"use client";

import * as React from "react";
import {
  Volume2,
  VolumeX,
  Headphones,
  Trash2,
  ChevronDown,
  ChevronRight,
  ChevronUp,
  UnfoldHorizontal,
  Upload,
  Mic,
  Gauge,
  Circle,
  Sparkles,
} from "lucide-react";
import type { Track as TrackType } from "@/types/track";
import {
  COLLAPSED_TRACK_HEIGHT,
  MIN_TRACK_HEIGHT,
  MAX_TRACK_HEIGHT,
  DEFAULT_TRACK_HEIGHT,
} from "@/types/track";
import { Button } from "@/components/ui/Button";
import { Slider } from "@/components/ui/Slider";
import { cn } from "@/lib/utils/cn";
import type { EffectType } from "@/lib/audio/effects/chain";
import { TrackControls } from "./TrackControls";
import { AutomationLane } from "@/components/automation/AutomationLane";
import type {
  AutomationLane as AutomationLaneType,
  AutomationPoint as AutomationPointType,
} from "@/types/automation";
import { createAutomationPoint } from "@/lib/audio/automation/utils";
import { createAutomationLane } from "@/lib/audio/automation-utils";
import { EffectDevice } from "@/components/effects/EffectDevice";
import { EffectBrowser } from "@/components/effects/EffectBrowser";
import { ImportDialog } from "@/components/dialogs/ImportDialog";
import { importAudioFile, type ImportOptions } from "@/lib/audio/decoder";

export interface TrackProps {
  track: TrackType;
  zoom: number;
  currentTime: number;
  duration: number;
  isSelected?: boolean;
  onSelect?: () => void;
  onToggleMute: () => void;
  onToggleSolo: () => void;
  onToggleCollapse: () => void;
  onVolumeChange: (volume: number) => void;
  onPanChange: (pan: number) => void;
  onRemove: () => void;
  onNameChange: (name: string) => void;
  onUpdateTrack: (trackId: string, updates: Partial<TrackType>) => void;
  onSeek?: (time: number) => void;
  onLoadAudio?: (buffer: AudioBuffer) => void;
  onToggleEffect?: (effectId: string) => void;
  onRemoveEffect?: (effectId: string) => void;
  onUpdateEffect?: (effectId: string, parameters: any) => void;
  onAddEffect?: (effectType: EffectType) => void;
  onSelectionChange?: (
    selection: { start: number; end: number } | null,
  ) => void;
  onToggleRecordEnable?: () => void;
  isRecording?: boolean;
  recordingLevel?: number;
  playbackLevel?: number;
  onParameterTouched?: (
    trackId: string,
    laneId: string,
    touched: boolean,
  ) => void;
  isPlaying?: boolean;
  renderControlsOnly?: boolean;
  renderWaveformOnly?: boolean;
}

export function Track({
  track,
  zoom,
  currentTime,
  duration,
  isSelected,
  onSelect,
  onToggleMute,
  onToggleSolo,
  onToggleCollapse,
  onVolumeChange,
  onPanChange,
  onRemove,
  onNameChange,
  onUpdateTrack,
  onSeek,
  onLoadAudio,
  onToggleEffect,
  onRemoveEffect,
  onUpdateEffect,
  onAddEffect,
  onSelectionChange,
  onToggleRecordEnable,
  isRecording = false,
  recordingLevel = 0,
  playbackLevel = 0,
  onParameterTouched,
  isPlaying = false,
  renderControlsOnly = false,
  renderWaveformOnly = false,
}: TrackProps) {
  const canvasRef = React.useRef<HTMLCanvasElement>(null);
  const containerRef = React.useRef<HTMLDivElement>(null);
  const fileInputRef = React.useRef<HTMLInputElement>(null);
  const [themeKey, setThemeKey] = React.useState(0);
  const [isResizing, setIsResizing] = React.useState(false);
  const resizeStartRef = React.useRef({ y: 0, height: 0 });
  const [effectBrowserOpen, setEffectBrowserOpen] = React.useState(false);

