feat: splits working code

1 files changed, 77 insertions, 879 deletions

diff --git a/apps/web/src/components/editor/timeline.tsx b/apps/web/src/components/editor/timeline.tsx
index 1ea41c70..932896f4 100644
--- a/apps/web/src/components/editor/timeline.tsx
+++ b/apps/web/src/components/editor/timeline.tsx
@@ -1,61 +1,19 @@
 "use client";
 
-import { ScrollArea } from "../ui/scroll-area";
-import { Button } from "../ui/button";
-import {
-  Scissors,
-  ArrowLeftToLine,
-  ArrowRightToLine,
-  Trash2,
-  Snowflake,
-  Copy,
-  SplitSquareHorizontal,
-  Pause,
-  Play,
-  Video,
-  Music,
-  TypeIcon,
-  Lock,
-  LockOpen,
-  Plus,
-} from "lucide-react";
-import {
-  Tooltip,
-  TooltipContent,
-  TooltipTrigger,
-  TooltipProvider,
-} from "../ui/tooltip";
-import {
-  ContextMenu,
-  ContextMenuContent,
-  ContextMenuItem,
-  ContextMenuTrigger,
-} from "../ui/context-menu";
+import { useState, useRef, useEffect, useCallback } from "react";
 import { useTimelineStore } from "@/stores/timeline-store";
-import { useMediaStore } from "@/stores/media-store";
 import { usePlaybackStore } from "@/stores/playback-store";
-import { useProjectStore } from "@/stores/project-store";
 import { useTimelineZoom } from "@/hooks/use-timeline-zoom";
-import { processMediaFiles } from "@/lib/media-processing";
-import { toast } from "sonner";
-import { useState, useRef, useEffect, useCallback, Fragment } from "react";
-import { TimelineTrackContent } from "./timeline-track";
-import {
-  TimelinePlayhead,
-  useTimelinePlayheadRuler,
-} from "./timeline-playhead";
-import { SelectionBox } from "./selection-box";
 import { useSelectionBox } from "@/hooks/use-selection-box";
-import { SnapIndicator } from "./snap-indicator";
 import { SnapPoint } from "@/hooks/use-timeline-snapping";
-import type { DragData, TimelineTrack } from "@/types/timeline";
-import {
-  getTrackHeight,
-  getCumulativeHeightBefore,
-  getTotalTracksHeight,
-  TIMELINE_CONSTANTS,
-  snapTimeToFrame,
-} from "@/constants/timeline-constants";
+import { TIMELINE_CONSTANTS } from "@/constants/timeline-constants";
+import { TimelineToolbar } from "./timeline/timeline-toolbar";
+import { TimelineContent } from "./timeline/timeline-content";
+import { useTimelineDragHandlers } from "./timeline/timeline-drag-handlers";
+import { useTimelineActionHandlers } from "./timeline/timeline-action-handlers";
+import { useTimelineScrollSync } from "./timeline/timeline-scroll-sync";
+import { useTimelineContentClick } from "./timeline/timeline-content-click";
+import { useTimelineWheelHandler } from "./timeline/timeline-wheel-handler";
 
 export function Timeline() {
   // Timeline shows all tracks (video, audio, effects) and their elements.
@@ -64,32 +22,17 @@ export function Timeline() {
 
   const {
     tracks,
-    addTrack,
-    addElementToTrack,
-    removeElementFromTrack,
     getTotalDuration,
     selectedElements,
     clearSelectedElements,
     setSelectedElements,
-    splitElement,
-    splitAndKeepLeft,
-    splitAndKeepRight,
-    toggleTrackMute,
-    separateAudio,
-    undo,
-    redo,
-    snappingEnabled,
-    toggleSnapping,
     dragState,
+    snappingEnabled,
   } = useTimelineStore();
-  const { mediaItems, addMediaItem } = useMediaStore();
-  const { activeProject } = useProjectStore();
-  const { currentTime, duration, seek, setDuration, isPlaying, toggle } =
-    usePlaybackStore();
+  const { currentTime, duration, seek, setDuration } = usePlaybackStore();
   const [isDragOver, setIsDragOver] = useState(false);
   const [isProcessing, setIsProcessing] = useState(false);
   const [progress, setProgress] = useState(0);
-  const dragCounterRef = useRef(0);
   const timelineRef = useRef<HTMLDivElement>(null);
   const rulerRef = useRef<HTMLDivElement>(null);
   const [isInTimeline, setIsInTimeline] = useState(false);
@@ -100,8 +43,6 @@ export function Timeline() {
     isInTimeline,
   });
 
