"use client"

import { useState, useRef, useEffect } from 'react'
import { Button } from '@/components/ui/button'
import { Mic, MicOff, Square, Send, Trash2 } from 'lucide-react'
import { useAuth } from '@/hooks/useAuth'

interface VoiceRecorderProps {
  onSendVoice: (audioUrl: string, duration: number) => void
}

export function VoiceRecorder({ onSendVoice }: VoiceRecorderProps) {
  const { user } = useAuth()
  const [isRecording, setIsRecording] = useState(false)
  const [recordedAudio, setRecordedAudio] = useState<string | null>(null)
  const [duration, setDuration] = useState(0)
  const [isPlaying, setIsPlaying] = useState(false)
  const [permission, setPermission] = useState<'granted' | 'denied' | 'prompt'>('prompt')
  
  const mediaRecorderRef = useRef<MediaRecorder | null>(null)
  const audioChunksRef = useRef<Blob[]>([])
  const audioRef = useRef<HTMLAudioElement | null>(null)
  const intervalRef = useRef<NodeJS.Timeout | null>(null)

  useEffect(() => {
    // Проверяем доступность микрофона
    if (typeof navigator !== 'undefined' && navigator.mediaDevices) {
      navigator.permissions.query({ name: 'microphone' as PermissionName }).then((result) => {
        setPermission(result.state as 'granted' | 'denied' | 'prompt')
      }).catch(() => {
        // Если permissions API недоступен, оставляем prompt
      })
    }
  }, [])

  const startRecording = async () => {
    try {
      const stream = await navigator.mediaDevices.getUserMedia({ audio: true })
      setPermission('granted')
      
      const mediaRecorder = new MediaRecorder(stream, {
        mimeType: 'audio/webm;codecs=opus'
      })
      
      mediaRecorderRef.current = mediaRecorder
      audioChunksRef.current = []
      
      mediaRecorder.ondataavailable = (event) => {
        if (event.data.size > 0) {
          audioChunksRef.current.push(event.data)
        }
      }
      
      mediaRecorder.onstop = () => {
        const audioBlob = new Blob(audioChunksRef.current, { type: 'audio/webm' })
        const audioUrl = URL.createObjectURL(audioBlob)
        setRecordedAudio(audioUrl)
        
        // Останавливаем все треки для освобождения микрофона
        stream.getTracks().forEach(track => track.stop())
        
        // Останавливаем таймер
        if (intervalRef.current) {
          clearInterval(intervalRef.current)
          intervalRef.current = null
        }
      }
      
      mediaRecorder.start()
      setIsRecording(true)
      setDuration(0)
      
      // Запускаем таймер записи
      intervalRef.current = setInterval(() => {
        setDuration(prev => prev + 1)
      }, 1000)
      
    } catch (error) {
      console.error('Error accessing microphone:', error)
      setPermission('denied')
    }
  }

  const stopRecording = () => {
    if (mediaRecorderRef.current && isRecording) {
      mediaRecorderRef.current.stop()
      setIsRecording(false)
    }
  }

  const cancelRecording = () => {
    if (mediaRecorderRef.current && isRecording) {
      mediaRecorderRef.current.stop()
      setIsRecording(false)
    }
    setRecordedAudio(null)
    setDuration(0)
    
    if (intervalRef.current) {
      clearInterval(intervalRef.current)
      intervalRef.current = null
    }
  }

  const playRecording = () => {
    if (recordedAudio) {
      if (audioRef.current) {
        audioRef.current.pause()
        audioRef.current.currentTime = 0
      }
      
      audioRef.current = new Audio(recordedAudio)
      audioRef.current.play()
      setIsPlaying(true)
      
      audioRef.current.onended = () => {
        setIsPlaying(false)
      }
    }
  }

  const sendVoiceMessage = async () => {
    if (!recordedAudio || !user?.id) return

    try {
      // Конвертируем Blob в File для загрузки
      const response = await fetch(recordedAudio)
      const blob = await response.blob()
      const file = new File([blob], `voice-${Date.now()}.webm`, { type: 'audio/webm' })
      
      // Загружаем в S3
      const formData = new FormData()
      formData.append('file', file)
      formData.append('userId', user.id)
      
      const uploadResponse = await fetch('/api/upload-voice', {
        method: 'POST',
        body: formData
      })
      
      if (!uploadResponse.ok) {
        throw new Error('Failed to upload voice message')
      }
      
      const result = await uploadResponse.json()
      
      // Отправляем голосовое сообщение
      onSendVoice(result.url, duration)
      
      // Очищаем состояние
      setRecordedAudio(null)
      setDuration(0)
      
    } catch (error) {
      console.error('Error sending voice message:', error)
    }
  }

  const formatDuration = (seconds: number) => {
    const mins = Math.floor(seconds / 60)
    const secs = seconds % 60
    return `${mins}:${secs.toString().padStart(2, '0')}`
  }

  if (permission === 'denied') {
    return (
      <div className="text-white/60 text-xs text-center p-2">
        Доступ к микрофону запрещен
      </div>
    )
  }

  return (
    <div className="flex items-center space-x-2">
      {!recordedAudio ? (
        // Состояние записи
        <>
          {!isRecording ? (
            <Button
              type="button"
              variant="ghost"
              size="sm"
              onClick={startRecording}
              className="text-white/60 hover:text-white hover:bg-white/10 p-2"
            >
              <Mic className="h-4 w-4" />
            </Button>
          ) : (
            <>
              <div className="flex items-center space-x-2 bg-red-500/20 rounded-lg px-3 py-2">
                <div className="w-2 h-2 bg-red-500 rounded-full animate-pulse" />
                <span className="text-white text-sm font-mono">
                  {formatDuration(duration)}
                </span>
                <Button
                  type="button"
                  variant="ghost"
                  size="sm"
                  onClick={stopRecording}
                  className="text-white/80 hover:text-white p-1"
                >
                  <Square className="h-3 w-3" />
                </Button>
                <Button
                  type="button"
                  variant="ghost"
                  size="sm"
                  onClick={cancelRecording}
                  className="text-red-400 hover:text-red-300 p-1"
                >
                  <Trash2 className="h-3 w-3" />
                </Button>
              </div>
            </>
          )}
        </>
      ) : (
        // Состояние воспроизведения и отправки
        <div className="flex items-center space-x-2 bg-blue-500/20 rounded-lg px-3 py-2">
          <Button
            type="button"
            variant="ghost"
            size="sm"
            onClick={playRecording}
            className="text-blue-300 hover:text-blue-200 p-1"
          >
            {isPlaying ? <MicOff className="h-3 w-3" /> : <Mic className="h-3 w-3" />}
          </Button>
          <span className="text-white text-sm font-mono">
            {formatDuration(duration)}
          </span>
          <Button
            type="button"
            variant="ghost"
            size="sm"
            onClick={sendVoiceMessage}
            className="text-green-400 hover:text-green-300 p-1"
          >
            <Send className="h-3 w-3" />
          </Button>
          <Button
            type="button"
            variant="ghost"
            size="sm"
            onClick={() => setRecordedAudio(null)}
            className="text-red-400 hover:text-red-300 p-1"
          >
            <Trash2 className="h-3 w-3" />
          </Button>
        </div>
      )}
    </div>
  )
}