  // Import dialog state
  const [showImportDialog, setShowImportDialog] = React.useState(false);
  const [pendingFile, setPendingFile] = React.useState<File | null>(null);
  const [fileMetadata, setFileMetadata] = React.useState<{
    sampleRate?: number;
    channels?: number;
  }>({});

  // Selection state
  const [isSelecting, setIsSelecting] = React.useState(false);
  const [selectionStart, setSelectionStart] = React.useState<number | null>(
    null,
  );
  const [isSelectingByDrag, setIsSelectingByDrag] = React.useState(false);
  const [dragStartPos, setDragStartPos] = React.useState<{
    x: number;
    y: number;
  } | null>(null);

  // Touch callbacks for automation recording
  const handlePanTouchStart = React.useCallback(() => {
    if (isPlaying && onParameterTouched) {
      const panLane = track.automation.lanes.find(
        (l) => l.parameterId === "pan",
      );
      if (panLane && (panLane.mode === "touch" || panLane.mode === "latch")) {
        queueMicrotask(() => onParameterTouched(track.id, panLane.id, true));
      }
    }
  }, [isPlaying, onParameterTouched, track.id, track.automation.lanes]);

  const handlePanTouchEnd = React.useCallback(() => {
    if (isPlaying && onParameterTouched) {
      const panLane = track.automation.lanes.find(
        (l) => l.parameterId === "pan",
      );
      if (panLane && (panLane.mode === "touch" || panLane.mode === "latch")) {
        queueMicrotask(() => onParameterTouched(track.id, panLane.id, false));
      }
    }
  }, [isPlaying, onParameterTouched, track.id, track.automation.lanes]);

  const handleVolumeTouchStart = React.useCallback(() => {
    if (isPlaying && onParameterTouched) {
      const volumeLane = track.automation.lanes.find(
        (l) => l.parameterId === "volume",
      );
      if (
        volumeLane &&
        (volumeLane.mode === "touch" || volumeLane.mode === "latch")
      ) {
        queueMicrotask(() => onParameterTouched(track.id, volumeLane.id, true));
      }
    }
  }, [isPlaying, onParameterTouched, track.id, track.automation.lanes]);

  const handleVolumeTouchEnd = React.useCallback(() => {
    if (isPlaying && onParameterTouched) {
      const volumeLane = track.automation.lanes.find(
        (l) => l.parameterId === "volume",
      );
      if (
        volumeLane &&
        (volumeLane.mode === "touch" || volumeLane.mode === "latch")
      ) {
        queueMicrotask(() =>
          onParameterTouched(track.id, volumeLane.id, false),
        );
      }
    }
  }, [isPlaying, onParameterTouched, track.id, track.automation.lanes]);

  // Auto-create automation lane for selected parameter if it doesn't exist
  React.useEffect(() => {
    if (!track.automation?.showAutomation) return;

    const selectedParameterId =
      track.automation.selectedParameterId || "volume";
    const laneExists = track.automation.lanes.some(
      (lane) => lane.parameterId === selectedParameterId,
    );

    if (!laneExists) {
      // Build list of available parameters
      const availableParameters: Array<{ id: string; name: string }> = [
        { id: "volume", name: "Volume" },
        { id: "pan", name: "Pan" },
      ];

      track.effectChain.effects.forEach((effect) => {
        if (effect.parameters) {
          Object.keys(effect.parameters).forEach((paramKey) => {
            const parameterId = `effect.${effect.id}.${paramKey}`;
            const paramName = `${effect.name} - ${paramKey.charAt(0).toUpperCase() + paramKey.slice(1)}`;
            availableParameters.push({ id: parameterId, name: paramName });
          });
        }
      });

