"use client";

import { useEffect, useRef } from "react";
import Link from "next/link";

import FavoriteToggle from "./FavoriteToggle";

type PublicMaker = {
  id: string;
  slug: string;
  business_name: string;
};

type PublicWork = {
  id: string;
  slug: string;
  title: string;
  summary: string;
  technology: string;
  material: string;
  image_url: string | null;
  gallery_urls: string[] | null;
  maker_id: string;
  maker_slug: string;
  maker_name: string;
  avg_rating: number | string;
  review_count: number;
};

type DiscoverCategory = "all" | "fdm" | "resin" | "design-3d" | "repuestos" | "ingenieria";

const discoverReturnKey = "makers3d:discover:return-position";

function getRating(value: number | string) {
  const parsed = typeof value === "number" ? value : Number(value);
  return Number.isFinite(parsed) ? parsed : 0;
}

function workImages(work: PublicWork) {
  const images = [work.image_url, ...(work.gallery_urls || [])]
    .filter((image): image is string => Boolean(image));
  return Array.from(new Set(images)).slice(0, 8);
}

function getWorkTags(work: PublicWork) {
  return [work.technology, work.material].filter(Boolean).slice(0, 3);
}

function matchesCategory(work: PublicWork, category: DiscoverCategory) {
  if (category === "all") {
    return true;
  }

  const haystack = [work.title, work.summary, work.technology, work.material, work.maker_name]
    .join(" ")
    .normalize("NFD")
    .replace(/[\u0300-\u036f]/g, "")
    .toLowerCase();

  if (category === "fdm") {
    return haystack.includes("fdm");
  }
  if (category === "resin") {
    return haystack.includes("resina") || haystack.includes("resin");
  }
  if (category === "design-3d") {
    return haystack.includes("diseno") || haystack.includes("diseño") || haystack.includes("cad");
  }
  if (category === "repuestos") {
    return haystack.includes("repuesto") || haystack.includes("restauracion") || haystack.includes("pieza");
  }

  return haystack.includes("ingenieria") || haystack.includes("industrial") || haystack.includes("tecnic");
}

function orderWorks(works: PublicWork[]) {
  return [...works].sort((left, right) => {
    if (getRating(right.avg_rating) !== getRating(left.avg_rating)) {
      return getRating(right.avg_rating) - getRating(left.avg_rating);
    }

    return right.review_count - left.review_count;
  });
}

function SearchIcon() {
  return (
    <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.8" strokeLinecap="round" strokeLinejoin="round">
      <circle cx="11" cy="11" r="6.6" />
      <path d="m20 20-3.6-3.6" />
    </svg>
  );
}

export default function DiscoverExperienceClient({
  initialWorks,
  initialQuery,
  initialCategory
}: {
  initialMakers: PublicMaker[];
  initialWorks: PublicWork[];
  initialQuery: string;
  initialCategory: DiscoverCategory;
}) {
  const scrollRef = useRef<HTMLDivElement>(null);
  const works = orderWorks(initialWorks.filter((work) => matchesCategory(work, initialCategory)));

  useEffect(() => {
    const storedPosition = window.sessionStorage.getItem(discoverReturnKey);
    if (!storedPosition) {
      return;
    }

    try {
      const position = JSON.parse(storedPosition) as {
        scrollTop?: number;
        query?: string;
        category?: DiscoverCategory;
      };

      if (position.query !== initialQuery || position.category !== initialCategory) {
        return;
      }

      const restore = () => {
        scrollRef.current?.scrollTo({ top: position.scrollTop || 0, behavior: "auto" });
      };

      requestAnimationFrame(restore);
      window.setTimeout(restore, 120);
    } catch {
      window.sessionStorage.removeItem(discoverReturnKey);
    }
  }, [initialCategory, initialQuery, works.length]);

  function rememberReturnPosition(workId: string) {
    window.sessionStorage.setItem(
      discoverReturnKey,
      JSON.stringify({
        category: initialCategory,
        query: initialQuery,
        scrollTop: scrollRef.current?.scrollTop || 0,
        workId
      })
    );
  }

  return (
    <section className="discover-feed-shell">
      <div className="discover-feed-topbar">
        <form action="/discover" className="discover-feed-search">
          {initialCategory !== "all" ? <input type="hidden" name="category" value={initialCategory} /> : null}
          <span aria-hidden="true">
            <SearchIcon />
          </span>
          <input name="q" placeholder="Buscar trabajos, piezas, materiales..." defaultValue={initialQuery} />
        </form>
      </div>

      <div ref={scrollRef} className="discover-feed-scroll" aria-label="Feed de trabajos">
        {works.map((work, index) => {
          const images = workImages(work);

          return (
            <article key={work.id} className="discover-feed-item">
              <section className="discover-feed-visual">
                <div className="discover-feed-gallery" aria-label={`Galeria de ${work.title}`}>
                  {images.map((image, imageIndex) => (
                    <div key={`${work.id}-${image}`} className="discover-feed-slide">
                      <img src={image} alt={`${work.title} - imagen ${imageIndex + 1}`} />
                    </div>
                  ))}
                </div>

                {images.length > 1 ? (
                  <div className="discover-feed-dots" aria-hidden="true">
                    {images.map((image) => (
                      <span key={`${work.id}-dot-${image}`} />
                    ))}
                  </div>
                ) : null}

                <span className="discover-feed-photo-count">{images.length === 1 ? "1 foto" : `${images.length} fotos | desliza`}</span>

                <div className="discover-feed-actions" aria-label="Acciones del trabajo">
                  <FavoriteToggle targetType="work" targetId={work.id} compact />
                  <Link
                    href={`/works/${work.slug}`}
                    className="discover-feed-action-button"
                    onClick={() => rememberReturnPosition(work.id)}
                    aria-label="Ver trabajo completo"
                  >
                    <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.8" strokeLinecap="round" strokeLinejoin="round">
                      <path d="M7 17 17 7" />
                      <path d="M8 7h9v9" />
                    </svg>
                  </Link>
                </div>

              </section>

              <section className="discover-feed-copy">
                <div className="discover-feed-maker-row">
                  <Link href={`/makers/${work.maker_slug}`} className="discover-feed-maker">
                    <span>{work.maker_name.slice(0, 2).toUpperCase()}</span>
                    <strong>{work.maker_name}</strong>
                  </Link>
                  <div className="discover-feed-rating">
                    <span className="map-home-star">*</span>
                    <span>{getRating(work.avg_rating).toFixed(1)}</span>
                    <span>({Math.max(work.review_count * 32, 12)})</span>
                  </div>
                </div>

                <div className="discover-feed-title-row">
                  <h1>{work.title}</h1>
                  <Link
                    href={`/works/${work.slug}`}
                    className="button button-primary discover-feed-cta"
                    onClick={() => rememberReturnPosition(work.id)}
                  >
                    Ver trabajo
                  </Link>
                </div>

                <p>{work.summary}</p>

                <div className="discover-feed-tags">
                  {getWorkTags(work).map((tag) => (
                    <span key={`${work.id}-${tag}`} className="map-home-tag">{tag}</span>
                  ))}
                </div>
              </section>
            </article>
          );
        })}

        {works.length === 0 ? (
          <section className="discover-feed-empty">
            <span className="eyebrow">Descubrir</span>
            <h1>No encontramos trabajos</h1>
            <p>Prueba otra busqueda para volver a explorar el portfolio de makers.</p>
            <Link href="/discover" className="button button-primary">Ver todos</Link>
          </section>
        ) : null}
      </div>
    </section>
  );
}