From d44ba8a0aee3f93802905a3bbb1dada481349fdc Mon Sep 17 00:00:00 2001
From: alikia2x <alikia2x@outlook.com>
Date: Thu, 27 Mar 2025 02:13:33 +0800
Subject: [PATCH] fix: incorrect offset calculation in adjustSnapshotTime

---
 lib/db/snapshotSchedule.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/db/snapshotSchedule.ts b/lib/db/snapshotSchedule.ts
index 04bbe6e..8c825b7 100644
--- a/lib/db/snapshotSchedule.ts
+++ b/lib/db/snapshotSchedule.ts
@@ -202,9 +202,9 @@ export async function adjustSnapshotTime(
 	redisClient: Redis,
 ): Promise<Date> {
 	const currentWindow = getCurrentWindowIndex();
-	const targetOffset = Math.floor((expectedStartTime.getTime() - Date.now()) / (5 * MINUTE));
+	const targetOffset = Math.floor((expectedStartTime.getTime() - Date.now()) / (5 * MINUTE)) - 6;
 
-	let initialOffset = 0;
+	let initialOffset = currentWindow + Math.max(targetOffset, 0);
 
 	if (lastAvailableWindow && lastAvailableWindow.count < allowedCounts) {
 		initialOffset = Math.max(lastAvailableWindow.offset - 2, 0);
@@ -213,7 +213,7 @@ export async function adjustSnapshotTime(
 	let timePerIteration = 0;
 	const t = performance.now();
 	for (let i = initialOffset; i < WINDOW_SIZE; i++) {
-		const offset = (currentWindow + targetOffset + i) % WINDOW_SIZE;
+		const offset = i;
 		const count = await getWindowCount(redisClient, offset);
 
 		if (count < allowedCounts) {