src/main/scala/li/cil/oc/integration/fmp/PrintPart.scala

package li.cil.oc.integration.fmp

import java.lang

import codechicken.lib.data.MCDataInput
import codechicken.lib.data.MCDataOutput
import codechicken.lib.raytracer.ExtendedMOP
import codechicken.lib.vec.Cuboid6
import codechicken.lib.vec.Vector3
import codechicken.multipart.IRedstonePart
import codechicken.multipart.PartMap
import codechicken.multipart.TCuboidPart
import codechicken.multipart.TEdgePart
import codechicken.multipart.TFacePart
import codechicken.multipart.TMultiPart
import codechicken.multipart.TNormalOcclusion
import codechicken.multipart.TSlottedPart
import codechicken.multipart.scalatraits.TSlottedTile
import cpw.mods.fml.relauncher.Side
import cpw.mods.fml.relauncher.SideOnly
import li.cil.oc.Constants
import li.cil.oc.Settings
import li.cil.oc.api.Items
import li.cil.oc.client.renderer.block.Print
import li.cil.oc.common.block.Print
import li.cil.oc.common.item.data.PrintData
import li.cil.oc.common.tileentity
import li.cil.oc.integration.util.BundledRedstone
import li.cil.oc.util.BlockPosition
import li.cil.oc.util.ExtendedAABB
import li.cil.oc.util.ExtendedAABB._
import li.cil.oc.util.ExtendedNBT._
import net.minecraft.client.renderer.OpenGlHelper
import net.minecraft.client.renderer.RenderBlocks
import net.minecraft.client.renderer.RenderGlobal
import net.minecraft.entity.player.EntityPlayer
import net.minecraft.item.ItemStack
import net.minecraft.nbt.NBTTagCompound
import net.minecraft.util.MovingObjectPosition
import net.minecraft.util.Vec3
import net.minecraftforge.common.util.ForgeDirection
import org.lwjgl.opengl.GL11

import scala.collection.convert.WrapAsJava._
import scala.collection.convert.WrapAsScala._

object PrintPart {
  private val q0 = 0 / 16f
  private val q1 = 4 / 16f
  private val q2 = 12 / 16f
  private val q3 = 16 / 16f

  val slotBounds = Array(
    new Cuboid6(q1, q0, q1, q2, q1, q2),
    new Cuboid6(q1, q2, q1, q2, q3, q2),
    new Cuboid6(q1, q1, q0, q2, q2, q1),
    new Cuboid6(q1, q1, q2, q2, q2, q3),
    new Cuboid6(q0, q1, q1, q1, q2, q2),
    new Cuboid6(q2, q1, q1, q3, q2, q2),
    new Cuboid6(q1, q1, q1, q2, q2, q2),

    new Cuboid6(q0, q0, q0, q1, q1, q1),
    new Cuboid6(q0, q2, q0, q1, q3, q1),
    new Cuboid6(q0, q0, q2, q1, q1, q3),
    new Cuboid6(q0, q2, q2, q1, q3, q3),
    new Cuboid6(q2, q0, q0, q3, q1, q1),
    new Cuboid6(q2, q2, q0, q3, q3, q1),
    new Cuboid6(q2, q0, q2, q3, q1, q3),
    new Cuboid6(q2, q2, q2, q3, q3, q3),

    new Cuboid6(q0, q1, q0, q1, q2, q1),
    new Cuboid6(q0, q1, q2, q1, q2, q3),
    new Cuboid6(q2, q1, q0, q3, q2, q1),
    new Cuboid6(q2, q1, q2, q3, q2, q3),
    new Cuboid6(q0, q0, q1, q1, q1, q2),
    new Cuboid6(q2, q0, q1, q3, q1, q2),
    new Cuboid6(q0, q2, q1, q1, q3, q2),
    new Cuboid6(q2, q2, q1, q3, q3, q2),
    new Cuboid6(q1, q0, q0, q2, q1, q1),
    new Cuboid6(q1, q2, q0, q2, q3, q1),
    new Cuboid6(q1, q0, q2, q2, q1, q3),
    new Cuboid6(q1, q2, q2, q2, q3, q3)
  )
}

class PrintPart(val original: Option[tileentity.Print] = None) extends SimpleBlockPart with TCuboidPart with TNormalOcclusion with IRedstonePart with TSlottedPart with TEdgePart with TFacePart {
  var facing = ForgeDirection.SOUTH
  var data = new PrintData()

  var boundsOff = ExtendedAABB.unitBounds
  var boundsOn = ExtendedAABB.unitBounds
  var state = false
  var toggling = false // avoid infinite loops when updating neighbors

  original.foreach(print => {
    facing = print.facing
    data = print.data
    boundsOff = print.boundsOff
    boundsOn = print.boundsOn
    state = print.state
  })

