package dev.inmo.micro_utils.pagination

import org.jetbrains.exposed.sql.*

fun Query.paginate(with: Pagination, orderBy: Pair<Expression<*>, SortOrder>? = null) = limit(
    with.size,
    (if (orderBy ?.second == SortOrder.DESC) {
        with.lastIndex
    } else {
        with.firstIndex
    }).toLong()
).let {
    if (orderBy != null) {
        it.orderBy(
            orderBy.first,
            orderBy.second
        )
    } else {
        it
    }
}

fun Query.paginate(with: Pagination, orderBy: Expression<*>?, reversed: Boolean = false) = paginate(
    with,
    orderBy ?.let { it to if (reversed) SortOrder.DESC else SortOrder.ASC }
)