import React, { useEffect, useState } from 'react';
import { useVoiceStore } from '../../stores/voiceStore';
import { useUIStore } from '../../stores/uiStore';
import { getActiveRoom } from '../../hooks/useLiveKit';
import { wsSend } from '../../hooks/useWebSocket';
import { VideoQualityPopover } from './VideoQualityPopover';
import { VideoPresets, VideoPreset } from 'livekit-client';

const QUALITY_MAP: Record<string, any> = {
  '1080p60': new VideoPreset(1920, 1080, 15_000_000, 60),
  '1080p': new VideoPreset(1920, 1080, 8_000_000, 30),
  '720p60': new VideoPreset(1280, 720, 8_000_000, 60),
  '720p': new VideoPreset(1280, 720, 5_000_000, 30),
  '540p': new VideoPreset(960, 540, 2_000_000, 30),
  '360p': new VideoPreset(640, 360, 1_000_000, 30),
};

const btnBase = 'w-10 h-10 flex items-center justify-center rounded-full transition-colors';
const btnDefault = `${btnBase} bg-[#1e1f22] text-discord-text-secondary hover:bg-[#2b2d31] hover:text-discord-text-primary`;
const btnActive = (color: string) => `${btnBase} bg-${color}/20 text-${color} hover:bg-${color}/30`;
const btnGreen = `${btnBase} bg-[#1e1f22] text-discord-green hover:bg-[#2b2d31]`;

export function VoiceControlBar() {
  const isMuted = useVoiceStore((s) => s.isMuted);
  const isDeafened = useVoiceStore((s) => s.isDeafened);
  const isCameraOn = useVoiceStore((s) => s.isCameraOn);
  const isScreenSharing = useVoiceStore((s) => s.isScreenSharing);
  const toggleMic = useVoiceStore((s) => s.toggleMic);
  const toggleDeafen = useVoiceStore((s) => s.toggleDeafen);
  const toggleCamera = useVoiceStore((s) => s.toggleCamera);
  const toggleScreenShare = useVoiceStore((s) => s.toggleScreenShare);
  const voiceChatOpen = useUIStore((s) => s.voiceChatOpen);
  const toggleVoiceChat = useUIStore((s) => s.toggleVoiceChat);
  const voiceFullscreen = useUIStore((s) => s.voiceFullscreen);
  const toggleVoiceFullscreen = useUIStore((s) => s.toggleVoiceFullscreen);
  const [qualityOpen, setQualityOpen] = useState(false);

  const handleMute = React.useCallback(async () => {
    const room = getActiveRoom();
    if (room) {
      try {
        await room.localParticipant.setMicrophoneEnabled(isMuted);
      } catch (err) {
        console.error('[VoiceControlBar] Failed to toggle mic:', err);
      }
    }
    toggleMic();
  }, [isMuted, toggleMic]);

  const handleDeafen = React.useCallback(async () => {
    const room = getActiveRoom();
    if (room) {
      try {
        const willDeafen = !isDeafened;
        if (willDeafen) {
          await room.localParticipant.setMicrophoneEnabled(false);
          room.remoteParticipants.forEach((p) => p.setVolume(0));
          if (!isMuted) toggleMic();
        } else {
          const outputVolume = useVoiceStore.getState().outputVolume;
          room.remoteParticipants.forEach((p) => p.setVolume(outputVolume / 100));
          await room.localParticipant.setMicrophoneEnabled(true);
          if (isMuted) toggleMic();
        }
      } catch (err) {
        console.error('[VoiceControlBar] Failed to toggle deafen:', err);
      }
    }
    toggleDeafen();
  }, [isDeafened, isMuted, toggleDeafen, toggleMic]);

