package net.deliciousreya.minecraftportal.model

import com.google.common.collect.ImmutableList
import com.google.common.collect.ImmutableMap
import com.google.common.collect.ImmutableSet
import org.bukkit.Location
import org.bukkit.block.Block
import org.bukkit.util.Vector
import net.deliciousreya.minecraftportal.extensions.*
import net.deliciousreya.minecraftportal.proto.PortalSaveDataProtos
import org.bukkit.Material
import org.bukkit.Material.*
import org.bukkit.Particle
import org.bukkit.Sound
import org.bukkit.block.BlockFace
import org.bukkit.block.data.Directional
import org.bukkit.block.data.Openable
import org.bukkit.entity.Entity
import org.bukkit.scheduler.BukkitRunnable
import org.bukkit.util.BoundingBox

val MINERAL_TYPES: ImmutableMap<Material, Material> = ImmutableMap.Builder<Material, Material>()
    .put(COAL_BLOCK, BLACK_STAINED_GLASS)
    .put(REDSTONE_BLOCK, RED_STAINED_GLASS)
    .put(LAPIS_BLOCK, BLUE_STAINED_GLASS)
    .put(GOLD_BLOCK, YELLOW_STAINED_GLASS)
    .put(DIAMOND_BLOCK, CYAN_STAINED_GLASS)
    .put(EMERALD_BLOCK, GREEN_STAINED_GLASS)
    .put(IRON_BLOCK, GRAY_STAINED_GLASS)
    .put(QUARTZ_BLOCK, WHITE_STAINED_GLASS)
    .put(TERRACOTTA, ORANGE_STAINED_GLASS)
    .put(SMOOTH_RED_SANDSTONE, PINK_STAINED_GLASS)
    .put(END_STONE_BRICKS, LIME_STAINED_GLASS)
    .put(PRISMARINE, LIGHT_BLUE_STAINED_GLASS)
    .put(BRICKS, MAGENTA_STAINED_GLASS)
    .put(PURPUR_BLOCK, PURPLE_STAINED_GLASS)
    .put(POLISHED_GRANITE, BROWN_STAINED_GLASS)
    .put(POLISHED_ANDESITE, LIGHT_GRAY_STAINED_GLASS)
    .build()

val DOOR_TYPES: ImmutableSet<Material> = ImmutableSet.of(ACACIA_DOOR, BIRCH_DOOR, DARK_OAK_DOOR, IRON_DOOR, JUNGLE_DOOR, OAK_DOOR, SPRUCE_DOOR)

fun findPortalFrameConnectedTo(block:Block, state: PortalFrame.State): PortalFrame? {
    for (blockSet in state.blockSets) {
        for (direction in PortalFrame.ExitDirection.values()) {
            for (offset in blockSet.offsets(direction)) {
                val scanResult = checkPortalFrameAt(
                    block.location.subtract(offset),
                    direction,
                    state
                )
                if (scanResult != null) {
                    return scanResult
                }
            }
        }
    }
    return null
}

/** Detects whether there is a portal frame in the given state at the given location, extending in the given direction. */
fun checkPortalFrameAt(location:Location, direction: PortalFrame.ExitDirection, state: PortalFrame.State): PortalFrame? {
    val mineral = (location + direction.mineralOffset).block
    if (mineral.type !in state.mineralBlocks) {
        return null
    }
    val color = (location + direction.colorOffset).block
    if (color.type !in state.colorBlocks) {
        return null
    }
    for (vector in direction.glassOffsets) {
        val block = (location + vector).block
        if (block.type !in state.glassBlocks) {
            return null
        }
    }
    for (vector in direction.doorOffsets) {
        val block = (location + vector).block
        val door = block.blockData
        if (block.type !in state.doorBlocks || (door is Directional && door.facing != direction.doorDirection)) {
            return null
        }
    }
    return PortalFrame(location, direction)
}

fun PortalSaveDataProtos.Portal.Direction.toDirection(): PortalFrame.ExitDirection {
    for (direction in PortalFrame.ExitDirection.values()) {
        if (direction.protoEnum == this) {
            return direction
        }
    }
    throw IllegalStateException("Bad enum value: $this")
}

