import { useState } from 'react';
import { useNavigate } from 'react-router-dom';
import { apiClient } from '@/shared/api/serverClient';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label';
import { Card, CardContent, CardDescription, CardFooter, CardHeader, CardTitle } from '@/components/ui/card';
import { toast } from 'sonner';

export default function Register() {
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');
  const [fullName, setFullName] = useState('');
  const [loading, setLoading] = useState(false);
  const navigate = useNavigate();

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setLoading(true);
    try {
      await apiClient.post('/auth/register', {
        email,
        password,
        full_name: fullName,
      });
      toast.success('注册成功，请登录');
      navigate('/login');
    } catch (error: any) {
      const detail = error.response?.data?.detail;
      // 处理 Pydantic 验证错误（数组格式）
      if (Array.isArray(detail)) {
        const messages = detail.map((err: any) => err.msg || err.message || JSON.stringify(err)).join('; ');
        toast.error(messages || '注册失败');
      } else if (typeof detail === 'object') {
        toast.error(detail.msg || detail.message || JSON.stringify(detail));
      } else {
        toast.error(detail || '注册失败');
      }
    } finally {
      setLoading(false);
    }
  };

  return (
    <div className="min-h-screen flex items-center justify-center bg-background px-4">
      <Card className="w-full max-w-md">
        <CardHeader className="space-y-1">
          <CardTitle className="text-2xl font-bold text-center">注册账号</CardTitle>
          <CardDescription className="text-center">创建一个新账号开始使用</CardDescription>
        </CardHeader>
        <CardContent>
          <form onSubmit={handleSubmit} className="space-y-4">
            <div className="space-y-2">
              <Label htmlFor="fullName">姓名</Label>
              <Input 
                id="fullName" 
                placeholder="您的姓名" 
                value={fullName}
                onChange={(e) => setFullName(e.target.value)}
                required 
              />
            </div>
            <div className="space-y-2">
              <Label htmlFor="email">邮箱</Label>
              <Input 
                id="email" 
                type="email" 
                placeholder="name@example.com" 
                value={email}
                onChange={(e) => setEmail(e.target.value)}
                required 
              />
            </div>
            <div className="space-y-2">
              <Label htmlFor="password">密码</Label>
              <Input 
                id="password" 
                type="password" 
                value={password}
                onChange={(e) => setPassword(e.target.value)}
                required 
              />
            </div>
            <Button type="submit" className="w-full" disabled={loading}>
              {loading ? '注册中...' : '注册'}
            </Button>
          </form>
        </CardContent>
        <CardFooter>
            <div className="text-sm text-center text-gray-500 w-full">
                已有账号？ <span className="text-blue-600 cursor-pointer hover:underline" onClick={() => navigate('/login')}>直接登录</span>
            </div>
        </CardFooter>
      </Card>
    </div>
  );
}