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path: root/apps/web/src/components/editor/snap-indicator.tsx
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"use client";

import { SnapPoint } from "@/hooks/use-timeline-snapping";
import { TIMELINE_CONSTANTS } from "@/constants/timeline-constants";
import type { TimelineTrack } from "@/types/timeline";

interface SnapIndicatorProps {
	snapPoint: SnapPoint | null;
	zoomLevel: number;
	isVisible: boolean;
	tracks: TimelineTrack[];
	timelineRef: React.RefObject<HTMLDivElement>;
	trackLabelsRef?: React.RefObject<HTMLDivElement>;
}

export function SnapIndicator({
	snapPoint,
	zoomLevel,
	isVisible,
	tracks,
	timelineRef,
	trackLabelsRef,
}: SnapIndicatorProps) {
	if (!isVisible || !snapPoint) {
		return null;
	}

	const timelineContainerHeight = timelineRef.current?.offsetHeight || 400;
	const totalHeight = timelineContainerHeight - 8; // 8px padding from edges

	// Get dynamic track labels width, fallback to 0 if no tracks or no ref
	const trackLabelsWidth =
		tracks.length > 0 && trackLabelsRef?.current
			? trackLabelsRef.current.offsetWidth
			: 0;

	const leftPosition =
		trackLabelsWidth +
		snapPoint.time * TIMELINE_CONSTANTS.PIXELS_PER_SECOND * zoomLevel;

	return (
		<div
			className="absolute pointer-events-none z-[90]"
			style={{
				left: `${leftPosition}px`,
				top: 0,
				height: `${totalHeight}px`,
				width: "2px",
			}}
		>
			<div className={`w-0.5 h-full bg-primary/40 opacity-80`} />
		</div>
	);
}