"use client";

import { useState, useEffect } from "react";
import { Button } from "@/components/ui/button";
import { Card } from "@/components/ui/card";
import { fetchPublicAIModels, type AIConfig } from "@/features/agent/services/aiConfigApi";

export type ChatModeType = "human" | "ai" | "image";

interface ChatModeSelectorProps {
  onSelect: (mode: ChatModeType, aiConfigId?: number) => void;
  loading?: boolean;
}

export function ChatModeSelector({ onSelect, loading }: ChatModeSelectorProps) {
  const [aiModels, setAiModels] = useState<AIConfig[]>([]);
  const [imageModels, setImageModels] = useState<AIConfig[]>([]);
  const [loadingModels, setLoadingModels] = useState(true);
  const [selectedAIModel, setSelectedAIModel] = useState<number | null>(null);
  const [selectedImageModel, setSelectedImageModel] = useState<number | null>(null);

  // 加载开放的 AI（文本）与生图模型列表
  useEffect(() => {
    async function loadModels() {
      try {
        const [textModels, imgModels] = await Promise.all([
          fetchPublicAIModels("text"),
          fetchPublicAIModels("image"),
        ]);
        setAiModels(textModels);
        setImageModels(imgModels);
        if (textModels.length > 0) setSelectedAIModel(textModels[0].id);
        if (imgModels.length > 0) setSelectedImageModel(imgModels[0].id);
      } catch (error) {
        console.error("加载模型列表失败:", error);
      } finally {
        setLoadingModels(false);
      }
    }
    loadModels();
  }, []);

  const handleSelectHuman = () => onSelect("human");
  const handleSelectAI = () => {
    if (selectedAIModel) onSelect("ai", selectedAIModel);
    else if (aiModels.length > 0) onSelect("ai", aiModels[0].id);
  };
  const handleSelectImage = () => {
    if (selectedImageModel) onSelect("image", selectedImageModel);
    else if (imageModels.length > 0) onSelect("image", imageModels[0].id);
  };

  return (
    <div className="flex flex-col items-center justify-center min-h-screen bg-background p-4">
      <div className="w-full max-w-2xl">
        <h1 className="text-3xl font-bold text-center mb-2 text-gray-800">
          欢迎使用客服系统
        </h1>
        <p className="text-center text-gray-600 mb-8">
          请选择您需要的服务方式
        </p>

        <div className="grid grid-cols-1 md:grid-cols-3 gap-4 mb-6">
          {/* 人工客服 */}
          <Card className="p-6 cursor-pointer hover:shadow-lg transition-shadow border-2 hover:border-primary">
            <div className="flex flex-col items-center text-center">
              <div className="w-16 h-16 rounded-full bg-blue-100 flex items-center justify-center mb-4">
                <svg className="w-8 h-8 text-blue-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M16 7a4 4 0 11-8 0 4 4 0 018 0zM12 14a7 7 0 00-7 7h14a7 7 0 00-7-7z" />
                </svg>
              </div>
              <h3 className="text-xl font-semibold mb-2">人工客服</h3>
              <p className="text-sm text-gray-600 mb-4">由专业客服人员为您提供一对一服务</p>
              <Button onClick={handleSelectHuman} disabled={loading} className="w-full">
                {loading ? "连接中..." : "选择人工客服"}
              </Button>
            </div>
          </Card>

          {/* AI 客服 */}
          <Card className="p-6 cursor-pointer hover:shadow-lg transition-shadow border-2 hover:border-primary">
            <div className="flex flex-col items-center text-center">
              <div className="w-16 h-16 rounded-full bg-purple-100 flex items-center justify-center mb-4">
                <svg className="w-8 h-8 text-purple-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9.663 17h4.673M12 3v1m6.364 1.636l-.707.707M21 12h-1M4 12H3m3.343-5.657l-.707-.707m2.828 9.9a5 5 0 117.072 0l-.548.547A3.374 3.374 0 0014 18.469V19a2 2 0 11-4 0v-.531c0-.895-.356-1.754-.988-2.386l-.548-.547z" />
                </svg>
              </div>
              <h3 className="text-xl font-semibold mb-2">AI 客服</h3>
              <p className="text-sm text-gray-600 mb-4">智能 AI 助手，24 小时在线为您服务</p>
              {loadingModels ? (
                <div className="w-full py-2 text-sm text-gray-500">加载模型中...</div>
              ) : aiModels.length === 0 ? (
                <div className="w-full py-2 text-sm text-red-500">暂无可用的 AI 模型</div>
              ) : (
                <>
                  <select
                    value={selectedAIModel || ""}
                    onChange={(e) => setSelectedAIModel(Number(e.target.value))}
                    className="w-full mb-4 px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-primary"
                    disabled={loading}
                  >
                    {aiModels.map((m) => (
                      <option key={m.id} value={m.id}>{m.provider} - {m.model}{m.description ? ` (${m.description})` : ""}</option>
                    ))}
                  </select>
                  <Button onClick={handleSelectAI} disabled={loading || !selectedAIModel} variant="default" className="w-full">
                    {loading ? "连接中..." : "选择 AI 客服"}
                  </Button>
                </>
              )}
            </div>
          </Card>

          {/* 生图绘画 */}
          <Card className="p-6 cursor-pointer hover:shadow-lg transition-shadow border-2 hover:border-primary">
            <div className="flex flex-col items-center text-center">
              <div className="w-16 h-16 rounded-full bg-amber-100 flex items-center justify-center mb-4">
                <svg className="w-8 h-8 text-amber-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M4 16l4.586-4.586a2 2 0 012.828 0L16 16m-2-2l1.586-1.586a2 2 0 012.828 0L20 14m-6-6h.01M6 20h12a2 2 0 002-2V6a2 2 0 00-2-2H6a2 2 0 00-2 2v12a2 2 0 002 2z" />
                </svg>
              </div>
              <h3 className="text-xl font-semibold mb-2">生图绘画</h3>
              <p className="text-sm text-gray-600 mb-4">通过对话描述，AI 生成图片</p>
              {loadingModels ? (
                <div className="w-full py-2 text-sm text-gray-500">加载模型中...</div>
              ) : imageModels.length === 0 ? (
                <div className="w-full py-2 text-sm text-red-500">暂无可用的生图模型</div>
              ) : (
                <>
                  <select
                    value={selectedImageModel || ""}
                    onChange={(e) => setSelectedImageModel(Number(e.target.value))}
                    className="w-full mb-4 px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-primary"
                    disabled={loading}
                  >
                    {imageModels.map((m) => (
                      <option key={m.id} value={m.id}>{m.provider} - {m.model}{m.description ? ` (${m.description})` : ""}</option>
                    ))}
                  </select>
                  <Button onClick={handleSelectImage} disabled={loading || !selectedImageModel} variant="default" className="w-full">
                    {loading ? "连接中..." : "选择生图绘画"}
                  </Button>
                </>
              )}
            </div>
          </Card>
        </div>
      </div>
    </div>
  );
}