      const paramInfo = availableParameters.find(
        (p) => p.id === selectedParameterId,
      );
      if (paramInfo) {
        // Determine value range based on parameter type
        let valueRange = { min: 0, max: 1 };
        let unit = "";
        let formatter: ((value: number) => string) | undefined;

        if (selectedParameterId === "volume") {
          unit = "dB";
        } else if (selectedParameterId === "pan") {
          formatter = (value: number) => {
            if (value === 0.5) return "C";
            if (value < 0.5)
              return `${Math.abs((0.5 - value) * 200).toFixed(0)}L`;
            return `${((value - 0.5) * 200).toFixed(0)}R`;
          };
        } else if (selectedParameterId.startsWith("effect.")) {
          // Parse effect parameter: effect.{effectId}.{paramName}
          const parts = selectedParameterId.split(".");
          if (parts.length === 3) {
            const paramName = parts[2];
            // Set ranges based on parameter name
            if (paramName === "frequency") {
              valueRange = { min: 20, max: 20000 };
              unit = "Hz";
            } else if (paramName === "Q") {
              valueRange = { min: 0.1, max: 20 };
            } else if (paramName === "gain") {
              valueRange = { min: -40, max: 40 };
              unit = "dB";
            }
          }
        }

        const newLane = createAutomationLane(
          track.id,
          selectedParameterId,
          paramInfo.name,
          {
            min: valueRange.min,
            max: valueRange.max,
            unit,
            formatter,
          },
        );

        onUpdateTrack(track.id, {
          automation: {
            ...track.automation,
            lanes: [...track.automation.lanes, newLane],
            selectedParameterId,
          },
        });
      }
    }
  }, [
    track.automation?.showAutomation,
    track.automation?.selectedParameterId,
    track.automation?.lanes,
    track.effectChain.effects,
    track.id,
    onUpdateTrack,
  ]);

  // Listen for theme changes
  React.useEffect(() => {
    const observer = new MutationObserver(() => {
      // Increment key to force waveform redraw
      setThemeKey((prev) => prev + 1);
    });

    // Watch for class changes on document element (dark mode toggle)
    observer.observe(document.documentElement, {
      attributes: true,
      attributeFilter: ["class"],
    });

    return () => observer.disconnect();
  }, []);

  // Draw waveform
  React.useEffect(() => {
    if (!track.audioBuffer || !canvasRef.current) return;

    const canvas = canvasRef.current;
    const ctx = canvas.getContext("2d");
    if (!ctx) return;

    // Use parent container's size since canvas is absolute positioned
    const parent = canvas.parentElement;
    if (!parent) return;

    const dpr = window.devicePixelRatio || 1;
    const rect = parent.getBoundingClientRect();

    canvas.width = rect.width * dpr;
    canvas.height = rect.height * dpr;
    ctx.scale(dpr, dpr);

    const width = rect.width;
    const height = rect.height;

    // Clear canvas with theme color
    const bgColor =
      getComputedStyle(canvas).getPropertyValue("--color-waveform-bg") ||
      "rgb(15, 23, 42)";
    ctx.fillStyle = bgColor;
    ctx.fillRect(0, 0, width, height);

    const buffer = track.audioBuffer;
    const channelData = buffer.getChannelData(0);
    const samplesPerPixel = Math.floor(buffer.length / (width * zoom));

    // Draw waveform
    ctx.fillStyle = track.color;
    ctx.strokeStyle = track.color;
    ctx.lineWidth = 1;

    for (let x = 0; x < width; x++) {
      const startSample = Math.floor(x * samplesPerPixel);
      const endSample = Math.floor((x + 1) * samplesPerPixel);

      let min = 1.0;
      let max = -1.0;

      for (let i = startSample; i < endSample && i < channelData.length; i++) {
        const sample = channelData[i];
        if (sample < min) min = sample;
        if (sample > max) max = sample;
      }

      const y1 = (height / 2) * (1 - max);
      const y2 = (height / 2) * (1 - min);

      ctx.beginPath();
      ctx.moveTo(x, y1);
      ctx.lineTo(x, y2);
      ctx.stroke();
    }

