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path: root/src/main/kotlin/util/mc/SkullItemData.kt
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@file:UseSerializers(DashlessUUIDSerializer::class, InstantAsLongSerializer::class)

package moe.nea.firmament.util.mc

import com.google.common.collect.Multimap
import com.google.common.collect.Multimaps
import com.mojang.authlib.GameProfile
import com.mojang.authlib.minecraft.MinecraftProfileTexture
import com.mojang.authlib.properties.Property
import com.mojang.authlib.properties.PropertyMap
import java.time.Instant
import java.util.UUID
import kotlinx.serialization.Serializable
import kotlinx.serialization.UseSerializers
import net.minecraft.core.component.DataComponents
import net.minecraft.world.item.component.ResolvableProfile
import net.minecraft.world.item.ItemStack
import net.minecraft.world.item.Items
import moe.nea.firmament.Firmament
import moe.nea.firmament.util.Base64Util.padToValidBase64
import moe.nea.firmament.util.assertTrueOr
import moe.nea.firmament.util.json.DashlessUUIDSerializer
import moe.nea.firmament.util.json.InstantAsLongSerializer

@Serializable
data class MinecraftProfileTextureKt(
	val url: String,
	val metadata: Map<String, String> = mapOf(),
)

@Serializable
data class MinecraftTexturesPayloadKt(
	val textures: Map<MinecraftProfileTexture.Type, MinecraftProfileTextureKt> = mapOf(),
	val profileId: UUID? = null,
	val profileName: String? = null,
	val isPublic: Boolean = true,
	val timestamp: Instant = Instant.now(),
)

fun createSkullTextures(textures: MinecraftTexturesPayloadKt): PropertyMap {
	val json = Firmament.json.encodeToString(textures)
	val encoded = java.util.Base64.getEncoder().encodeToString(json.encodeToByteArray())
	return PropertyMap(
		Multimaps.forMap(mapOf(propertyTextures to Property(propertyTextures, encoded)))
	)
}

private val propertyTextures = "textures"

fun ItemStack.setEncodedSkullOwner(uuid: UUID, encodedData: String) {
	assert(this.item == Items.PLAYER_HEAD)
	val gameProfile = GameProfile(
		uuid, "LameGuy123",
		PropertyMap(
			Multimaps.forMap(
				mapOf(propertyTextures to Property(propertyTextures, encodedData.padToValidBase64()))
			)
		)
	)
	this.set(DataComponents.PROFILE, ResolvableProfile.createResolved(gameProfile))
}

val arbitraryUUID = UUID.fromString("d3cb85e2-3075-48a1-b213-a9bfb62360c1")
fun createSkullItem(uuid: UUID, url: String) = ItemStack(Items.PLAYER_HEAD)
	.also { it.setSkullOwner(uuid, url) }

fun ItemStack.setSkullOwner(uuid: UUID, url: String) {
	assert(this.item == Items.PLAYER_HEAD)
	val gameProfile = GameProfile(
		uuid, "nea89", createSkullTextures(
			MinecraftTexturesPayloadKt(
				textures = mapOf(MinecraftProfileTexture.Type.SKIN to MinecraftProfileTextureKt(url)),
				profileId = uuid,
				profileName = "nea89",
			)
		)
	)
	this.set(DataComponents.PROFILE, ResolvableProfile.createResolved(gameProfile))
}


fun decodeProfileTextureProperty(property: Property): MinecraftTexturesPayloadKt? {
	assertTrueOr(property.name == propertyTextures) { return null }
	return try {
		var encodedF: String = property.value
		while (encodedF.length % 4 != 0 && encodedF.last() == '=') {
			encodedF = encodedF.substring(0, encodedF.length - 1)
		}
		val json = java.util.Base64.getDecoder().decode(encodedF).decodeToString()
		Firmament.json.decodeFromString<MinecraftTexturesPayloadKt>(json)
	} catch (e: Exception) {
		// Malformed profile data
		if (Firmament.DEBUG)
			e.printStackTrace()
		null
	}
}