/*
    GriefPrevention Server Plugin for Minecraft
    Copyright (C) 2012 Ryan Hamshire

    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 me.ryanhamshire.GriefPrevention;

import org.bukkit.Location;
import org.bukkit.entity.Player;

//FEATURE: give players claim blocks for playing, as long as they're not away from their computer

//runs every 5 minutes in the main thread, grants blocks per hour / 12 to each online player who appears to be actively playing
class DeliverClaimBlocksTask implements Runnable 
{	
    private Player player;
    
    public DeliverClaimBlocksTask(Player player)
    {
        this.player = player;
    }
    
	@Override
	public void run()
	{
		//if no player specified, this task will create a player-specific task for each online player, scheduled one tick apart
	    if(this.player == null)
		{
	        Player [] players = GriefPrevention.instance.getServer().getOnlinePlayers();
	        
	        long i = 0;
	        for(Player onlinePlayer : players)
	        {
	            DeliverClaimBlocksTask newTask = new DeliverClaimBlocksTask(onlinePlayer);
	            GriefPrevention.instance.getServer().getScheduler().scheduleSyncDelayedTask(GriefPrevention.instance, newTask, i++);
	        }
		}
	    
	    //otherwise, deliver claim blocks to the specified player
	    else
	    {
	        int accruedBlocks = GriefPrevention.instance.config_claims_blocksAccruedPerHour / 12;
	        if(accruedBlocks < 0) accruedBlocks = 1;
	        
	        DataStore dataStore = GriefPrevention.instance.dataStore;
            PlayerData playerData = dataStore.getPlayerData(player.getUniqueId());
            
            Location lastLocation = playerData.lastAfkCheckLocation;
            try  //distance squared will throw an exception if the player has changed worlds
            {
                //if he's not in a vehicle and has moved at least three blocks since the last check
                //and he's not being pushed around by fluids
                if(!player.isInsideVehicle() && 
                   (lastLocation == null || lastLocation.distanceSquared(player.getLocation()) >= 9) &&
                   !player.getLocation().getBlock().isLiquid())
                {                   
                    //if player is over accrued limit, accrued limit was probably reduced in config file AFTER he accrued
                    //in that case, leave his blocks where they are
                    if(playerData.getAccruedClaimBlocks() > GriefPrevention.instance.config_claims_maxAccruedBlocks) return;
                    
                    //add blocks
                    playerData.setAccruedClaimBlocks(playerData.getAccruedClaimBlocks() + accruedBlocks);
                    
                    //respect limits
                    if(playerData.getAccruedClaimBlocks() > GriefPrevention.instance.config_claims_maxAccruedBlocks)
                    {
                        playerData.setAccruedClaimBlocks(GriefPrevention.instance.config_claims_maxAccruedBlocks); 
                    }
                    
                    //intentionally NOT saving data here to reduce overall secondary storage access frequency
                    //many other operations will cause this players data to save, including his eventual logout
                    //dataStore.savePlayerData(player.getName(), playerData);
                }
            }
            catch(IllegalArgumentException e)  //can't measure distance when to/from are different worlds
            {
                
            }
            catch(Exception e)
            {
                GriefPrevention.AddLogEntry("Problem delivering claim blocks to player " + player.getName() + ":");
                e.printStackTrace();
            }
            
            //remember current location for next time
            playerData.lastAfkCheckLocation = player.getLocation();
	    }
	}
}