package com.earth2me.essentials;

import com.earth2me.essentials.storage.AsyncStorageObjectHolder;
import net.ess3.api.IEssentials;
import net.ess3.api.IUser;
import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.entity.Entity;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockBreakEvent;
import org.bukkit.event.block.BlockDamageEvent;
import org.bukkit.event.block.BlockPlaceEvent;
import org.bukkit.event.entity.EntityDamageByEntityEvent;
import org.bukkit.event.entity.EntityDamageEvent.DamageCause;
import org.bukkit.event.player.PlayerGameModeChangeEvent;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerRespawnEvent;
import org.bukkit.event.player.PlayerTeleportEvent;
import org.bukkit.event.player.PlayerTeleportEvent.TeleportCause;
import org.bukkit.plugin.PluginManager;

import java.io.File;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Locale;
import java.util.concurrent.CompletableFuture;
import java.util.logging.Level;
import java.util.logging.Logger;

import static com.earth2me.essentials.I18n.tl;

public class Jails extends AsyncStorageObjectHolder<com.earth2me.essentials.settings.Jails> implements net.ess3.api.IJails {
    private static final transient Logger LOGGER = Bukkit.getLogger();
    private static transient boolean enabled = false;

    public Jails(final IEssentials ess) {
        super(ess, com.earth2me.essentials.settings.Jails.class);
        reloadConfig();
    }

    private void registerListeners() {
        enabled = true;
        final PluginManager pluginManager = ess.getServer().getPluginManager();
        final JailListener blockListener = new JailListener();
        pluginManager.registerEvents(blockListener, ess);
        if (ess.getSettings().isDebug()) {
            LOGGER.log(Level.INFO, "Registering Jail listener");
        }
    }

    @Override
    public File getStorageFile() {
        return new File(ess.getDataFolder(), "jail.yml");
    }

    @Override
    public void finishRead() {
        checkRegister();
    }

    @Override
    public void finishWrite() {
        checkRegister();
    }

    public void resetListener() {
        enabled = false;
        checkRegister();
    }

    private void checkRegister() {
        if (!enabled && getCount() > 0) {
            registerListeners();
        }
    }

    @Override
    public Location getJail(final String jailName) throws Exception {
        acquireReadLock();
        try {
            if (getData().getJails() == null || jailName == null || !getData().getJails().containsKey(jailName.toLowerCase(Locale.ENGLISH))) {
                throw new Exception(tl("jailNotExist"));
            }
            final Location loc = getData().getJails().get(jailName.toLowerCase(Locale.ENGLISH));
            if (loc == null || loc.getWorld() == null) {
                throw new Exception(tl("jailNotExist"));
            }
            return loc;
        } finally {
            unlock();
        }
    }

    @Override
    public Collection<String> getList() throws Exception {
        acquireReadLock();
        try {
            if (getData().getJails() == null) {
                return Collections.emptyList();
            }
            return new ArrayList<>(getData().getJails().keySet());
        } finally {
            unlock();
        }
    }

    @Override
    public void removeJail(final String jail) throws Exception {
        acquireWriteLock();
        try {
            if (getData().getJails() == null) {
                return;
            }
            getData().getJails().remove(jail.toLowerCase(Locale.ENGLISH));
        } finally {
            unlock();
        }
    }

    /**
     * @deprecated This method does not use asynchronous teleportation. Use {@link Jails#sendToJail(IUser, String, CompletableFuture)}
     */
    @Override
    @Deprecated
    public void sendToJail(final IUser user, final String jail) throws Exception {
        acquireReadLock();
        try {
            if (user.getBase().isOnline()) {
                final Location loc = getJail(jail);
                user.getTeleport().now(loc, false, TeleportCause.COMMAND);
            }
            user.setJail(jail);
        } finally {
            unlock();
        }
    }

    @Override
    public void sendToJail(final IUser user, final String jail, final CompletableFuture<Boolean> future) throws Exception {
        acquireReadLock();
        try {
            if (user.getBase().isOnline()) {
                final Location loc = getJail(jail);
                user.getAsyncTeleport().now(loc, false, TeleportCause.COMMAND, future);
                future.thenAccept(success -> user.setJail(jail));
                return;
            }
            user.setJail(jail);
        } finally {
            unlock();
        }
    }

    @Override
    public void setJail(final String jailName, final Location loc) throws Exception {
        acquireWriteLock();
        try {
            if (getData().getJails() == null) {
                getData().setJails(new HashMap<>());
            }
            getData().getJails().put(jailName.toLowerCase(Locale.ENGLISH), loc);
        } finally {
            unlock();
        }
    }

