import { StyleSheet, ScrollView, TouchableOpacity, View, Text, useColorScheme as useSystemColorScheme } from 'react-native';
import { Stack } from 'expo-router';
import { useState, useEffect, useMemo } from 'react';
import { useTheme, useSettingsActions } from '@/stores';
import { useHaptics } from '@/hooks';
import Colors from '@/constants/Colors';

export default function ThemeTestScreen() {
  const currentTheme = useTheme();
  const { setTheme } = useSettingsActions();
  const haptics = useHaptics();
  const systemColorScheme = useSystemColorScheme();

  // 强制重新渲染的状态
  const [renderKey, setRenderKey] = useState(0);

  // 直接计算实际应用的主题 - 不使用 useColorScheme hook
  const actualTheme: 'light' | 'dark' = useMemo(() => {
    return currentTheme === 'auto'
      ? (systemColorScheme === 'dark' ? 'dark' : 'light')
      : currentTheme;
  }, [currentTheme, systemColorScheme]);

  // 使用 useMemo 确保颜色对象在主题改变时重新计算
  const colors = useMemo(() => {
    console.log('🎨 Recalculating colors for theme:', actualTheme);
    return Colors[actualTheme] as Record<string, any>;
  }, [actualTheme]);

  // 监听主题变化
  useEffect(() => {
    console.log('🎨 Theme changed:', { currentTheme, systemColorScheme, actualTheme, renderKey });
    setRenderKey(prev => prev + 1);
  }, [currentTheme, systemColorScheme, actualTheme]);

  const handleThemeChange = (newTheme: 'light' | 'dark' | 'auto') => {
    haptics.selection();
    console.log('🎨 Changing theme to:', newTheme);
    setTheme(newTheme);
  };

  return (
    <>
      <Stack.Screen
        options={{
          title: '主题测试',
          headerStyle: {
            backgroundColor: colors.background,
          },
          headerTintColor: colors.text,
        }}
      />
      <ScrollView
        style={[styles.container, { backgroundColor: colors.background }]}
      >
        {/* 主题信息 */}
        <View style={[styles.section, { backgroundColor: colors.backgroundSecondary }]}>
          <Text style={[styles.title, { color: colors.text }]}>
            当前主题信息
          </Text>
          <Text style={[styles.infoText, { color: colors.textSecondary }]}>
            用户设置: {currentTheme}
          </Text>
          <Text style={[styles.infoText, { color: colors.textSecondary }]}>
            系统主题: {systemColorScheme || 'light'}
          </Text>
          <Text style={[styles.infoText, { color: colors.textSecondary }]}>
            实际应用: {actualTheme}
          </Text>
          <Text style={[styles.infoText, { color: colors.textSecondary }]}>
            渲染次数: {renderKey}
          </Text>
        </View>

        {/* 主题切换按钮 */}
        <View style={[styles.section, { backgroundColor: colors.backgroundSecondary }]}>
          <Text style={[styles.title, { color: colors.text }]}>
            切换主题
          </Text>
          <View style={styles.buttonRow}>
            <TouchableOpacity
              style={[
                styles.themeButton,
                {
                  backgroundColor: currentTheme === 'light' ? colors.primary : colors.backgroundTertiary,
                  borderColor: colors.border,
                }
              ]}
              onPress={() => handleThemeChange('light')}
            >
              <Text style={[
                styles.buttonText,
                { color: currentTheme === 'light' ? '#fff' : colors.text }
              ]}>
                ☀️ 浅色
              </Text>
            </TouchableOpacity>

            <TouchableOpacity
              style={[
                styles.themeButton,
                {
                  backgroundColor: currentTheme === 'dark' ? colors.primary : colors.backgroundTertiary,
                  borderColor: colors.border,
                }
              ]}
              onPress={() => handleThemeChange('dark')}
            >
              <Text style={[
                styles.buttonText,
                { color: currentTheme === 'dark' ? '#fff' : colors.text }
              ]}>
                🌙 深色
              </Text>
            </TouchableOpacity>

            <TouchableOpacity
              style={[
                styles.themeButton,
                {
                  backgroundColor: currentTheme === 'auto' ? colors.primary : colors.backgroundTertiary,
                  borderColor: colors.border,
                }
              ]}
              onPress={() => handleThemeChange('auto')}
            >
              <Text style={[
                styles.buttonText,
                { color: currentTheme === 'auto' ? '#fff' : colors.text }
              ]}>
                🔄 自动
              </Text>
            </TouchableOpacity>
          </View>
        </View>

        {/* 文本颜色展示 */}
        <View style={[styles.section, { backgroundColor: colors.backgroundSecondary }]}>
          <Text style={[styles.title, { color: colors.text }]}>
            文本颜色
          </Text>
          <Text style={[styles.colorText, { color: colors.text }]}>
            Primary Text - {colors.text}
          </Text>
          <Text style={[styles.colorText, { color: colors.textSecondary }]}>
            Secondary Text - {colors.textSecondary}
          </Text>
          <Text style={[styles.colorText, { color: colors.textTertiary }]}>
            Tertiary Text - {colors.textTertiary}
          </Text>
        </View>

