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"use client";
import { useCallback, useRef } from "react";
import { Handle, Position, NodeProps, Node } from "@xyflow/react";
import { BaseNode } from "./BaseNode";
import { useCommentNavigation } from "@/hooks/useCommentNavigation";
import { useWorkflowStore } from "@/store/workflowStore";
import { ImageInputNodeData } from "@/types";
import { defaultNodeDimensions } from "@/store/utils/nodeDefaults";
import { useAdaptiveImageSrc } from "@/hooks/useAdaptiveImageSrc";
import { downloadMedia } from "@/utils/downloadMedia";
import { useShowHandleLabels } from "@/hooks/useShowHandleLabels";
import { HandleLabel } from "./HandleLabel";
import { readImageFile } from "@/utils/imageFile";
import type { LoadedImageFile } from "@/utils/imageFile";
type ImageInputNodeType = Node<ImageInputNodeData, "imageInput">;
export function ImageInputNode({ id, data, selected }: NodeProps<ImageInputNodeType>) {
const nodeData = data;
const adaptiveImage = useAdaptiveImageSrc(nodeData.image, id);
const commentNavigation = useCommentNavigation(id);
const updateNodeData = useWorkflowStore((state) => state.updateNodeData);
const addNode = useWorkflowStore((state) => state.addNode);
const onConnect = useWorkflowStore((state) => state.onConnect);
const nodes = useWorkflowStore((state) => state.nodes);
const fileInputRef = useRef<HTMLInputElement>(null);
const imageToImageInputRef = useRef<HTMLInputElement>(null);
const showLabels = useShowHandleLabels(selected);
const writeLoadedImage = useCallback(
(loaded: LoadedImageFile) => {
updateNodeData(id, {
image: loaded.image,
imageRef: undefined,
filename: loaded.filename,
dimensions: loaded.dimensions,
});
},
[id, updateNodeData]
);
const applyImageFile = useCallback(
async (file: File) => {
try {
const loaded = await readImageFile(file);
writeLoadedImage(loaded);
} catch (error) {
alert(error instanceof Error ? error.message : "Failed to load image file.");
}
},
[writeLoadedImage]
);
const handleImageToImageFile = useCallback(
async (file: File) => {
try {
const loaded = await readImageFile(file);
writeLoadedImage(loaded);
const currentNode = nodes.find((node) => node.id === id);
const currentWidth =
currentNode?.measured?.width ??
(typeof currentNode?.style?.width === "number" ? currentNode.style.width : defaultNodeDimensions.imageInput.width);
const currentPosition = currentNode?.position ?? { x: 0, y: 0 };
const nextNodeId = addNode("nanoBanana", {
x: currentPosition.x + currentWidth + 180,
y: currentPosition.y,
});
onConnect({
source: id,
sourceHandle: "image",
target: nextNodeId,
targetHandle: "image",
});
} catch (error) {
alert(error instanceof Error ? error.message : "Failed to load image file.");
}
},
[addNode, id, nodes, onConnect, writeLoadedImage]
);
const handleFileChange = useCallback(
(e: React.ChangeEvent<HTMLInputElement>) => {
const input = e.currentTarget;
const file = input.files?.[0];
if (!file) return;
void applyImageFile(file);
input.value = "";
},
[applyImageFile]
);
const handleImageToImageChange = useCallback(
(e: React.ChangeEvent<HTMLInputElement>) => {
const input = e.currentTarget;
const file = input.files?.[0];
if (!file) return;
void handleImageToImageFile(file);
input.value = "";
},
[handleImageToImageFile]
);
const handleDrop = useCallback(
(e: React.DragEvent) => {
e.preventDefault();
e.stopPropagation();
const file = e.dataTransfer.files?.[0];
if (!file) return;
void applyImageFile(file);
},
[applyImageFile]
);
const handleDragOver = useCallback((e: React.DragEvent) => {
e.preventDefault();
e.stopPropagation();
}, []);
const handleRemove = useCallback(() => {
updateNodeData(id, {
image: null,
imageRef: undefined,
filename: null,
dimensions: null,
});
}, [id, updateNodeData]);
return (
<BaseNode
id={id}
selected={selected}
contentClassName="flex-1 min-h-0"
aspectFitMedia={nodeData.image}
fullBleed
