////////////////////////////////////////////////////////////////////////////////////////////////////
// PlotSquared - A plot manager and world generator for the Bukkit API                             /
// Copyright (c) 2014 IntellectualSites/IntellectualCrafters                                       /
//                                                                                                 /
// This program is free software; you can redistribute it and/or modify                            /
// it under the terms of the GNU General Public License as published by                            /
// the Free Software Foundation; either version 3 of the License, or                               /
// (at your option) any later version.                                                             /
//                                                                                                 /
// This program is distributed in the hope that it will be useful,                                 /
// but WITHOUT ANY WARRANTY; without even the implied warranty of                                  /
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                                   /
// GNU General Public License for more details.                                                    /
//                                                                                                 /
// You should have received a copy of the GNU General Public License                               /
// along with this program; if not, write to the Free Software Foundation,                         /
// Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA                               /
//                                                                                                 /
// You can contact us via: support@intellectualsites.com                                           /
////////////////////////////////////////////////////////////////////////////////////////////////////
package com.intellectualcrafters.plot.object;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map.Entry;
import java.util.UUID;

import com.intellectualcrafters.plot.PS;
import com.intellectualcrafters.plot.database.DBFunc;
import com.intellectualcrafters.plot.flag.Flag;
import com.intellectualcrafters.plot.util.ChunkManager;
import com.intellectualcrafters.plot.util.MainUtil;

/**
 * The plot class
 *
 * @author Citymonstret
 * @author Empire92
 */
@SuppressWarnings("javadoc")
public class Plot implements Cloneable {
    /**
     * plot ID
     */
    public final PlotId id;
    /**
     * plot world
     */
    public final String world;
    /**
     * plot owner
     */
    public UUID owner;
    /**
     * List of trusted (with plot permissions)
     */
    public HashSet<UUID> trusted;
    /**
     * List of members users (with plot permissions)
     */
    public HashSet<UUID> members;
    /**
     * List of denied players
     */
    public HashSet<UUID> denied;
    /**
     * External settings class<br>
     *  - Please favor the methods over direct access to this class<br>
     *  - The methods are more likely to be left unchanged from version changes<br>
     */
    public PlotSettings settings;
    /**
     * Has the plot changed since the last save cycle?
     */
    public boolean hasChanged = false;
    public boolean countsTowardsMax = true;
    
    /**
     * If this plot is temporary i.e. not stored in the DB
     */
    public final boolean temp;

    /**
     * Constructor for a new plot
     * 
     * @param world
     * @param id
     * @param owner
     */
    public Plot(String world, PlotId id, UUID owner) {
        this.world = world;
        this.id = id;
        this.owner = owner;
        this.settings = new PlotSettings(this);
        this.trusted = new HashSet<>();
        this.members = new HashSet<>();
        this.denied = new HashSet<>();
        this.temp = false;
    }
    
    /**
     * Constructor for a temporary plot
     * 
     * @param world
     * @param id
     * @param owner
     * @param temp
     */
    public Plot(String world, PlotId id, UUID owner, boolean temp) {
        this.world = world;
        this.id = id;
        this.owner = owner;
        this.settings = new PlotSettings(this);
        this.trusted = new HashSet<>();
        this.members = new HashSet<>();
        this.denied = new HashSet<>();
        this.temp = temp;
    }
    
    /**
     * Constructor for a saved plots
     *
     * @param id
     * @param owner
     * @param trusted
     * @param denied
     * @param merged
     */
    public Plot(final PlotId id, final UUID owner, final HashSet<UUID> trusted, final HashSet<UUID> members, final HashSet<UUID> denied, final String alias, final BlockLoc position, final Collection<Flag> flags, final String world, final boolean[] merged) {
        this.id = id;
        this.settings = new PlotSettings(this);
        this.owner = owner;
        this.members = members;
        this.trusted = trusted;
        this.denied = denied;
        this.settings.setAlias(alias);
        this.settings.setPosition(position);
        this.settings.setMerged(merged);
        if (flags != null) {
            for (Flag flag : flags) {
                this.settings.flags.put(flag.getKey(), flag);
            }
        }
        this.world = world;
        this.temp = false;
    }

    /**
     * Check if the plot has a set owner
     *
     * @return false if there is no owner
     */
    public boolean hasOwner() {
        return this.owner != null;
    }
    
    public boolean isOwner(UUID uuid) {
        return PlotHandler.isOwner(this, uuid);
    }
    
    /**
     * Get a list of owner UUIDs for a plot (supports multi-owner mega-plots)
     * @return
     */
    public HashSet<UUID> getOwners() {
        return PlotHandler.getOwners(this);
    }

    /**
     * Check if the player is either the owner or on the trusted list
     *
     * @param uuid
     *
     * @return true if the player is added as a helper or is the owner
     */
    public boolean isAdded(final UUID uuid) {
        return PlotHandler.isAdded(this, uuid);
    }

