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"use client";
import { useRef } from "react";
import { TimelineTrack } from "@/types/timeline";
import {
TIMELINE_CONSTANTS,
getTotalTracksHeight,
} from "@/constants/timeline-constants";
import { useTimelinePlayhead } from "@/hooks/use-timeline-playhead";
interface TimelinePlayheadProps {
currentTime: number;
duration: number;
zoomLevel: number;
tracks: TimelineTrack[];
seek: (time: number) => void;
rulerRef: React.RefObject<HTMLDivElement>;
rulerScrollRef: React.RefObject<HTMLDivElement>;
tracksScrollRef: React.RefObject<HTMLDivElement>;
trackLabelsRef?: React.RefObject<HTMLDivElement>;
timelineRef: React.RefObject<HTMLDivElement>;
playheadRef?: React.RefObject<HTMLDivElement>;
isSnappingToPlayhead?: boolean;
}
export function TimelinePlayhead({
currentTime,
duration,
zoomLevel,
tracks,
seek,
rulerRef,
rulerScrollRef,
tracksScrollRef,
trackLabelsRef,
timelineRef,
playheadRef: externalPlayheadRef,
isSnappingToPlayhead = false,
}: TimelinePlayheadProps) {
const internalPlayheadRef = useRef<HTMLDivElement>(null);
const playheadRef = externalPlayheadRef || internalPlayheadRef;
const { playheadPosition, handlePlayheadMouseDown } = useTimelinePlayhead({
currentTime,
duration,
zoomLevel,
seek,
rulerRef,
rulerScrollRef,
tracksScrollRef,
playheadRef,
});
// Use timeline container height minus a few pixels for breathing room
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 +
playheadPosition * TIMELINE_CONSTANTS.PIXELS_PER_SECOND * zoomLevel;
return (
<div
ref={playheadRef}
className="absolute pointer-events-auto z-[100]"
style={{
left: `${leftPosition}px`,
top: 0,
height: `${totalHeight}px`,
width: "2px", // Slightly wider for better click target
}}
onMouseDown={handlePlayheadMouseDown}
>
{/* The playhead line spanning full height */}
<div
className={`absolute left-0 w-0.5 cursor-col-resize h-full ${isSnappingToPlayhead ? "bg-primary" : "bg-foreground"}`}
/>
{/* Playhead dot indicator at the top (in ruler area) */}
<div
className={`absolute top-1 left-1/2 transform -translate-x-1/2 w-3 h-3 rounded-full border-2 shadow-sm ${isSnappingToPlayhead ? "bg-primary border-primary" : "bg-foreground border-foreground"}`}
/>
</div>
);
}
// Also export a hook for getting ruler handlers
export function useTimelinePlayheadRuler({
currentTime,
duration,
zoomLevel,
seek,
rulerRef,
rulerScrollRef,
tracksScrollRef,
playheadRef,
}: Omit<TimelinePlayheadProps, "tracks" | "trackLabelsRef" | "timelineRef">) {
const { handleRulerMouseDown, isDraggingRuler } = useTimelinePlayhead({
currentTime,
duration,
zoomLevel,
seek,
rulerRef,
rulerScrollRef,
tracksScrollRef,
playheadRef,
});
return { handleRulerMouseDown, isDraggingRuler };
}
export { TimelinePlayhead as default };
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