-  // Old marquee selection removed - using new SelectionBox component instead
-
   // Dynamic timeline width calculation based on playhead position and duration
   const dynamicTimelineWidth = Math.max(
     (duration || 0) * TIMELINE_CONSTANTS.PIXELS_PER_SECOND * zoomLevel, // Base width from duration
@@ -115,22 +56,6 @@ export function Timeline() {
   const trackLabelsRef = useRef<HTMLDivElement>(null);
   const playheadRef = useRef<HTMLDivElement>(null);
   const trackLabelsScrollRef = useRef<HTMLDivElement>(null);
-  const isUpdatingRef = useRef(false);
-  const lastRulerSync = useRef(0);
-  const lastTracksSync = useRef(0);
-  const lastVerticalSync = useRef(0);
-
-  // Timeline playhead ruler handlers
-  const { handleRulerMouseDown } = useTimelinePlayheadRuler({
-    currentTime,
-    duration,
-    zoomLevel,
-    seek,
-    rulerRef,
-    rulerScrollRef,
-    tracksScrollRef,
-    playheadRef,
-  });
 
   // Selection box functionality
   const tracksContainerRef = useRef<HTMLDivElement>(null);
@@ -160,98 +85,18 @@ export function Timeline() {
     setCurrentSnapPoint(snapPoint);
   }, []);
 
-  // Timeline content click to seek handler
-  const handleTimelineContentClick = useCallback(
-    (e: React.MouseEvent) => {
-      console.log(
-        JSON.stringify({
-          timelineClick: {
-            isSelecting,
-            justFinishedSelecting,
-            willReturn: isSelecting || justFinishedSelecting,
-          },
-        })
-      );
-
-      // Don't seek if this was a selection box operation
-      if (isSelecting || justFinishedSelecting) {
-        return;
-      }
-
-      // Don't seek if clicking on timeline elements, but still deselect
-      if ((e.target as HTMLElement).closest(".timeline-element")) {
-        return;
-      }
-
-      // Don't seek if clicking on playhead
-      if (playheadRef.current?.contains(e.target as Node)) {
-        return;
-      }
-
-      // Don't seek if clicking on track labels
-      if ((e.target as HTMLElement).closest("[data-track-labels]")) {
-        clearSelectedElements();
-        return;
-      }
-
-      // Clear selected elements when clicking empty timeline area
-      console.log(JSON.stringify({ clearingSelectedElements: true }));
-      clearSelectedElements();
-
-      // Determine if we're clicking in ruler or tracks area
-      const isRulerClick = (e.target as HTMLElement).closest(
-        "[data-ruler-area]"
-      );
-
-      let mouseX: number;
-      let scrollLeft = 0;
-
-      if (isRulerClick) {
-        // Calculate based on ruler position
-        const rulerContent = rulerScrollRef.current?.querySelector(
-          "[data-radix-scroll-area-viewport]"
-        ) as HTMLElement;
-        if (!rulerContent) return;
-        const rect = rulerContent.getBoundingClientRect();
-        mouseX = e.clientX - rect.left;
-        scrollLeft = rulerContent.scrollLeft;
-      } else {
-        // Calculate based on tracks content position
-        const tracksContent = tracksScrollRef.current?.querySelector(
-          "[data-radix-scroll-area-viewport]"
-        ) as HTMLElement;
-        if (!tracksContent) return;
-        const rect = tracksContent.getBoundingClientRect();
-        mouseX = e.clientX - rect.left;
-        scrollLeft = tracksContent.scrollLeft;
-      }
-
-      const rawTime = Math.max(
-        0,
-        Math.min(
-          duration,
-          (mouseX + scrollLeft) /
-          (TIMELINE_CONSTANTS.PIXELS_PER_SECOND * zoomLevel)
-        )
-      );
-
-      // Use frame snapping for timeline clicking
-      const projectFps = activeProject?.fps || 30;
-      const time = snapTimeToFrame(rawTime, projectFps);
-
-      seek(time);
-    },
-    [
-      duration,
-      zoomLevel,
-      seek,
-      rulerScrollRef,
-      tracksScrollRef,
-      clearSelectedElements,
-      isSelecting,
-      justFinishedSelecting,
-    ]
-  );
+  // Timeline content click handler
+  const { handleTimelineContentClick } = useTimelineContentClick({
+    duration,
+    zoomLevel,
+    seek,
+    rulerScrollRef,
+    tracksScrollRef,
+    clearSelectedElements,
+    isSelecting,
+    justFinishedSelecting,
+    playheadRef,
+  });
 
   // Update timeline duration when tracks change
   useEffect(() => {
@@ -259,348 +104,40 @@ export function Timeline() {
     setDuration(Math.max(totalDuration, 10)); // Minimum 10 seconds for empty timeline
   }, [tracks, setDuration, getTotalDuration]);
 
