/*
 *  Copyright (C) 2012 maartenl
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */
package mmud.commands.items;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import mmud.commands.NormalCommand;
import mmud.database.entities.characters.Person;
import mmud.database.entities.characters.User;
import mmud.database.entities.game.DisplayInterface;
import mmud.database.entities.items.Item;
import mmud.exceptions.MudException;
import mmud.exceptions.PersonNotFoundException;
import mmud.rest.services.ItemBean;

/**
 * Give an item in your inventory to another character. Syntax: "give
 * <amount> <item> to <character>". It is also possible
 * to provide money to the other person, by means of "give <amount>
 * <copper, silver, gold> <coin|coins> to <character>".
 *
 * @see GetCommand
 * @author maartenl
 */
public class GiveCommand extends NormalCommand
{

    public GiveCommand(String aRegExpr)
    {
        super(aRegExpr);
    }

    @Override
    public DisplayInterface run(String command, User aUser) throws MudException
    {
        List<String> parsed = new ArrayList<>(Arrays.asList(parseCommand(command)));
        parsed.remove(0); // remove "give"
        int amount = 1;
        try
        {
            amount = Integer.parseInt(parsed.get(0));
            parsed.remove(0);
        } catch (NumberFormatException e)
        {// do nothing here, we assume we need to drop only one item.
        }
        if (amount <= 0)
        {
            aUser.writeMessage("That is an illegal amount.<br/>\n");
            return aUser.getRoom();
        }
        Person target = aUser.getRoom().retrievePerson(parsed.get(parsed.size() - 1));
        if (target == null)
        {
            // action to unknown
            throw new PersonNotFoundException("Cannot find " + parsed.get(parsed.size() - 1) + ".<BR>\r\n");
        }
        if (!target.canReceive())
        {
            aUser.writeMessage(target.getName() + " doesn't accept your stuff.<br/>\n");
            return aUser.getRoom();
        }
        parsed.remove(parsed.size() - 1);
        parsed.remove(parsed.size() - 1);
        if (giveMoney(parsed, amount, aUser, target))
        {
            return aUser.getRoom();
        }
        giveItems(aUser, parsed, amount, target);
        return aUser.getRoom();
    }

    private boolean giveMoney(List<String> parsed, int amount, User aUser, Person target) throws MudException
    {
        // check for money
        // "give [x] [gold,silver,copper] coin[s] to <person>"
        if (parsed.size() != 2 || (!"coin".equalsIgnoreCase(
                parsed.get(1)) && !"coins".equalsIgnoreCase(parsed.get(1))))
        {
            return false;
        }
        int newamount = amount;
        String currency = parsed.get(0).toLowerCase();
        switch (currency)
        {
            case "gold":
                newamount = newamount * 10;
            case "silver":
                newamount = newamount * 10;
            case "copper":
                // do nothing.
                break;
            default:
                // if currency not in [gold,silver,copper]
                return false;
        }
        // if amount screwy
        if (newamount < 0)
        {
            return false;
        }
        aUser.transferMoney(newamount, target);
        aUser.getRoom().sendMessage(aUser, target, "%SNAME give%VERB2 "
                + amount + " " + currency + " coin"
                + (amount == 1 ? "" : "s")
                + " to %TNAME.<br/>\r\n");
        return true;
    }

    private void giveItems(User aUser, List<String> parsed, int amount, Person target) throws MudException
    {
        // find the item on ourselves
        List<Item> itemsFound = aUser.findItems(parsed);
        if (itemsFound.isEmpty())
        {
            aUser.writeMessage("You don't have that.<br/>\n");
            return;
        }
        if (itemsFound.size() < amount)
        {
            aUser.writeMessage("You do not have that many items in your inventory.<br/>\r\n");
            return;
        }
        boolean given = false;
        ItemBean itemBean = getItemBean();
        for (Item item : itemsFound)
        {
            if (aUser.unused(item) && !item.isBound())
            {
                // item is not used.
                if (!itemBean.give(item, aUser, target))
                {
                    continue;
                }
                aUser.getRoom().sendMessage(aUser, target, "%SNAME give%VERB2 " + item.getDescription() + " to %TNAME.<br/>\r\n");
                given = true;
                amount--;
                if (amount == 0)
                {
                    return;
                }
            }
        }
        if (!given)
        {
            aUser.writeMessage("You did not give anything.<br/>");
        } else
        {
            aUser.writeMessage("You gave some of the items.<br/>\r\n");
        }
    }
}