client";

import { useEffect, useMemo, useState } from "react";
import Link from "next/link";
import { useI18n } from "./components/I18nProvider";

type LatestListing = {
  id: string;
  title: string;
  slug: string;
  teaser: string | null;
  coverImage: string | null;
  city: string;
  region: string;
  isSample: boolean;
  priceWeekdayEuros: number | null;
  priceWeekendEuros: number | null;
};

export const dynamic = "force-dynamic";

export default function HomePage() {
  const { t } = useI18n();
  const [latest, setLatest] = useState<LatestListing[]>([]);
  const [activeIndex, setActiveIndex] = useState(0);
  const [loadingLatest, setLoadingLatest] = useState(false);
  const [paused, setPaused] = useState(false);

  useEffect(() => {
    setLoadingLatest(true);
    fetch("/api/listings?limit=8", { cache: "no-store" })
      .then((res) => res.json())
      .then((data) => setLatest((data.listings ?? []).slice(0, 5)))
      .catch(() => setLatest([]))
      .finally(() => setLoadingLatest(false));
  }, []);

  useEffect(() => {
    if (!latest.length || paused) return;
    const id = setInterval(() => {
      setActiveIndex((prev) => (prev + 1) % latest.length);
    }, 4200);
    return () => clearInterval(id);
  }, [latest, paused]);

  useEffect(() => {
    if (activeIndex >= latest.length) {
      setActiveIndex(0);
    }
  }, [activeIndex, latest.length]);

  const activeListing = useMemo(() => {
    if (!latest.length) return null;
    return latest[Math.min(activeIndex, latest.length - 1)];
  }, [latest, activeIndex]);

  return (
    <main>
      <section className="hero">
        <span className="eyebrow">{t("heroEyebrow")}</span>
        <h1>{t("heroTitle")}</h1>
        <p>{t("heroBody")}</p>
      </section>

      <section className="panel latest-panel">
        <div
          style={{
            display: "flex",
            justifyContent: "space-between",
            alignItems: "center",
            gap: 10,
          }}
        >
          <div>
            <h2 style={{ margin: 0 }}>{t("latestListingsTitle")}</h2>
            <p style={{ marginTop: 4 }}>{t("latestListingsLead")}</p>
          </div>
          <Link className="button secondary" href="/listings">
            {t("ctaBrowse")}
          </Link>
        </div>
        {loadingLatest ? (
          <p style={{ color: "#cbd5e1", marginTop: 10 }}>{t("loading")}</p>
        ) : !activeListing ? (
          <p style={{ color: "#cbd5e1", marginTop: 10 }}>{t("mapNoResults")}</p>
        ) : (
          <div
            className="latest-carousel"
            onMouseEnter={() => setPaused(true)}
            onMouseLeave={() => setPaused(false)}
          >
            <div className="carousel-window">
              <div
                className="carousel-track"
                style={{ transform: `translateX(-${activeIndex * 100}%)` }}
              >
                {latest.map((item) => (
                  <article key={item.id} className="carousel-slide">
                    {item.coverImage ? (
                      <a
                        href={`/listings/${item.slug}`}
                        className="latest-cover-link"
                        aria-label={item.title}
                      >
                        <img
                          src={item.coverImage}
                          alt={item.title}
                          className="latest-cover"
                        />
                      </a>
                    ) : (
                      <a
                        href={`/listings/${item.slug}`}
                        className="latest-cover-link"
                        aria-label={item.title}
                      >
                        <div className="latest-cover placeholder" />
                      </a>
                    )}
                    <div className="latest-meta">
                      <div
                        style={{ display: "flex", gap: 6, flexWrap: "wrap" }}
                      >
                        <span className="badge">
                          {item.city}, {item.region}
                        </span>
                        {item.isSample ? (
                          <span className="badge warning">
                            {t("sampleBadge")}
                          </span>
                        ) : null}
                      </div>
                      <h3 style={{ margin: "6px 0 4px" }}>{item.title}</h3>
                      <p style={{ margin: 0 }}>{item.teaser}</p>
                      {item.priceWeekdayEuros || item.priceWeekendEuros ? (
                        <div
                          style={{
                            color: "#cbd5e1",
                            fontSize: 14,
                            marginTop: 2,
                          }}
                        >
                          {t("priceStartingFromShort", {
                            price: Math.min(
                              ...[
                                item.priceWeekdayEuros,
                                item.priceWeekendEuros,
                              ].filter(
                                (p): p is number => typeof p === "number",
                              ),
                            ),
                          })}
                        </div>
                      ) : null}
                      <div
                        style={{
                          display: "flex",
                          gap: 8,
                          marginTop: 10,
                          flexWrap: "wrap",
                        }}
                      >
                        <Link
                          className="button secondary"
                          href={`/listings/${item.slug}`}
                        >
                          {t("openListing")}
                        </Link>
                      </div>
                    </div>
                  </article>
                ))}
              </div>
            </div>
            <div className="dot-row">
              {latest.map((_, idx) => (
                <span
                  key={idx}
                  className={`dot ${idx === activeIndex ? "active" : ""}`}
                  onClick={() => setActiveIndex(idx)}
                />
              ))}
            </div>
          </div>
        )}
      </section>
    </main>
  );
}