-  // Old marquee system removed - using new SelectionBox component instead
-
-  const handleDragEnter = (e: React.DragEvent) => {
-    // When something is dragged over the timeline, show overlay
-    e.preventDefault();
-    // Don't show overlay for timeline elements - they're handled by tracks
-    if (e.dataTransfer.types.includes("application/x-timeline-element")) {
-      return;
-    }
-    dragCounterRef.current += 1;
-    if (!isDragOver) {
-      setIsDragOver(true);
-    }
-  };
-
-  const handleDragOver = (e: React.DragEvent) => {
-    e.preventDefault();
-  };
-
-  const handleDragLeave = (e: React.DragEvent) => {
-    e.preventDefault();
-
-    // Don't update state for timeline elements - they're handled by tracks
-    if (e.dataTransfer.types.includes("application/x-timeline-element")) {
-      return;
-    }
-
-    dragCounterRef.current -= 1;
-    if (dragCounterRef.current === 0) {
-      setIsDragOver(false);
-    }
-  };
-
-  const handleDrop = async (e: React.DragEvent) => {
-    // When media is dropped, add it as a new track/element
-    e.preventDefault();
-    setIsDragOver(false);
-    dragCounterRef.current = 0;
-
-    // Ignore timeline element drags - they're handled by track-specific handlers
-    const hasTimelineElement = e.dataTransfer.types.includes(
-      "application/x-timeline-element"
-    );
-    if (hasTimelineElement) {
-      return;
-    }
-
-    const itemData = e.dataTransfer.getData("application/x-media-item");
-    if (itemData) {
-      try {
-        const dragData: DragData = JSON.parse(itemData);
-
-        if (dragData.type === "text") {
-          // Always create new text track to avoid overlaps
-          useTimelineStore.getState().addTextToNewTrack(dragData);
-        } else {
-          // Handle media items
-          const mediaItem = mediaItems.find(
-            (item: any) => item.id === dragData.id
-          );
-          if (!mediaItem) {
-            toast.error("Media item not found");
-            return;
-          }
-
-          useTimelineStore.getState().addMediaToNewTrack(mediaItem);
-        }
-      } catch (error) {
-        console.error("Error parsing dropped item data:", error);
-        toast.error("Failed to add item to timeline");
-      }
-    } else if (e.dataTransfer.files?.length > 0) {
-      // Handle file drops by creating new tracks
-      if (!activeProject) {
-        toast.error("No active project");
-        return;
-      }
-
-      setIsProcessing(true);
-      setProgress(0);
-      try {
-        const processedItems = await processMediaFiles(
-          e.dataTransfer.files,
-          (p) => setProgress(p)
-        );
-        for (const processedItem of processedItems) {
-          await addMediaItem(activeProject.id, processedItem);
-          const currentMediaItems = useMediaStore.getState().mediaItems;
-          const addedItem = currentMediaItems.find(
-            (item) =>
-              item.name === processedItem.name && item.url === processedItem.url
-          );
-          if (addedItem) {
-            useTimelineStore.getState().addMediaToNewTrack(addedItem);
-          }
-        }
-      } catch (error) {
-        // Show error if file processing fails
-        console.error("Error processing external files:", error);
-        toast.error("Failed to process dropped files");
-      } finally {
-        setIsProcessing(false);
-        setProgress(0);
-      }
-    }
-  };
-
-  const dragProps = {
-    onDragEnter: handleDragEnter,
-    onDragOver: handleDragOver,
-    onDragLeave: handleDragLeave,
-    onDrop: handleDrop,
-  };
-
-  // Action handlers for toolbar
-  const handleSplitSelected = () => {
-    if (selectedElements.length === 0) {
-      toast.error("No elements selected");
-      return;
-    }
-    let splitCount = 0;
-    selectedElements.forEach(({ trackId, elementId }) => {
-      const track = tracks.find((t) => t.id === trackId);
-      const element = track?.elements.find((c) => c.id === elementId);
-      if (element && track) {
-        const effectiveStart = element.startTime;
-        const effectiveEnd =
-          element.startTime +
-          (element.duration - element.trimStart - element.trimEnd);
-
-        if (currentTime > effectiveStart && currentTime < effectiveEnd) {
-          const newElementId = splitElement(trackId, elementId, currentTime);
-          if (newElementId) splitCount++;
-        }
-      }
-    });
-    if (splitCount === 0) {
-      toast.error("Playhead must be within selected elements to split");
-    }
-  };
-
-  const handleDuplicateSelected = () => {
-    if (selectedElements.length === 0) {
-      toast.error("No elements selected");
-      return;
-    }
-    const canDuplicate = selectedElements.length === 1;
-    if (!canDuplicate) return;
-
-    const newSelections: { trackId: string; elementId: string }[] = [];
-
-    selectedElements.forEach(({ trackId, elementId }) => {
-      const track = tracks.find((t) => t.id === trackId);
-      const element = track?.elements.find((el) => el.id === elementId);
-
-      if (element) {
-        const newStartTime =
-          element.startTime +
-          (element.duration - element.trimStart - element.trimEnd) +
-          0.1;
-
-        // Create element without id (will be generated by store)
-        const { id, ...elementWithoutId } = element;
-
-        addElementToTrack(trackId, {
-          ...elementWithoutId,
-          startTime: newStartTime,
-        });
-
-        // We can't predict the new id, so just clear selection for now
-        // TODO: addElementToTrack could return the new element id
-      }
-    });
-
-    clearSelectedElements();
-  };
-
-  const handleFreezeSelected = () => {