  const handleCamera = async () => {
    const room = getActiveRoom();
    if (!room) return;
    try {
      const willEnable = !isCameraOn;
      if (willEnable) {
        const videoQuality = useVoiceStore.getState().videoQuality;
        const preset = QUALITY_MAP[videoQuality];
        if (preset) {
          await room.localParticipant.setCameraEnabled(true,
            { resolution: preset.resolution },
            {
              videoEncoding: preset.encoding,
              simulcast: videoQuality === '1080p' || videoQuality === '720p'
            }
          );
        } else {
          await room.localParticipant.setCameraEnabled(true);
        }
      } else {
        await room.localParticipant.setCameraEnabled(false);
      }
      toggleCamera();
    } catch (err) {
      console.error('[VoiceControlBar] Failed to toggle camera:', err);
    }
  };

  const handleScreenShare = async () => {
    const room = getActiveRoom();
    if (!room) return;
    try {
      await room.localParticipant.setScreenShareEnabled(!isScreenSharing);
      toggleScreenShare();
    } catch (err) {
      console.error('[VoiceControlBar] Failed to toggle screen share:', err);
    }
  };

  const handleDisconnect = () => {
    wsSend({ type: 'voice_leave' });
    useVoiceStore.getState().leaveVoice();
    if (voiceFullscreen) {
      useUIStore.getState().setVoiceFullscreen(false);
      if (document.fullscreenElement) {
        document.exitFullscreen().catch(() => {});
      }
    }
  };

  const handleFullscreen = () => {
    if (!voiceFullscreen) {
      document.documentElement.requestFullscreen?.().catch(() => {});
    } else {
      if (document.fullscreenElement) {
        document.exitFullscreen().catch(() => {});
      }
    }
    toggleVoiceFullscreen();
  };

  // Keyboard shortcuts
  useEffect(() => {
    const handleKeyDown = (e: KeyboardEvent) => {
      if (e.target instanceof HTMLInputElement || e.target instanceof HTMLTextAreaElement) return;
      if (e.key === 'm' || e.key === 'M') {
        e.preventDefault();
        handleMute();
      } else if (e.key === 'd' || e.key === 'D') {
        e.preventDefault();
        handleDeafen();
      } else if (e.key === 'Escape' && voiceFullscreen) {
        useUIStore.getState().setVoiceFullscreen(false);
      }
    };
    window.addEventListener('keydown', handleKeyDown);
    return () => window.removeEventListener('keydown', handleKeyDown);
  }, [handleMute, handleDeafen, voiceFullscreen]);

  return (
    <div className="absolute bottom-6 left-1/2 -translate-x-1/2 z-20 opacity-0 translate-y-4 group-hover/voice:opacity-100 group-hover/voice:translate-y-0 transition-all duration-300 ease-out">
      <div className="flex items-center gap-1.5 rounded-full px-3 py-2 bg-[#111214]/90 backdrop-blur-md ring-1 ring-white/[0.06] shadow-[0_8px_32px_rgba(0,0,0,0.5)]">
        {/* Mute */}
        <button
          onClick={handleMute}
          className={isMuted || isDeafened
            ? `${btnBase} bg-discord-red/20 text-discord-red hover:bg-discord-red/30`
            : btnDefault
          }
          title={isMuted ? 'Unmute (M)' : 'Mute (M)'}
        >
          <svg width="20" height="20" viewBox="0 0 24 24" fill="currentColor">
            <path d="M12 14c1.66 0 3-1.34 3-3V5c0-1.66-1.34-3-3-3S9 3.34 9 5v6c0 1.66 1.34 3 3 3z" />
            <path d="M17 11c0 2.76-2.24 5-5 5s-5-2.24-5-5H5c0 3.53 2.61 6.43 6 6.92V21h2v-3.08c3.39-.49 6-3.39 6-6.92h-2z" />
            {(isMuted || isDeafened) && <line x1="3" y1="3" x2="21" y2="21" stroke="currentColor" strokeWidth="2.5" strokeLinecap="round" />}
          </svg>
        </button>