    /**
     * Should the player be allowed to enter?
     *
     * @param uuid
     *
     * @return boolean false if the player is allowed to enter
     */
    public boolean isDenied(final UUID uuid) {
        return (this.denied != null) && ((this.denied.contains(DBFunc.everyone) && !this.isAdded(uuid)) || (!this.isAdded(uuid) && this.denied.contains(uuid)));
    }

    /**
     * Get the plot ID
     */
    public PlotId getId() {
        return this.id;
    }

    /**
     * Get a clone of the plot
     *
     * @return Plot
     */
    @Override
    public Object clone() throws CloneNotSupportedException {
        final Plot p = (Plot) super.clone();
        if (!p.equals(this) || (p != this)) {
            return new Plot(this.id, this.owner, this.trusted, this.members, this.denied, this.settings.getAlias(), this.settings.getPosition(), this.settings.flags.values(), this.world, this.settings.getMerged());
        }
        return p;
    }

    /**
     * Deny someone (use DBFunc.addDenied() as well)
     *
     * @param uuid
     */
    public void addDenied(final UUID uuid) {
        if (this.denied.add(uuid)) DBFunc.setDenied(this, uuid);
    }

    /**
     * Add someone as a helper (use DBFunc as well)
     *
     * @param uuid
     */
    public void addTrusted(final UUID uuid) {
        if (this.trusted.add(uuid)) DBFunc.setTrusted(this, uuid);
    }

    /**
     * Add someone as a trusted user (use DBFunc as well)
     *
     * @param uuid
     */
    public void addMember(final UUID uuid) {
        if (this.members.add(uuid)) DBFunc.setMember(this, uuid);
    }
    
    /**
     * Set the plot owner
     * @param owner
     */
    public void setOwner(final UUID owner) {
        if (!this.owner.equals(owner)) {
            this.owner = owner;
            DBFunc.setOwner(this, owner);
        }
    }
    
    /**
     * Clear a plot
     * @see MainUtil#clear(Plot, boolean, Runnable)
     * @see MainUtil#clearAsPlayer(Plot, boolean, Runnable)
     * @see #delete() to clear and delete a plot
     * @param whenDone A runnable to execute when clearing finishes, or null
     */
    public void clear(Runnable whenDone) {
        MainUtil.clear(this, false, whenDone);
    }
    
    /**
     * Delete a plot
     * @see PS#removePlot(String, PlotId, boolean)
     * @see #clear(Runnable) to simply clear a plot
     */
    public void delete() {
        MainUtil.removeSign(this);
        MainUtil.clear(this, true, new Runnable() {
            @Override
            public void run() {
                if (PS.get().removePlot(world, id, true)) {
                    DBFunc.delete(Plot.this);
                }
            }
        });
    }
    
    public void unclaim() {
        if (PS.get().removePlot(world, id, true)) {
            DBFunc.delete(Plot.this);
        }
    }
    
    /**
     * Unlink a plot and remove the roads
     * @see MainUtil#unlinkPlot(Plot)
     * @return true if plot was linked
     */
    public boolean unlink() {
        return MainUtil.unlinkPlot(this);
    }
    
    /**
     * Return the home location for the plot
     * @see MainUtil#getPlotHome(Plot)
     * @return Home location
     */
    public Location getHome() {
        return MainUtil.getPlotHome(this);
    }
    
    /**
     * Get the ratings associated with a plot<br>
     *  - The rating object may contain multiple categories
     * @return Map of user who rated to the rating
     */
    public HashMap<UUID, Rating> getRatings() {
        HashMap<UUID, Rating> map = new HashMap<UUID, Rating>();
        for (Entry<UUID, Integer> entry : settings.ratings.entrySet()) {
            map.put(entry.getKey(), new Rating(entry.getValue()));
        }
        return map;
    }
    
    /**
     * Set the home location
     * @param loc
     */
    public void setHome(BlockLoc loc) {
        BlockLoc pos = this.settings.getPosition();
        if ((pos == null && loc == null) || (pos != null && pos.equals(loc))) {
            return;
        }
        this.settings.setPosition(loc);
        if (this.settings.getPosition() == null) {
            DBFunc.setPosition(this, "");
        }
        else {
            DBFunc.setPosition(this, this.settings.getPosition().toString());
        }
    }
    
    /**
     * Set the plot alias
     * @param alias
     */
    public void setAlias(String alias) {
        String name = this.settings.getAlias();
        if (alias == null) {
            alias = "";
        }
        if (name.equals(alias)) {
            return;
        }
        this.settings.setAlias(alias);
        DBFunc.setAlias(this, alias);
    }
    
    /**
     * Resend all chunks inside the plot to nearby players<br>
     * This should not need to be called
     * @see MainUtil#update(Plot) 
     */
    public void refreshChunks() {
        MainUtil.update(this);
    }
    
