package com.plotsquared.bukkit.util;

import com.plotsquared.bukkit.BukkitMain;
import com.plotsquared.bukkit.player.BukkitPlayer;
import com.plotsquared.PlotSquared;
import com.plotsquared.config.Captions;
import com.plotsquared.location.Location;
import com.plotsquared.plot.Plot;
import com.plotsquared.player.PlotPlayer;
import com.plotsquared.util.tasks.RunnableVal;
import com.plotsquared.util.MainUtil;
import com.plotsquared.util.MathMan;
import com.plotsquared.util.StringComparison;
import com.plotsquared.util.tasks.TaskManager;
import com.plotsquared.util.uuid.UUIDHandler;
import com.plotsquared.util.WorldUtil;
import com.plotsquared.util.BlockUtil;
import com.sk89q.worldedit.bukkit.BukkitAdapter;
import com.sk89q.worldedit.bukkit.BukkitWorld;
import com.sk89q.worldedit.regions.CuboidRegion;
import com.sk89q.worldedit.world.biome.BiomeType;
import com.sk89q.worldedit.world.block.BlockState;
import io.papermc.lib.PaperLib;
import lombok.NonNull;
import org.bukkit.Bukkit;
import org.bukkit.Chunk;
import org.bukkit.Material;
import org.bukkit.OfflinePlayer;
import org.bukkit.World;
import org.bukkit.block.Biome;
import org.bukkit.block.Block;
import org.bukkit.block.BlockFace;
import org.bukkit.block.Sign;
import org.bukkit.block.data.Directional;
import org.bukkit.block.data.type.WallSign;
import org.bukkit.entity.Entity;
import org.bukkit.entity.Player;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.UUID;
import java.util.function.Consumer;
import java.util.function.IntConsumer;


@SuppressWarnings({"unused", "WeakerAccess"})
public class BukkitUtil extends WorldUtil {

    private static Method biomeSetter;
    static {
        try {
            biomeSetter = World.class.getMethod("setBiome", Integer.class, Integer.class, Biome.class);
        } catch (final Exception ignored) {
        }
    }

    private static String lastString = null;
    private static World lastWorld = null;

    private static Player lastPlayer = null;
    private static PlotPlayer lastPlotPlayer = null;

    public static void removePlayer(String player) {
        lastPlayer = null;
        lastPlotPlayer = null;
    }

    public static PlotPlayer getPlayer(@NonNull final OfflinePlayer op) {
        if (op.isOnline()) {
            return getPlayer(op.getPlayer());
        }
        final Player player = OfflinePlayerUtil.loadPlayer(op);
        player.loadData();
        return new BukkitPlayer(player, true);
    }

    /**
     * Get a plot based on the location.
     *
     * @param location the location to check
     * @return plot if found, otherwise it creates a temporary plot
     * @see Plot
     */
    public static Plot getPlot(org.bukkit.Location location) {
        if (location == null) {
            return null;
        }
        return getLocation(location).getPlot();
    }

    /**
     * Get a plot based on the player location.
     *
     * @param player the player to check
     * @return plot if found, otherwise it creates a temporary plot
     * @see #getPlot(org.bukkit.Location)
     * @see Plot
     */
    public static Plot getPlot(Player player) {
        return getPlot(player.getLocation());
    }

    /**
     * Get the PlotPlayer for an offline player.
     *
     * <p>Note that this will work if the player is offline, however not all
     * functionality will work.
     *
     * @param player the player to wrap
     * @return a {@code PlotPlayer}
     * @see PlotPlayer#wrap(Object)
     */
    public static PlotPlayer wrapPlayer(OfflinePlayer player) {
        return PlotPlayer.wrap(player);
    }

    /**
     * Gets the PlotPlayer for a player. The PlotPlayer is usually cached and
     * will provide useful functions relating to players.
     *
     * @param player the player to wrap
     * @return a {@code PlotPlayer}
     * @see PlotPlayer#wrap(Object)
     */
    public static PlotPlayer wrapPlayer(Player player) {
        return PlotPlayer.wrap(player);
    }

    /**
     * Gets the PlotPlayer for a UUID. The PlotPlayer is usually cached and
     * will provide useful functions relating to players.
     *
     * @param uuid the uuid to wrap
     * @return a {@code PlotPlayer}
     * @see PlotPlayer#wrap(Object)
     */
    @Override public PlotPlayer wrapPlayer(UUID uuid) {
        return PlotPlayer.wrap(Bukkit.getOfflinePlayer(uuid));
    }

