Cartloader/src/main/java/moe/lava/cartloader/impl/MixinPlayerEntityImpl.kt

package moe.lava.cartloader.impl

import moe.lava.cartloader.accessor.AccessorAbstractMinecartEntity
import net.minecraft.entity.Entity
import net.minecraft.entity.ItemEntity
import net.minecraft.entity.player.PlayerEntity
import net.minecraft.entity.vehicle.AbstractMinecartEntity
import net.minecraft.item.Items
import net.minecraft.util.ActionResult
import net.minecraft.util.Hand

class MixinPlayerEntityImpl {
    private var linking: AbstractMinecartEntity? = null
    fun interact(minecart: Entity, player: PlayerEntity, hand: Hand): ActionResult? {
        if (minecart !is AbstractMinecartEntity)
            return null

        if (minecart !is AccessorAbstractMinecartEntity)
            return null;

        if (!player.getStackInHand(hand).isOf(Items.CHAIN))
            return null

        val target = linking
        if (target == null) {
            linking = minecart
            return ActionResult.SUCCESS
        }
        if (target !is AccessorAbstractMinecartEntity)
            return null

        linking = null
        if (!target.isAlive)
            return ActionResult.FAIL

        if (!minecart.boundingBox.expand(0.1).intersects(target.boundingBox))
            return ActionResult.FAIL

        target.`cartloader$getImpl`().linkTo(minecart)
        return ActionResult.SUCCESS
    }
}