-    toast.info("Freeze frame functionality coming soon!");
-  };
-
-  const handleSplitAndKeepLeft = () => {
-    if (selectedElements.length !== 1) {
-      toast.error("Select exactly one element");
-      return;
-    }
-    const { trackId, elementId } = selectedElements[0];
-    const track = tracks.find((t) => t.id === trackId);
-    const element = track?.elements.find((c) => c.id === elementId);
-    if (!element) return;
-    const effectiveStart = element.startTime;
-    const effectiveEnd =
-      element.startTime +
-      (element.duration - element.trimStart - element.trimEnd);
-    if (currentTime <= effectiveStart || currentTime >= effectiveEnd) {
-      toast.error("Playhead must be within selected element");
-      return;
-    }
-    splitAndKeepLeft(trackId, elementId, currentTime);
-  };
-
-  const handleSplitAndKeepRight = () => {
-    if (selectedElements.length !== 1) {
-      toast.error("Select exactly one element");
-      return;
-    }
-    const { trackId, elementId } = selectedElements[0];
-    const track = tracks.find((t) => t.id === trackId);
-    const element = track?.elements.find((c) => c.id === elementId);
-    if (!element) return;
-    const effectiveStart = element.startTime;
-    const effectiveEnd =
-      element.startTime +
-      (element.duration - element.trimStart - element.trimEnd);
-    if (currentTime <= effectiveStart || currentTime >= effectiveEnd) {
-      toast.error("Playhead must be within selected element");
-      return;
-    }
-    splitAndKeepRight(trackId, elementId, currentTime);
-  };
-
-  const handleSeparateAudio = () => {
-    if (selectedElements.length !== 1) {
-      toast.error("Select exactly one media element to separate audio");
-      return;
-    }
-    const { trackId, elementId } = selectedElements[0];
-    const track = tracks.find((t) => t.id === trackId);
-    if (!track || track.type !== "media") {
-      toast.error("Select a media element to separate audio");
-      return;
-    }
-    separateAudio(trackId, elementId);
-  };
-
-  const handleDeleteSelected = () => {
-    if (selectedElements.length === 0) {
-      toast.error("No elements selected");
-      return;
-    }
-    selectedElements.forEach(({ trackId, elementId }) => {
-      removeElementFromTrack(trackId, elementId);
-    });
-    clearSelectedElements();
-  };
-
-  // --- Scroll synchronization effect ---
-  useEffect(() => {
-    const rulerViewport = rulerScrollRef.current?.querySelector(
-      "[data-radix-scroll-area-viewport]"
-    ) as HTMLElement;
-    const tracksViewport = tracksScrollRef.current?.querySelector(
-      "[data-radix-scroll-area-viewport]"
-    ) as HTMLElement;
-    const trackLabelsViewport = trackLabelsScrollRef.current?.querySelector(
-      "[data-radix-scroll-area-viewport]"
-    ) as HTMLElement;
-
-    if (!rulerViewport || !tracksViewport) return;
-
-    // Horizontal scroll synchronization between ruler and tracks
-    const handleRulerScroll = () => {
-      const now = Date.now();
-      if (isUpdatingRef.current || now - lastRulerSync.current < 16) return;
-      lastRulerSync.current = now;
-      isUpdatingRef.current = true;
-      tracksViewport.scrollLeft = rulerViewport.scrollLeft;
-      isUpdatingRef.current = false;
-    };
-    const handleTracksScroll = () => {
-      const now = Date.now();
-      if (isUpdatingRef.current || now - lastTracksSync.current < 16) return;
-      lastTracksSync.current = now;
-      isUpdatingRef.current = true;
-      rulerViewport.scrollLeft = tracksViewport.scrollLeft;
-      isUpdatingRef.current = false;
-    };
-
-    rulerViewport.addEventListener("scroll", handleRulerScroll);
-    tracksViewport.addEventListener("scroll", handleTracksScroll);
-
-    // Vertical scroll synchronization between track labels and tracks content
-    if (trackLabelsViewport) {
-      const handleTrackLabelsScroll = () => {
-        const now = Date.now();
-        if (isUpdatingRef.current || now - lastVerticalSync.current < 16)
-          return;
-        lastVerticalSync.current = now;
-        isUpdatingRef.current = true;
-        tracksViewport.scrollTop = trackLabelsViewport.scrollTop;
-        isUpdatingRef.current = false;
-      };
-      const handleTracksVerticalScroll = () => {
-        const now = Date.now();
-        if (isUpdatingRef.current || now - lastVerticalSync.current < 16)
-          return;
-        lastVerticalSync.current = now;
-        isUpdatingRef.current = true;
-        trackLabelsViewport.scrollTop = tracksViewport.scrollTop;
-        isUpdatingRef.current = false;
-      };
-
-      trackLabelsViewport.addEventListener("scroll", handleTrackLabelsScroll);
-      tracksViewport.addEventListener("scroll", handleTracksVerticalScroll);
-
-      return () => {
-        rulerViewport.removeEventListener("scroll", handleRulerScroll);
-        tracksViewport.removeEventListener("scroll", handleTracksScroll);
-        trackLabelsViewport.removeEventListener(
-          "scroll",
-          handleTrackLabelsScroll
-        );
-        tracksViewport.removeEventListener(
-          "scroll",
-          handleTracksVerticalScroll
-        );
-      };
-    }
-
-    return () => {
-      rulerViewport.removeEventListener("scroll", handleRulerScroll);
-      tracksViewport.removeEventListener("scroll", handleTracksScroll);
-    };
-  }, []);
-
-  // Add wheel event listeners with passive: false to allow preventDefault
-  useEffect(() => {
-    const timelineContainer = timelineRef.current;
-    if (!timelineContainer || !isInTimeline) return;
+  // Drag handlers
+  const { dragProps } = useTimelineDragHandlers({
+    isDragOver,
+    setIsDragOver,
+    isProcessing,
+    setIsProcessing,
+    progress,
+    setProgress,
+  });
 
