/*
 * This file ("OreGen.java") is part of the Actually Additions mod for Minecraft.
 * It is created and owned by Ellpeck and distributed
 * under the Actually Additions License to be found at
 * http://ellpeck.de/actaddlicense
 * View the source code at https://github.com/Ellpeck/ActuallyAdditions
 *
 * © 2015-2017 Ellpeck
 */

package de.ellpeck.actuallyadditions.mod.gen;

import java.util.ArrayList;
import java.util.Random;

import org.apache.commons.lang3.ArrayUtils;

import de.ellpeck.actuallyadditions.mod.ActuallyAdditions;
import de.ellpeck.actuallyadditions.mod.blocks.BlockMisc;
import de.ellpeck.actuallyadditions.mod.blocks.BlockWildPlant;
import de.ellpeck.actuallyadditions.mod.blocks.InitBlocks;
import de.ellpeck.actuallyadditions.mod.blocks.metalists.TheMiscBlocks;
import de.ellpeck.actuallyadditions.mod.blocks.metalists.TheWildPlants;
import de.ellpeck.actuallyadditions.mod.config.values.ConfigBoolValues;
import de.ellpeck.actuallyadditions.mod.config.values.ConfigIntListValues;
import de.ellpeck.actuallyadditions.mod.config.values.ConfigIntValues;
import de.ellpeck.actuallyadditions.mod.util.WorldUtil;
import net.minecraft.block.Block;
import net.minecraft.block.BlockHorizontal;
import net.minecraft.block.material.Material;
import net.minecraft.block.state.IBlockState;
import net.minecraft.block.state.pattern.BlockMatcher;
import net.minecraft.init.Blocks;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.MathHelper;
import net.minecraft.world.World;
import net.minecraft.world.WorldType;
import net.minecraft.world.biome.BiomeOcean;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.gen.IChunkGenerator;
import net.minecraft.world.gen.feature.WorldGenMinable;
import net.minecraft.world.gen.structure.StructureBoundingBox;
import net.minecraftforge.event.terraingen.DecorateBiomeEvent;
import net.minecraftforge.event.terraingen.DecorateBiomeEvent.Decorate.EventType;
import net.minecraftforge.fml.common.IWorldGenerator;
import net.minecraftforge.fml.common.eventhandler.Event;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;

public class AAWorldGen implements IWorldGenerator {

    public static final int QUARTZ_MIN = 0;
    public static final int QUARTZ_MAX = 45;

    private final WorldGenLushCaves caveGen = new WorldGenLushCaves();

    public AAWorldGen() {
        ActuallyAdditions.LOGGER.info("Registering World Generator...");
    }

    @Override
    public void generate(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {
        int dimension = world.provider.getDimension();
        if (dimension != -1 && dimension != 1) {
            if (world.getWorldType() != WorldType.FLAT && canGen(world.provider.getDimension())) {
                this.generateDefault(world, random, chunkX, chunkZ);
            }
        }
    }

    private boolean canGen(int dimension) {
        boolean inList = ArrayUtils.contains(ConfigIntListValues.ORE_GEN_DIMENSION_BLACKLIST.getValue(), dimension);
        return (inList && ConfigBoolValues.ORE_GEN_DIM_WHITELIST.isEnabled()) || (!inList && !ConfigBoolValues.ORE_GEN_DIM_WHITELIST.isEnabled());
    }

    private void generateDefault(World world, Random random, int x, int z) {
        if (ConfigBoolValues.GENERATE_QUARTZ.isEnabled()) {
            this.addOreSpawn(InitBlocks.blockMisc.getDefaultState().withProperty(BlockMisc.TYPE, TheMiscBlocks.ORE_QUARTZ), Blocks.STONE, world, random, x * 16, z * 16, MathHelper.getInt(random, 5, 8), 10, QUARTZ_MIN, QUARTZ_MAX);
        }

        if (ConfigBoolValues.GEN_LUSH_CAVES.isEnabled()) {

            int randConst = 0x969ce69d;//so that it won't generate the same numbers as other mod that does the same thing
            Random chunkRand = new Random(randConst ^ world.getSeed() ^ (x * 29 + z * 31));

            StructureBoundingBox box = new StructureBoundingBox(x * 16 + 8, 0, z * 16 + 8, x * 16 + 8 + 15, 255, z * 16 + 8 + 15);
            if (chunkRand.nextInt(ConfigIntValues.LUSH_CAVE_CHANCE.getValue()) <= 0) {
                BlockPos randPos = world.getTopSolidOrLiquidBlock(new BlockPos(x * 16 + MathHelper.getInt(random, 6, 10), 0, z * 16 + MathHelper.getInt(random, 6, 10)));
                BlockPos pos = randPos.down(MathHelper.getInt(chunkRand, 15, randPos.getY() - 15));

                this.caveGen.generate(world, chunkRand, pos, box);
            }
        }
    }

    public void addOreSpawn(IBlockState state, Block blockIn, World world, Random random, int blockXPos, int blockZPos, int maxVeinSize, int chancesToSpawn, int minY, int maxY) {
        for (int i = 0; i < chancesToSpawn; i++) {
            int posX = blockXPos + random.nextInt(16);
            int posY = minY + random.nextInt(maxY - minY);
            int posZ = blockZPos + random.nextInt(16);
            new WorldGenMinable(state, maxVeinSize, BlockMatcher.forBlock(blockIn)).generate(world, random, new BlockPos(posX, posY, posZ));
        }
    }