    /**
     * Gets the number of plots, which the player is able to build in.
     *
     * @param player player, for whom we're getting the plots
     * @return the number of allowed plots
     */
    public static int getAllowedPlots(Player player) {
        PlotPlayer plotPlayer = PlotPlayer.wrap(player);
        return plotPlayer.getAllowedPlots();
    }

    /**
     * Check whether or not a player is in a plot.
     *
     * @param player who we're checking for
     * @return true if the player is in a plot, false if not-
     */
    public static boolean isInPlot(Player player) {
        return getPlot(player) != null;
    }

    /**
     * Gets a collection containing the players plots.
     *
     * @param world  Specify the world we want to select the plots from
     * @param player Player, for whom we're getting the plots
     * @return a set containing the players plots
     * @see Plot
     */
    public static Set<Plot> getPlayerPlots(String world, Player player) {
        if (world == null) {
            return new HashSet<>();
        }
        return PlotPlayer.wrap(player).getPlots(world);
    }

    /**
     * Send a message to a player. The message supports color codes.
     *
     * @param player the recipient of the message
     * @param string the message
     * @see MainUtil#sendMessage(PlotPlayer, String)
     */
    public static void sendMessage(Player player, String string) {
        MainUtil.sendMessage(BukkitUtil.getPlayer(player), string);
    }

    /**
     * Gets the player plot count.
     *
     * @param world  Specify the world we want to select the plots from
     * @param player Player, for whom we're getting the plot count
     * @return the number of plots the player has
     */
    public static int getPlayerPlotCount(String world, Player player) {
        if (world == null) {
            return 0;
        }
        return BukkitUtil.getPlayer(player).getPlotCount(world);
    }

    /**
     * Send a message to a player.
     *
     * @param player  the recipient of the message
     * @param caption the message
     */
    public static void sendMessage(Player player, Captions caption) {
        MainUtil.sendMessage(BukkitUtil.getPlayer(player), caption);
    }

    public static PlotPlayer getPlayer(@NonNull final Player player) {
        if (player == lastPlayer) {
            return lastPlotPlayer;
        }
        final String name = player.getName();
        final PlotPlayer plotPlayer = UUIDHandler.getPlayer(name);
        if (plotPlayer != null) {
            return plotPlayer;
        }
        lastPlotPlayer = new BukkitPlayer(player);
        UUIDHandler.getPlayers().put(name, lastPlotPlayer);
        lastPlayer = player;
        return lastPlotPlayer;
    }

    public static Location getLocation(@NonNull final org.bukkit.Location location) {
        return new Location(location.getWorld().getName(), MathMan.roundInt(location.getX()),
            MathMan.roundInt(location.getY()), MathMan.roundInt(location.getZ()));
    }

    public static Location getLocationFull(@NonNull final org.bukkit.Location location) {
        return new Location(location.getWorld().getName(), MathMan.roundInt(location.getX()),
            MathMan.roundInt(location.getY()), MathMan.roundInt(location.getZ()), location.getYaw(),
            location.getPitch());
    }

    public static org.bukkit.Location getLocation(@NonNull final Location location) {
        return new org.bukkit.Location(getWorld(location.getWorld()), location.getX(),
            location.getY(), location.getZ());
    }

    public static World getWorld(@NonNull final String string) {
        return Bukkit.getWorld(string);
    }

    public static String getWorld(@NonNull final Entity entity) {
        return entity.getWorld().getName();
    }

    public static List<Entity> getEntities(@NonNull final String worldName) {
        World world = getWorld(worldName);
        if (world != null) {
            return world.getEntities();
        } else {
            return new ArrayList<>();
        }
    }

    public static Location getLocation(@NonNull final Entity entity) {
        final org.bukkit.Location location = entity.getLocation();
        String world = location.getWorld().getName();
        return new Location(world, location.getBlockX(), location.getBlockY(),
            location.getBlockZ());
    }

    @NotNull public static Location getLocationFull(@NonNull final Entity entity) {
        final org.bukkit.Location location = entity.getLocation();
        return new Location(location.getWorld().getName(), MathMan.roundInt(location.getX()),
            MathMan.roundInt(location.getY()), MathMan.roundInt(location.getZ()), location.getYaw(),
            location.getPitch());
    }

    public static Material getMaterial(@NonNull final BlockState plotBlock) {
        return BukkitAdapter.adapt(plotBlock.getBlockType());
    }

    @Override public boolean isBlockSame(BlockState block1, BlockState block2) {
        if (block1.equals(block2)) {
            return true;
        }
        Material mat1 = getMaterial(block1), mat2 = getMaterial(block2);
        return mat1 == mat2;
    }