        {/* Deafen */}
        <button
          onClick={handleDeafen}
          className={isDeafened
            ? `${btnBase} bg-discord-red/20 text-discord-red hover:bg-discord-red/30`
            : btnDefault
          }
          title={isDeafened ? 'Undeafen (D)' : 'Deafen (D)'}
        >
          <svg width="20" height="20" viewBox="0 0 24 24" fill="currentColor">
            <path d="M12 3c-4.97 0-9 4.03-9 9v7c0 1.1.9 2 2 2h2v-7H5v-2c0-3.87 3.13-7 7-7s7 3.13 7 7v2h-2v7h2c1.1 0 2-.9 2-2v-7c0-4.97-4.03-9-9-9z" />
            {isDeafened && <line x1="3" y1="3" x2="21" y2="21" stroke="currentColor" strokeWidth="2.5" strokeLinecap="round" />}
          </svg>
        </button>

        {/* Camera */}
        <button
          onClick={handleCamera}
          className={isCameraOn ? btnGreen : btnDefault}
          title={isCameraOn ? 'Turn Off Camera' : 'Turn On Camera'}
        >
          {isCameraOn ? (
            <svg width="20" height="20" viewBox="0 0 24 24" fill="currentColor">
              <path d="M17 10.5V7C17 6.45 16.55 6 16 6H4C3.45 6 3 6.45 3 7V17C3 17.55 3.45 18 4 18H16C16.55 18 17 17.55 17 17V13.5L21 17.5V6.5L17 10.5Z" />
            </svg>
          ) : (
            <svg width="20" height="20" viewBox="0 0 24 24" fill="currentColor">
              <path d="M17 10.5V7C17 6.45 16.55 6 16 6H4C3.45 6 3 6.45 3 7V17C3 17.55 3.45 18 4 18H16C16.55 18 17 17.55 17 17V13.5L21 17.5V6.5L17 10.5Z" />
              <line x1="2" y1="2" x2="22" y2="22" stroke="currentColor" strokeWidth="2.5" strokeLinecap="round" />
            </svg>
          )}
        </button>

        {/* Screen Share */}
        <button
          onClick={handleScreenShare}
          className={isScreenSharing ? btnGreen : btnDefault}
          title={isScreenSharing ? 'Stop Sharing' : 'Share Screen'}
        >
          <svg width="20" height="20" viewBox="0 0 24 24" fill="currentColor">
            <path d="M20 18C21.1 18 22 17.1 22 16V6C22 4.9 21.1 4 20 4H4C2.9 4 2 4.9 2 6V16C2 17.1 2.9 18 4 18H0V20H24V18H20ZM4 6H20V16H4V6Z" />
            <path d="M15 11L11 14V12H9V10H11V8L15 11Z" />
          </svg>
        </button>

        {/* Video Quality */}
        <div className="relative">
          <button
            onClick={() => setQualityOpen(!qualityOpen)}
            className={qualityOpen
              ? `${btnBase} bg-[#1e1f22] text-discord-text-primary`
              : btnDefault
            }
            title="Video Quality"
          >
            <svg width="20" height="20" viewBox="0 0 24 24" fill="currentColor">
              <path d="M19.14 12.94c.04-.3.06-.61.06-.94 0-.32-.02-.64-.07-.94l2.03-1.58c.18-.14.23-.41.12-.61l-1.92-3.32c-.12-.22-.37-.29-.59-.22l-2.39.96c-.5-.38-1.03-.7-1.62-.94l-.36-2.54c-.04-.24-.24-.41-.48-.41h-3.84c-.24 0-.43.17-.47.41l-.36 2.54c-.59.24-1.13.57-1.62.94l-2.39-.96c-.22-.08-.47 0-.59.22L2.74 8.87c-.12.21-.08.47.12.61l2.03 1.58c-.05.3-.07.62-.07.94s.02.64.07.94l-2.03 1.58c-.18.14-.23.41-.12.61l1.92 3.32c.12.22.37.29.59.22l2.39-.96c.5.38 1.03.7 1.62.94l.36 2.54c.05.24.24.41.48.41h3.84c.24 0 .44-.17.47-.41l.36-2.54c.59-.24 1.13-.56 1.62-.94l2.39.96c.22.08.47 0 .59-.22l1.92-3.32c.12-.22.07-.47-.12-.61l-2.01-1.58zM12 15.6c-1.98 0-3.6-1.62-3.6-3.6s1.62-3.6 3.6-3.6 3.6 1.62 3.6 3.6-1.62 3.6-3.6 3.6z" />
            </svg>
          </button>
          <VideoQualityPopover open={qualityOpen} onClose={() => setQualityOpen(false)} />
        </div>

