import { useEffect, useState } from 'react';
import { LockOutlined, MailOutlined, NumberOutlined, UserOutlined } from '@ant-design/icons';
import {Button, Checkbox, Form, Input, Space} from 'antd';
import { NavLink } from 'react-router';
import authApi from "../../api/authApi.ts";

interface FormValues {
    name: string;
    email: string;
    verifyCode: string;
    password: string;
    confirmPassword: string;
    agreement: boolean;
}

function Register() {
    const [countdown, setCountdown] = useState(0);
    const [form] = Form.useForm<FormValues>();
    const emailValue = Form.useWatch('email', form)

    // 
    function isValidEmail(email: string): boolean {
        const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;

        return emailRegex.test(email);
    }

    const sendVerificationCode = () => {
        // 如果邮箱校验不通过，则触发表单校验提示，并中断
        if (!isValidEmail(emailValue)) {
            form.validateFields(['email']);
            return;
        }

        // 发起 POST 请求到后端 /sendVerification
        authApi.sendVerificationCode(emailValue).catch()
        setCountdown(60);
    };

    // 发送表单倒计时
    useEffect(() => {
        if (countdown > 0) {
            const timer = setTimeout(() => {
                setCountdown(prev => prev - 1);
            }, 1000);

            return () => clearTimeout(timer);
        }
    }, [countdown]);


    // 表单提交
    const onFinish = (values: FormValues) => {
        console.log('注册成功:', values);
    };

    return (
        <Form
            form={form}
            style={{ maxWidth: 360 }}
            onFinish={onFinish}
            scrollToFirstError
        >
            <h2>注册</h2>

            <Form.Item
                name="name"
                rules={[{ required: true, message: '请输入用户名' }]}
            >
                <Input prefix={<UserOutlined />} placeholder="请输入用户名" />
            </Form.Item>

            <Form.Item
                name="email"

                rules={[{ required: true, message: '请输入邮箱' }, { type: 'email', message: '邮箱格式错误' }]}
            >
                <Input
                    prefix={<MailOutlined />}
                    placeholder="请输入邮箱"
                />
            </Form.Item>

            <Form.Item
                name="verifyCode"
                rules={[{ required: true, message: '请填写验证码' }]}
            >
                <Space direction="horizontal" size="small">
                    <Input
                        prefix={<NumberOutlined />}
                        placeholder="请输入验证码"
                        style={{ flex: 1 }}
                    />
                    <Button
                        disabled={countdown > 0}
                        onClick={sendVerificationCode}
                        color="primary"
                        style={{ width: 120 }}
                    >
                        {countdown > 0 ? `${countdown}s后重试` : '发送验证码'}
                    </Button>
                </Space>
            </Form.Item>

            <Form.Item
                name="password"
                rules={[
                    { required: true, message: '请输入密码' },
                    { min: 6, message: '密码长度至少为6位' },
                ]}
            >
                <Input.Password
                    prefix={<LockOutlined />}
                    placeholder="请输入密码"
                />
            </Form.Item>

            <Form.Item
                name="confirmPassword"
                dependencies={['password']}
                rules={[
                    { required: true, message: '请确认密码' },
                    ({ getFieldValue }) => ({
                        validator(_, value) {
                            if (!value || getFieldValue('password') === value) {
                                return Promise.resolve();
                            }
                            return Promise.reject('两次输入的密码不一致');
                        },
                    }),
                ]}
            >
                <Input.Password
                    prefix={<LockOutlined />}
                    placeholder="请确认密码"
                />
            </Form.Item>

            <Form.Item
                name="agreement"
                valuePropName="checked"
                rules={[
                    {
                        validator: (_, value) =>
                            value ? Promise.resolve() : Promise.reject('请阅读并同意用户协议'),
                    },
                ]}
            >
                <Checkbox>我已阅读并同意用户协议：<a>《创驿平台用户协议》</a></Checkbox>
            </Form.Item>

            <Form.Item>
                <Button
                    type="primary"
                    htmlType="submit"
                    style={{ width: '100%' }}
                >
                    注册
                </Button>
                或 <NavLink to='/login'>返回登录</NavLink>
            </Form.Item>
        </Form>
    );
}

export default Register;