/** Information about a portal frame. */
data class PortalFrame(val lowerLeftFrontCorner: Location, val direction: ExitDirection) {
    enum class State(val glassBlocks: ImmutableSet<Material>, val colorBlocks: ImmutableSet<Material>, val doorBlocks: ImmutableSet<Material>, val mineralBlocks: ImmutableSet<Material>) {
        ACTIVE(ImmutableSet.copyOf(MINERAL_TYPES.values), ImmutableSet.copyOf(COLOR_MAPPING.keys),
            DOOR_TYPES, ImmutableSet.copyOf(MINERAL_TYPES.keys)),
        INACTIVE(ImmutableSet.of(GLASS), ImmutableSet.builder<Material>().addAll(COLOR_MAPPING.keys).add(GLASS).build(),
            DOOR_TYPES, ImmutableSet.copyOf(MINERAL_TYPES.keys));

        val allValidBlocks:ImmutableSet<Material> = ImmutableSet.Builder<Material>().addAll(glassBlocks).addAll(doorBlocks).addAll(mineralBlocks).addAll(colorBlocks).build()
        data class BlockSet(val blockTypes: Set<Material>, val offsets: (direction: ExitDirection) -> List<Vector>)
        val blockSets = listOf(
            BlockSet(glassBlocks, offsets = { it.glassOffsets }),
            BlockSet(doorBlocks, offsets = { it.doorOffsets }),
            BlockSet(colorBlocks, offsets = { listOf(it.colorOffset) }),
            BlockSet(mineralBlocks, offsets = { listOf(it.mineralOffset) })
        )
    }
    /** The direction a player faces when exiting the portal. */
    enum class ExitDirection(val toRight: Vector, val toBack: Vector, val doorDirection: BlockFace, val protoEnum: PortalSaveDataProtos.Portal.Direction) {
        NORTH(Vector(1, 0, 0), Vector(0, 0, 1), BlockFace.SOUTH, PortalSaveDataProtos.Portal.Direction.NORTH),
        SOUTH(Vector(-1, 0, 0), Vector(0, 0, -1), BlockFace.NORTH, PortalSaveDataProtos.Portal.Direction.SOUTH),
        EAST(Vector(0, 0, 1), Vector(-1, 0, 0), BlockFace.WEST, PortalSaveDataProtos.Portal.Direction.EAST),
        WEST(Vector(0, 0, -1), Vector(1, 0, 0), BlockFace.EAST, PortalSaveDataProtos.Portal.Direction.WEST);

        val glassOffsets: ImmutableList<Vector> = ImmutableList.of(
            // check corners first:
            // bottom left, front
            ZERO,
            // top right, back
            UP * 3 + toBack + toRight * 2,
            // bottom right, front
            toRight * 2,
            // top right, front
            UP * 3 + toRight * 2,
            // top left, front
            UP * 3,
            // bottom left, back
            toBack,
            // top left, back
            UP * 3 + toBack,
            // bottom right, back
            toBack + toRight * 2,

            // then do front walls
            // left front wall
            UP,
            UP * 2,
            // right front wall
            UP + toRight * 2,
            UP * 2 + toRight * 2,

            // now do the rest of the back
            // left back wall
            UP + toBack,
            UP * 2 + toBack,
            // center back wall
            toBack + toRight,
            UP + toBack + toRight,
            UP * 2 + toBack + toRight,
            UP * 3 + toBack + toRight,
            // right back wall
            UP + toBack + toRight * 2,
            UP * 2 + toBack + toRight * 2
        )

        val mineralOffset: Vector = toRight
        val colorOffset: Vector = UP * 3 + toRight

        val doorOffsets: ImmutableList<Vector> = ImmutableList.of(
            UP + toRight,
            UP * 2 + toRight
        )

        fun toProto():PortalSaveDataProtos.Portal.Direction {
            return this.protoEnum
        }
    }


    val portalCenter = lowerLeftFrontCorner + direction.doorOffsets[0]
    val midCenter = portalCenter + MID_BLOCK
    val fullPortalBoundingBox = BoundingBox.of(lowerLeftFrontCorner.block, (lowerLeftFrontCorner + UP * 3 + direction.toRight * 2 + direction.toBack).block)
    val portalInsideBoundingBox = BoundingBox.of(portalCenter.block, (portalCenter + UP).block)

    /** Gets the worldless location (direction and position vectors) relative to the center of the chamber, rotating so that the exit is north. */
    fun getRelativeLocationFromAbsoluteLocation(location: Location): Location {
        if (portalCenter.world != location.world) {
            throw IllegalArgumentException("can't get relative position from ${portalCenter.world} to ${location.world}")
        }
        if (portalCenter.world == null) {
            throw IllegalArgumentException("How did we end up with a relative portal center??")
        }
        val oldDirection = location.direction
        val translatedPosition = location.toVector() - (portalCenter + MID_BLOCK_BOTTOM).toVector()
        val newLocation = Location(null, translatedPosition.dot(direction.toRight), translatedPosition.dot(UP), translatedPosition.dot(direction.toBack), 0f, 0f)
        newLocation.direction = Vector(oldDirection.dot(direction.toRight), oldDirection.dot(UP), oldDirection.dot(direction.toBack))
        return newLocation
    }