    // Draw center line
    ctx.strokeStyle = "rgba(148, 163, 184, 0.2)";
    ctx.lineWidth = 1;
    ctx.beginPath();
    ctx.moveTo(0, height / 2);
    ctx.lineTo(width, height / 2);
    ctx.stroke();

    // Draw selection overlay
    if (track.selection && duration > 0) {
      const selStartX = (track.selection.start / duration) * width;
      const selEndX = (track.selection.end / duration) * width;

      // Draw selection background
      ctx.fillStyle = "rgba(59, 130, 246, 0.2)";
      ctx.fillRect(selStartX, 0, selEndX - selStartX, height);

      // Draw selection borders
      ctx.strokeStyle = "rgba(59, 130, 246, 0.8)";
      ctx.lineWidth = 2;

      // Start border
      ctx.beginPath();
      ctx.moveTo(selStartX, 0);
      ctx.lineTo(selStartX, height);
      ctx.stroke();

      // End border
      ctx.beginPath();
      ctx.moveTo(selEndX, 0);
      ctx.lineTo(selEndX, height);
      ctx.stroke();
    }

    // Draw playhead
    if (duration > 0) {
      const playheadX = (currentTime / duration) * width;
      ctx.strokeStyle = "rgba(239, 68, 68, 0.8)";
      ctx.lineWidth = 2;
      ctx.beginPath();
      ctx.moveTo(playheadX, 0);
      ctx.lineTo(playheadX, height);
      ctx.stroke();
    }
  }, [
    track.audioBuffer,
    track.color,
    track.collapsed,
    track.height,
    zoom,
    currentTime,
    duration,
    themeKey,
    track.selection,
  ]);

  const handleCanvasMouseDown = (e: React.MouseEvent<HTMLCanvasElement>) => {
    if (!duration) return;

    const rect = e.currentTarget.getBoundingClientRect();
    const x = e.clientX - rect.left;
    const y = e.clientY - rect.top;
    const clickTime = (x / rect.width) * duration;

    // Store drag start position
    setDragStartPos({ x: e.clientX, y: e.clientY });
    setIsSelectingByDrag(false);

    // Start selection immediately (will be used if user drags)
    setIsSelecting(true);
    setSelectionStart(clickTime);
  };

  const handleCanvasMouseMove = (e: React.MouseEvent<HTMLCanvasElement>) => {
    if (!isSelecting || selectionStart === null || !duration || !dragStartPos)
      return;

    const rect = e.currentTarget.getBoundingClientRect();
    const x = e.clientX - rect.left;
    const currentTime = (x / rect.width) * duration;

    // Check if user has moved enough to be considered dragging (threshold: 3 pixels)
    const dragDistance = Math.sqrt(
      Math.pow(e.clientX - dragStartPos.x, 2) +
        Math.pow(e.clientY - dragStartPos.y, 2),
    );

    if (dragDistance > 3) {
      setIsSelectingByDrag(true);
    }

    // If dragging, update selection
    if (isSelectingByDrag || dragDistance > 3) {
      // Clamp to valid time range
      const clampedTime = Math.max(0, Math.min(duration, currentTime));

      // Update selection (ensure start < end)
      const start = Math.min(selectionStart, clampedTime);
      const end = Math.max(selectionStart, clampedTime);

      onSelectionChange?.({ start, end });
    }
  };

  const handleCanvasMouseUp = (e: React.MouseEvent<HTMLCanvasElement>) => {
    if (!duration) return;

    const rect = e.currentTarget.getBoundingClientRect();
    const x = e.clientX - rect.left;
    const clickTime = (x / rect.width) * duration;

    // Check if user actually dragged (check distance directly, not state)
    const didDrag = dragStartPos
      ? Math.sqrt(
          Math.pow(e.clientX - dragStartPos.x, 2) +
            Math.pow(e.clientY - dragStartPos.y, 2),
        ) > 3
      : false;

