"use client";

import { useState, useEffect } from "react";
import { Button } from "@/components/ui/button";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";
import { Check, Image, Ratio, Maximize2, Images } from "lucide-react";
import { cn } from "@/lib/utils";

// 图片生成参数接口
export interface ImageGenerationParams {
  aspectRatio: string;
  imageSize: string;
  imageCount?: number; // 🆕 生成图片数量
}

interface ImageParamsBarProps {
  modelName?: string;
  initialParams?: Partial<ImageGenerationParams>;
  onParamsChange?: (params: ImageGenerationParams) => void;
  inline?: boolean; // 内联模式：只显示参数按钮，不显示外层容器
  providerType?: string; // 🆕 模型类型：gemini, volcano-vision 等
}

// 图片比例选项（根据 Nano Banana 文档）
const ASPECT_RATIO_OPTIONS = [
  { value: "auto", label: "自动" },
  { value: "1:1", label: "1:1" },
  { value: "16:9", label: "16:9" },
  { value: "9:16", label: "9:16" },
  { value: "4:3", label: "4:3" },
  { value: "3:4", label: "3:4" },
  { value: "3:2", label: "3:2" },
  { value: "2:3", label: "2:3" },
  { value: "5:4", label: "5:4" },
  { value: "4:5", label: "4:5" },
  { value: "21:9", label: "21:9" },
] as const;

// 图片大小选项（仅支持 nano-banana-pro）
const IMAGE_SIZE_OPTIONS = [
  { value: "1K", label: "1K", disabled: false },
  { value: "2K", label: "2K ⚡", disabled: false }, // 默认推荐
  { value: "4K", label: "4K 🐌", disabled: false }, // 4K较慢
] as const;

export function ImageParamsBar({
  modelName = "Gemini 图片生成",
  initialParams,
  onParamsChange,
  inline = false,
  providerType = "gemini", // 默认 gemini
}: ImageParamsBarProps) {
  const [params, setParams] = useState<ImageGenerationParams>({
    aspectRatio: "auto",
    imageSize: "2K", // 默认 2K
    imageCount: 1, // 🆕 默认 1 张
    ...initialParams,
  });

  // 🆕 根据模型类型确定可选的图片数量
  const getImageCountOptions = () => {
    if (providerType === "volcano-vision") {
      // 即梦4.5（豆包）：1~3 张
      return [1, 2, 3];
    }
    // Gemini：1~2 张
    return [1, 2];
  };
  
  const imageCountOptions = getImageCountOptions();

  // 🆕 监听 initialParams 变化，确保状态同步
  useEffect(() => {
    console.log("[ImageParamsBar] Mount/Update - initialParams:", initialParams);
    if (initialParams) {
      setParams({
        aspectRatio: "auto",
        imageSize: "2K",
        imageCount: 1,
        ...initialParams,
      });
    }
  }, [initialParams]);

  const updateParam = <K extends keyof ImageGenerationParams>(
    key: K,
    value: ImageGenerationParams[K]
  ) => {
    const newParams = { ...params, [key]: value };
    console.log("[ImageParamsBar] Updating param:", key, "=", value);
    console.log("[ImageParamsBar] New params:", newParams);
    setParams(newParams);
    onParamsChange?.(newParams);
  };

  // 内联模式：只返回参数按钮，嵌入工具栏
  if (inline) {
    return (
      <div className="flex items-center ml-1 border-l border-border/50 pl-1">
        {/* 图片比例 */}
        <DropdownMenu>
          <DropdownMenuTrigger asChild>
            <Button variant="ghost" className="h-8 px-2 gap-1 focus-visible:ring-0 focus-visible:ring-offset-0 focus:outline-none focus:ring-0">
              <Ratio size={14} />
              <span className="font-medium text-xs">{params.aspectRatio}</span>
            </Button>
          </DropdownMenuTrigger>
          <DropdownMenuContent align="center" className="w-48">
            <div className="p-1.5 grid grid-cols-3 gap-1">
              {ASPECT_RATIO_OPTIONS.map((option) => (
                <Button
                  key={option.value}
                  variant={params.aspectRatio === option.value ? "secondary" : "ghost"}
                  size="sm"
                  className="h-7 text-xs focus-visible:ring-0 focus-visible:ring-offset-0 focus:outline-none focus:ring-0"
                  onClick={() => updateParam("aspectRatio", option.value)}
                >
                  {option.label}
                </Button>
              ))}
            </div>
          </DropdownMenuContent>
        </DropdownMenu>

        {/* 分辨率 */}
        <DropdownMenu>
          <DropdownMenuTrigger asChild>
            <Button variant="ghost" className="h-8 px-2 gap-1 focus-visible:ring-0 focus-visible:ring-offset-0 focus:outline-none focus:ring-0">
              <Maximize2 size={14} />
              <span className="font-medium text-xs">{params.imageSize}</span>
            </Button>
          </DropdownMenuTrigger>
          <DropdownMenuContent align="center" className="min-w-[100px]">
            {IMAGE_SIZE_OPTIONS.map((option) => (
              <DropdownMenuItem 
                key={option.value} 
                onClick={() => updateParam("imageSize", option.value)}
                className="focus-visible:ring-0 focus-visible:ring-offset-0 focus:outline-none focus:ring-0"
              >
                <Check className={cn("mr-2 h-4 w-4", params.imageSize === option.value ? "opacity-100" : "opacity-0")} />
                {option.label}
              </DropdownMenuItem>
            ))}
          </DropdownMenuContent>
        </DropdownMenu>

        {/* 🆕 图片数量 */}
        <DropdownMenu>
          <DropdownMenuTrigger asChild>
            <Button variant="ghost" className="h-8 px-2 gap-1 focus-visible:ring-0 focus-visible:ring-offset-0 focus:outline-none focus:ring-0">
              <Images size={14} />
              <span className="font-medium text-xs">{params.imageCount || 1}张</span>
            </Button>
          </DropdownMenuTrigger>
          <DropdownMenuContent align="center" className="min-w-[80px]">
            {imageCountOptions.map((count) => (
              <DropdownMenuItem 
                key={count} 
                onClick={() => updateParam("imageCount", count)}
                className="focus-visible:ring-0 focus-visible:ring-offset-0 focus:outline-none focus:ring-0"
              >
                <Check className={cn("mr-2 h-4 w-4", (params.imageCount || 1) === count ? "opacity-100" : "opacity-0")} />
                {count}张
              </DropdownMenuItem>
            ))}
          </DropdownMenuContent>
        </DropdownMenu>
      </div>
    );
  }

  // 非内联模式（暂时不实现，因为只需要内联模式）
  return null;
}