/**
 * Copyright (c) 2023 Vitor Pamplona
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
 * Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package com.vitorpamplona.amethyst.ui.dal

import com.vitorpamplona.amethyst.model.Account
import com.vitorpamplona.amethyst.model.AddressableNote
import com.vitorpamplona.amethyst.model.LocalCache
import com.vitorpamplona.amethyst.model.Note
import com.vitorpamplona.quartz.events.CommunityPostApprovalEvent

class CommunityFeedFilter(val note: AddressableNote, val account: Account) :
    AdditiveFeedFilter<Note>() {
    override fun feedKey(): String {
        return account.userProfile().pubkeyHex + "-" + note.idHex
    }

    override fun feed(): List<Note> {
        return sort(innerApplyFilter(LocalCache.notes.values))
    }

    override fun applyFilter(collection: Set<Note>): Set<Note> {
        return innerApplyFilter(collection)
    }

    private fun innerApplyFilter(collection: Collection<Note>): Set<Note> {
        val myUnapprovedPosts =
            collection
                .asSequence()
                .filter { it.event is CommunityPostApprovalEvent } // Only Approvals
                .filter {
                    it.author?.pubkeyHex == account.userProfile().pubkeyHex
                } // made by the logged in user
                .filter { it.event?.isTaggedAddressableNote(note.idHex) == true } // for this community
                .filter { it.isNewThread() } // check if it is a new thread
                .toSet()

        val approvedPosts =
            collection
                .asSequence()
                .filter { it.event is CommunityPostApprovalEvent } // Only Approvals
                .filter { it.event?.isTaggedAddressableNote(note.idHex) == true } // Of the given community
                .mapNotNull { it.replyTo }
                .flatten() // get approved posts
                .filter { it.isNewThread() } // check if it is a new thread
                .toSet()

        return myUnapprovedPosts + approvedPosts
    }

    override fun sort(collection: Set<Note>): List<Note> {
        return collection.sortedWith(compareBy({ it.createdAt() }, { it.idHex })).reversed()
    }
}