    // If user didn't drag (just clicked), clear selection and seek
    if (!didDrag) {
      onSelectionChange?.(null);
      if (onSeek) {
        onSeek(clickTime);
      }
    }

    // Reset drag state
    setIsSelecting(false);
    setIsSelectingByDrag(false);
    setDragStartPos(null);
  };

  // Handle mouse leaving canvas during selection
  React.useEffect(() => {
    const handleGlobalMouseUp = () => {
      if (isSelecting) {
        setIsSelecting(false);
        setIsSelectingByDrag(false);
        setDragStartPos(null);
      }
    };

    window.addEventListener("mouseup", handleGlobalMouseUp);
    return () => window.removeEventListener("mouseup", handleGlobalMouseUp);
  }, [isSelecting]);

  const handleFileChange = async (e: React.ChangeEvent<HTMLInputElement>) => {
    const file = e.target.files?.[0];
    if (!file || !onLoadAudio) return;

    try {
      // Decode to get basic metadata before showing dialog
      const arrayBuffer = await file.arrayBuffer();
      const audioContext = new AudioContext();
      const tempBuffer = await audioContext.decodeAudioData(arrayBuffer);

      // Set metadata and show import dialog
      setFileMetadata({
        sampleRate: tempBuffer.sampleRate,
        channels: tempBuffer.numberOfChannels,
      });
      setPendingFile(file);
      setShowImportDialog(true);
    } catch (error) {
      console.error("Failed to read audio file metadata:", error);
    }

    // Reset input
    e.target.value = "";
  };

  const handleImport = async (options: ImportOptions) => {
    if (!pendingFile || !onLoadAudio) return;

    try {
      setShowImportDialog(false);
      const { buffer, metadata } = await importAudioFile(pendingFile, options);
      onLoadAudio(buffer);

      // Update track name to filename if it's still default
      if (track.name === "New Track" || track.name === "Untitled Track") {
        const fileName = metadata.fileName.replace(/\.[^/.]+$/, "");
        onNameChange(fileName);
      }

      console.log("Audio imported:", metadata);
    } catch (error) {
      console.error("Failed to import audio file:", error);
    } finally {
      setPendingFile(null);
      setFileMetadata({});
    }
  };

  const handleImportCancel = () => {
    setShowImportDialog(false);
    setPendingFile(null);
    setFileMetadata({});
  };

  const handleLoadAudioClick = () => {
    fileInputRef.current?.click();
  };

  const [isDragging, setIsDragging] = React.useState(false);

  const handleDragOver = (e: React.DragEvent) => {
    e.preventDefault();
    e.stopPropagation();
    setIsDragging(true);
  };

  const handleDragLeave = (e: React.DragEvent) => {
    e.preventDefault();
    e.stopPropagation();
    setIsDragging(false);
  };

  const handleDrop = async (e: React.DragEvent) => {
    e.preventDefault();
    e.stopPropagation();
    setIsDragging(false);

    const file = e.dataTransfer.files?.[0];
    if (!file || !onLoadAudio) return;

    // Check if it's an audio file
    if (!file.type.startsWith("audio/")) {
      console.warn("Dropped file is not an audio file");
      return;
    }

    try {
      const arrayBuffer = await file.arrayBuffer();
      const audioContext = new AudioContext();
      const audioBuffer = await audioContext.decodeAudioData(arrayBuffer);
      onLoadAudio(audioBuffer);

      // Update track name to filename if it's still default
      if (track.name === "New Track" || track.name === "Untitled Track") {
        const fileName = file.name.replace(/\.[^/.]+$/, "");
        onNameChange(fileName);
      }
    } catch (error) {
      console.error("Failed to load audio file:", error);
    }
  };

  const trackHeight = track.collapsed
    ? COLLAPSED_TRACK_HEIGHT
    : Math.max(track.height || DEFAULT_TRACK_HEIGHT, MIN_TRACK_HEIGHT);

