"use client";

import React, { useState, useRef } from "react";
import { ImagePlus, Loader2, AlertCircle, MoreVertical, Scissors, Sparkles, Expand, Maximize2, Move3D, Layers, Download, Trash2, RefreshCw } from "lucide-react";
import { Button } from "@/components/ui/button";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";
import { toast } from "sonner";
import { useCanvasStore } from "@/store/canvas";
import { imageGenerationService } from "@/services/canvas";
import type { CanvasNode, ImageNodeData } from "@/types/canvas";
import { cn } from "@/lib/utils";
import { AngleEditDialog } from "@/components/angle-edit-dialog";
import { SceneFusionDialog } from "@/components/scene-fusion-dialog";

interface ImageNodeProps {
  node: CanvasNode;
  isSelected: boolean;
}

export function ImageNode({ node, isSelected }: ImageNodeProps) {
  const data = node.data as ImageNodeData;
  const [isHovered, setIsHovered] = useState(false);
  const [isProcessing, setIsProcessing] = useState(false);
  const [angleDialogOpen, setAngleDialogOpen] = useState(false);
  const [sceneFusionDialogOpen, setSceneFusionDialogOpen] = useState(false);
  const [isUploading, setIsUploading] = useState(false);
  
  // 文件输入的 ref
  const fileInputRef = useRef<HTMLInputElement>(null);
  
  const updateNode = useCanvasStore((state) => state.updateNode);
  const deleteNode = useCanvasStore((state) => state.deleteNode);
  const addNode = useCanvasStore((state) => state.addNode);

  // 触发文件选择
  const handleSelectFile = (e: React.MouseEvent) => {
    e.preventDefault();
    e.stopPropagation();
    fileInputRef.current?.click();
  };

  // 处理图片上传 - 上传到存储桶，不使用 Base64
  const handleImageUpload = async (e: React.ChangeEvent<HTMLInputElement>) => {
    const file = e.target.files?.[0];
    if (!file) return;
    
    // 验证文件类型
    if (!file.type.startsWith('image/')) {
      toast.error('请上传图片文件');
      return;
    }
    
    // 验证文件大小 (8MB)
    if (file.size > 8 * 1024 * 1024) {
      toast.error('图片大小不能超过 8MB');
      return;
    }
    
    setIsUploading(true);
    // 先显示上传中状态
    updateNode(node.id, {
      data: { ...data, status: 'generating' },
    });
    
    try {
      // 上传到存储桶
      const result = await imageGenerationService.uploadImage(file);
      
      if (result.success && result.data?.url) {
        updateNode(node.id, {
          data: { 
            ...data, 
            src: result.data.url, 
            status: 'completed' 
          },
        });
        toast.success('图片上传成功');
      } else {
        updateNode(node.id, {
          data: { ...data, status: 'failed' },
        });
        toast.error(result.error || '图片上传失败');
      }
    } catch (error) {
      console.error('图片上传失败:', error);
      updateNode(node.id, {
        data: { ...data, status: 'failed' },
      });
      toast.error('图片上传失败，请重试');
    } finally {
      setIsUploading(false);
    }
    
    // 重置 input
    e.target.value = '';
  };

  // 获取操作的中文名称
  const getActionName = (action: string): string => {
    const names: Record<string, string> = {
      'rmbg': '抠图',
      'enhance': '变清晰',
      'extend': '图片扩展',
      'resize': '尺寸调整',
      'angle': '角度编辑',
      'scene-fusion': '场景裂变',
    };
    return names[action] || action;
  };

  // 处理图片编辑操作 - 集成我们现有的 API
  const handleAction = async (action: string) => {
    if (!data.src) {
      toast.error("请先上传图片");
      return;
    }

    // 对话框类型的操作
    if (action === 'angle') {
      setAngleDialogOpen(true);
      return;
    }
    if (action === 'scene-fusion') {
      setSceneFusionDialogOpen(true);
      return;
    }
    if (action === 'resize') {
      toast.info("尺寸调整功能即将上线");
      return;
    }

    const actionName = getActionName(action);

    // 先创建一个"处理中"状态的节点，显示在原图右侧
    const newNodeId = addNode({
      type: 'image',
      position: { 
        x: node.position.x + node.size.width + 20, 
        y: node.position.y 
      },
      size: { width: node.size.width, height: node.size.height },
      data: { 
        src: '', // 暂时没有图片
        status: 'generating',
        prompt: `${actionName}处理中...`,
        originalSrc: data.src,
      },
      connections: [node.id],
    });

    let result;

    try {
      switch (action) {
        case 'rmbg':
          result = await imageGenerationService.removeBackground(data.src);
          break;
        case 'enhance':
          result = await imageGenerationService.enhanceImage(data.src);
          break;
        case 'extend':
          result = await imageGenerationService.extendImage(data.src);
          break;
        default:
          // 删除创建的节点
          if (newNodeId) deleteNode(newNodeId);
          return;
      }

