package com.massivecraft.factions.util;

import com.massivecraft.factions.*;
import com.massivecraft.factions.struct.Role;
import org.bukkit.scheduler.BukkitRunnable;

import java.util.ArrayList;
import java.util.ListIterator;
import java.util.logging.Level;

public class AutoLeaveProcessTask extends BukkitRunnable {

	private transient boolean readyToGo = false;
	private transient boolean finished = false;
	private transient ListIterator<FPlayer> iterator;
	private transient double toleranceMillis;

	public AutoLeaveProcessTask() {
		ArrayList<FPlayer> fplayers = (ArrayList<FPlayer>) FPlayers.getInstance().getAllFPlayers();
		this.iterator = fplayers.listIterator();
		this.toleranceMillis = Conf.autoLeaveAfterDaysOfInactivity * 24 * 60 * 60 * 1000;
		this.readyToGo = true;
		this.finished = false;
	}

	public void run() {
		if (Conf.autoLeaveAfterDaysOfInactivity <= 0.0 || Conf.autoLeaveRoutineMaxMillisecondsPerTick <= 0.0) {
			this.stop();
			return;
		}

		if (!readyToGo) {
			return;
		}
		// this is set so it only does one iteration at a time, no matter how frequently the timer fires
		readyToGo = false;
		// and this is tracked to keep one iteration from dragging on too long and possibly choking the system if there are a very large number of players to go through
		long loopStartTime = System.currentTimeMillis();

		while (iterator.hasNext()) {
			long now = System.currentTimeMillis();

			// if this iteration has been running for maximum time, stop to take a breather until next tick
			if (now > loopStartTime + Conf.autoLeaveRoutineMaxMillisecondsPerTick) {
				readyToGo = true;
				return;
			}

			FPlayer fplayer = iterator.next();

			// Check if they should be exempt from this.
			if (!fplayer.willAutoLeave()) {
				SavageFactions.plugin.debug(Level.INFO, fplayer.getName() + " was going to be auto-removed but was set not to.");
				continue;
			}

			if (fplayer.isOffline() && now - fplayer.getLastLoginTime() > toleranceMillis) {
				if (Conf.logFactionLeave || Conf.logFactionKick) {
					SavageFactions.plugin.log("Player " + fplayer.getName() + " was auto-removed due to inactivity.");
				}

				// if player is faction admin, sort out the faction since he's going away
				if (fplayer.getRole() == Role.LEADER) {
					Faction faction = fplayer.getFaction();
					if (faction != null) {
						fplayer.getFaction().promoteNewLeader(true);
					}
				}

				fplayer.leave(false);
				iterator.remove();  // go ahead and remove this list's link to the FPlayer object
				if (Conf.autoLeaveDeleteFPlayerData) {
					fplayer.remove();
				}
			}
		}

		// looks like we've finished
		this.stop();
	}

	// we're done, shut down
	public void stop() {
		readyToGo = false;
		finished = true;

		this.cancel();
	}

	public boolean isFinished() {
		return finished;
	}
}