/*
 * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 */

package moe.nea.firmament.repo

import io.github.cottonmc.cotton.gui.client.CottonHud
import io.github.moulberry.repo.NEURecipeCache
import io.github.moulberry.repo.NEURepository
import io.github.moulberry.repo.NEURepositoryException
import io.github.moulberry.repo.data.NEUItem
import io.github.moulberry.repo.data.NEURecipe
import io.github.moulberry.repo.data.Rarity
import kotlinx.coroutines.launch
import moe.nea.firmament.Firmament
import moe.nea.firmament.Firmament.logger
import moe.nea.firmament.gui.config.ManagedConfig
import moe.nea.firmament.hud.ProgressBar
import moe.nea.firmament.rei.PetData
import moe.nea.firmament.util.MinecraftDispatcher
import moe.nea.firmament.util.SkyblockId
import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientTickEvents
import net.minecraft.client.MinecraftClient
import net.minecraft.network.packet.s2c.play.SynchronizeRecipesS2CPacket
import net.minecraft.text.Text

object RepoManager {
    object Config : ManagedConfig("repo") {
        var username by string("username") { "NotEnoughUpdates" }
        var reponame by string("reponame") { "NotEnoughUpdates-REPO" }
        var branch by string("branch") { "prerelease" }
        val autoUpdate by toggle("autoUpdate") { true }
        val reset by button("reset") {
            username = "NotEnoughUpdates"
            reponame = "NotEnoughUpdates-REPO"
            branch = "prerelease"
            save()
        }

        val disableItemGroups by toggle("disable-item-groups") { false }
        val reload by button("reload") {
            save()
            RepoManager.reload()
        }
        val redownload by button("redownload") {
            save()
            RepoManager.launchAsyncUpdate(true)
        }
    }

    val currentDownloadedSha by RepoDownloadManager::latestSavedVersionHash

    var recentlyFailedToUpdateItemList = false

    val progressBar = ProgressBar("", null, 0).also {
        it.setSize(180, 22)
    }

    val neuRepo: NEURepository = NEURepository.of(RepoDownloadManager.repoSavedLocation).apply {
        registerReloadListener(ItemCache)
        registerReloadListener(ExpLadders)
        registerReloadListener {
            Firmament.coroutineScope.launch(MinecraftDispatcher) {
                if (!trySendClientboundUpdateRecipesPacket()) {
                    logger.warn("Failed to issue a ClientboundUpdateRecipesPacket (to reload REI). This may lead to an outdated item list.")
                    recentlyFailedToUpdateItemList = true
                }
            }
        }
    }

    private val recipeCache = NEURecipeCache.forRepo(neuRepo)

    fun getAllRecipes() = neuRepo.items.items.values.asSequence().flatMap { it.recipes }

    fun getRecipesFor(skyblockId: SkyblockId): Set<NEURecipe> = recipeCache.recipes[skyblockId.neuItem] ?: setOf()
    fun getUsagesFor(skyblockId: SkyblockId): Set<NEURecipe> = recipeCache.usages[skyblockId.neuItem] ?: setOf()

    private fun trySendClientboundUpdateRecipesPacket(): Boolean {
        return MinecraftClient.getInstance().world != null && MinecraftClient.getInstance().networkHandler?.onSynchronizeRecipes(
            SynchronizeRecipesS2CPacket(mutableListOf())
        ) != null
    }

    init {
        ClientTickEvents.START_WORLD_TICK.register(ClientTickEvents.StartWorldTick {
            if (recentlyFailedToUpdateItemList && trySendClientboundUpdateRecipesPacket())
                recentlyFailedToUpdateItemList = false
        })
    }

    fun getNEUItem(skyblockId: SkyblockId): NEUItem? = neuRepo.items.getItemBySkyblockId(skyblockId.neuItem)

    fun launchAsyncUpdate(force: Boolean = false) {
        Firmament.coroutineScope.launch {
            progressBar.reportProgress("Downloading", 0, null)
            CottonHud.add(progressBar)
            RepoDownloadManager.downloadUpdate(force)
            progressBar.reportProgress("Download complete", 1, 1)
            reload()
        }
    }

    fun reload() {
        try {
            progressBar.reportProgress("Reloading from Disk", 0, null)
            CottonHud.add(progressBar)
            neuRepo.reload()
        } catch (exc: NEURepositoryException) {
            MinecraftClient.getInstance().player?.sendMessage(
                Text.literal("Failed to reload repository. This will result in some mod features not working.")
            )
            CottonHud.remove(progressBar)
            exc.printStackTrace()
        }
    }

    fun initialize() {
        if (Config.autoUpdate) {
            launchAsyncUpdate()
        } else {
            reload()
        }
    }

    fun getPotentialStubPetData(skyblockId: SkyblockId): PetData? {
        val parts = skyblockId.neuItem.split(";")
        if (parts.size != 2) {
            return null
        }
        val (petId, rarityIndex) = parts
        if (!rarityIndex.all { it.isDigit() }) {
            return null
        }
        val intIndex = rarityIndex.toInt()
        if (intIndex !in rarityIndex.indices) return null
        if (petId !in neuRepo.constants.petNumbers) return null
        return PetData(Rarity.values()[intIndex], petId, 0.0)
    }

}