  // Track height resize handlers
  const handleResizeStart = React.useCallback(
    (e: React.MouseEvent) => {
      if (track.collapsed) return;
      e.preventDefault();
      e.stopPropagation();
      setIsResizing(true);
      resizeStartRef.current = { y: e.clientY, height: track.height };
    },
    [track.collapsed, track.height],
  );

  React.useEffect(() => {
    if (!isResizing) return;

    const handleMouseMove = (e: MouseEvent) => {
      const delta = e.clientY - resizeStartRef.current.y;
      const newHeight = Math.max(
        MIN_TRACK_HEIGHT,
        Math.min(MAX_TRACK_HEIGHT, resizeStartRef.current.height + delta),
      );
      onUpdateTrack(track.id, { height: newHeight });
    };

    const handleMouseUp = () => {
      setIsResizing(false);
    };

    window.addEventListener("mousemove", handleMouseMove);
    window.addEventListener("mouseup", handleMouseUp);

    return () => {
      window.removeEventListener("mousemove", handleMouseMove);
      window.removeEventListener("mouseup", handleMouseUp);
    };
  }, [isResizing, onUpdateTrack, track.id]);

  // Render only controls
  if (renderControlsOnly) {
    return (
      <>
        <div
          className={cn(
            "w-full flex-shrink-0 border-b border-r-4 p-4 flex flex-col gap-4 min-h-0 transition-all duration-200 cursor-pointer border-border",
            isSelected
              ? "bg-primary/10 border-r-primary"
              : "bg-card border-r-transparent hover:bg-accent/30",
          )}
          style={{
            height: `${trackHeight}px`,
          }}
          onClick={(e) => {
            e.stopPropagation();
            if (onSelect) onSelect();
          }}
        >
          {/* Collapsed Header */}
          {track.collapsed && (
            <div
              className={cn(
                "group flex items-center gap-1.5 px-2 py-1 h-full w-full cursor-pointer transition-colors",
                isSelected ? "bg-primary/10" : "hover:bg-accent/50",
              )}
              onClick={(e) => {
                e.stopPropagation();
                onToggleCollapse();
              }}
              title="Expand track"
            >
              <ChevronRight className="h-3 w-3 text-muted-foreground flex-shrink-0" />
              <div
                className="h-4 w-0.5 rounded-full flex-shrink-0"
                style={{ backgroundColor: track.color }}
              />
              <span className="text-xs font-semibold text-foreground truncate flex-1">
                {String(track.name || "Untitled Track")}
              </span>
            </div>
          )}

          {/* Track Controls - Only show when not collapsed */}
          {!track.collapsed && (
            <div className="flex-1 flex flex-col items-center justify-center min-h-0 overflow-hidden">
              {/* Integrated Track Controls (Pan + Fader + Buttons) */}
              <TrackControls
                trackName={track.name}
                trackColor={track.color}
                collapsed={track.collapsed}
                volume={track.volume}
                pan={track.pan}
                peakLevel={
                  track.recordEnabled || isRecording
                    ? recordingLevel
                    : playbackLevel
                }
                rmsLevel={
                  track.recordEnabled || isRecording
                    ? recordingLevel * 0.7
                    : playbackLevel * 0.7
                }
                isMuted={track.mute}
                isSolo={track.solo}
                isRecordEnabled={track.recordEnabled}
                showAutomation={track.automation?.showAutomation}
                showEffects={track.showEffects}
                isRecording={isRecording}
                onNameChange={onNameChange}
                onToggleCollapse={onToggleCollapse}
                onVolumeChange={onVolumeChange}
                onPanChange={onPanChange}
                onMuteToggle={onToggleMute}
                onSoloToggle={onToggleSolo}
                onRecordToggle={onToggleRecordEnable}
                onAutomationToggle={() => {
                  onUpdateTrack(track.id, {
                    automation: {
                      ...track.automation,
                      showAutomation: !track.automation?.showAutomation,
                    },
                  });
                }}
                onEffectsClick={() => {
                  onUpdateTrack(track.id, {
                    showEffects: !track.showEffects,
                  });
                }}
                onVolumeTouchStart={handleVolumeTouchStart}
                onVolumeTouchEnd={handleVolumeTouchEnd}
                onPanTouchStart={handlePanTouchStart}
                onPanTouchEnd={handlePanTouchEnd}
              />
            </div>
          )}
        </div>