-    const handleWheelCapture = (e: WheelEvent) => {
-      // Call the existing handleWheel function
-      handleWheel(e as any);
-    };
+  // Action handlers
+  const {
+    handleSplitSelected,
+    handleDuplicateSelected,
+    handleFreezeSelected,
+    handleSplitAndKeepLeft,
+    handleSplitAndKeepRight,
+    handleSeparateAudio,
+    handleDeleteSelected,
+  } = useTimelineActionHandlers();
 
-    // Add wheel event listener with passive: false to allow preventDefault
-    timelineContainer.addEventListener("wheel", handleWheelCapture, { passive: false });
+  // Scroll synchronization
+  useTimelineScrollSync({
+    rulerScrollRef,
+    tracksScrollRef,
+    trackLabelsScrollRef,
+  });
 
-    return () => {
-      timelineContainer.removeEventListener("wheel", handleWheelCapture);
-    };
-  }, [handleWheel, isInTimeline]);
+  // Wheel event handling
+  useTimelineWheelHandler({
+    timelineRef,
+    isInTimeline,
+    handleWheel,
+  });
 
   return (
     <div
@@ -610,174 +147,17 @@ export function Timeline() {
       onMouseLeave={() => setIsInTimeline(false)}
     >
       {/* Toolbar */}
-      <div className="border-b flex items-center justify-between px-2 py-1 bg-card z-90">
-        <div className="flex items-center gap-1 w-full">
-          <TooltipProvider delayDuration={500}>
-            <Tooltip>
-              <TooltipTrigger asChild>
-                <Button
-                  variant="text"
-                  size="icon"
-                  onClick={toggle}
-                  className="mr-2"
-                >
-                  {isPlaying ? (
-                    <Pause className="h-4 w-4" />
-                  ) : (
-                    <Play className="h-4 w-4" />
-                  )}
-                </Button>
-              </TooltipTrigger>
-              <TooltipContent>
-                {isPlaying ? "Pause (Space)" : "Play (Space)"}
-              </TooltipContent>
-            </Tooltip>
-            <div className="w-px h-6 bg-border mx-1" />
-            <div
-              className="text-xs text-muted-foreground font-mono px-2"
-              style={{ minWidth: "18ch", textAlign: "center" }}
-            >
-              {currentTime.toFixed(1)}s / {duration.toFixed(1)}s
-            </div>
-            {tracks.length === 0 && (
-              <>
-                <div className="w-px h-6 bg-border mx-1" />
-                <Tooltip>
-                  <TooltipTrigger asChild>
-                    <Button
-                      variant="outline"
-                      size="sm"
-                      onClick={() => {
-                        const trackId = addTrack("media");
-                        addElementToTrack(trackId, {
-                          type: "media",
-                          mediaId: "test",
-                          name: "Test Clip",
-                          duration: TIMELINE_CONSTANTS.DEFAULT_TEXT_DURATION,
-                          startTime: 0,
-                          trimStart: 0,
-                          trimEnd: 0,
-                        });
-                      }}
-                      className="text-xs"
-                    >
-                      Add Test Clip
-                    </Button>
-                  </TooltipTrigger>
-                  <TooltipContent>
-                    Add a test clip to try playback
-                  </TooltipContent>
-                </Tooltip>
-              </>
-            )}
-            <div className="w-px h-6 bg-border mx-1" />
-            <Tooltip>
-              <TooltipTrigger asChild>
-                <Button
-                  variant="text"
-                  size="icon"
-                  onClick={handleSplitSelected}
-                >
-                  <Scissors className="h-4 w-4" />
-                </Button>
-              </TooltipTrigger>