        {/* 背景颜色展示 */}
        <View style={[styles.section, { backgroundColor: colors.backgroundSecondary }]}>
          <Text style={[styles.title, { color: colors.text }]}>
            背景颜色
          </Text>
          <View style={[styles.colorBox, { backgroundColor: colors.background }]}>
            <Text style={[styles.colorText, { color: colors.text }]}>
              Primary Background - {colors.background}
            </Text>
          </View>
          <View style={[styles.colorBox, { backgroundColor: colors.backgroundSecondary, borderWidth: 1, borderColor: colors.border }]}>
            <Text style={[styles.colorText, { color: colors.text }]}>
              Secondary Background - {colors.backgroundSecondary}
            </Text>
          </View>
          <View style={[styles.colorBox, { backgroundColor: colors.backgroundTertiary }]}>
            <Text style={[styles.colorText, { color: colors.text }]}>
              Tertiary Background - {colors.backgroundTertiary}
            </Text>
          </View>
        </View>

        {/* 主题颜色展示 */}
        <View style={[styles.section, { backgroundColor: colors.backgroundSecondary }]}>
          <Text style={[styles.title, { color: colors.text }]}>
            主题颜色
          </Text>
          <View style={styles.colorGrid}>
            <View style={[styles.colorBox, { backgroundColor: colors.primary }]}>
              <Text style={[styles.colorText, { color: '#fff' }]}>Primary - {colors.primary}</Text>
            </View>
            <View style={[styles.colorBox, { backgroundColor: colors.secondary }]}>
              <Text style={[styles.colorText, { color: '#fff' }]}>Secondary - {colors.secondary}</Text>
            </View>
            <View style={[styles.colorBox, { backgroundColor: colors.success }]}>
              <Text style={[styles.colorText, { color: '#fff' }]}>Success - {colors.success}</Text>
            </View>
            <View style={[styles.colorBox, { backgroundColor: colors.warning }]}>
              <Text style={[styles.colorText, { color: '#fff' }]}>Warning - {colors.warning}</Text>
            </View>
            <View style={[styles.colorBox, { backgroundColor: colors.error }]}>
              <Text style={[styles.colorText, { color: '#fff' }]}>Error - {colors.error}</Text>
            </View>
            <View style={[styles.colorBox, { backgroundColor: colors.info }]}>
              <Text style={[styles.colorText, { color: '#fff' }]}>Info - {colors.info}</Text>
            </View>
          </View>
        </View>

        {/* UI 元素展示 */}
        <View style={[styles.section, { backgroundColor: colors.backgroundSecondary }]}>
          <Text style={[styles.title, { color: colors.text }]}>
            UI 元素
          </Text>
          <View style={[styles.card, { backgroundColor: colors.card, borderColor: colors.border }]}>
            <Text style={[styles.cardText, { color: colors.text }]}>
              这是一个卡片组件
            </Text>
            <Text style={[styles.cardSubtext, { color: colors.textSecondary }]}>
              卡片背景色: {colors.card}
            </Text>
          </View>

          <View style={[styles.input, { backgroundColor: colors.inputBackground, borderColor: colors.inputBorder }]}>
            <Text style={[styles.inputText, { color: colors.textSecondary }]}>
              输入框样式预览
            </Text>
          </View>

          <View style={[styles.separator, { backgroundColor: colors.separator }]} />

          <TouchableOpacity style={[styles.button, { backgroundColor: colors.buttonPrimary }]}>
            <Text style={[styles.buttonText, { color: '#fff' }]}>
              按钮示例
            </Text>
          </TouchableOpacity>
        </View>
      </ScrollView>
    </>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
  },
  section: {
    margin: 16,
    padding: 16,
    borderRadius: 12,
  },
  title: {
    fontSize: 20,
    fontWeight: 'bold',
    marginBottom: 16,
  },
  infoText: {
    fontSize: 16,
    marginBottom: 8,
  },
  buttonRow: {
    flexDirection: 'row',
    gap: 12,
  },
  themeButton: {
    flex: 1,
    paddingVertical: 12,
    paddingHorizontal: 16,
    borderRadius: 8,
    borderWidth: 2,
    alignItems: 'center',
  },
  buttonText: {
    fontSize: 16,
    fontWeight: '600',
  },
  colorText: {
    fontSize: 14,
    marginBottom: 8,
    fontFamily: 'monospace',
  },
  colorBox: {
    padding: 16,
    borderRadius: 8,
    marginBottom: 8,
    alignItems: 'center',
  },
  colorGrid: {
    gap: 8,
  },
  card: {
    padding: 16,
    borderRadius: 8,
    borderWidth: 1,
    marginBottom: 12,
  },
  cardText: {
    fontSize: 16,
    fontWeight: '600',
    marginBottom: 4,
  },
  cardSubtext: {
    fontSize: 12,
    fontFamily: 'monospace',
  },
  input: {
    padding: 12,
    borderRadius: 8,
    borderWidth: 1,
    marginBottom: 12,
  },
  inputText: {
    fontSize: 14,
  },
  separator: {
    height: 1,
    marginVertical: 12,
  },
  button: {
    padding: 16,
    borderRadius: 8,
    alignItems: 'center',
  },
});