status/FireStackStatus.cs
using System;
using System.Collections.Generic;
using System.Linq;
using Sandbox;

[Status(7, 0, 1f, 0, false, typeof( FireIgniteStatus ), typeof( DashFireStatus ) )]
public class FireStackStatus : Status
{
	public FireStackStatus()
    {
		Title = "Pyromaniac";
		IconPath = "textures/icons/fire_stack.png";
	}

	public override void Init(Player player)
	{
		base.Init(player);
	}

	public override void Refresh()
    {
		Description = GetDescription(Level);

		Player.Modify(this, PlayerStat.MaxFireStacks, GetNumStacks(Level), ModifierType.Add);
		Player.Modify( this, PlayerStat.FireLifetime, GetMultForLevel( Level ), ModifierType.Mult );
	}

	public override string GetDescription(int newLevel)
	{
		return string.Format("Fire can stack an additional {0} time but lasts {1}% shorter", GetNumStacks(Level), GetPercentForLevel( Level ) );
	}

	public override string GetUpgradeDescription(int newLevel)
    {
		return newLevel > 1 ? string.Format( "Fire can stack an additional {0}→{1} times but lasts {2}%→{3}% shorter", GetNumStacks(newLevel - 1), GetNumStacks(newLevel), GetPercentForLevel( newLevel - 1 ), GetPercentForLevel( newLevel ) ) : GetDescription(newLevel);
	}

	public float GetNumStacks(int level)
	{
		return level;
	}

	public float GetMultForLevel( int level )
	{
		return 1 - (0.23f + 0.07f * level);
	}

	public float GetPercentForLevel( int level )
	{
		return 23 + 7 * level;
	}
}