/*
 * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
 * Copyright (C) 2023 Linnea Gräf
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package moe.nea.firmament.repo

import com.mojang.serialization.Dynamic
import io.github.cottonmc.cotton.gui.client.CottonHud
import io.github.moulberry.repo.IReloadable
import io.github.moulberry.repo.NEURepository
import io.github.moulberry.repo.data.NEUItem
import java.util.concurrent.ConcurrentHashMap
import org.apache.logging.log4j.LogManager
import kotlinx.coroutines.Job
import kotlinx.coroutines.launch
import net.minecraft.SharedConstants
import net.minecraft.client.resource.language.I18n
import net.minecraft.datafixer.Schemas
import net.minecraft.datafixer.TypeReferences
import net.minecraft.item.ItemStack
import net.minecraft.item.Items
import net.minecraft.nbt.NbtCompound
import net.minecraft.nbt.NbtOps
import net.minecraft.text.Text
import moe.nea.firmament.Firmament
import moe.nea.firmament.rei.SBItemStack
import moe.nea.firmament.util.LegacyTagParser
import moe.nea.firmament.util.SkyblockId
import moe.nea.firmament.util.appendLore
import moe.nea.firmament.util.skyblockId

object ItemCache : IReloadable {
    private val cache: MutableMap<String, ItemStack> = ConcurrentHashMap()
    private val df = Schemas.getFixer()
    val logger = LogManager.getLogger("${Firmament.logger.name}.ItemCache")
    var isFlawless = true
        private set

    private fun NEUItem.get10809CompoundTag(): NbtCompound = NbtCompound().apply {
        put("tag", LegacyTagParser.parse(nbttag))
        putString("id", minecraftItemId)
        putByte("Count", 1)
        putShort("Damage", damage.toShort())
    }

    private fun NbtCompound.transformFrom10809ToModern(): NbtCompound? =
        try {
            df.update(
                TypeReferences.ITEM_STACK,
                Dynamic(NbtOps.INSTANCE, this),
                -1,
                SharedConstants.getGameVersion().saveVersion.id
            ).value as NbtCompound
        } catch (e: Exception) {
            isFlawless = false
            logger.error("Could not data fix up $this", e)
            null
        }

    fun brokenItemStack(neuItem: NEUItem?, idHint: SkyblockId? = null): ItemStack {
        return ItemStack(Items.PAINTING).apply {
            setCustomName(Text.literal(neuItem?.displayName ?: idHint?.toString() ?: "null"))
            appendLore(listOf(Text.translatable("firmament.repo.brokenitem", neuItem?.skyblockItemId ?: idHint)))
        }
    }

    private fun NEUItem.asItemStackNow(): ItemStack {
        try {
            val oldItemTag = get10809CompoundTag()
            val modernItemTag = oldItemTag.transformFrom10809ToModern()
                ?: return brokenItemStack(this)
            val itemInstance = ItemStack.fromNbt(modernItemTag)
            if (itemInstance.nbt?.contains("Enchantments") == true) {
                itemInstance.enchantments.add(NbtCompound())
            }
            return itemInstance
        } catch (e: Exception) {
            e.printStackTrace()
            return brokenItemStack(this)
        }
    }

    fun SBItemStack.asItemStack(): ItemStack {
        return this.neuItem.asItemStack(idHint = this.skyblockId)
            .let { if (this.stackSize != 1) it.copyWithCount(this.stackSize) else it }
    }

    fun NEUItem?.asItemStack(idHint: SkyblockId? = null): ItemStack {
        if (this == null) return brokenItemStack(null, idHint)
        var s = cache[this.skyblockItemId]
        if (s == null) {
            s = asItemStackNow()
            cache[this.skyblockItemId] = s
        }
        return s
    }

    fun NEUItem.getIdentifier() = skyblockId.identifier


    var job: Job? = null

    override fun reload(repository: NEURepository) {
        val j = job
        if (j != null && j.isActive) {
            j.cancel()
        }
        cache.clear()
        isFlawless = true

        job = Firmament.coroutineScope.launch {
            val items = repository.items?.items
            if (items == null) {
                CottonHud.remove(RepoManager.progressBar)
                return@launch
            }
            val recacheItems = I18n.translate("firmament.repo.cache")
            RepoManager.progressBar.reportProgress(recacheItems, 0, items.size)
            CottonHud.add(RepoManager.progressBar)
            var i = 0
            items.values.forEach {
                it.asItemStack() // Rebuild cache
                RepoManager.progressBar.reportProgress(recacheItems, i++, items.size)
            }
            CottonHud.remove(RepoManager.progressBar)
        }
    }
}