"use client";

import { type RefObject, useEffect, useRef } from "react";
import { ContentService } from "@/services/content.service";

interface ViewCounterProps {
	contentId: string;
	videoRef?: RefObject<HTMLVideoElement | null>;
}

export function ViewCounter({ contentId, videoRef }: ViewCounterProps) {
	const hasIncremented = useRef(false);
	const containerRef = useRef<HTMLDivElement>(null);

	useEffect(() => {
		const increment = () => {
			if (!hasIncremented.current) {
				ContentService.incrementViews(contentId).catch((err) => {
					console.error("Failed to increment views:", err);
				});
				hasIncremented.current = true;
			}
		};

		// 1. Observer pour la visibilité (IntersectionObserver)
		const observer = new IntersectionObserver(
			(entries) => {
				const entry = entries[0];
				if (entry.isIntersecting) {
					// Si c'est une image (pas de videoRef), on attend 3 secondes
					if (!videoRef) {
						const timer = setTimeout(() => {
							increment();
						}, 3000);
						return () => clearTimeout(timer);
					}
				}
			},
			{ threshold: 0.5 },
		);

		if (containerRef.current) {
			observer.observe(containerRef.current);
		}

		// 2. Logique pour la vidéo (> 50%)
		let videoElement: HTMLVideoElement | null = null;
		const handleTimeUpdate = () => {
			if (videoElement && videoElement.duration > 0) {
				const progress = videoElement.currentTime / videoElement.duration;
				if (progress >= 0.5) {
					increment();
					videoElement.removeEventListener("timeupdate", handleTimeUpdate);
				}
			}
		};

		if (videoRef?.current) {
			videoElement = videoRef.current;
			videoElement.addEventListener("timeupdate", handleTimeUpdate);
		}

		return () => {
			observer.disconnect();
			if (videoElement) {
				videoElement.removeEventListener("timeupdate", handleTimeUpdate);
			}
		};
	}, [contentId, videoRef]);

	return (
		<div ref={containerRef} className="absolute inset-0 pointer-events-none" />
	);
}