  // ----------------------------------------------------------------------- //

  override def simpleBlock = Items.get(Constants.BlockName.Print).block().asInstanceOf[Print]

  def getType = Settings.namespace + Constants.BlockName.Print

  override def doesTick = false

  override def getLightValue: Int = data.lightLevel

  override def getBounds = new Cuboid6(if (state) boundsOn else boundsOff)

  override def getOcclusionBoxes = {
    val shapes = if (state) data.stateOn else data.stateOff
    asJavaIterable(shapes.map(shape => new Cuboid6(shape.bounds.rotateTowards(facing))))
  }

  override def getCollisionBoxes = getOcclusionBoxes

  override def getRenderBounds = getBounds

  override def getSlotMask: Int = {
    var mask = 0
    val boxes = getOcclusionBoxes
    for (slot <- PartMap.values) {
      val bounds = PrintPart.slotBounds(slot.i)
      if (boxes.exists(_.intersects(bounds))) {
        mask |= slot.mask
      }
    }
    mask
  }

  // ----------------------------------------------------------------------- //

  override def conductsRedstone: Boolean = if (state) data.emitRedstoneWhenOn else data.emitRedstoneWhenOff

  override def redstoneConductionMap: Int = if (conductsRedstone) 0xFF else 0

  override def canConnectRedstone(side: Int): Boolean = true

  override def strongPowerLevel(side: Int): Int = weakPowerLevel(side)

  override def weakPowerLevel(side: Int): Int = if (data.emitRedstone(state)) data.redstoneLevel else 0

  // ----------------------------------------------------------------------- //

  override def activate(player: EntityPlayer, hit: MovingObjectPosition, item: ItemStack): Boolean = {
    if (data.hasActiveState) {
      if (!state || !data.isButtonMode) {
        toggleState()
        return true
      }
    }
    false
  }

  def toggleState(): Unit = {
    if (canToggle) {
      toggling = true
      state = !state
      // Update slot info in tile... kinda meh, but works.
      tile match {
        case slotted: TSlottedTile =>
          for (i <- 0 until slotted.v_partMap.length) {
            if (slotted.v_partMap(i) == this)
              slotted.v_partMap(i) = null
          }
          tile.bindPart(this)
        case _ =>
      }
      world.playSoundEffect(x + 0.5, y + 0.5, z + 0.5, "random.click", 0.3F, if (state) 0.6F else 0.5F)
      tile.notifyPartChange(this)
      sendDescUpdate()
      if (state && data.isButtonMode) {
        scheduleTick(simpleBlock.tickRate(world))
      }
      toggling = false
    }
  }

  def canToggle = !toggling && world != null && !world.isRemote && {
    val toggled = new PrintPart()
    toggled.facing = facing
    toggled.data = data
    toggled.state = !state
    toggled.boundsOff = boundsOff
    toggled.boundsOn = boundsOn
    tile.canReplacePart(this, toggled)
  }

  // ----------------------------------------------------------------------- //

  override def scheduledTick(): Unit = if (state) toggleState()

  override def pickItem(hit: MovingObjectPosition): ItemStack = data.createItemStack()

  override def getDrops: lang.Iterable[ItemStack] = asJavaIterable(Iterable(data.createItemStack()))

  override def collisionRayTrace(start: Vec3, end: Vec3): ExtendedMOP = {
    val shapes = if (state) data.stateOn else data.stateOff
    var closestDistance = Double.PositiveInfinity
    var closest: Option[MovingObjectPosition] = None
    for (shape <- shapes) {
      val bounds = shape.bounds.rotateTowards(facing).offset(x, y, z)
      val hit = bounds.calculateIntercept(start, end)
      if (hit != null) {
        val distance = hit.hitVec.distanceTo(start)
        if (distance < closestDistance) {
          closestDistance = distance
          hit.blockX = x
          hit.blockY = y
          hit.blockZ = z
          closest = Option(hit)
        }
      }
    }
    closest.fold(if (shapes.isEmpty) new ExtendedMOP(x, y, z, 0, Vec3.createVectorHelper(0.5, 0.5, 0.5), null) else null)(hit => new ExtendedMOP(hit, null, closestDistance))
  }