    @Override public boolean isWorld(@NonNull final String worldName) {
        return getWorld(worldName) != null;
    }

    @Override public void getBiome(String world, int x, int z, final Consumer<BiomeType> result) {
        ensureLoaded(world, x, z, chunk ->
            result.accept(BukkitAdapter.adapt(getWorld(world).getBiome(x, z))));
    }

    @Override public BiomeType getBiomeSynchronous(String world, int x, int z) {
        return BukkitAdapter.adapt(getWorld(world).getBiome(x, z));
    }

    @Override public void getHighestBlock(@NonNull final String world, final int x, final int z,
        final IntConsumer result) {
        ensureLoaded(world, x, z, chunk -> {
            final World bukkitWorld = getWorld(world);
            // Skip top and bottom block
            int air = 1;
            for (int y = bukkitWorld.getMaxHeight() - 1; y >= 0; y--) {
                Block block = bukkitWorld.getBlockAt(x, y, z);
                Material type = block.getType();
                if (type.isSolid()) {
                    if (air > 1) {
                        result.accept(y);
                        return;
                    }
                    air = 0;
                } else {
                    if (block.isLiquid()) {
                        result.accept(y);
                        return;
                    }
                    air++;
                }
            }
            result.accept(bukkitWorld.getMaxHeight() - 1);
        });
    }

    @Override public int getHighestBlockSynchronous(String world, int x, int z) {
        final World bukkitWorld = getWorld(world);
        // Skip top and bottom block
        int air = 1;
        for (int y = bukkitWorld.getMaxHeight() - 1; y >= 0; y--) {
            Block block = bukkitWorld.getBlockAt(x, y, z);
            Material type = block.getType();
            if (type.isSolid()) {
                if (air > 1) {
                    return y;
                }
                air = 0;
            } else {
                if (block.isLiquid()) {
                    return y;
                }
                air++;
            }
        }
        return bukkitWorld.getMaxHeight() - 1;
    }

    @Override public void getSign(@NonNull final Location location, final Consumer<String[]> result) {
        ensureLoaded(location, chunk -> {
            final Block block = chunk.getWorld().getBlockAt(getLocation(location));
            if (block.getState() instanceof Sign) {
                Sign sign = (Sign) block.getState();
                result.accept(sign.getLines());
            }
        });
    }

    @Override @Nullable public String[] getSignSynchronous(@NonNull final Location location) {
        Block block = getWorld(location.getWorld())
            .getBlockAt(location.getX(), location.getY(), location.getZ());
        return TaskManager.IMP.sync(new RunnableVal<String[]>() {
            @Override public void run(String[] value) {
                if (block.getState() instanceof Sign) {
                    Sign sign = (Sign) block.getState();
                    this.value = sign.getLines();
                }
            }
        });
    }

    @Override public Location getSpawn(@NonNull final String world) {
        final org.bukkit.Location temp = getWorld(world).getSpawnLocation();
        return new Location(world, temp.getBlockX(), temp.getBlockY(), temp.getBlockZ(),
            temp.getYaw(), temp.getPitch());
    }

    @Override public void setSpawn(@NonNull final Location location) {
        final World world = getWorld(location.getWorld());
        if (world != null) {
            world.setSpawnLocation(location.getX(), location.getY(), location.getZ());
        }
    }

    @Override public void saveWorld(@NonNull final String worldName) {
        final World world = getWorld(worldName);
        if (world != null) {
            world.save();
        }
    }

    @Override @SuppressWarnings("deprecation")
    public void setSign(@NonNull final String worldName, final int x, final int y, final int z,
        @NonNull final String[] lines) {
        ensureLoaded(worldName, x, z, chunk -> {
            final World world = getWorld(worldName);
            final Block block = world.getBlockAt(x, y, z);
            //        block.setType(Material.AIR);
            final Material type = block.getType();
            if (type != Material.LEGACY_SIGN && type != Material.LEGACY_WALL_SIGN) {
                BlockFace facing = BlockFace.EAST;
                if (world.getBlockAt(x, y, z + 1).getType().isSolid()) {
                    facing = BlockFace.NORTH;
                } else if (world.getBlockAt(x + 1, y, z).getType().isSolid()) {
                    facing = BlockFace.WEST;
                } else if (world.getBlockAt(x, y, z - 1).getType().isSolid()) {
                    facing = BlockFace.SOUTH;
                }
                if (PlotSquared.get().IMP.getServerVersion()[1] == 13) {
                    block.setType(Material.valueOf("WALL_SIGN"), false);
                } else {
                    block.setType(Material.valueOf("OAK_WALL_SIGN"), false);
                }
                if (!(block.getBlockData() instanceof WallSign)) {
                    PlotSquared.debug(block.getBlockData().getAsString());
                    throw new RuntimeException("Something went wrong generating a sign");
                }
                final Directional sign = (Directional) block.getBlockData();
                sign.setFacing(facing);
                block.setBlockData(sign, false);
            }
            final org.bukkit.block.BlockState blockstate = block.getState();
            if (blockstate instanceof Sign) {
                final Sign sign = (Sign) blockstate;
                for (int i = 0; i < lines.length; i++) {
                    sign.setLine(i, lines[i]);
                }
                sign.update(true);
            }
        });
    }