>
<input
ref={fileInputRef}
type="file"
accept="image/png,image/jpeg,image/webp"
onChange={handleFileChange}
className="hidden"
/>
<input
ref={imageToImageInputRef}
type="file"
accept="image/png,image/jpeg,image/webp"
onChange={handleImageToImageChange}
className="hidden"
aria-label="Upload image for image to image"
/>
{nodeData.image ? (
<div className="relative group w-full h-full overflow-clip rounded-lg">
<img
src={adaptiveImage ?? undefined}
alt={nodeData.filename || "Uploaded image"}
className="w-full h-full object-cover rounded-lg"
/>
{nodeData.isOptional && (
<span className="absolute bottom-2 left-2 text-[9px] font-medium text-neutral-300 bg-black/50 px-1.5 py-0.5 rounded">
Optional
</span>
)}
<button
onClick={() => downloadMedia(nodeData.image!, "image")}
aria-label="Download image"
className="absolute top-2 right-10 w-6 h-6 bg-black/60 hover:bg-black/80 text-white rounded text-xs opacity-0 group-hover:opacity-100 focus:opacity-100 transition-all flex items-center justify-center"
>
<svg className="w-3.5 h-3.5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
<path strokeLinecap="round" strokeLinejoin="round" d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-4l-4 4m0 0l-4-4m4 4V4" />
</svg>
</button>
<button
onClick={handleRemove}
aria-label="Remove image"
className="absolute top-2 right-2 w-6 h-6 bg-black/60 hover:bg-red-600/80 text-white rounded text-xs opacity-0 group-hover:opacity-100 focus:opacity-100 focus:ring-1 focus:ring-red-400 transition-all flex items-center justify-center"
>
<svg className="w-3.5 h-3.5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
<path strokeLinecap="round" strokeLinejoin="round" d="M6 18L18 6M6 6l12 12" />
</svg>
</button>
</div>
) : (
<div
onDrop={handleDrop}
onDragOver={handleDragOver}
className={`w-full h-full bg-neutral-900/40 flex flex-col items-center justify-center transition-colors ${nodeData.isOptional ? "border-2 border-dashed border-neutral-600" : ""}`}
>
<svg className="w-12 h-12 text-neutral-600" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.4}>
<path strokeLinecap="round" strokeLinejoin="round" d="m3 16 4.5-4.5a2.1 2.1 0 0 1 3 0L14 15m-1-1 1.5-1.5a2.1 2.1 0 0 1 3 0L21 16m-15 4h12a3 3 0 0 0 3-3V7a3 3 0 0 0-3-3H6a3 3 0 0 0-3 3v10a3 3 0 0 0 3 3Zm11-11.5h.01" />
</svg>
{nodeData.isOptional ? (
<span className="text-xs text-neutral-500 mt-2">Optional</span>
) : (
<div className="mt-8 w-full max-w-[160px] self-start ml-7">
<div className="mb-3 text-sm text-neutral-400">:</div>
<button
type="button"
className="nodrag nopan mb-4 flex items-center gap-2 text-sm font-semibold text-white transition-colors hover:text-blue-200 focus:outline-none focus:text-blue-200"
onClick={(event) => {
event.preventDefault();
event.stopPropagation();
imageToImageInputRef.current?.click();
}}
>
<svg className="h-4 w-4 shrink-0" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.8}>
<path strokeLinecap="round" strokeLinejoin="round" d="M12 16V5m0 0 4 4m-4-4-4 4M5 19h14" />
</svg>
</button>
<button
type="button"
disabled
aria-label="图片高清"
title="图片高清功能待接入"
className="nodrag nopan flex cursor-not-allowed items-center gap-2 text-sm font-semibold text-white/85"
>
<span className="flex h-4 min-w-4 items-center justify-center rounded border border-white/80 px-0.5 text-[10px] font-bold leading-none">
HD
</span>
</button>
</div>
)}
</div>
)}
{/* Handles rendered after visual content so they paint on top */}
<Handle
type="target"
position={Position.Left}
id="reference"
data-handletype="reference"
data-tutorial="node-input-handle"
className="!bg-gray-500"
/>
<HandleLabel label="Ref" side="target" color="#6b7280" visible={showLabels} />
<Handle
type="source"
position={Position.Right}
id="image"
data-handletype="image"
data-tutorial="node-output-handle"
/>
<HandleLabel label="Image" side="source" color="var(--handle-color-image)" visible={showLabels} />
</BaseNode>
);
}