import { useEffect, useRef, useState } from 'react';
import { Pressable, StyleSheet, Text } from 'react-native';
import { colors , spacing } from '../../../src/theme';

interface Props {
  disabled?: boolean;
  onSend?: () => void;
  seconds?: number;
}

/** 获取验证码按钮：未满足前置条件置灰；点击后倒计时 Ns */
export function CountdownButton({ disabled = false, onSend, seconds = 60 }: Props) {
  const [left, setLeft] = useState(0);
  const timer = useRef<ReturnType<typeof setInterval> | null>(null);

  useEffect(() => () => {
    if (timer.current) clearInterval(timer.current);
  }, []);

  const start = () => {
    if (disabled || left > 0) return;
    setLeft(seconds);
    onSend?.();
    timer.current = setInterval(() => {
      setLeft((l) => {
        if (l <= 1) {
          if (timer.current) clearInterval(timer.current);
          return 0;
        }
        return l - 1;
      });
    }, 1000);
  };

  const counting = left > 0;
  return (
    <Pressable
      style={[styles.btn, (disabled || counting) && styles.btnDisabled]}
      onPress={start}
      disabled={disabled || counting}
    >
      <Text style={[styles.text, (disabled || counting) && styles.textDisabled]}>
        {counting ? `${left}s 后重新获取` : '获取验证码'}
      </Text>
    </Pressable>
  );
}

const styles = StyleSheet.create({
  btn: { paddingHorizontal: 14, paddingVertical: spacing.card, borderRadius: 16, backgroundColor: colors.primaryLight },
  btnDisabled: { backgroundColor: colors.borderLight },
  text: { fontSize: 13, fontWeight: '600', color: colors.primaryText },
  textDisabled: { color: colors.textDisabled },
});