player/src/components/controls/VolumeControl.tsx

import React, { useState, useRef, useCallback } from 'react'
import { usePlayerContext } from '../../contexts/PlayerContext'
import { VolumeUpIcon, VolumeDownIcon, VolumeMuteIcon } from '../../icons'
import './VolumeControl.css'

export const VolumeControl: React.FC = () => {
  const { videoState, setVolume, toggleMute } = usePlayerContext()
  const [showSlider, setShowSlider] = useState(false)
  const timeoutRef = useRef<number>()

  const handleMouseEnter = useCallback(() => {
    if (timeoutRef.current) {
      window.clearTimeout(timeoutRef.current)
    }
    setShowSlider(true)
  }, [])

  const handleMouseLeave = useCallback(() => {
    timeoutRef.current = window.setTimeout(() => {
      setShowSlider(false)
    }, 300)
  }, [])

  const handleSliderChange = useCallback(
    (e: React.ChangeEvent<HTMLInputElement>) => {
      const volume = parseFloat(e.target.value)
      setVolume(volume)
    },
    [setVolume]
  )

  const VolumeIcon = videoState.muted ? VolumeMuteIcon : videoState.volume > 0.5 ? VolumeUpIcon : VolumeDownIcon

  return (
    <div
      className="volume-control"
      onMouseEnter={handleMouseEnter}
      onMouseLeave={handleMouseLeave}
    >
      <button
        className="control-button volume-button"
        onClick={toggleMute}
        aria-label={videoState.muted ? 'Unmute' : 'Mute'}
        title={videoState.muted ? 'Unmute (M)' : 'Mute (M)'}
      >
        <VolumeIcon size={24} color="var(--player-text)" />
      </button>

      <div className={`volume-slider-container ${showSlider ? 'visible' : ''}`}>
        <input
          type="range"
          min="0"
          max="1"
          step="0.01"
          value={videoState.muted ? 0 : videoState.volume}
          onChange={handleSliderChange}
          className="volume-slider"
          aria-label="Volume"
        />
        <div
          className="volume-slider-fill"
          style={{ width: `${(videoState.muted ? 0 : videoState.volume) * 100}%` }}
        />
      </div>
    </div>
  )
}