    fun getAbsoluteLocationFromRelativeLocation(location: Location): Location {
        if (location.world != null) {
            throw IllegalArgumentException("can't get absolute position from already absolute position")
        }
        val world = portalCenter.world ?: throw IllegalArgumentException("How did we end up with a relative portal center??")
        val oldDirection = location.direction
        val oldPosition = location.toVector()
        val rotatedPosition = Vector(oldPosition.dot(direction.toRight), oldPosition.dot(UP), oldPosition.dot(direction.toBack))
        val newLocation = (rotatedPosition + portalCenter.toVector() + MID_BLOCK_BOTTOM).toLocation(world)
        newLocation.direction = Vector(oldDirection.dot(direction.toRight), oldDirection.dot(UP), oldDirection.dot(direction.toBack))
        return newLocation
    }

    val mineral = (lowerLeftFrontCorner + direction.mineralOffset).block.type
    var color: Material
        get() = (lowerLeftFrontCorner + direction.colorOffset).block.type
        set(newColor) {
            (lowerLeftFrontCorner + direction.colorOffset).block.type = newColor
        }

    fun open() {
        val block = portalCenter.block
        val data = block.blockData
        if (data is Openable) {
            data.isOpen = true
            block.blockData = data
        }
    }

    fun close() {
        val block = portalCenter.block
        val data = block.blockData
        if (data is Openable) {
            data.isOpen = false
            block.blockData = data
        }
    }

    fun ejectEntities() {
        val world = portalCenter.world ?: return
        for (entity in world.getNearbyEntities(portalInsideBoundingBox)) {
            // kick 'em out the front!
            entity.teleport(entity.location - direction.toBack)
        }
    }

    fun activate() {
        val mineral = (lowerLeftFrontCorner + direction.mineralOffset).block
        for (offset in direction.glassOffsets) {
            (lowerLeftFrontCorner + offset).block.type = MINERAL_TYPES.getOrDefault(mineral.type, GLASS)
        }
        portalCenter.world?.playSound(midCenter, Sound.ENTITY_EVOKER_CAST_SPELL, 1f, 1f)
        portalCenter.world?.spawnParticle(Particle.SPELL, midCenter, 75)
        open()
    }

    fun deactivate() {
        for (offset in direction.glassOffsets) {
            (lowerLeftFrontCorner + offset).block.type = GLASS
        }
        portalCenter.world?.playSound(midCenter, Sound.ENTITY_ILLUSIONER_CAST_SPELL, 1f, 1f)
        portalCenter.world?.spawnParticle(Particle.SMOKE_NORMAL, midCenter, 75)
    }

    fun isActivePortal(): Boolean {
        return checkPortalFrameAt(lowerLeftFrontCorner, direction, State.ACTIVE) == this
    }

    fun playPortalsLinkedEffect() {
        portalCenter.world?.playSound(midCenter, Sound.BLOCK_BEACON_ACTIVATE, 1f, 1f)
        portalCenter.world?.spawnParticle(Particle.SPELL, midCenter, 30)
    }

    fun playPortalsUnlinkedEffect() {
        portalCenter.world?.playSound(midCenter, Sound.BLOCK_BEACON_DEACTIVATE, 1f, 1f)
        portalCenter.world?.spawnParticle(Particle.SMOKE_NORMAL, midCenter, 30)
    }

    fun playTeleporterActivatedEffect() {
        portalCenter.world?.playSound(midCenter, Sound.BLOCK_PORTAL_TRIGGER, 1f, 1f)
    }

    fun playTeleportTravelEffect() {
        portalCenter.world?.playSound(midCenter, Sound.BLOCK_PORTAL_TRAVEL, 1f, 1f)
        portalCenter.world?.spawnParticle(Particle.FIREWORKS_SPARK, midCenter, 75)
    }

    fun getEntities(): Collection<Entity> {
        return portalCenter.world?.getNearbyEntities(portalInsideBoundingBox) ?: ImmutableList.of()
    }

    fun playTeleporterActiveEffect() {
        portalCenter.world?.spawnParticle(Particle.SPELL_MOB_AMBIENT, midCenter, 10)
    }

    fun playTeleportCanceledEffect() {
        portalCenter.world?.playSound(midCenter, Sound.BLOCK_LAVA_EXTINGUISH, 1f, 1f)
        portalCenter.world?.spawnParticle(Particle.SMOKE_NORMAL, midCenter, 30)
    }

    inner class MakePortalSound : BukkitRunnable() {
        override fun run() {
            portalCenter.world?.playSound(portalCenter + MID_BLOCK, Sound.BLOCK_PORTAL_AMBIENT, 0.1f, 0f)
        }
    }
    inner class MakePortalSparkles : BukkitRunnable() {
        override fun run() {
            portalCenter.world?.spawnParticle(Particle.PORTAL, portalCenter + MID_BLOCK, 20)
        }
    }
}