    @SubscribeEvent
    public void onWorldDecoration(DecorateBiomeEvent.Decorate event) {
        if ((event.getResult() == Event.Result.ALLOW || event.getResult() == Event.Result.DEFAULT)) {
            if (event.getType() == EventType.FLOWERS) {
                if (!ArrayUtils.contains(ConfigIntListValues.PLANT_DIMENSION_BLACKLIST.getValue(), event.getWorld().provider.getDimension())) {
                    this.generateRice(event);
                    IBlockState plantDefault = InitBlocks.blockWildPlant.getDefaultState();
                    this.genPlantNormally(plantDefault.withProperty(BlockWildPlant.TYPE, TheWildPlants.CANOLA), ConfigIntValues.CANOLA_AMOUNT.getValue(), ConfigBoolValues.DO_CANOLA_GEN.isEnabled(), Material.GRASS, event);
                    this.genPlantNormally(plantDefault.withProperty(BlockWildPlant.TYPE, TheWildPlants.FLAX), ConfigIntValues.FLAX_AMOUNT.getValue(), ConfigBoolValues.DO_FLAX_GEN.isEnabled(), Material.GRASS, event);
                    this.genPlantNormally(plantDefault.withProperty(BlockWildPlant.TYPE, TheWildPlants.COFFEE), ConfigIntValues.COFFEE_AMOUNT.getValue(), ConfigBoolValues.DO_COFFEE_GEN.isEnabled(), Material.GRASS, event);
                    this.genPlantNormally(InitBlocks.blockBlackLotus.getDefaultState(), ConfigIntValues.BLACK_LOTUS_AMOUNT.getValue(), ConfigBoolValues.DO_LOTUS_GEN.isEnabled(), Material.GRASS, event);
                }
            }

            if (event.getType() == EventType.LILYPAD) {
                //Generate Treasure Chests
                if (ConfigBoolValues.DO_TREASURE_CHEST_GEN.isEnabled()) {
                    if (event.getRand().nextInt(40) == 0) {
                        BlockPos randomPos = event.getChunkPos().getBlock(event.getRand().nextInt(16) + 8, 0, event.getRand().nextInt(16) + 8);
                        randomPos = event.getWorld().getTopSolidOrLiquidBlock(randomPos);

                        if (event.getWorld().getBiome(randomPos) instanceof BiomeOcean) {
                            if (randomPos.getY() >= 25 && randomPos.getY() <= 45) {
                                if (event.getWorld().getBlockState(randomPos).getMaterial() == Material.WATER) {
                                    if (event.getWorld().getBlockState(randomPos.down()).getMaterial().isSolid()) {
                                        event.getWorld().setBlockState(randomPos, InitBlocks.blockTreasureChest.getDefaultState().withProperty(BlockHorizontal.FACING, EnumFacing.byHorizontalIndex(event.getRand().nextInt(4))), 2);
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }

    private void generateRice(DecorateBiomeEvent event) {
        if (ConfigBoolValues.DO_RICE_GEN.isEnabled()) {
            for (int i = 0; i < ConfigIntValues.RICE_AMOUNT.getValue(); i++) {
                if (event.getRand().nextInt(3) == 0) {
                    BlockPos randomPos = event.getChunkPos().getBlock(event.getRand().nextInt(16) + 8, 0, event.getRand().nextInt(16) + 8);
                    randomPos = event.getWorld().getTopSolidOrLiquidBlock(randomPos);
                    if (event.getWorld().getBlockState(randomPos).getMaterial() == Material.WATER) {
                        ArrayList<Material> blocksAroundBottom = WorldUtil.getMaterialsAround(event.getWorld(), randomPos);
                        BlockPos posToGenAt = randomPos.up();
                        ArrayList<Material> blocksAroundTop = WorldUtil.getMaterialsAround(event.getWorld(), posToGenAt);
                        if (blocksAroundBottom.contains(Material.GRASS) || blocksAroundBottom.contains(Material.GROUND) || blocksAroundBottom.contains(Material.ROCK) || blocksAroundBottom.contains(Material.SAND)) {
                            if (!blocksAroundTop.contains(Material.WATER) && event.getWorld().getBlockState(posToGenAt).getMaterial() == Material.AIR) {
                                event.getWorld().setBlockState(posToGenAt, InitBlocks.blockWildPlant.getDefaultState().withProperty(BlockWildPlant.TYPE, TheWildPlants.RICE), 2);
                            }
                        }
                    }
                }
            }
        }
    }

    private void genPlantNormally(IBlockState plant, int amount, boolean doIt, Material blockBelow, DecorateBiomeEvent event) {
        if (doIt) {
            for (int i = 0; i < amount; i++) {
                if (event.getRand().nextInt(100) == 0) {
                    BlockPos randomPos = event.getChunkPos().getBlock(event.getRand().nextInt(16) + 8, 0, event.getRand().nextInt(16) + 8);
                    randomPos = event.getWorld().getTopSolidOrLiquidBlock(randomPos);

                    if (event.getWorld().getBlockState(randomPos.down()).getMaterial() == blockBelow) {
                        if (plant.getBlock().canPlaceBlockAt(event.getWorld(), randomPos) && event.getWorld().isAirBlock(randomPos)) {
                            event.getWorld().setBlockState(randomPos, plant, 2);
                        }
                    }
                }
            }
        }
    }
}