using System;
using Sandbox;

[Perk( Rarity.Uncommon, alwaysOfferDebug: false )]
public class PerkMaxHealth : Perk
{
	private enum Mod { MaxHp };

	static PerkMaxHealth()
	{
		Register<PerkMaxHealth>(
			name: "Healthy Diet",
			imagePath: "textures/icons/vector/max_health.png",
			description: level => $"+{(int)GetValue( level, Mod.MaxHp, true )}% max hp",
			upgradeDescription: level => $"+{(int)GetValue( level - 1, Mod.MaxHp, true )}%→{(int)GetValue( level, Mod.MaxHp, true )}% max hp"
		);
	}

	public override void Start()
	{
		base.Start();
	}

	public override void Refresh()
	{
		base.Refresh();

		// todo: how does this interact with things that change max hp by a flat amount? should this instead add a flat amount based on current hp, instead of multiplying each time max hp stat is refreshed?
		Player.Modify( this, PlayerStat.MaxHp, GetValue( Level, Mod.MaxHp ), ModifierType.Mult );
	}

	private static float GetValue( int level, Mod mod, bool isPercent = false )
	{
		switch ( mod )
		{
			case Mod.MaxHp:
			default:
				return isPercent
					? (5f + 15f * level)
					: 1f + (0.05f + 0.15f * level);
		}
	}
}