package kr.co.vividnext.sodalive.extensions

import java.time.Duration
import java.time.LocalDateTime
import java.time.ZoneId

private val DEFAULT_KST_ZONE_ID: ZoneId = ZoneId.of("Asia/Seoul")
private val UTC_ZONE_ID: ZoneId = ZoneId.of("UTC")

fun LocalDateTime.getTimeAgoString(): String {
    val now = LocalDateTime.now()
    val duration = Duration.between(this, now)

    return when {
        duration.toMinutes() < 1 -> "방금 전"
        duration.toMinutes() < 60 -> "${duration.toMinutes()}분전"
        duration.toHours() < 24 -> "${duration.toHours()}시간전"
        duration.toDays() < 30 -> "${duration.toDays()}일전"
        duration.toDays() < 365 -> "${duration.toDays() / 30}개월전"
        else -> "${duration.toDays() / 365}년전"
    }
}

fun LocalDateTime.convertToUtc(timeZone: ZoneId = DEFAULT_KST_ZONE_ID): LocalDateTime {
    return atZone(timeZone)
        .withZoneSameInstant(UTC_ZONE_ID)
        .toLocalDateTime()
}