import React, { useState } from 'react';
import { useForm } from 'react-hook-form';
import { EyeIcon, EyeSlashIcon, UserIcon, LockClosedIcon } from '@heroicons/react/24/outline';
import { useNavigate } from 'react-router-dom';
import { useAuth } from '@/client/home/hooks/AuthProvider';
import { authClient } from '@/client/api';

const RegisterPage: React.FC = () => {
  const { register, handleSubmit, watch, formState: { errors } } = useForm();
  const [showPassword, setShowPassword] = useState(false);
  const [showConfirmPassword, setShowConfirmPassword] = useState(false);
  const [loading, setLoading] = useState(false);
  const { login } = useAuth();
  const navigate = useNavigate();
  const password = watch('password', '');

  const onSubmit = async (data: any) => {
    try {
      setLoading(true);
      
      // 调用注册API
      const response = await authClient.register.$post({
        json: {
          username: data.username,
          password: data.password,
        }
      });
      
      if (response.status !== 201) {
        const result = await response.json();
        throw new Error(result.message || '注册失败');
      }
      
      // 注册成功后自动登录
      await login(data.username, data.password);
      
      // 跳转到首页
      navigate('/');
    } catch (error) {
      console.error('Registration error:', error);
      alert((error as Error).message || '注册失败，请稍后重试');
    } finally {
      setLoading(false);
    }
  };

  return (
    <div className="flex justify-center items-center min-h-screen bg-gray-100">
      <div className="w-full max-w-md bg-white rounded-lg shadow-md overflow-hidden">
        <div className="p-6 sm:p-8">
          <div className="text-center mb-8">
            <h2 className="text-2xl font-bold text-gray-900">账号注册</h2>
            <p className="mt-2 text-sm text-gray-600">创建新账号以开始使用</p>
          </div>
          
          <form onSubmit={handleSubmit(onSubmit)} className="space-y-6">
            <div>
              <label htmlFor="username" className="block text-sm font-medium text-gray-700 mb-1">
                用户名
              </label>
              <div className="relative">
                <div className="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
                  <UserIcon className="h-5 w-5 text-gray-400" />
                </div>
                <input
                  id="username"
                  type="text"
                  className={`w-full pl-10 pr-3 py-2 border ${errors.username ? 'border-red-300' : 'border-gray-300'} rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent`}
                  placeholder="请输入用户名"
                  {...register('username', { 
                    required: '用户名不能为空',
                    minLength: { value: 3, message: '用户名至少3个字符' },
                    maxLength: { value: 20, message: '用户名不能超过20个字符' }
                  })}
                />
              </div>
              {errors.username && (
                <p className="mt-1 text-sm text-red-600">{errors.username.message?.toString()}</p>
              )}
            </div>
            
            <div>
              <label htmlFor="password" className="block text-sm font-medium text-gray-700 mb-1">
                密码
              </label>
              <div className="relative">
                <div className="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
                  <LockClosedIcon className="h-5 w-5 text-gray-400" />
                </div>
                <input
                  id="password"
                  type={showPassword ? 'text' : 'password'}
                  className={`w-full pl-10 pr-10 py-2 border ${errors.password ? 'border-red-300' : 'border-gray-300'} rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent`}
                  placeholder="请输入密码"
                  {...register('password', { 
                    required: '密码不能为空',
                    minLength: { value: 6, message: '密码至少6个字符' },
                    maxLength: { value: 30, message: '密码不能超过30个字符' }
                  })}
                />
                <button 
                  type="button"
                  className="absolute inset-y-0 right-0 pr-3 flex items-center"
                  onClick={() => setShowPassword(!showPassword)}
                >
                  {showPassword ? (
                    <EyeSlashIcon className="h-5 w-5 text-gray-400" />
                  ) : (
                    <EyeIcon className="h-5 w-5 text-gray-400" />
                  )}
                </button>
              </div>
              {errors.password && (
                <p className="mt-1 text-sm text-red-600">{errors.password.message?.toString()}</p>
              )}
            </div>
            
            <div>
              <label htmlFor="confirmPassword" className="block text-sm font-medium text-gray-700 mb-1">
                确认密码
              </label>
              <div className="relative">
                <div className="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
                  <LockClosedIcon className="h-5 w-5 text-gray-400" />
                </div>
                <input
                  id="confirmPassword"
                  type={showConfirmPassword ? 'text' : 'password'}
                  className={`w-full pl-10 pr-10 py-2 border ${errors.confirmPassword ? 'border-red-300' : 'border-gray-300'} rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent`}
                  placeholder="请再次输入密码"
                  {...register('confirmPassword', { 
                    required: '请确认密码',
                    validate: value => value === password || '两次密码输入不一致'
                  })}
                />
                <button 
                  type="button"
                  className="absolute inset-y-0 right-0 pr-3 flex items-center"
                  onClick={() => setShowConfirmPassword(!showConfirmPassword)}
                >
                  {showConfirmPassword ? (
                    <EyeSlashIcon className="h-5 w-5 text-gray-400" />
                  ) : (
                    <EyeIcon className="h-5 w-5 text-gray-400" />
                  )}
                </button>
              </div>
              {errors.confirmPassword && (
                <p className="mt-1 text-sm text-red-600">{errors.confirmPassword.message?.toString()}</p>
              )}
            </div>
            
            <div>
              <button
                type="submit"
                disabled={loading}
                className="w-full flex justify-center py-2 px-4 border border-transparent rounded-md shadow-sm text-sm font-medium text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 disabled:opacity-50"
              >
                {loading ? '注册中...' : '注册'}
              </button>
            </div>
          </form>
          
          <div className="mt-6">
            <div className="relative">
              <div className="absolute inset-0 flex items-center">
                <div className="w-full border-t border-gray-300"></div>
              </div>
              <div className="relative flex justify-center text-sm">
                <span className="px-2 bg-white text-gray-500">已有账号?</span>
              </div>
            </div>
            
            <div className="mt-4">
              <button
                type="button"
                onClick={() => navigate('/login')}
                className="w-full flex justify-center py-2 px-4 border border-gray-300 rounded-md shadow-sm text-sm font-medium text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500"
              >
                返回登录
              </button>
            </div>
          </div>
        </div>
      </div>
    </div>
  );
};

export default RegisterPage;