"use client";

import {
  createContext,
  type ReactNode,
  useCallback,
  useContext,
  useMemo,
  useState,
} from "react";
import type { PortfolioProjectView } from "@/lib/portfolio-data";
import { SHOWCASE, type ShowcaseConfig } from "@/lib/project-showcase";
import { ProjectLightbox } from "./ProjectLightbox";

export interface ShowcaseItem {
  config: ShowcaseConfig;
  project: PortfolioProjectView;
}

interface ShowcaseApi {
  open(id: string): void;
  items: ShowcaseItem[];
}

const ApiContext = createContext<ShowcaseApi | null>(null);

/** Só aparece como card com vídeo o projeto que existe na lista e tem vídeo gravado. */
export function buildShowcaseItems(
  projects: PortfolioProjectView[],
): ShowcaseItem[] {
  const items: ShowcaseItem[] = [];
  for (const config of SHOWCASE) {
    const project = projects.find((candidate) => candidate.id === config.id);
    if (project) items.push({ config, project });
  }
  return items;
}

/** Itens da vitrine para quem está dentro do provedor. */
export function useShowcaseItems() {
  return useContext(ApiContext)?.items ?? [];
}

/** Abre a janela ampliada de um projeto (nada acontece fora do provedor). */
export function useShowcaseOpen() {
  const api = useContext(ApiContext);
  return useCallback((id: string) => api?.open(id), [api]);
}

/**
 * Guarda os projetos da vitrine e qual deles está ampliado, e mostra a janela ampliada. A vitrine animada
 * (ProjectReel) e a lista do celular (ProjectList) leem a mesma lista de itens.
 */
export function ShowcaseProvider({
  projects,
  children,
}: {
  projects: PortfolioProjectView[];
  children: ReactNode;
}) {
  const items = useMemo(() => buildShowcaseItems(projects), [projects]);
  const [openId, setOpenId] = useState<string | null>(null);

  const api = useMemo<ShowcaseApi>(() => ({ items, open: setOpenId }), [items]);

  const openIndex = openId
    ? items.findIndex((item) => item.config.id === openId)
    : -1;

  return (
    <ApiContext.Provider value={api}>
      {children}
      {openIndex >= 0 && (
        <ProjectLightbox
          items={items}
          index={openIndex}
          onClose={() => setOpenId(null)}
          onNavigate={(index) => setOpenId(items[index]?.config.id ?? null)}
        />
      )}
    </ApiContext.Provider>
  );
}