-              <TooltipContent>Split element (Ctrl+S)</TooltipContent>
-            </Tooltip>
-            <Tooltip>
-              <TooltipTrigger asChild>
-                <Button
-                  variant="text"
-                  size="icon"
-                  onClick={handleSplitAndKeepLeft}
-                >
-                  <ArrowLeftToLine className="h-4 w-4" />
-                </Button>
-              </TooltipTrigger>
-              <TooltipContent>Split and keep left (Ctrl+Q)</TooltipContent>
-            </Tooltip>
-            <Tooltip>
-              <TooltipTrigger asChild>
-                <Button
-                  variant="text"
-                  size="icon"
-                  onClick={handleSplitAndKeepRight}
-                >
-                  <ArrowRightToLine className="h-4 w-4" />
-                </Button>
-              </TooltipTrigger>
-              <TooltipContent>Split and keep right (Ctrl+W)</TooltipContent>
-            </Tooltip>
-            <Tooltip>
-              <TooltipTrigger asChild>
-                <Button
-                  variant="text"
-                  size="icon"
-                  onClick={handleSeparateAudio}
-                >
-                  <SplitSquareHorizontal className="h-4 w-4" />
-                </Button>
-              </TooltipTrigger>
-              <TooltipContent>Separate audio (Ctrl+D)</TooltipContent>
-            </Tooltip>
-            <Tooltip>
-              <TooltipTrigger asChild>
-                <Button
-                  variant="text"
-                  size="icon"
-                  onClick={handleDuplicateSelected}
-                >
-                  <Copy className="h-4 w-4" />
-                </Button>
-              </TooltipTrigger>
-              <TooltipContent>Duplicate element (Ctrl+D)</TooltipContent>
-            </Tooltip>
-            <Tooltip>
-              <TooltipTrigger asChild>
-                <Button
-                  variant="text"
-                  size="icon"
-                  onClick={handleFreezeSelected}
-                >
-                  <Snowflake className="h-4 w-4" />
-                </Button>
-              </TooltipTrigger>
-              <TooltipContent>Freeze frame (F)</TooltipContent>
-            </Tooltip>
-            <Tooltip>
-              <TooltipTrigger asChild>
-                <Button
-                  variant="text"
-                  size="icon"
-                  onClick={handleDeleteSelected}
-                >
-                  <Trash2 className="h-4 w-4" />
-                </Button>
-              </TooltipTrigger>
-              <TooltipContent>Delete element (Delete)</TooltipContent>
-            </Tooltip>
-          </TooltipProvider>
-        </div>
-        <div className="flex items-center gap-1">
-          <TooltipProvider delayDuration={500}>
-            <Tooltip>
-              <TooltipTrigger asChild>
-                <Button variant="text" size="icon" onClick={toggleSnapping}>
-                  {snappingEnabled ? (
-                    <Lock className="h-4 w-4" />
-                  ) : (
-                    <LockOpen className="h-4 w-4 text-primary" />
-                  )}
-                </Button>
-              </TooltipTrigger>
-              <TooltipContent>Auto snapping</TooltipContent>
-            </Tooltip>
-          </TooltipProvider>
-        </div>
-      </div>
+      <TimelineToolbar
+        handleSplitSelected={handleSplitSelected}
+        handleSplitAndKeepLeft={handleSplitAndKeepLeft}
+        handleSplitAndKeepRight={handleSplitAndKeepRight}
+        handleSeparateAudio={handleSeparateAudio}
+        handleDuplicateSelected={handleDuplicateSelected}
+        handleFreezeSelected={handleFreezeSelected}
+        handleDeleteSelected={handleDeleteSelected}
+      />
 