  @SideOnly(Side.CLIENT)
  override def drawHighlight(hit: MovingObjectPosition, player: EntityPlayer, frame: Float): Boolean = {
    val pos = player.getPosition(frame)
    val expansion = 0.002f

    // See RenderGlobal.drawSelectionBox.
    GL11.glEnable(GL11.GL_BLEND)
    OpenGlHelper.glBlendFunc(770, 771, 1, 0)
    GL11.glColor4f(0, 0, 0, 0.4f)
    GL11.glLineWidth(2)
    GL11.glDisable(GL11.GL_TEXTURE_2D)
    GL11.glDepthMask(false)

    for (shape <- if (state) data.stateOn else data.stateOff) {
      val bounds = shape.bounds.rotateTowards(facing)
      RenderGlobal.drawOutlinedBoundingBox(bounds.copy().expand(expansion, expansion, expansion)
        .offset(hit.blockX, hit.blockY, hit.blockZ)
        .offset(-pos.xCoord, -pos.yCoord, -pos.zCoord), -1)
    }

    GL11.glDepthMask(true)
    GL11.glEnable(GL11.GL_TEXTURE_2D)
    GL11.glDisable(GL11.GL_BLEND)

    true
  }

  override def onPartChanged(part: TMultiPart): Unit = {
    super.onPartChanged(part)
    checkRedstone()
  }

  override def onNeighborChanged(): Unit = {
    super.onNeighborChanged()
    checkRedstone()
  }

  protected def checkRedstone(): Unit = {
    val newMaxValue = computeInput()
    val newState = newMaxValue > 1 // >1 Fixes oddities in cycling updates.
    if (!data.emitRedstone && data.hasActiveState && state != newState) {
      toggleState()
    }
  }

  protected def computeInput(): Int = {
    val inner = tile.partList.foldLeft(0)((power, part) => part match {
      case print: PrintPart if print.data.emitRedstone(print.state) => math.max(power, print.data.redstoneLevel)
      case _ => power
    })
    math.max(inner, ForgeDirection.VALID_DIRECTIONS.map(BundledRedstone.computeInput(BlockPosition(x, y, z), _)).max)
  }

  // ----------------------------------------------------------------------- //

  override def load(nbt: NBTTagCompound) {
    super.load(nbt)
    facing = nbt.getDirection("facing").getOrElse(facing)
    data.load(nbt.getCompoundTag("data"))
    state = nbt.getBoolean("state")
    updateBounds()
  }

  override def save(nbt: NBTTagCompound) {
    super.save(nbt)
    nbt.setDirection("facing", Option(facing))
    nbt.setNewCompoundTag("data", data.save)
    nbt.setBoolean("state", state)
  }

  override def readDesc(packet: MCDataInput) {
    super.readDesc(packet)
    facing = ForgeDirection.getOrientation(packet.readUByte())
    data.load(packet.readNBTTagCompound())
    state = packet.readBoolean()
    updateBounds()
    if (world != null) {
      world.markBlockForUpdate(x, y, z)
    }
  }

  override def writeDesc(packet: MCDataOutput) {
    super.writeDesc(packet)
    packet.writeByte(facing.ordinal().toByte)
    val nbt = new NBTTagCompound()
    data.save(nbt)
    packet.writeNBTTagCompound(nbt)
    packet.writeBoolean(state)
  }

  def updateBounds(): Unit = {
    boundsOff = data.stateOff.drop(1).foldLeft(data.stateOff.headOption.fold(ExtendedAABB.unitBounds)(_.bounds))((a, b) => a.func_111270_a(b.bounds))
    if (boundsOff.volume == 0) boundsOff = ExtendedAABB.unitBounds
    else boundsOff = boundsOff.rotateTowards(facing)
    boundsOn = data.stateOn.drop(1).foldLeft(data.stateOn.headOption.fold(ExtendedAABB.unitBounds)(_.bounds))((a, b) => a.func_111270_a(b.bounds))
    if (boundsOn.volume == 0) boundsOn = ExtendedAABB.unitBounds
    else boundsOn = boundsOn.rotateTowards(facing)
  }

  // ----------------------------------------------------------------------- //

  @SideOnly(Side.CLIENT)
  override def renderStatic(pos: Vector3, pass: Int) = {
    val (x, y, z) = (pos.x.toInt, pos.y.toInt, pos.z.toInt)
    val renderer = RenderBlocks.getInstance
    renderer.blockAccess = world
    Print.render(data, state, facing, x, y, z, simpleBlock, renderer)
    true
  }

}