import React, { useEffect, useState } from 'react';
import { View, Text, Image, StyleSheet, TouchableOpacity, Dimensions, Platform, Alert } from 'react-native';
import { LinearGradient } from 'expo-linear-gradient';
import { useRouter } from 'expo-router';
import * as WebBrowser from 'expo-web-browser';
import { useTranslation } from 'react-i18next';
import { SafeAreaView } from 'react-native-safe-area-context';
import { setConsentAccepted, getConsentAccepted } from '../../src/storage/appStorage';

const { width, height } = Dimensions.get('window');

export default function SplashScreen() {
  const router = useRouter();
  const { t } = useTranslation();
  const [showConsent, setShowConsent] = useState(false);

  useEffect(() => {
    checkConsent();
  }, []);

  const checkConsent = async () => {
    const accepted = await getConsentAccepted();
    setShowConsent(!accepted);
    if (accepted) {
        // 如果已经同意过，直接跳转到首页分发
        // 注意：这里需要与 app/index.tsx 配合，如果 app/index.tsx 已经判断了 consent=true 不会跳过来，
        // 那么这里其实是防守。
        // 但如果用户是通过 deep link 或其他方式强制进入 splash，这个逻辑会把他们送走。
        router.replace('/');
    }
  };

  const handleAgree = async () => {
    await setConsentAccepted(true);
    setShowConsent(false);
    router.replace('/');
  };

  const openLink = async (url: string) => {
    try {
      await WebBrowser.openBrowserAsync(url);
    } catch (error) {
      Alert.alert(t('common.error'), t('common.openLinkError'));
    }
  };

  return (
    <View style={styles.container}>
      <Image
        source={require('../../assets/images/index/index_flowers.png')}
        style={styles.image}
        resizeMode="contain"
      />

      <View style={styles.contentContainer}>
        <Text style={styles.title}>{t('consent.title')}</Text>
        <Text style={styles.subtitle}>{t('consent.subtitle')}</Text>
      </View>

      <SafeAreaView style={styles.bottomContainer} edges={['bottom']}>
        {showConsent && (
          <>
            <TouchableOpacity onPress={handleAgree} activeOpacity={0.8}>
              <LinearGradient
                colors={['#F69F7B', '#F99CC0']}
                start={{ x: 0, y: 0 }}
                end={{ x: 1, y: 0 }}
                style={styles.button}
              >
                <Text style={styles.buttonText}>{t('consent.agree')}</Text>
              </LinearGradient>
            </TouchableOpacity>

            <View style={styles.linksContainer}>
              <TouchableOpacity onPress={() => openLink('https://example.com/privacy')}>
                <Text style={styles.linkText}>{t('consent.privacy')}</Text>
              </TouchableOpacity>
              <View style={styles.divider} />
              <TouchableOpacity onPress={() => openLink('https://example.com/terms')}>
                <Text style={styles.linkText}>{t('consent.terms')}</Text>
              </TouchableOpacity>
            </View>
          </>
        )}
      </SafeAreaView>
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#FFF9F0', // 假设的背景色，根据图片调整
    alignItems: 'center',
  },
  image: {
    width: width * 0.8,
    height: height * 0.5,
    marginTop: height * 0.1,
  },
  contentContainer: {
    alignItems: 'center',
    marginTop: 20,
    paddingHorizontal: 30,
  },
  title: {
    fontSize: 24,
    fontWeight: 'bold',
    color: '#4A3427', // 深褐色
    marginBottom: 10,
    textAlign: 'center',
    fontFamily: Platform.OS === 'ios' ? 'Georgia' : 'serif', // 尝试匹配衬线体
  },
  subtitle: {
    fontSize: 18,
    fontWeight: 'bold',
    color: '#4A3427', // 深褐色
    textAlign: 'center',
    lineHeight: 24,
    fontFamily: Platform.OS === 'ios' ? 'Georgia' : 'serif',
  },
  bottomContainer: {
    position: 'absolute',
    bottom: 0,
    width: '100%',
    alignItems: 'center',
    paddingBottom: 20,
  },
  button: {
    width: width * 0.8,
    paddingVertical: 16,
    borderRadius: 30,
    alignItems: 'center',
    justifyContent: 'center',
    marginBottom: 20,
    shadowColor: '#F69F7B',
    shadowOffset: { width: 0, height: 4 },
    shadowOpacity: 0.3,
    shadowRadius: 8,
    elevation: 5,
  },
  buttonText: {
    color: '#FFF',
    fontSize: 18,
    fontWeight: '600',
  },
  linksContainer: {
    flexDirection: 'row',
    alignItems: 'center',
    marginBottom: 10,
  },
  linkText: {
    fontSize: 12,
    color: '#999',
    textDecorationLine: 'underline',
  },
  divider: {
    width: 1,
    height: 12,
    backgroundColor: '#CCC',
    marginHorizontal: 15,
  },
});
