using System;
using Sandbox;

[Perk( Rarity.Legendary, alwaysOfferDebug: false )]
public class PerkMiniPlayer : Perk
{
	private enum Mod { CameraDistance, Scale, MoveSpeed };

	// todo: fix giant nametag

	// todo: fix camera when combined with PerkFpsMode

	static PerkMiniPlayer()
	{
		Register<PerkMiniPlayer>(
			name: "Miniaturize",
			imagePath: "textures/icons/vector/mini_player.png",
			description: level => $"[+]-{(int)GetValue( level, Mod.Scale, true )}%[/+] size\n+{(int)GetValue( level, Mod.MoveSpeed, true )}% move speed\n-{(int)GetValue( level, Mod.CameraDistance, true )}% camera distance",
			upgradeDescription: level => $"[+]-{(int)GetValue( level - 1, Mod.Scale, true )}%→-{(int)GetValue( level, Mod.Scale, true )}%[/+] size\n+{(int)GetValue( level - 1, Mod.MoveSpeed, true )}%→{(int)GetValue( level, Mod.MoveSpeed, true )}% move speed\n-{(int)GetValue( level - 1, Mod.CameraDistance, true )}%→-{(int)GetValue( level, Mod.CameraDistance, true )}% camera distance"
		);
	}

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

	}

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

		// todo: scale floater text (based on player scale, or camera distance?)
		// scale health bar size too ?

		// todo: reduce player weight?

		Player.Modify( this, PlayerStat.CameraDistance, GetValue( Level, Mod.CameraDistance ), ModifierType.Mult );
		Player.Modify( this, PlayerStat.Scale, GetValue( Level, Mod.Scale ), ModifierType.Mult );
		Player.Modify( this, PlayerStat.MoveSpeedMultiplier, GetValue( Level, Mod.MoveSpeed ), ModifierType.Mult );

		Player.SetScale( Player.Stats[PlayerStat.Scale] );
	}

	private static float GetValue( int level, Mod mod, bool isPercent = false )
	{
		switch ( mod )
		{
			case Mod.CameraDistance:
			default:
				return isPercent
					? (level == 1 ? 30f : 50f)
					: 1f - (level == 1 ? 0.30f : 0.50f);
			case Mod.Scale:
				return isPercent
					? 22f * level
					: 1f - 0.22f * level;
			case Mod.MoveSpeed:
				return isPercent
					? 5f + 5f * level
					: 1f + (0.05f + 0.05f * level);
		}
	}

	public override void Remove( bool restart = false )
	{
		base.Remove( restart );

		Player.SetScale( Player.Stats[PlayerStat.Scale] );
	}
}