        {/* Separator */}
        <div className="w-[1px] h-6 bg-white/10 mx-0.5" />

        {/* Chat Toggle */}
        <button
          onClick={toggleVoiceChat}
          className={voiceChatOpen
            ? `${btnBase} bg-[#1e1f22] text-discord-text-primary`
            : btnDefault
          }
          title="Toggle Chat"
        >
          <svg width="20" height="20" viewBox="0 0 24 24" fill="currentColor">
            <path d="M20 2H4c-1.1 0-1.99.9-1.99 2L2 22l4-4h14c1.1 0 2-.9 2-2V4c0-1.1-.9-2-2-2zM6 9h12v2H6V9zm8 5H6v-2h8v2zm4-6H6V6h12v2z" />
          </svg>
        </button>

        {/* Fullscreen Toggle */}
        <button
          onClick={handleFullscreen}
          className={voiceFullscreen
            ? `${btnBase} bg-[#1e1f22] text-discord-text-primary`
            : btnDefault
          }
          title={voiceFullscreen ? 'Exit Fullscreen (Esc)' : 'Fullscreen'}
        >
          {voiceFullscreen ? (
            <svg width="20" height="20" viewBox="0 0 24 24" fill="currentColor">
              <path d="M5 16h3v3h2v-5H5v2zm3-8H5v2h5V5H8v3zm6 11h2v-3h3v-2h-5v5zm2-11V5h-2v5h5V8h-3z" />
            </svg>
          ) : (
            <svg width="20" height="20" viewBox="0 0 24 24" fill="currentColor">
              <path d="M7 14H5v5h5v-2H7v-3zm-2-4h2V7h3V5H5v5zm12 7h-3v2h5v-5h-2v3zM14 5v2h3v3h2V5h-5z" />
            </svg>
          )}
        </button>

        {/* Separator */}
        <div className="w-[1px] h-6 bg-white/10 mx-0.5" />

        {/* Disconnect */}
        <button
          onClick={handleDisconnect}
          className={`${btnBase} bg-discord-red hover:bg-discord-red-hover text-white`}
          title="Disconnect"
        >
          <svg width="20" height="20" viewBox="0 0 24 24" fill="currentColor">
            <path d="M12 9C10.4 9 8.85 9.25 7.4 9.72V12.82C7.4 13.22 7.17 13.56 6.84 13.72C5.86 14.21 4.97 14.84 4.18 15.57C4 15.75 3.75 15.85 3.48 15.85C3.2 15.85 2.95 15.74 2.77 15.56L0.29 13.08C0.11 12.9 0 12.65 0 12.38C0 12.1 0.11 11.85 0.29 11.67C3.34 8.78 7.46 7 12 7S20.66 8.78 23.71 11.67C23.89 11.85 24 12.1 24 12.38C24 12.65 23.89 12.9 23.71 13.08L21.23 15.56C21.05 15.74 20.8 15.85 20.52 15.85C20.25 15.85 20 15.75 19.82 15.57C19.03 14.84 18.14 14.21 17.16 13.72C16.83 13.56 16.6 13.22 16.6 12.82V9.72C15.15 9.25 13.6 9 12 9Z" />
          </svg>
        </button>
      </div>
    </div>
  );
}