       {/* Timeline Container */}
-
-      {/* Timeline Container with Grid Layout */}
       <div
         ref={timelineRef}
         className="relative h-full w-full overflow-auto border"
@@ -786,211 +166,29 @@ export function Timeline() {
         onMouseDown={handleSelectionMouseDown}
         onClick={handleTimelineContentClick}
       >
-        <div className="min-w-max min-h-max" style={{ minWidth: `${dynamicTimelineWidth}px` }}>
-          <div className={`grid grid-cols-[192px_1fr] ${tracks.length > 0 ? `grid-rows-[20px_repeat(${tracks.length},minmax(0,max-content))]` : 'grid-rows-[20px_1fr]'}`}>
-
-            {/* Top-Left Corner (Empty space above track labels) */}
-            <div className="sticky top-0 left-0 border-inset bg-card/[0.99]"></div>
-
-            {/* Top Row (Sticky Ruler Header) */}
-            <div
-              className="sticky top-0 bg-card/[0.99] border-b border-muted/30 z-[95]"
-              onMouseDown={handleSelectionMouseDown}
-              onClick={handleTimelineContentClick}
-              data-ruler-area
-            >
-              <div
-                ref={rulerRef}
-                className="relative h-5 select-none cursor-default pb-1 z-[95]"
-                onMouseDown={handleRulerMouseDown}
-              >
-                {(() => {
-                  // Calculate appropriate time interval based on zoom level
-                  const getTimeInterval = (zoom: number) => {
-                    const pixelsPerSecond =
-                      TIMELINE_CONSTANTS.PIXELS_PER_SECOND * zoom;
-                    if (pixelsPerSecond >= 200) return 0.1; // Every 0.1s when very zoomed in
-                    if (pixelsPerSecond >= 100) return 0.5; // Every 0.5s when zoomed in
-                    if (pixelsPerSecond >= 50) return 1; // Every 1s at normal zoom
-                    if (pixelsPerSecond >= 25) return 2; // Every 2s when zoomed out
-                    if (pixelsPerSecond >= 12) return 5; // Every 5s when more zoomed out
-                    if (pixelsPerSecond >= 6) return 10; // Every 10s when very zoomed out
-                    return 30; // Every 30s when extremely zoomed out
-                  };
-
-                  const interval = getTimeInterval(zoomLevel);
-                  const markerCount = Math.ceil(duration / interval) + 1;
-
-                  return Array.from({ length: markerCount }, (_, i) => {
-                    const time = i * interval;
-                    if (time > duration) return null;
-
-                    const isMainMarker =
-                      time % (interval >= 1 ? Math.max(1, interval) : 1) === 0;
-
-                    return (
-                      <div
-                        key={i}
-                        className={`absolute top-0 bottom-0 z-[95] ${isMainMarker
-                          ? "border-l border-muted-foreground/40"
-                          : "border-l border-muted-foreground/20"
-                          }`}
-                        style={{
-                          left: `${time * TIMELINE_CONSTANTS.PIXELS_PER_SECOND * zoomLevel}px`,
-                        }}
-                      >
-                        <span
-                          className={`absolute top-1 left-1 text-[0.6rem] z-[95] ${isMainMarker
-                            ? "text-muted-foreground font-medium"
-                            : "text-muted-foreground/70"
-                            }`}
-                        >
-
-                          {(() => {
-                            const formatTime = (seconds: number) => {
-                              const hours = Math.floor(seconds / 3600);
-                              const minutes = Math.floor((seconds % 3600) / 60);
-                              const secs = seconds % 60;
-
-                              if (hours > 0) {
-                                return `${hours}:${minutes.toString().padStart(2, "0")}:${Math.floor(secs).toString().padStart(2, "0")}`;
-                              } else if (minutes > 0) {
-                                return `${minutes}:${Math.floor(secs).toString().padStart(2, "0")}`;
-                              } else if (interval >= 1) {
-                                return `${Math.floor(secs)}s`;
-                              } else {
-                                return `${secs.toFixed(1)}s`;
-                              }
-                            };
-                            return formatTime(time);
-                          })()}
-                        </span>
-                      </div>
-                    );
-                  }).filter(Boolean);
-                })()}
-              </div>
-            </div>
-
-            {/* Track Rows */}
-            {tracks.map((track, index) => (
-              <Fragment key={track.id}>
-                {/* Left Column (Sticky Track Labels) */}
