package net.shadowfacts.phycon.item

import net.minecraft.block.BlockState
import net.minecraft.item.ItemPlacementContext
import net.minecraft.util.math.BlockPos
import net.minecraft.util.math.Direction
import net.shadowfacts.phycon.block.FaceDeviceBlock
import net.shadowfacts.phycon.block.cable.CableBlock
import net.shadowfacts.phycon.init.PhyBlocks
import net.shadowfacts.phycon.util.CableConnection
import kotlin.math.floor
import kotlin.math.roundToInt

/**
 * @author shadowfacts
 */
class FaceDeviceBlockItem(block: FaceDeviceBlock<*>, settings: Settings = Settings()): DeviceBlockItem(block, settings) {

	override fun getPlacementState(context: ItemPlacementContext): BlockState? {
		val hitState = context.world.getBlockState(context.blockPos)
		val hitBlock = hitState.block
		if (hitBlock is CableBlock) {
			val hitBlockEdge = context.hitPos.getComponentAlongAxis(context.side.axis) % 1 == 0.0
			val hitBlockBeingPlacedIn = floor(context.hitPos.getComponentAlongAxis(context.side.axis)).toInt() == context.blockPos.getComponentAlongAxis(context.side.axis)

			val placementSide: Direction =
					if (hitBlockEdge xor hitBlockBeingPlacedIn) {
						context.side
					} else {
						context.side.opposite
					}

			if (hitState[CableBlock.CONNECTIONS[placementSide]] != CableConnection.ON) {
				var connection = FaceDeviceBlock.FaceCableConnection.NONE
				for (dir in Direction.values()) {
					if (hitState[CableBlock.CONNECTIONS[dir]] == CableConnection.ON) {
						connection = FaceDeviceBlock.FaceCableConnection.from(dir)
						break
					}
				}

				return block.defaultState
					.with(FaceDeviceBlock.FACING, placementSide)
					.with(FaceDeviceBlock.CABLE_CONNECTION, connection)
					.with(FaceDeviceBlock.COLOR, hitBlock.color)
			}
		}
		return null
	}

}