import { ThemedText } from '@/components/ThemedText';
import { ThemedView } from '@/components/ThemedView';
import { useColorScheme } from '@/hooks/useColorScheme';
import { useThemeColor } from '@/hooks/useThemeColor';
import AsyncStorage from '@react-native-async-storage/async-storage';
import { router } from 'expo-router';
import React from 'react';
import {
  Dimensions,
  StatusBar,
  StyleSheet,
  Text,
  TouchableOpacity,
  View
} from 'react-native';

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

export default function WelcomeScreen() {
  const colorScheme = useColorScheme();
  const backgroundColor = useThemeColor({}, 'background');
  const primaryColor = useThemeColor({}, 'primary');
  const textColor = useThemeColor({}, 'text');

  const handleGetStarted = () => {
    router.push('/onboarding/personal-info');
  };

  const handleSkip = async () => {
    try {
      await AsyncStorage.setItem('@onboarding_completed', 'true');
      router.replace('/(tabs)');
    } catch (error) {
      console.error('保存引导状态失败:', error);
      router.replace('/(tabs)');
    }
  };

  return (
    <ThemedView style={[styles.container, { backgroundColor }]}>
      <StatusBar
        barStyle={'dark-content'}
        backgroundColor={backgroundColor}
      />

      {/* 跳过按钮 */}
      <TouchableOpacity style={styles.skipButton} onPress={handleSkip}>
        <ThemedText style={[styles.skipText, { color: textColor }]}>
          跳过
        </ThemedText>
      </TouchableOpacity>

      {/* 主要内容区域 */}
      <View style={styles.contentContainer}>
        {/* Logo 或插图区域 */}
        <View style={styles.imageContainer}>
          <View style={[styles.logoPlaceholder, { backgroundColor: primaryColor }]}>
            <Text style={styles.logoText}>🧘‍♀️</Text>
          </View>
        </View>

        {/* 标题和描述 */}
        <View style={styles.textContainer}>
          <ThemedText type="title" style={styles.title}>
            欢迎来到数字普拉提
          </ThemedText>
          <ThemedText style={[styles.subtitle, { color: textColor + '90' }]}>
            让我们一起开始您的健康之旅{'\n'}
            个性化的普拉提体验正等着您
          </ThemedText>
        </View>

        {/* 特色功能点 */}
        <View style={styles.featuresContainer}>
          {[
            { icon: '📊', title: '个性化训练', desc: '根据您的身体状况定制训练计划' },
            { icon: '🤖', title: 'AI 姿态分析', desc: '实时纠正您的动作姿态' },
            { icon: '📈', title: '进度追踪', desc: '记录您的每一次进步' },
          ].map((feature, index) => (
            <View key={index} style={styles.featureItem}>
              <Text style={styles.featureIcon}>{feature.icon}</Text>
              <View style={styles.featureTextContainer}>
                <ThemedText style={[styles.featureTitle, { color: textColor }]}>
                  {feature.title}
                </ThemedText>
                <ThemedText style={[styles.featureDesc, { color: textColor + '70' }]}>
                  {feature.desc}
                </ThemedText>
              </View>
            </View>
          ))}
        </View>
      </View>

      {/* 底部按钮 */}
      <View style={styles.buttonContainer}>
        <TouchableOpacity
          style={[styles.getStartedButton, { backgroundColor: primaryColor }]}
          onPress={handleGetStarted}
          activeOpacity={0.8}
        >
          <Text style={styles.getStartedButtonText}>开始体验</Text>
        </TouchableOpacity>

        <TouchableOpacity style={styles.laterButton} onPress={handleSkip}>
          <ThemedText style={[styles.laterButtonText, { color: textColor + '70' }]}>
            稍后再说
          </ThemedText>
        </TouchableOpacity>
      </View>
    </ThemedView>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    paddingTop: StatusBar.currentHeight || 44,
  },
  skipButton: {
    position: 'absolute',
    top: StatusBar.currentHeight ? StatusBar.currentHeight + 16 : 60,
    right: 20,
    zIndex: 10,
    padding: 8,
  },
  skipText: {
    fontSize: 16,
    fontWeight: '500',
  },
  contentContainer: {
    flex: 1,
    paddingHorizontal: 24,
    justifyContent: 'center',
  },
  imageContainer: {
    alignItems: 'center',
    marginBottom: 40,
  },
  logoPlaceholder: {
    width: 120,
    height: 120,
    borderRadius: 60,
    justifyContent: 'center',
    alignItems: 'center',
    shadowColor: '#000',
    shadowOffset: {
      width: 0,
      height: 4,
    },
    shadowOpacity: 0.1,
    shadowRadius: 8,
    elevation: 8,
  },
  logoText: {
    fontSize: 48,
  },
  textContainer: {
    alignItems: 'center',
    marginBottom: 48,
  },
  title: {
    textAlign: 'center',
    marginBottom: 16,
    fontWeight: '700',
  },
  subtitle: {
    fontSize: 16,
    textAlign: 'center',
    lineHeight: 24,
    paddingHorizontal: 12,
  },
  featuresContainer: {
    marginBottom: 40,
  },
  featureItem: {
    flexDirection: 'row',
    alignItems: 'center',
    marginBottom: 24,
    paddingHorizontal: 8,
  },
  featureIcon: {
    fontSize: 32,
    marginRight: 16,
    width: 40,
    textAlign: 'center',
  },
  featureTextContainer: {
    flex: 1,
  },
  featureTitle: {
    fontSize: 18,
    fontWeight: '600',
    marginBottom: 4,
  },
  featureDesc: {
    fontSize: 14,
    lineHeight: 20,
  },
  buttonContainer: {
    paddingHorizontal: 24,
    paddingBottom: 48,
  },
  getStartedButton: {
    height: 56,
    borderRadius: 16,
    justifyContent: 'center',
    alignItems: 'center',
    marginBottom: 16,
    shadowColor: '#000',
    shadowOffset: {
      width: 0,
      height: 2,
    },
    shadowOpacity: 0.1,
    shadowRadius: 4,
    elevation: 4,
  },
  getStartedButtonText: {
    color: '#192126',
    fontSize: 18,
    fontWeight: '600',
  },
  laterButton: {
    height: 48,
    justifyContent: 'center',
    alignItems: 'center',
  },
  laterButtonText: {
    fontSize: 16,
    fontWeight: '500',
  },
});
