import { useRef } from "react";
import { Rnd } from "react-rnd";
import { cn } from "@/lib/utils";
import { getArrowComponent } from "./ArrowSvgs";
import type { AnnotationRegion } from "./types";

interface AnnotationOverlayProps {
	annotation: AnnotationRegion;
	isSelected: boolean;
	containerWidth: number;
	containerHeight: number;
	onPositionChange: (id: string, position: { x: number; y: number }) => void;
	onSizeChange: (id: string, size: { width: number; height: number }) => void;
	onClick: (id: string) => void;
	zIndex: number;
	isSelectedBoost: boolean; // Boost z-index when selected for easy editing
}

export function AnnotationOverlay({
	annotation,
	isSelected,
	containerWidth,
	containerHeight,
	onPositionChange,
	onSizeChange,
	onClick,
	zIndex,
	isSelectedBoost,
}: AnnotationOverlayProps) {
	const x = (annotation.position.x / 100) * containerWidth;
	const y = (annotation.position.y / 100) * containerHeight;
	const width = (annotation.size.width / 100) * containerWidth;
	const height = (annotation.size.height / 100) * containerHeight;

	const isDraggingRef = useRef(false);

	const renderArrow = () => {
		const direction = annotation.figureData?.arrowDirection || "right";
		const color = annotation.figureData?.color || "#34B27B";
		const strokeWidth = annotation.figureData?.strokeWidth || 4;

		const ArrowComponent = getArrowComponent(direction);
		return <ArrowComponent color={color} strokeWidth={strokeWidth} />;
	};

	const renderContent = () => {
		switch (annotation.type) {
			case "text":
				return (
					<div
						className="w-full h-full flex items-center p-2 overflow-hidden"
						style={{
							justifyContent:
								annotation.style.textAlign === "left"
									? "flex-start"
									: annotation.style.textAlign === "right"
										? "flex-end"
										: "center",
							alignItems: "center",
						}}
					>
						<span
							style={{
								color: annotation.style.color,
								backgroundColor: annotation.style.backgroundColor,
								fontSize: `${annotation.style.fontSize}px`,
								fontFamily: annotation.style.fontFamily,
								fontWeight: annotation.style.fontWeight,
								fontStyle: annotation.style.fontStyle,
								textDecoration: annotation.style.textDecoration,
								textAlign: annotation.style.textAlign,
								wordBreak: "break-word",
								whiteSpace: "pre-wrap",
								boxDecorationBreak: "clone",
								WebkitBoxDecorationBreak: "clone",
								padding: "0.1em 0.2em",
								borderRadius: "4px",
								lineHeight: "1.4",
							}}
						>
							{annotation.content}
						</span>
					</div>
				);

			case "image":
				if (annotation.content && annotation.content.startsWith("data:image")) {
					return (
						<img
							src={annotation.content}
							alt="Annotation"
							className="w-full h-full object-contain"
							draggable={false}
						/>
					);
				}
				return (
					<div className="w-full h-full flex items-center justify-center text-slate-400 text-sm">
						No image
					</div>
				);

			case "figure":
				if (!annotation.figureData) {
					return (
						<div className="w-full h-full flex items-center justify-center text-slate-400 text-sm">
							No arrow data
						</div>
					);
				}

				return (
					<div className="w-full h-full flex items-center justify-center p-2">{renderArrow()}</div>
				);

			default:
				return null;
		}
	};

	return (
		<Rnd
			position={{ x, y }}
			size={{ width, height }}
			onDragStart={() => {
				isDraggingRef.current = true;
			}}
			onDragStop={(_e, d) => {
				const xPercent = (d.x / containerWidth) * 100;
				const yPercent = (d.y / containerHeight) * 100;
				onPositionChange(annotation.id, { x: xPercent, y: yPercent });

				// Reset dragging flag after a short delay to prevent click event
				setTimeout(() => {
					isDraggingRef.current = false;
				}, 100);
			}}
			onResizeStop={(_e, _direction, ref, _delta, position) => {
				const xPercent = (position.x / containerWidth) * 100;
				const yPercent = (position.y / containerHeight) * 100;
				const widthPercent = (ref.offsetWidth / containerWidth) * 100;
				const heightPercent = (ref.offsetHeight / containerHeight) * 100;
				onPositionChange(annotation.id, { x: xPercent, y: yPercent });
				onSizeChange(annotation.id, { width: widthPercent, height: heightPercent });
			}}
			onClick={() => {
				if (isDraggingRef.current) return;
				onClick(annotation.id);
			}}
			bounds="parent"
			className={cn(
				"cursor-move transition-all",
				isSelected && "ring-2 ring-[#34B27B] ring-offset-2 ring-offset-transparent",
			)}
			style={{
				zIndex: isSelectedBoost ? zIndex + 1000 : zIndex, // Boost selected annotation to ensure it's on top
				pointerEvents: isSelected ? "auto" : "none",
				border: isSelected ? "2px solid rgba(52, 178, 123, 0.8)" : "none",
				backgroundColor: isSelected ? "rgba(52, 178, 123, 0.1)" : "transparent",
				boxShadow: isSelected ? "0 0 0 1px rgba(52, 178, 123, 0.35)" : "none",
			}}
			enableResizing={isSelected}
			disableDragging={!isSelected}
			resizeHandleStyles={{
				topLeft: {
					width: "12px",
					height: "12px",
					backgroundColor: isSelected ? "white" : "transparent",
					border: isSelected ? "2px solid #34B27B" : "none",
					borderRadius: "50%",
					left: "-6px",
					top: "-6px",
					cursor: "nwse-resize",
				},
				topRight: {
					width: "12px",
					height: "12px",
					backgroundColor: isSelected ? "white" : "transparent",
					border: isSelected ? "2px solid #34B27B" : "none",
					borderRadius: "50%",
					right: "-6px",
					top: "-6px",
					cursor: "nesw-resize",
				},
				bottomLeft: {
					width: "12px",
					height: "12px",
					backgroundColor: isSelected ? "white" : "transparent",
					border: isSelected ? "2px solid #34B27B" : "none",
					borderRadius: "50%",
					left: "-6px",
					bottom: "-6px",
					cursor: "nesw-resize",
				},
				bottomRight: {
					width: "12px",
					height: "12px",
					backgroundColor: isSelected ? "white" : "transparent",
					border: isSelected ? "2px solid #34B27B" : "none",
					borderRadius: "50%",
					right: "-6px",
					bottom: "-6px",
					cursor: "nwse-resize",
				},
			}}
		>
			<div
				className={cn(
					"w-full h-full rounded-lg",
					annotation.type === "text" && "bg-transparent",
					annotation.type === "image" && "bg-transparent",
					annotation.type === "figure" && "bg-transparent",
					isSelected && "shadow-lg",
				)}
			>
				{renderContent()}
			</div>
		</Rnd>
	);
}