      if (result?.success && result.data?.url) {
        // 更新节点为完成状态
        if (newNodeId) {
          updateNode(newNodeId, {
            data: { 
              src: result.data.url, 
              status: 'completed',
              prompt: `${actionName}结果`,
              originalSrc: data.src,
            },
          });
        }
        toast.success(`${actionName}处理完成`);
      } else {
        // 更新节点为失败状态
        if (newNodeId) {
          updateNode(newNodeId, {
            data: { 
              src: '', 
              status: 'failed',
              prompt: `${actionName}失败`,
              originalSrc: data.src,
            },
          });
        }
        toast.error(result?.error || "处理失败");
      }
    } catch (error) {
      console.error(`${action} 处理失败:`, error);
      // 更新节点为失败状态
      if (newNodeId) {
        updateNode(newNodeId, {
          data: { 
            src: '', 
            status: 'failed',
            prompt: `${actionName}失败`,
            originalSrc: data.src,
          },
        });
      }
      toast.error("处理失败，请重试");
    }
  };

  // 角度编辑完成回调
  const handleAngleEditComplete = (resultUrl: string) => {
    // 创建新的图片节点显示结果
    addNode({
      type: 'image',
      position: { 
        x: node.position.x + node.size.width + 20, 
        y: node.position.y 
      },
      size: { width: node.size.width, height: node.size.height },
      data: { 
        src: resultUrl, 
        status: 'completed',
        prompt: '角度编辑结果',
        originalSrc: data.src,
      },
      connections: [node.id],
    });
  };

  // 下载图片
  const handleDownload = () => {
    if (data.src) {
      const link = document.createElement('a');
      link.href = data.src;
      link.download = `image-${node.id}.png`;
      link.click();
    }
  };

  return (
    <>
      <div
        className={cn(
          "relative w-full h-full bg-card rounded-lg overflow-hidden border shadow-sm",
          isSelected && "border-primary"
        )}
        onMouseEnter={() => setIsHovered(true)}
        onMouseLeave={() => setIsHovered(false)}
      >
        {/* 图片内容 */}
        {data.src ? (
          <img
            src={data.src}
            alt={data.prompt || "图片"}
            className="w-full h-full object-cover"
            draggable={false}
          />
        ) : data.status === 'generating' ? (
          <div className="w-full h-full flex flex-col items-center justify-center bg-muted">
            <Loader2 className="h-8 w-8 animate-spin text-primary mb-2" />
            <span className="text-sm text-muted-foreground">生成中...</span>
          </div>
        ) : data.status === 'failed' ? (
          <div className="w-full h-full flex flex-col items-center justify-center bg-destructive/10">
            <AlertCircle className="h-8 w-8 text-destructive mb-2" />
            <span className="text-sm text-destructive">生成失败</span>
          </div>
        ) : (
          <div className="w-full h-full flex flex-col items-center justify-center bg-muted">
            <ImagePlus className="h-8 w-8 text-muted-foreground mb-2" />
            <span className="text-sm text-muted-foreground mb-3">点击上传图片</span>
            {/* 隐藏的文件输入 */}
            <input
              ref={fileInputRef}
              type="file"
              accept="image/*"
              className="hidden"
              onChange={handleImageUpload}
            />
            {/* 选择文件按钮 */}
            <button
              type="button"
              onClick={handleSelectFile}
              className="px-4 py-2 bg-primary text-primary-foreground text-sm rounded-md hover:bg-primary/90 transition-colors cursor-pointer"
            >
              选择文件
            </button>
          </div>
        )}

        {/* 处理中遮罩 */}
        {isProcessing && (
          <div className="absolute inset-0 bg-black/50 flex items-center justify-center">
            <div className="flex flex-col items-center">
              <Loader2 className="h-8 w-8 animate-spin text-white mb-2" />
              <span className="text-sm text-white">处理中...</span>
            </div>
          </div>
        )}