    @Override public boolean isBlockSolid(@NonNull final BlockState block) {
        return block.getBlockType().getMaterial().isSolid();
    }

    @Override public String getClosestMatchingName(@NonNull final BlockState block) {
        try {
            return getMaterial(block).name();
        } catch (Exception ignored) {
            return null;
        }
    }

    @Override @Nullable
    public StringComparison<BlockState>.ComparisonResult getClosestBlock(String name) {
        BlockState state = BlockUtil.get(name);
        return new StringComparison<BlockState>().new ComparisonResult(1, state);
    }

    @Override
    public void setBiomes(@NonNull final String worldName, @NonNull final CuboidRegion region,
        @NonNull final BiomeType biomeType) {
        final World world = getWorld(worldName);
        if (world == null) {
            PlotSquared.log("An error occurred setting the biome because the world was null.");
            return;
        }
        final Biome biome = BukkitAdapter.adapt(biomeType);
        for (int x = region.getMinimumPoint().getX(); x <= region.getMaximumPoint().getX(); x++) {
            for (int z = region.getMinimumPoint().getZ();
                 z <= region.getMaximumPoint().getZ(); z++) {
                for (int y = 0; y < world.getMaxHeight(); y++) {
                    try {
                        if (biomeSetter != null) {
                            biomeSetter.invoke(world, x, z, biome);
                        } else {
                            world.setBiome(x, y, z, biome);
                        }
                    } catch (final Exception e) {
                        PlotSquared.log("An error occurred setting the biome:");
                        e.printStackTrace();
                    }
                }
            }
        }
    }

    public com.sk89q.worldedit.world.World getWeWorld(String world) {
        return new BukkitWorld(Bukkit.getWorld(world));
    }

    @Override public void getBlock(@NonNull final Location location, final Consumer<BlockState> result) {
        ensureLoaded(location, chunk -> {
            final World world = getWorld(location.getWorld());
            final Block block = world.getBlockAt(location.getX(), location.getY(), location.getZ());
            result.accept(BukkitAdapter.asBlockType(block.getType()).getDefaultState());
        });
    }

    @Override public BlockState getBlockSynchronous(@NonNull final Location location) {
        final World world = getWorld(location.getWorld());
        final Block block = world.getBlockAt(location.getX(), location.getY(), location.getZ());
        return BukkitAdapter.asBlockType(block.getType()).getDefaultState();
    }

    @Override public String getMainWorld() {
        return Bukkit.getWorlds().get(0).getName();
    }

    @Override public double getHealth(PlotPlayer player) {
        return Bukkit.getPlayer(player.getUUID()).getHealth();
    }

    @Override public int getFoodLevel(PlotPlayer player) {
        return Bukkit.getPlayer(player.getUUID()).getFoodLevel();
    }

    @Override public void setHealth(PlotPlayer player, double health) {
        Bukkit.getPlayer(player.getUUID()).setHealth(health);
    }

    @Override public void setFoodLevel(PlotPlayer player, int foodLevel) {
        Bukkit.getPlayer(player.getUUID()).setFoodLevel(foodLevel);
    }

    private static void ensureLoaded(final String world, final int x, final int z, final Consumer<Chunk> chunkConsumer) {
        PaperLib.getChunkAtAsync(getWorld(world), x >> 4, z >> 4, true).thenAccept(chunk ->
            ensureMainThread(chunkConsumer, chunk));
    }

    private static void ensureLoaded(final Location location, final Consumer<Chunk> chunkConsumer) {
        PaperLib.getChunkAtAsync(getLocation(location), true).thenAccept(chunk ->
            ensureMainThread(chunkConsumer, chunk));
    }

    private static <T> void ensureMainThread(final Consumer<T> consumer, final T value) {
        if (Bukkit.isPrimaryThread()) {
            consumer.accept(value);
        } else {
            Bukkit.getScheduler().runTask(BukkitMain.getPlugin(BukkitMain.class), () ->
                consumer.accept(value));
        }
    }

}