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import { useEffect, useRef } from 'react';
import { listen } from '@tauri-apps/api/event';
import { useTimerStore, TimerTickPayload } from '../store/timerStore';
import { useTaskStore } from '../store/taskStore';
interface PhaseChangedPayload {
phase: TimerTickPayload['phase'];
session_count: number;
}
interface CompletedPayload {
task_id: string | null;
}
export function useTimerEvents(
onCompleted: (taskId: string | null) => void,
) {
const syncFromBackend = useTimerStore((s) => s.syncFromBackend);
const setRunning = useTimerStore((s) => s.setRunning);
const fetchTasks = useTaskStore((s) => s.fetchTasks);
const onCompletedRef = useRef(onCompleted);
useEffect(() => {
onCompletedRef.current = onCompleted;
}, [onCompleted]);
useEffect(() => {
let cancelled = false;
let unlisteners: Array<() => void> = [];
async function setup() {
// Register all listeners atomically
try {
const [unlistenTick, unlistenCompleted, unlistenPhaseChanged] = await Promise.all([
listen<TimerTickPayload>('timer-tick', (event) => {
useTimerStore.setState({
phase: event.payload.phase,
remainingSecs: event.payload.remaining_secs,
totalSecs: event.payload.total_secs,
running: true,
sessionCount: event.payload.session_count,
currentTaskId: event.payload.current_task_id,
});
}),
listen<CompletedPayload>('timer-completed', async (event) => {
setRunning(false);
onCompletedRef.current(event.payload.task_id ?? null);
await fetchTasks();
await syncFromBackend();
}),
listen<PhaseChangedPayload>('timer-phase-changed', async (_event) => {
try {
await syncFromBackend();
} catch (e) {
console.error('Failed to re-sync timer status:', e);
}
}),
]);
if (cancelled) {
unlistenTick();
unlistenCompleted();
unlistenPhaseChanged();
return;
}
unlisteners = [unlistenTick, unlistenCompleted, unlistenPhaseChanged];
try {
await syncFromBackend();
} catch (e) {
console.error('Failed to get timer status:', e);
}
} catch (e) {
console.error('Failed to register timer listeners:', e);
}
}
setup();
return () => {
cancelled = true;
unlisteners.forEach((fn) => fn());
};
}, [syncFromBackend, setRunning, fetchTasks]); // onCompleted excluded — updated via ref
}
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