    @Override
    public int getCount() {
        try {
            return getList().size();
        } catch (final Exception ex) {
            return 0;
        }
    }

    private class JailListener implements Listener {
        @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
        public void onJailBlockBreak(final BlockBreakEvent event) {
            final User user = ess.getUser(event.getPlayer());
            if (user.isJailed() && !user.isAuthorized("essentials.jail.allow-break")) {
                event.setCancelled(true);
            }
        }

        @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
        public void onJailBlockPlace(final BlockPlaceEvent event) {
            final User user = ess.getUser(event.getPlayer());
            if (user.isJailed() && !user.isAuthorized("essentials.jail.allow-place")) {
                event.setCancelled(true);
            }
        }

        @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
        public void onJailBlockDamage(final BlockDamageEvent event) {
            final User user = ess.getUser(event.getPlayer());
            if (user.isJailed() && !user.isAuthorized("essentials.jail.allow-block-damage")) {
                event.setCancelled(true);
            }
        }

        @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
        public void onJailEntityDamageByEntity(final EntityDamageByEntityEvent event) {
            if (event.getCause() != DamageCause.ENTITY_ATTACK || event.getEntity().getType() != EntityType.PLAYER) {
                return;
            }
            final Entity damager = event.getDamager();
            if (damager.getType() == EntityType.PLAYER) {
                final User user = ess.getUser((Player) damager);
                if (user != null && user.isJailed()) {
                    event.setCancelled(true);
                }
            }
        }

        @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
        public void onJailPlayerInteract(final PlayerInteractEvent event) {
            final User user = ess.getUser(event.getPlayer());
            if (user.isJailed() && !user.isAuthorized("essentials.jail.allow-interact")) {
                event.setCancelled(true);
            }
        }

        @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
        public void onJailPlayerGameModeChange(final PlayerGameModeChangeEvent event) {
            final User user = ess.getUser(event.getPlayer());
            if (user.isJailed()) {
                event.setCancelled(true);
            }
        }

        @EventHandler(priority = EventPriority.HIGHEST)
        public void onJailPlayerRespawn(final PlayerRespawnEvent event) {
            final User user = ess.getUser(event.getPlayer());
            if (!user.isJailed() || user.getJail() == null || user.getJail().isEmpty()) {
                return;
            }

            try {
                event.setRespawnLocation(getJail(user.getJail()));
            } catch (final Exception ex) {
                if (ess.getSettings().isDebug()) {
                    LOGGER.log(Level.INFO, tl("returnPlayerToJailError", user.getName(), ex.getLocalizedMessage()), ex);
                } else {
                    LOGGER.log(Level.INFO, tl("returnPlayerToJailError", user.getName(), ex.getLocalizedMessage()));
                }
            }
        }

        @EventHandler(priority = EventPriority.HIGH)
        public void onJailPlayerTeleport(final PlayerTeleportEvent event) {
            final User user = ess.getUser(event.getPlayer());
            if (!user.isJailed() || user.getJail() == null || user.getJail().isEmpty()) {
                return;
            }

            try {
                event.setTo(getJail(user.getJail()));
            } catch (final Exception ex) {
                if (ess.getSettings().isDebug()) {
                    LOGGER.log(Level.INFO, tl("returnPlayerToJailError", user.getName(), ex.getLocalizedMessage()), ex);
                } else {
                    LOGGER.log(Level.INFO, tl("returnPlayerToJailError", user.getName(), ex.getLocalizedMessage()));
                }
            }
            user.sendMessage(tl("jailMessage"));
        }

        @EventHandler(priority = EventPriority.HIGHEST)
        public void onJailPlayerJoin(final PlayerJoinEvent event) {
            final User user = ess.getUser(event.getPlayer());
            final long currentTime = System.currentTimeMillis();
            user.checkJailTimeout(currentTime);
            if (!user.isJailed() || user.getJail() == null || user.getJail().isEmpty()) {
                return;
            }

            final CompletableFuture<Boolean> future = new CompletableFuture<>();
            future.exceptionally(ex -> {
                if (ess.getSettings().isDebug()) {
                    LOGGER.log(Level.INFO, tl("returnPlayerToJailError", user.getName(), ex.getLocalizedMessage()), ex);
                } else {
                    LOGGER.log(Level.INFO, tl("returnPlayerToJailError", user.getName(), ex.getLocalizedMessage()));
                }
                return false;
            });
            future.thenAccept(success -> user.sendMessage(tl("jailMessage")));

            try {
                sendToJail(user, user.getJail(), future);
            } catch (final Exception ex) {
                future.completeExceptionally(ex);
            }
        }
    }
}