core/core/api/src/commonMain/kotlin/dev/inmo/postssystem/core/post/repo/ReadPostsRepo.kt

package dev.inmo.postssystem.core.post.repo

import dev.inmo.postssystem.core.MAX_DATE
import dev.inmo.postssystem.core.MIN_DATE
import dev.inmo.postssystem.core.content.ContentId
import dev.inmo.postssystem.core.post.PostId
import dev.inmo.postssystem.core.post.RegisteredPost
import com.soywiz.klock.DateTime
import dev.inmo.micro_utils.pagination.*

/**
 * Simple read API by different properties
 */
interface ReadPostsRepo {
    /**
     * @return [Set] of [PostId]s which can be used to get data using [getPostById]
     */
    suspend fun getPostsIds(): Set<PostId>

    /**
     * @return [RegisteredPost] if it is available by [id]
     */
    suspend fun getPostById(id: PostId): RegisteredPost?

    /**
     * @return all [RegisteredPost]s which contains content with specified content [id]
     */
    suspend fun getPostsByContent(id: ContentId): List<RegisteredPost>

    /**
     * @return all [RegisteredPost]s which was registered between [from] and [to]. Range will be used INCLUSIVE, line \[[from], [to]\]
     */
    suspend fun getPostsByCreatingDates(
        from: DateTime = MIN_DATE,
        to: DateTime = MAX_DATE,
        pagination: Pagination = FirstPagePagination()
    ): PaginationResult<RegisteredPost>

    /**
     * @return all posts by pages basing on their creation date
     */
    suspend fun getPostsByPagination(pagination: Pagination): PaginationResult<RegisteredPost>
}

suspend fun ReadPostsRepo.getPostsByCreatingDates(
    from: DateTime? = null,
    to: DateTime? = null,
    pagination: Pagination = FirstPagePagination()
) = getPostsByCreatingDates(
    from ?: MIN_DATE,
    to ?: MAX_DATE,
    pagination
)