frontend/src/screens/auth/RegisterStep1Email.tsx

/**
 * 注册步骤1：输入邮箱
 * 包含邮箱输入框和获取验证码按钮
 */

import React, { useState } from 'react';
import {
  View,
  Text,
  StyleSheet,
  TextInput,
  TouchableOpacity,
} from 'react-native';
import { MaterialCommunityIcons } from '@expo/vector-icons';
import { useAppColors, type AppColors } from '../../theme';
import { RegisterStepProps } from './types';

export const RegisterStep1Email: React.FC<RegisterStepProps> = ({
  formData,
  updateFormData,
  onNext,
  colors: propColors,
  sendingCode,
  countdown,
  onSendCode,
}) => {
  const colors = propColors || useAppColors();
  const styles = createStyles(colors);

  const [emailError, setEmailError] = useState('');

  const validateEmail = (email: string): boolean => {
    if (!email.trim()) {
      setEmailError('请输入邮箱');
      return false;
    }
    if (!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email)) {
      setEmailError('请输入正确的邮箱地址');
      return false;
    }
    setEmailError('');
    return true;
  };

  const handleSendCode = async () => {
    if (!validateEmail(formData.email)) {
      return;
    }
    if (onSendCode) {
      const success = await onSendCode(formData.email);
      if (success) {
        onNext();
      }
    }
  };

  return (
    <View style={styles.container}>
      <View style={styles.formSection}>
        {/* 邮箱输入框 */}
        <View style={styles.inputContainer}>
          <Text style={styles.inputLabel}>邮箱</Text>
          <View
            style={[
              styles.inputWrapper,
              emailError ? styles.inputWrapperError : null,
            ]}
          >
            <TextInput
              style={styles.input}
              placeholder="请输入邮箱地址"
              placeholderTextColor={colors.text?.hint || '#999'}
              value={formData.email}
              onChangeText={(text) => {
                updateFormData({ email: text });
                if (emailError) setEmailError('');
              }}
              autoCapitalize="none"
              autoCorrect={false}
              keyboardType="email-address"
              editable={!sendingCode}
            />
            {formData.email.length > 0 &&
              /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(formData.email) && (
                <MaterialCommunityIcons
                  name="check-circle"
                  size={20}
                  color={colors.primary.main}
                  style={styles.checkIcon}
                />
              )}
          </View>
          {emailError ? (
            <Text style={styles.errorText}>{emailError}</Text>
          ) : null}
        </View>

        {/* 获取验证码按钮 */}
        <TouchableOpacity
          style={[
            styles.actionButton,
            (sendingCode || (countdown ?? 0) > 0) && styles.actionButtonDisabled,
          ]}
          onPress={handleSendCode}
          disabled={sendingCode || (countdown ?? 0) > 0}
          activeOpacity={0.9}
        >
          <Text style={styles.actionButtonText}>
            {sendingCode
              ? '发送中...'
              : (countdown ?? 0) > 0
              ? `${countdown}秒后重试`
              : '获取验证码'}
          </Text>
        </TouchableOpacity>
      </View>
    </View>
  );
}

function createStyles(colors: AppColors) {
  return StyleSheet.create({
    container: {
      flex: 1,
      paddingTop: 20,
    },
    formSection: {
      marginBottom: 24,
    },
    inputContainer: {
      marginBottom: 24,
    },
    inputLabel: {
      fontSize: 14,
      fontWeight: '500',
      color: colors.text?.secondary || '#666',
      marginBottom: 10,
    },
    inputWrapper: {
      flexDirection: 'row',
      alignItems: 'center',
      backgroundColor: colors.background.default,
      borderRadius: 14,
      paddingHorizontal: 18,
      height: 56,
      borderWidth: 1,
      borderColor: 'transparent',
    },
    inputWrapperError: {
      borderColor: colors.error?.main || '#FF4444',
    },
    input: {
      flex: 1,
      fontSize: 16,
      color: colors.text?.primary || '#333',
      height: 56,
    },
    checkIcon: {
      marginLeft: 8,
    },
    errorText: {
      fontSize: 12,
      color: colors.error?.main || '#FF4444',
      marginTop: 6,
      marginLeft: 4,
    },
    actionButton: {
      height: 56,
      borderRadius: 14,
      backgroundColor: colors.primary.main,
      alignItems: 'center',
      justifyContent: 'center',
      marginTop: 8,
    },
    actionButtonDisabled: {
      opacity: 0.6,
    },
    actionButtonText: {
      fontSize: 17,
      fontWeight: '600',
      color: colors.text.inverse,
    },
  });
}

export default RegisterStep1Email;