-                <div
-                  className="sticky left-0 flex items-center border-b border-panel border-inset group bg-card/[0.99] z-[90]"
-                  style={{ height: `${getTrackHeight(track.type)}px` }}
-                >
-                  <div className="flex items-center gap-2 px-2">
-                    <TrackIcon track={track} />
-                  </div>
-                  {track.muted && (
-                    <span className="text-xs text-red-500 font-semibold">
-                      Muted
-                    </span>
-                  )}
-                </div>
-
-                {/* Scrollable Track Content */}
-                <ContextMenu>
-                  <ContextMenuTrigger asChild>
-                    <div
-                      className=" h-full"
-                      onClick={(e) => {
-                        // If clicking empty area (not on a element), deselect all elements
-                        if (
-                          !(e.target as HTMLElement).closest(
-                            ".timeline-element"
-                          )
-                        ) {
-                          clearSelectedElements();
-                        }
-                      }}
-                    >
-                      <TimelineTrackContent
-                        track={track}
-                        zoomLevel={zoomLevel}
-                        onSnapPointChange={handleSnapPointChange}
-                      />
-                    </div>
-                  </ContextMenuTrigger>
-                  <ContextMenuContent>
-                    <ContextMenuItem
-                      onClick={() => toggleTrackMute(track.id)}
-                    >
-                      {track.muted ? "Unmute Track" : "Mute Track"}
-                    </ContextMenuItem>
-                    <ContextMenuItem>
-                      Track settings (soon)
-                    </ContextMenuItem>
-                  </ContextMenuContent>
-                </ContextMenu>
-              </Fragment>
-            ))}
-            {/* Add Track Button - spans full width */}
-            <div
-              onClick={() => addTrack('media')}
-              className="col-span-1 sticky left-0 w-full flex items-center border-b border-muted bg-card/[0.99] hover:bg-card/50 transition-colors cursor-pointer z-[89]"
-              style={{ height: `${getTrackHeight("media")}px` }}
-            >
-              <div className="w-full flex  justify-center items-center">
-                <Plus className="w-4 h-4 text-muted-foreground" />
-              </div>
-            </div>
-          </div>
-        </div>
-
-        {/* Overlay Components */}
-        <SelectionBox
-          startPos={selectionBox?.startPos || null}
-          currentPos={selectionBox?.currentPos || null}
-          containerRef={tracksContainerRef}
-          isActive={selectionBox?.isActive || false}
-        />
-
-        <TimelinePlayhead
-          currentTime={currentTime}
+        <TimelineContent
+          dynamicTimelineWidth={dynamicTimelineWidth}
+          tracks={tracks}
           duration={duration}
           zoomLevel={zoomLevel}
-          tracks={tracks}
+          currentTime={currentTime}
           seek={seek}
           rulerRef={rulerRef}
           rulerScrollRef={rulerScrollRef}
           tracksScrollRef={tracksScrollRef}
-          trackLabelsRef={trackLabelsRef}
-          timelineRef={timelineRef}
           playheadRef={playheadRef}
-          isSnappingToPlayhead={
-            showSnapIndicator && currentSnapPoint?.type === "playhead"
-          }
-        />
-
-        <SnapIndicator
-          snapPoint={currentSnapPoint}
-          zoomLevel={zoomLevel}
-          tracks={tracks}
-          timelineRef={timelineRef}
           trackLabelsRef={trackLabelsRef}
-          isVisible={showSnapIndicator}
+          timelineRef={timelineRef}
+          handleSelectionMouseDown={handleSelectionMouseDown}
+          handleTimelineContentClick={handleTimelineContentClick}
+          handleSnapPointChange={handleSnapPointChange}
+          clearSelectedElements={clearSelectedElements}
+          selectionBox={selectionBox}
+          tracksContainerRef={tracksContainerRef}
+          currentSnapPoint={currentSnapPoint}
+          showSnapIndicator={showSnapIndicator}
         />
       </div>
-
-
-      </div>
-  );
-}
-
-function TrackIcon({ track }: { track: TimelineTrack }) {
-  return (
-    <>
-      {track.type === "media" && (
-        <Video className="w-4 h-4 flex-shrink-0 text-muted-foreground" />
-      )}
-      {track.type === "text" && (
-        <TypeIcon className="w-4 h-4 flex-shrink-0 text-muted-foreground" />
-      )}
-      {track.type === "audio" && (
-        <Music className="w-4 h-4 flex-shrink-0 text-muted-foreground" />
-      )}
-    </>
+    </div>
   );
 }