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import { useEffect, useCallback } from "react";
import { usePlaybackStore } from "@/stores/playback-store";
import { useTimelineStore } from "@/stores/timeline-store";
import { toast } from "sonner";
export const usePlaybackControls = () => {
const { isPlaying, currentTime, play, pause, seek } = usePlaybackStore();
const {
selectedElements,
tracks,
splitElement,
splitAndKeepLeft,
splitAndKeepRight,
separateAudio,
} = useTimelineStore();
const handleSplitSelectedElement = useCallback(() => {
if (selectedElements.length !== 1) {
toast.error("Select exactly one element to split");
return;
}
const { trackId, elementId } = selectedElements[0];
const track = tracks.find((t) => t.id === trackId);
const element = track?.elements.find((e) => e.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;
}
splitElement(trackId, elementId, currentTime);
}, [selectedElements, tracks, currentTime, splitElement]);
const handleSplitAndKeepLeftCallback = useCallback(() => {
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((e) => e.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);
}, [selectedElements, tracks, currentTime, splitAndKeepLeft]);
const handleSplitAndKeepRightCallback = useCallback(() => {
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((e) => e.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);
}, [selectedElements, tracks, currentTime, splitAndKeepRight]);
const handleSeparateAudioCallback = useCallback(() => {
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);
}, [selectedElements, tracks, separateAudio]);
const handleKeyPress = useCallback(
(e: KeyboardEvent) => {
if (
e.target instanceof HTMLInputElement ||
e.target instanceof HTMLTextAreaElement
) {
return;
}
switch (e.key) {
case " ":
e.preventDefault();
if (isPlaying) {
pause();
} else {
play();
}
break;
case "s":
if (e.ctrlKey || e.metaKey) {
e.preventDefault();
handleSplitSelectedElement();
}
break;
case "q":
if (e.ctrlKey || e.metaKey) {
e.preventDefault();
handleSplitAndKeepLeftCallback();
}
break;
case "w":
if (e.ctrlKey || e.metaKey) {
e.preventDefault();
handleSplitAndKeepRightCallback();
}
break;
case "d":
if (e.ctrlKey || e.metaKey) {
e.preventDefault();
handleSeparateAudioCallback();
}
break;
}
},
[
isPlaying,
play,
pause,
handleSplitSelectedElement,
handleSplitAndKeepLeftCallback,
handleSplitAndKeepRightCallback,
handleSeparateAudioCallback,
]
);
useEffect(() => {
document.addEventListener("keydown", handleKeyPress);
return () => document.removeEventListener("keydown", handleKeyPress);
}, [handleKeyPress]);
};
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