"use client";

import React, { useState } from "react";
import {
  AlertCircle,
  Box,
  Copy,
  Download,
  ExternalLink,
  Loader2,
  MoreVertical,
  Trash2,
} 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 type { CanvasNode, Model3DNodeData } from "@/types/canvas";
import { cn } from "@/lib/utils";

interface Model3DNodeProps {
  node: CanvasNode;
  isSelected: boolean;
}

function inferModelFileName(data: Model3DNodeData, nodeId: string) {
  const raw = String(data.src || "").trim();
  if (!raw) return `model3d-${nodeId.slice(0, 6)}.glb`;
  try {
    const url = new URL(raw);
    const filename = url.pathname.split("/").filter(Boolean).pop();
    if (filename) return decodeURIComponent(filename);
  } catch {}
  return raw.split("/").pop() || `model3d-${nodeId.slice(0, 6)}.glb`;
}

function inferModelFormat(data: Model3DNodeData) {
  if (data.format) return data.format.toUpperCase();
  const src = String(data.src || "").toLowerCase();
  if (src.endsWith(".gltf")) return "GLTF";
  if (src.endsWith(".glb")) return "GLB";
  if (src.endsWith(".usdz")) return "USDZ";
  if (src.endsWith(".fbx")) return "FBX";
  if (src.endsWith(".obj")) return "OBJ";
  if (src.endsWith(".stl")) return "STL";
  if (src.endsWith(".3mf")) return "3MF";
  return "3D";
}

export function Model3DNode({ node, isSelected }: Model3DNodeProps) {
  const data = node.data as Model3DNodeData;
  const [isHovered, setIsHovered] = useState(false);
  const deleteNode = useCanvasStore((state) => state.deleteNode);
  const providerLabel =
    data.metadata?.provider === "worldlabs-3d" ? "World Labs 结果" : "Tripo3D 结果";

  const handleOpen = () => {
    if (!data.src) {
      toast.error("暂无可打开的 3D 地址");
      return;
    }
    window.open(data.src, "_blank", "noopener,noreferrer");
  };

  const handleDownload = () => {
    if (!data.src) {
      toast.error("暂无可下载的 3D 文件");
      return;
    }
    const link = document.createElement("a");
    link.href = data.src;
    link.download = inferModelFileName(data, node.id);
    link.click();
  };

  const handleCopy = async () => {
    if (!data.src) {
      toast.error("暂无可复制的地址");
      return;
    }
    try {
      await navigator.clipboard.writeText(data.src);
      toast.success("已复制 3D 链接");
    } catch {
      toast.error("复制失败");
    }
  };

  return (
    <div
      className={cn(
        "relative h-full w-full overflow-hidden rounded-lg border bg-card shadow-sm",
        isSelected && "border-primary"
      )}
      onMouseEnter={() => setIsHovered(true)}
      onMouseLeave={() => setIsHovered(false)}
    >
      {data.status === "generating" ? (
        <div className="flex h-full w-full flex-col items-center justify-center gap-2 bg-muted/40">
          <Loader2 className="h-7 w-7 animate-spin text-primary" />
          <span className="text-xs text-muted-foreground">3D 生成中...</span>
        </div>
      ) : data.status === "failed" ? (
        <div className="flex h-full w-full flex-col items-center justify-center gap-2 bg-destructive/10">
          <AlertCircle className="h-7 w-7 text-destructive" />
          <span className="text-xs text-destructive">3D 生成失败</span>
        </div>
      ) : (
        <div className="flex h-full w-full flex-col">
          <div className="relative flex-1 overflow-hidden bg-muted/30">
            {data.previewImage ? (
              <img
                src={data.previewImage}
                alt={data.prompt || "3D 预览"}
                className="h-full w-full object-cover"
                draggable={false}
              />
            ) : (
              <div className="flex h-full w-full items-center justify-center">
                <Box className="h-12 w-12 text-muted-foreground/60" />
              </div>
            )}
            <div className="absolute left-2 top-2 rounded-md bg-background/85 px-2 py-0.5 text-[10px] font-medium">
              {inferModelFormat(data)}
            </div>
          </div>
          <div className="space-y-1 border-t px-3 py-2">
            <p className="truncate text-xs font-medium">
              {data.prompt || inferModelFileName(data, node.id)}
            </p>
            <p className="truncate text-[11px] text-muted-foreground">
              {data.modelVersion ? `模型: ${data.modelVersion}` : providerLabel}
            </p>
          </div>
        </div>
      )}

      {isHovered && data.status === "completed" && (
        <div className="absolute right-2 top-2 flex items-center gap-1">
          <Button
            variant="secondary"
            size="icon"
            className="h-7 w-7"
            onClick={handleOpen}
            title="打开3D"
          >
            <ExternalLink className="h-4 w-4" />
          </Button>
          <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={handleOpen}>
                <ExternalLink className="mr-2 h-4 w-4" />
                打开 3D
              </DropdownMenuItem>
              <DropdownMenuItem onClick={handleDownload}>
                <Download className="mr-2 h-4 w-4" />
                下载
              </DropdownMenuItem>
              <DropdownMenuItem onClick={handleCopy}>
                <Copy className="mr-2 h-4 w-4" />
                复制链接
              </DropdownMenuItem>
              <DropdownMenuSeparator />
              <DropdownMenuItem className="text-destructive" onClick={() => deleteNode(node.id)}>
                <Trash2 className="mr-2 h-4 w-4" />
                删除
              </DropdownMenuItem>
            </DropdownMenuContent>
          </DropdownMenu>
        </div>
      )}
    </div>
  );
}