        {/* Import Dialog - Only render in controls mode to avoid duplicates */}
        <ImportDialog
          open={showImportDialog}
          onClose={handleImportCancel}
          onImport={handleImport}
          fileName={pendingFile?.name}
          sampleRate={fileMetadata.sampleRate}
          channels={fileMetadata.channels}
        />
      </>
    );
  }

  // Render only waveform
  if (renderWaveformOnly) {
    return (
      <div
        className={cn(
          "relative bg-waveform-bg border-b transition-all duration-200 h-full",
          isSelected && "bg-primary/5",
        )}
      >
        {/* Inner container with dynamic width */}
        <div
          className="relative h-full"
          style={{
            minWidth:
              track.audioBuffer && zoom > 1
                ? `${duration * zoom * 100}px`
                : "100%",
          }}
        >
          {/* Delete Button - Top Right Overlay - Stays fixed when scrolling */}
          <button
            onClick={(e) => {
              e.stopPropagation();
              onRemove();
            }}
            className={cn(
              "sticky top-2 right-2 float-right z-20 h-6 w-6 rounded flex items-center justify-center transition-all",
              "bg-card/80 hover:bg-destructive/90 text-muted-foreground hover:text-white",
              "border border-border/50 hover:border-destructive",
              "backdrop-blur-sm shadow-sm hover:shadow-md",
            )}
            title="Remove track"
          >
            <Trash2 className="h-3 w-3" />
          </button>

          {track.audioBuffer ? (
            <>
              {/* Waveform Canvas */}
              <canvas
                ref={canvasRef}
                className="absolute inset-0 w-full h-full cursor-pointer"
                onMouseDown={handleCanvasMouseDown}
                onMouseMove={handleCanvasMouseMove}
                onMouseUp={handleCanvasMouseUp}
              />
            </>
          ) : (
            !track.collapsed && (
              <>
                {/* Empty state - clickable area for upload with drag & drop */}
                <div
                  className={cn(
                    "absolute inset-0 w-full h-full transition-colors cursor-pointer",
                    isDragging
                      ? "bg-primary/20 border-2 border-primary border-dashed"
                      : "hover:bg-accent/50",
                  )}
                  onClick={(e) => {
                    e.stopPropagation();
                    handleLoadAudioClick();
                  }}
                  onDragOver={handleDragOver}
                  onDragLeave={handleDragLeave}
                  onDrop={handleDrop}
                />
                <input
                  ref={fileInputRef}
                  type="file"
                  accept="audio/*"
                  onChange={handleFileChange}
                  className="hidden"
                />
              </>
            )
          )}
        </div>

        {/* Import Dialog - Also needed in waveform-only mode */}
        <ImportDialog
          open={showImportDialog}
          onClose={handleImportCancel}
          onImport={handleImport}
          fileName={pendingFile?.name}
          sampleRate={fileMetadata.sampleRate}
          channels={fileMetadata.channels}
        />
      </div>
    );
  }

  // Render full track (both controls and waveform side by side)
  // This mode is no longer used - tracks are rendered separately with renderControlsOnly and renderWaveformOnly
  return (
    <div
      ref={containerRef}
      className={cn(
        "flex flex-col transition-all duration-200 relative",
        isSelected && "bg-primary/5",
      )}
    >
      {/* Full track content removed - now rendered separately in TrackList */}
      <div>Track component should not be rendered in full mode anymore</div>
    </div>
  );
}