        {/* 选中时显示的顶部工具栏 - 和聊天窗口中的功能一致 */}
        {isSelected && data.src && !isProcessing && (
          <div 
            className="absolute -top-12 left-1/2 -translate-x-1/2 flex items-center gap-1 bg-background/95 backdrop-blur-sm border rounded-lg shadow-lg p-1.5 z-10"
            onClick={(e) => e.stopPropagation()}
          >
            <Button
              variant="ghost"
              size="sm"
              className="h-8 px-2 text-xs gap-1"
              onClick={() => handleAction('rmbg')}
              title="抠图"
            >
              <Scissors className="h-3.5 w-3.5" />
              <span className="hidden sm:inline">抠图</span>
            </Button>
            <Button
              variant="ghost"
              size="sm"
              className="h-8 px-2 text-xs gap-1"
              onClick={() => handleAction('enhance')}
              title="变清晰"
            >
              <Sparkles className="h-3.5 w-3.5" />
              <span className="hidden sm:inline">变清晰</span>
            </Button>
            <Button
              variant="ghost"
              size="sm"
              className="h-8 px-2 text-xs gap-1"
              onClick={() => handleAction('extend')}
              title="扩展"
            >
              <Expand className="h-3.5 w-3.5" />
              <span className="hidden sm:inline">扩展</span>
            </Button>
            <Button
              variant="ghost"
              size="sm"
              className="h-8 px-2 text-xs gap-1"
              onClick={() => handleAction('resize')}
              title="调整"
            >
              <Maximize2 className="h-3.5 w-3.5" />
              <span className="hidden sm:inline">调整</span>
            </Button>
            <Button
              variant="ghost"
              size="sm"
              className="h-8 px-2 text-xs gap-1"
              onClick={() => handleAction('angle')}
              title="角度"
            >
              <Move3D className="h-3.5 w-3.5" />
              <span className="hidden sm:inline">角度</span>
            </Button>
            <Button
              variant="ghost"
              size="sm"
              className="h-8 px-2 text-xs gap-1"
              onClick={() => handleAction('scene-fusion')}
              title="场景"
            >
              <Layers className="h-3.5 w-3.5" />
              <span className="hidden sm:inline">场景</span>
            </Button>
            <div className="w-px h-5 bg-border mx-0.5" />
            <Button
              variant="ghost"
              size="sm"
              className="h-8 px-2 text-xs gap-1"
              onClick={handleDownload}
              title="下载"
            >
              <Download className="h-3.5 w-3.5" />
            </Button>
            <Button
              variant="ghost"
              size="sm"
              className="h-8 px-2 text-xs gap-1 text-destructive hover:text-destructive"
              onClick={() => deleteNode(node.id)}
              title="删除"
            >
              <Trash2 className="h-3.5 w-3.5" />
            </Button>
          </div>
        )}

        {/* 悬浮时的更多操作按钮 (右上角) */}
        {isHovered && data.src && !isProcessing && !isSelected && (
          <div className="absolute top-2 right-2 flex items-center gap-1">
            <DropdownMenu>
              <DropdownMenuTrigger asChild>
                <Button variant="secondary" size="icon" className="h-7 w-7">
                  <MoreVertical className="h-4 w-4" />
                </Button>
              </DropdownMenuTrigger>
              <DropdownMenuContent align="end">
                <DropdownMenuItem onClick={() => handleAction('rmbg')}>
                  <Scissors className="h-4 w-4 mr-2" />
                  抠图
                </DropdownMenuItem>
                <DropdownMenuItem onClick={() => handleAction('enhance')}>
                  <Sparkles className="h-4 w-4 mr-2" />
                  变清晰
                </DropdownMenuItem>
                <DropdownMenuItem onClick={() => handleAction('extend')}>
                  <Expand className="h-4 w-4 mr-2" />
                  图片扩展
                </DropdownMenuItem>
                <DropdownMenuItem onClick={() => handleAction('resize')}>
                  <Maximize2 className="h-4 w-4 mr-2" />
                  尺寸调整
                </DropdownMenuItem>
                <DropdownMenuItem onClick={() => handleAction('angle')}>
                  <Move3D className="h-4 w-4 mr-2" />
                  角度编辑
                </DropdownMenuItem>
                <DropdownMenuItem onClick={() => handleAction('scene-fusion')}>
                  <Layers className="h-4 w-4 mr-2" />
                  场景裂变
                </DropdownMenuItem>
                <DropdownMenuSeparator />
                <DropdownMenuItem onClick={handleDownload}>
                  <Download className="h-4 w-4 mr-2" />
                  下载
                </DropdownMenuItem>
                <DropdownMenuItem 
                  className="text-destructive"
                  onClick={() => deleteNode(node.id)}
                >
                  <Trash2 className="h-4 w-4 mr-2" />
                  删除
                </DropdownMenuItem>
              </DropdownMenuContent>
            </DropdownMenu>
          </div>
        )}

        {/* 提示词显示 */}
        {data.prompt && isHovered && !isProcessing && (
          <div className="absolute bottom-0 left-0 right-0 bg-gradient-to-t from-black/80 to-transparent p-3">
            <p className="text-xs text-white line-clamp-2">{data.prompt}</p>
          </div>
        )}
      </div>

      {/* 角度编辑对话框 */}
      {data.src && (
        <AngleEditDialog
          open={angleDialogOpen}
          onOpenChange={setAngleDialogOpen}
          imageUrl={data.src}
          onComplete={handleAngleEditComplete}
        />
      )}

      {/* 场景裂变对话框 */}
      <SceneFusionDialog
        open={sceneFusionDialogOpen}
        onOpenChange={setSceneFusionDialogOpen}
      />
    </>
  );
}