using System;
using Sandbox;

[Perk( Rarity.Rare, alwaysOfferDebug: false, IncludedCategories = new[] { PerkCategory.Punch })]
public class PerkPunch : Perk
{
	private enum Mod { DamagePercent, AttackSpeed };

	public const float PUNCH_LIFETIME = 0.04f;
	public const float PUNCH_SPEED = 1320f;


	public override float ImportanceMultiplier => 1.4f;

	static PerkPunch()
	{
		Register<PerkPunch>(
			name: "Puncher",
			imagePath: "textures/icons/vector/punch.png",
			description: level => $"You no longer shoot bullets\nPunch for {(int)GetValue( level, Mod.DamagePercent, true )}% bullet dmg\n-{GetValue( level, Mod.AttackSpeed, true )}% attack speed",
			upgradeDescription: level => $"You no longer shoot bullets\nPunch for {(int)GetValue( level - 1, Mod.DamagePercent, true )}%→{(int)GetValue( level, Mod.DamagePercent, true )}% bullet dmg\n-{GetValue( level - 1, Mod.AttackSpeed, true )}%→-{GetValue( level, Mod.AttackSpeed, true )}% attack speed"
		);
	}

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

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

		// todo: add to stats screen - Punch Damage
		Player.Modify( this, PlayerStat.PunchDamagePercent, GetValue( Level, Mod.DamagePercent ), ModifierType.Add );
		Player.Modify( this, PlayerStat.PunchBullets, 1f, ModifierType.Add );
		Player.Modify( this, PlayerStat.AttackSpeed, GetValue( Level, Mod.AttackSpeed ), ModifierType.Mult );

		Player.SetGunVisible( false );
	}

	private static float GetValue( int level, Mod mod, bool isPercent = false )
	{
		switch ( mod )
		{
			case Mod.DamagePercent:
			default:
				return isPercent
					? 150f + 20f * level + (level == 5 ? 10f : 0f)
					: 1.50f + 0.20f * level + (level == 5 ? 0.10f : 0f);
			case Mod.AttackSpeed:
				return isPercent
					? 30f + 5f * level
					: 1f - (0.30f + 0.05f * level);
		}
	}

	public override void Remove( bool restart = false )
	{
		Player.SetGunVisible( true );
	}
}