export function getClosestHourTimestamp(): string {
    const now = new Date();
    now.setMinutes(0, 0, 0); // 设置分钟、秒和毫秒为0

    // 获取本地时间的年份、月份、日期、小时
    const year = now.getFullYear();
    const month = String(now.getMonth() + 1).padStart(2, '0'); // 月份从0开始
    const day = String(now.getDate()).padStart(2, '0');
    const hour = String(now.getHours()).padStart(2, '0');

    // 拼接成所需的格式
    const localHourTimestamp = `${year}-${month}-${day}T${hour}:00`;

    return localHourTimestamp;
}

export function findClosestDateIndex(dates: string[], utc_offset_seconds: number): number {
    const now = new Date();
    const nowTimestamp = now.getTime();
    const offsetMilliseconds = utc_offset_seconds * 1000;

    let closestIndex = -1;
    let closestDiff = Infinity;

    for (let i = 0; i < dates.length; i++) {
        const date = new Date(dates[i]);
        const adjustedTimestamp = date.getTime();

        if (adjustedTimestamp <= nowTimestamp) {
            const diff = nowTimestamp - adjustedTimestamp;
            if (diff < closestDiff) {
                closestDiff = diff;
                closestIndex = i;
            }
        }
    }

    return closestIndex;
}