Vault/hooks/useVideo.ts

'use client';
import { useEffect, useState } from 'react';

type Video = any;

export function useVideo(id?: string) {
  const [video, setVideo] = useState<Video | null>(null);
  const [next, setNext] = useState<Video | null>(null);
  const [isLoading, setIsLoading] = useState<boolean>(!!id);
  const [error, setError] = useState<any>(null);

  useEffect(() => {
    if (!id) {
      setVideo(null);
      setNext(null);
      setIsLoading(false);
      setError(null);
      return;
    }

    let cancelled = false;
    setIsLoading(true);
    setError(null);

    fetch(`/api/videos/${id}`)
      .then(async (res) => {
        if (!res.ok) {
          // The server explains refusals (e.g. which video to finish first).
          const body = await res.json().catch(() => null);
          throw new Error(body?.error ?? `HTTP ${res.status}`);
        }
        const json = await res.json();
        if (!cancelled) {
          setVideo(json.video ?? null);
          setNext(json.next ?? null);
        }
      })
      .catch((err) => {
        if (!cancelled) {
          // Never leave the previous video on screen under a new address.
          setVideo(null);
          setNext(null);
          setError(err);
        }
      })
      .finally(() => {
        if (!cancelled) setIsLoading(false);
      });

    return () => {
      cancelled = true;
    };
  }, [id]);

  return { video, next, isLoading, error };
}