import React, { useState, useRef, useEffect } from 'react';
import {
  View,
  StyleSheet,
  TouchableOpacity,
  Pressable,
  LayoutChangeEvent,
  Share,
  Alert,
  Clipboard,
  Platform,
} from 'react-native';
import { useTheme } from '~/features/theme/ThemeProvider';
import { useTranslation } from 'react-i18next';
import { useToast } from '~/features/toast/contexts/ToastContext';
import Icon from '~/components/atoms/Icon';
import Text from '~/components/atoms/Text';
import { useAudioPlayer } from '~/features/audioPlayer/useAudioPlayer';

interface AudioPlayerProps {
  audioUri: string;
  headlineText: string;
  dateText: string;
  durationText?: string;
  fileSizeBytes?: number;
  onDelete?: () => void;
  onPlayStatusChange?: (isPlaying: boolean) => void;
  showCopyButton?: boolean; // New prop to control copy button visibility
}

function AudioPlayer({
  audioUri,
  headlineText,
  dateText,
  durationText,
  fileSizeBytes,
  onDelete,
  onPlayStatusChange,
  showCopyButton = true, // Default to true to maintain existing behavior
}: AudioPlayerProps) {
  const { isDark, themeVariant } = useTheme();
  const { t } = useTranslation();
  const { showSuccess, showError } = useToast();
  const [timelineWidth, setTimelineWidth] = useState(0);
  const [containerWidth, setContainerWidth] = useState(0);
  const timelineRef = useRef<View>(null);

  // Audio-Player-Hook für die Wiedergabe
  const {
    isPlaying,
    duration,
    currentTime,
    status,
    error,
    loadError,
    loadSound,
    playPause,
    stop,
    seek,
    formattedPosition,
    formattedDuration,
    percentComplete,
  } = useAudioPlayer();

  // Lade den Sound, wenn sich die URI ändert
  useEffect(() => {
    if (audioUri) {
      loadSound(audioUri);
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [audioUri]);

  // Benachrichtige über Wiedergabestatus, wenn sich isPlaying ändert
  // Verwende einen Ref, um zu verhindern, dass der Callback bei jedem Render aufgerufen wird
  const prevIsPlayingRef = useRef(isPlaying);

  useEffect(() => {
    // Nur aufrufen, wenn sich der Status tatsächlich geändert hat
    if (prevIsPlayingRef.current !== isPlaying) {
      prevIsPlayingRef.current = isPlaying;
      onPlayStatusChange?.(isPlaying);
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [isPlaying]);

  const handleTimelinePress = (event: any) => {
    if (loadError || timelineWidth <= 0 || duration <= 0) {
      return;
    }

    const locationX = event.nativeEvent.locationX;
    const percentage = Math.max(0, Math.min(1, locationX / timelineWidth));
    const newPosition = Math.round(percentage * duration * 1000);

    seek(newPosition);
  };

  const handleTimelineLayout = (event: LayoutChangeEvent) => {
    const newWidth = event.nativeEvent.layout.width;
    setTimelineWidth(newWidth);
  };

  const handleContainerLayout = (event: LayoutChangeEvent) => {
    const newWidth = event.nativeEvent.layout.width;
    setContainerWidth(newWidth);
  };

  const handleShare = async () => {
    try {
      await Share.share({
        url: audioUri,
        message: `${headlineText} - ${dateText}`,
      });
      console.debug('Share opened successfully');
    } catch (error) {
      console.debug('Error sharing:', error);
    }
  };

  const handleCopyLink = async () => {
    try {
      await Clipboard.setString(audioUri);
      console.debug('Link copied to clipboard:', audioUri);
      showSuccess(t('memo.audio_link_copied', 'Link copied!'));
    } catch (error) {
      console.debug('Error copying link:', error);
      showError(t('memo.audio_link_copy_error', 'Link could not be copied.'));
    }
  };

  const handleDeletePress = () => {
    Alert.alert(
      t('memo.delete_audio_title', 'Delete Audio Recording'),
      t(
        'memo.delete_audio_confirmation',
        'Do you really want to delete this audio recording? This action cannot be undone.'
      ),
      [
        {
          text: t('common.cancel', 'Cancel'),
          style: 'cancel',
        },
        {
          text: t('common.delete', 'Delete'),
          onPress: () => {
            if (onDelete) {
              onDelete();
            }
          },
          style: 'destructive',
        },
      ],
      { cancelable: true }
    );
  };

  const handleShowFile = () => {
    console.debug('Show file:', audioUri);
  };

  // Formatiere Dateigröße in menschenlesbares Format
  const formatFileSize = (bytes?: number): string => {
    if (!bytes) return '';

    const units = ['B', 'KB', 'MB', 'GB'];
    let size = bytes;
    let unitIndex = 0;

    while (size >= 1024 && unitIndex < units.length - 1) {
      size /= 1024;
      unitIndex++;
    }

    return `${size.toFixed(unitIndex > 0 ? 1 : 0)} ${units[unitIndex]}`;
  };

  // Import colors for consistent theme access
  const colors = require('~/tailwind.config.js').theme.extend.colors;
  
  // Get colors from the theme system (same as MemoPreview)
  const textColor = isDark 
    ? colors.dark?.[themeVariant]?.text || '#FFFFFF'
    : colors[themeVariant]?.text || '#000000';
    
  // Container background (like MemoPreview contentBackground)
  const backgroundColor = isDark 
    ? colors.dark?.[themeVariant]?.contentBackground 
    : colors[themeVariant]?.contentBackground;
    
  // Border color (same as MemoPreview)
  const borderColor = isDark
    ? colors.dark?.[themeVariant]?.border || '#424242'
    : colors[themeVariant]?.border || '#e6e6e6';
    
