"use client";

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

import { browserFetch } from "../lib/api";

export type MapHomeMakerListItem = {
  id: string;
  slug: string;
  name: string;
  city: string;
  province: string;
  imageUrl: string;
  distance: string;
  rating: string;
  reviewCount: number;
  satisfaction: string;
  tags: string[];
};

type FavoritesResponse = {
  makers: Array<{ id: string; slug: string }>;
};

function loginForCurrentPage() {
  const currentPath = `${window.location.pathname}${window.location.search}`;
  window.location.assign(`/login?returnTo=${encodeURIComponent(currentPath)}`);
}

export function MapHomeMakerList({ makers }: { makers: MapHomeMakerListItem[] }) {
  const [favoriteSlugs, setFavoriteSlugs] = useState<Set<string>>(new Set());
  const [favoriteIds, setFavoriteIds] = useState<Set<string>>(new Set());
  const [loadingSlug, setLoadingSlug] = useState("");
  const [needsLogin, setNeedsLogin] = useState(false);

  useEffect(() => {
    let active = true;

    async function loadFavorites() {
      try {
        const response = await browserFetch<FavoritesResponse>("/favorites");
        if (!active) {
          return;
        }
        setFavoriteSlugs(new Set(response.makers.map((maker) => maker.slug)));
        setFavoriteIds(new Set(response.makers.map((maker) => maker.id)));
        setNeedsLogin(false);
      } catch (error) {
        const apiError = error as Error & { status?: number };
        if (active && (apiError.status === 401 || apiError.status === 403 || apiError.message.includes("Authentication"))) {
          setNeedsLogin(true);
        }
      }
    }

    void loadFavorites();

    return () => {
      active = false;
    };
  }, []);

  async function toggleFavorite(maker: MapHomeMakerListItem) {
    if (needsLogin) {
      loginForCurrentPage();
      return;
    }

    const isFavorite = favoriteSlugs.has(maker.slug) || favoriteIds.has(maker.id);
    setLoadingSlug(maker.slug);

    try {
      await browserFetch<{ favorited: boolean }>(`/favorites/makers/${encodeURIComponent(maker.slug)}`, {
        method: isFavorite ? "DELETE" : "POST"
      });

      setFavoriteSlugs((current) => {
        const next = new Set(current);
        if (isFavorite) {
          next.delete(maker.slug);
        } else {
          next.add(maker.slug);
        }
        return next;
      });
      setFavoriteIds((current) => {
        const next = new Set(current);
        if (isFavorite) {
          next.delete(maker.id);
        } else {
          next.add(maker.id);
        }
        return next;
      });
    } catch (error) {
      const apiError = error as Error & { status?: number };
      if (apiError.status === 401 || apiError.status === 403 || apiError.message.includes("Authentication")) {
        loginForCurrentPage();
      }
    } finally {
      setLoadingSlug("");
    }
  }

  if (makers.length === 0) {
    return (
      <div className="empty-state">
        No encontramos makers con esa busqueda. Prueba otra categoria o abre la vista completa de descubrir.
      </div>
    );
  }

  return (
    <div className="map-home-maker-list">
      {makers.map((maker) => {
        const isFavorite = favoriteSlugs.has(maker.slug) || favoriteIds.has(maker.id);
        return (
          <article key={maker.id} className="map-home-maker-card">
            <Link
              href={`/makers/${maker.slug}`}
              className="map-home-maker-card-main map-home-maker-card-link"
              aria-label={`Abrir perfil de ${maker.name}`}
            >
              <div className="map-home-maker-media">
                <img className="thumb" src={maker.imageUrl} alt={maker.name} />
                <span className="map-home-distance-pill">{maker.distance}</span>
              </div>
              <div className="map-home-maker-body">
                <div className="map-home-maker-topline">
                  <div className="map-home-maker-brand">
                    <span className="map-home-maker-badge">{maker.name.slice(0, 2).toUpperCase()}</span>
                    <div className="map-home-maker-copy">
                      <div className="map-home-maker-heading">
                        <strong>{maker.name}</strong>
                        <span className="map-home-online-dot" />
                      </div>
                      <span className="map-home-maker-subline">{maker.city}, {maker.province}</span>
                    </div>
                  </div>
                </div>

                <div className="map-home-maker-score">
                  <span className="map-home-star">*</span>
                  <span>{maker.rating} ({maker.reviewCount})</span>
                  <span>|</span>
                  <span>{maker.satisfaction}</span>
                </div>

                <div className="map-home-tag-row">
                  {maker.tags.map((tag) => (
                    <span key={`${maker.id}-${tag}`} className="map-home-tag">{tag}</span>
                  ))}
                </div>
              </div>
            </Link>
            <button
              className={`map-home-bookmark ${isFavorite ? "is-active" : ""}`}
              type="button"
              aria-label={isFavorite ? `Quitar ${maker.name} de favoritos` : `Guardar ${maker.name} en favoritos`}
              aria-pressed={isFavorite}
              disabled={loadingSlug === maker.slug}
              onClick={() => void toggleFavorite(maker)}
            >
              <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.8" strokeLinecap="round" strokeLinejoin="round">
                <path d="M7 4.5h10a1 1 0 0 1 1 1V20l-6-3.2L6 20V5.5a1 1 0 0 1 1-1Z" />
              </svg>
            </button>
          </article>
        );
      })}
    </div>
  );
}