    /**
     * Remove the plot sign if it is set
     */
    public void removeSign() {
        MainUtil.removeSign(this);
    }
    
    /**
     * Set the plot sign if plot signs are enabled
     */
    public void setSign() {
        MainUtil.setSign(this);
    }
    
    /**
     * Register a plot and create it in the database<br>
     *  - The plot will not be created if the owner is null<br>
     *  - This will not save any trusted etc in the DB, those should be set after plot creation
     * @return true if plot was created successfully
     */
    public boolean create() {
        return MainUtil.createPlot(owner, this);
    }
    
    /**
     * Auto merge the plot with any adjacent plots of the same owner
     * @see MainUtil#autoMerge(Plot, UUID) to specify the owner
     */
    public void autoMerge() {
        MainUtil.autoMerge(this, owner);
    }
    
    /**
     * Set the plot biome
     */
    public void setBiome(String biome) {
        MainUtil.setBiome(this, biome);
    }
    
    /**
     * Return the top location for the plot
     * @return
     */
    public Location getTop() {
        return MainUtil.getPlotTopLoc(world, id);
    }
    
    /**
     * Return the bottom location for the plot
     * @return
     */
    public Location getBottom() {
        return MainUtil.getPlotBottomLoc(world, id);
    }
    
    /**
     * Get the top plot, or this plot if it is not part of a mega plot
     * @return The bottom plot
     */
    public Plot getTopPlot() {
        return MainUtil.getTopPlot(this);
    }
    
    /**
     * Get the bottom plot, or this plot if it is not part of a mega plot
     * @return The bottom plot
     */
    public Plot getBottomPlot() {
        return MainUtil.getBottomPlot(this);
    }
    
    /**
     * Swap the plot contents and settings with another location<br>
     *  - The destination must correspond to a valid plot of equal dimensions
     * @see ChunkManager#swap(String, bot1, top1, bot2, top2) to swap terrain
     * @see MainUtil#getPlotSelectionIds(PlotId, PlotId) to get the plots inside a selection
     * @see MainUtil#swapData(String, PlotId, PlotId, Runnable) to swap plot settings
     * @param other The other plot id to swap with
     * @param whenDone A task to run when finished, or null
     * @see MainUtil#swapData(String, PlotId, PlotId, Runnable)
     * @return boolean if swap was successful
     */
    public boolean swap(PlotId destination, Runnable whenDone) {
        return MainUtil.swap(world, id, destination, whenDone);
    }
    
    /**
     * Move the plot to an empty location<br>
     *  - The location must be empty
     * @param destination Where to move the plot
     * @param whenDone A task to run when done, or null
     * @return if the move was successful
     */
    public boolean move(Plot destination, Runnable whenDone) {
        return MainUtil.move(this, destination, whenDone);
    }
    
    /**
     * Copy the plot contents and settings to another location<br>
     *  - The destination must correspond to an empty location
     * @param destination The location to copy to
     * @param whenDone The task to run when done
     * @return If the copy was successful
     */
    public boolean copy(PlotId destination, Runnable whenDone) {
        return MainUtil.copy(world, id, destination, whenDone);
    }
    
    /**
     * Get plot display name
     *
     * @return alias if set, else id
     */
    @Override
    public String toString() {
        if (this.settings.getAlias().length() > 1) {
            return this.settings.getAlias();
        }
        return this.world + ";" + this.getId().x + ";" + this.getId().y;
    }

    /**
     * Remove a denied player (use DBFunc as well)
     *
     * @param uuid
     */
    public boolean removeDenied(final UUID uuid) {
        if (this.denied.remove(uuid)) {
            DBFunc.removeDenied(this, uuid);
            return true;
        }
        return false;
    }

    /**
     * Remove a helper (use DBFunc as well)
     *
     * @param uuid
     */
    public boolean removeTrusted(final UUID uuid) {
        if (this.trusted.remove(uuid)) {
            DBFunc.removeTrusted(this, uuid);
            return true;
        }
        return false;
    }

    /**
     * Remove a trusted user (use DBFunc as well)
     *
     * @param uuid
     */
    public boolean removeMember(final UUID uuid) {
        if (this.members.remove(uuid)) {
            DBFunc.removeMember(this, uuid);
            return true;
        }
        return false;
    }
    
    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final Plot other = (Plot) obj;
        return ((this.id.x.equals(other.id.x)) && (this.id.y.equals(other.id.y)) && (this.world.equals(other.world)));
    }

    
    /**
     * Get the plot hashcode
     *
     * @return integer. You can easily make this a character array <br> xI = c[0] x = c[1 -&gt; xI...] yI = c[xI ... + 1] y
     * = c[xI ... + 2 -&gt; yI ...]
     */
    @Override
    public int hashCode() {
        return this.id.hashCode();
    }
}