  // Inner container background (secondary button color)
  const innerBackgroundColor = isDark 
    ? colors.dark?.[themeVariant]?.secondaryButton 
    : colors[themeVariant]?.secondaryButton;
    
  // Inner border color 
  const innerBorderColor = isDark
    ? colors.dark?.[themeVariant]?.border || '#424242'
    : colors[themeVariant]?.border || '#e6e6e6';
    
  const primaryColor = isDark
    ? colors.dark?.[themeVariant]?.primary
    : colors[themeVariant]?.primary;

  const styles = StyleSheet.create({
    container: {
      backgroundColor,
      borderColor,
      borderWidth: 1,
      borderRadius: 16, // Same as MemoPreview
      padding: 16,
    },
    headerContainer: {
      marginBottom: 16,
      paddingRight: 80,
    },
    headlineContainer: {
      flexDirection: 'row',
      alignItems: 'center',
    },
    headlineText: {
      fontSize: 16,
      fontWeight: 'bold',
      marginLeft: 8,
      color: textColor,
      flex: 1,
    },
    dateText: {
      fontSize: 14,
      fontWeight: '500',
      color: isDark ? 'rgba(255, 255, 255, 0.8)' : 'rgba(0, 0, 0, 0.8)',
      marginTop: 12,
      marginLeft: 32,
    },
    metaText: {
      fontSize: 14,
      fontWeight: '500',
      color: isDark ? 'rgba(255, 255, 255, 0.8)' : 'rgba(0, 0, 0, 0.8)',
      marginTop: 4,
      marginLeft: 32,
    },
    timelineContainer: {
      marginBottom: 12,
    },
    timeline: {
      height: 8,
      borderRadius: 4,
      backgroundColor: isDark ? 'rgba(255, 255, 255, 0.1)' : 'rgba(0, 0, 0, 0.1)',
      overflow: 'hidden',
    },
    progress: {
      height: '100%',
      backgroundColor: primaryColor,
    },
    controls: {
      flexDirection: 'row',
      justifyContent: 'space-between',
      alignItems: 'center',
      marginTop: 8,
    },
    scrubber: {
      position: 'absolute',
      top: -6,
      width: 20,
      height: 20,
      borderRadius: 10,
      backgroundColor: primaryColor,
      borderWidth: 3,
      borderColor,
      transform: [{ translateX: -10 }], // Zentriere den Scrubber
    },
    controlButton: {
      flexDirection: 'row',
      alignItems: 'center',
    },
    timestamp: {
      fontSize: 16,
      fontWeight: 'bold',
      color: textColor,
    },
    contentContainer: {
      backgroundColor: isDark ? 'rgba(20, 20, 20, 0.8)' : 'rgba(235, 235, 235, 0.8)',
      borderColor: innerBorderColor,
      borderWidth: 1,
      borderRadius: 8,
      padding: 12,
      marginTop: 8,
    },
    shareButtonContainer: {
      position: 'absolute',
      top: 8,
      right: 8,
      zIndex: 1,
      flexDirection: 'row',
      backgroundColor: isDark ? 'rgba(0, 0, 0, 0.3)' : 'rgba(255, 255, 255, 0.3)',
      borderRadius: 8,
    },
    actionButton: {
      padding: 8,
      marginLeft: 4,
    },
  });

  return (
    <View style={styles.container} onLayout={handleContainerLayout}>
      <View style={styles.shareButtonContainer}>
        <Pressable style={styles.actionButton} onPress={handleShare}>
          <Icon
            name={Platform.OS === 'android' ? 'share-social-outline' : 'share-outline'}
            size={20}
            color={textColor}
          />
        </Pressable>
        {showCopyButton && (
          <Pressable style={styles.actionButton} onPress={handleCopyLink}>
            <Icon name="copy-outline" size={20} color={textColor} />
          </Pressable>
        )}
        {onDelete && (
          <Pressable style={styles.actionButton} onPress={handleDeletePress}>
            <Icon name="trash-outline" size={20} color={textColor} />
          </Pressable>
        )}
      </View>

      <View style={styles.headerContainer}>
        <View style={styles.headlineContainer}>
          <Icon name="mic-outline" size={24} color={textColor} />
          <Text style={styles.headlineText}>{headlineText}</Text>
        </View>
        {dateText && <Text style={styles.dateText}>{dateText}</Text>}
        {(durationText || fileSizeBytes) && (
          <Text style={styles.metaText}>
            {[durationText, formatFileSize(fileSizeBytes)].filter(Boolean).join(' • ')}
          </Text>
        )}
      </View>

      <View style={styles.contentContainer}>
        <View style={styles.timelineContainer}>
          <TouchableOpacity
            ref={timelineRef}
            style={[styles.timeline, loadError && { opacity: 0.5 }]}
            onPress={handleTimelinePress}
            onLayout={handleTimelineLayout}
            activeOpacity={0.8}
            disabled={loadError}>
            <View style={[styles.progress, { width: `${percentComplete}%` }]} />
            <View style={[styles.scrubber, { left: `${percentComplete}%` }]} />
          </TouchableOpacity>
        </View>
        <View style={styles.controls}>
          <Text style={styles.timestamp}>{loadError ? '--:--' : formattedPosition}</Text>
          <TouchableOpacity
            onPress={playPause}
            style={[styles.controlButton, loadError && { opacity: 0.5 }]}
            disabled={loadError}>
            <Icon name={isPlaying ? 'pause-outline' : 'play-outline'} size={32} color={textColor} />
          </TouchableOpacity>
          <Text style={styles.timestamp}>{loadError ? '--:--' : formattedDuration}</Text>
        </View>
      </View>
    </View>
  );
}

export default AudioPlayer;