"use client";

import { useElementSelection } from "@/hooks/timeline/element/use-element-selection";
import { TimelineElement } from "./timeline-element";
import type { TimelineTrack } from "@/lib/timeline";
import type { TimelineElement as TimelineElementType } from "@/lib/timeline";
import type { SnapPoint } from "@/lib/timeline/snap-utils";
import { TIMELINE_LAYERS } from "./layers";
import { BASE_TIMELINE_PIXELS_PER_SECOND } from "@/lib/timeline/scale";
import { useEdgeAutoScroll } from "@/hooks/timeline/use-edge-auto-scroll";
import type { ElementDragState } from "@/lib/timeline";
import { useEditor } from "@/hooks/use-editor";

interface TimelineTrackContentProps {
	track: TimelineTrack;
	zoomLevel: number;
	dragState: ElementDragState;
	rulerScrollRef: React.RefObject<HTMLDivElement | null>;
	tracksScrollRef: React.RefObject<HTMLDivElement | null>;
	lastMouseXRef: React.RefObject<number>;
	onSnapPointChange?: (snapPoint: SnapPoint | null) => void;
	onResizeStateChange?: (params: { isResizing: boolean }) => void;
	onElementMouseDown: (params: {
		event: React.MouseEvent;
		element: TimelineElementType;
		track: TimelineTrack;
	}) => void;
	onElementClick: (params: {
		event: React.MouseEvent;
		element: TimelineElementType;
		track: TimelineTrack;
	}) => void;
	onTrackMouseDown?: (event: React.MouseEvent) => void;
	onTrackMouseUp?: (event: React.MouseEvent) => void;
	shouldIgnoreClick?: () => boolean;
	targetElementId?: string | null;
}

export function TimelineTrackContent({
	track,
	zoomLevel,
	dragState,
	rulerScrollRef,
	tracksScrollRef,
	lastMouseXRef,
	onSnapPointChange,
	onResizeStateChange,
	onElementMouseDown,
	onElementClick,
	onTrackMouseDown,
	onTrackMouseUp,
	shouldIgnoreClick,
	targetElementId = null,
}: TimelineTrackContentProps) {
	const { isElementSelected } = useElementSelection();
	const duration = useEditor((e) => e.timeline.getTotalDuration());

	useEdgeAutoScroll({
		isActive: dragState.isDragging,
		getMouseClientX: () => lastMouseXRef.current ?? 0,
		rulerScrollRef,
		tracksScrollRef,
		contentWidth: duration * BASE_TIMELINE_PIXELS_PER_SECOND * zoomLevel,
	});

	return (
		<div className="relative size-full">
			<button
				type="button"
				className="absolute inset-0 m-0 size-full appearance-none border-0 bg-transparent p-0"
				aria-label={`Select ${track.name} track`}
			onMouseUp={(event) => {
					if (shouldIgnoreClick?.()) return;
				onTrackMouseUp?.(event);
				}}
				onMouseDown={(event) => {
					event.preventDefault();
					onTrackMouseDown?.(event);
				}}
			/>
			{/* biome-ignore lint/a11y/noStaticElementInteractions: empty track area is a pointer-only seek surface */}
			<div
				className="relative h-full min-w-full"
				style={{ zIndex: TIMELINE_LAYERS.trackContent }}
				onMouseUp={(event) => {
					if (event.target !== event.currentTarget) return;
					if (shouldIgnoreClick?.()) return;
					onTrackMouseUp?.(event);
				}}
				onMouseDown={(event) => {
					if (event.target !== event.currentTarget) return;
					event.preventDefault();
					onTrackMouseDown?.(event);
				}}
			>
				{track.elements.length === 0 ? (
					<div className="text-muted-foreground border-muted/30 pointer-events-none flex size-full items-center justify-center rounded-sm border-2 border-dashed text-xs" />
				) : (
					track.elements.map((element) => {
						const isSelected = isElementSelected({
							trackId: track.id,
							elementId: element.id,
						});

						return (
							<TimelineElement
								key={element.id}
								element={element}
								track={track}
								zoomLevel={zoomLevel}
								isSelected={isSelected}
								onSnapPointChange={onSnapPointChange}
								onResizeStateChange={onResizeStateChange}
								onElementMouseDown={(event, element) =>
									onElementMouseDown({ event, element, track })
								}
								onElementClick={(event, element) =>
									onElementClick({ event, element, track })
								}
								dragState={dragState}
								isDropTarget={element.id === targetElementId}
							/>
						);
					})
				)}
			</div>
		</div>
	);
}