using System;
using Sandbox;

[Perk( Rarity.Legendary, locked: true, minUnlocksReq: 6, alwaysOfferDebug: false, IncludedCategories = new[] { PerkCategory.SelfDmg })]
public class PerkTimerDigitDamage : Perk
{
	private enum Mod { HpLost };

	private int _currDigit;


	static PerkTimerDigitDamage()
	{
		Register<PerkTimerDigitDamage>(
			name: "On The Clock",
			imagePath: "textures/icons/vector/digit_damage.png",
			description: level => $"Increase bullet dmg by\nthe 2nd-last timer digit\n-{(int)GetValue( level, Mod.HpLost )} hp every new minute",
			upgradeDescription: level => $"Increase bullet dmg by\nthe 2nd-last timer digit\n-{(int)GetValue( level - 1, Mod.HpLost )}→-{(int)GetValue( level, Mod.HpLost )} hp every new minute"
		);
	}

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

		ShouldUpdate = true;

		_currDigit = -1;
	}

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

	}

	public override void Update( float dt )
	{
		base.Update( dt );

		var manager = Manager.Instance;

		TimeSpan time = manager.HasSpawnedBoss
			? TimeSpan.FromSeconds( manager.ElapsedTime.Relative )
			: TimeSpan.FromSeconds( manager.BossSpawnTime ) - TimeSpan.FromSeconds( manager.ElapsedTime.Relative );

		string str = time.ToString( @"ss" );
		int dmgDigit;
		if ( int.TryParse( str.Substring( 0, 1 ), out dmgDigit ) )
		{
			if ( dmgDigit != _currDigit )
			{
				DisplayText = $"+{dmgDigit}";
				Player.Modify( this, PlayerStat.BulletDamage, (float)dmgDigit, ModifierType.Add );
				_currDigit = dmgDigit;

				HighlightColor = new Color( 0.4f, 0.4f, 1f );
				HighlightDuration = 0.25f;
				HighlightOpacity = 1.25f;
				Highlight();
			}

			DisplayCooldown = 1f - (dmgDigit / 6f);
			DisplayCooldownColor = dmgDigit == (manager.HasSpawnedBoss ? 5 : 0) ? new Color( 1f, 0.3f, 0.3f, Utils.Map( Utils.FastSin( RealTime.Now * 24f ), -1f, 1f, 0f, 2f ) ) : new Color( 1f, 0.5f, 0.5f, Utils.Map( dmgDigit, 1, 4, 0.35f, 0.8f ) );
		}

		// todo: check if this works correctly after boss spawns

		// todo: countdown sfx
	}

	private static float GetValue( int level, Mod mod, bool isPercent = false )
	{
		switch ( mod )
		{
			case Mod.HpLost:
			default:
				switch ( level )
				{
					case 1: default: return 50;
					case 2: return 20;
				}
		}
	}

	public override void OnSetMinute( int minute )
	{
		base.OnSetMinute( minute );

		if ( Player.IsDead )
			return;

		var damage = GetValue( Level, Mod.HpLost );
		if ( damage > 0f )
		{
			var hitPos = Player.Position2D;
			Player.Damage( damage, DamageType.Self, hitPos, Utils.GetRandomVector(), upwardAmount: 0f, force: 0f, ragdollForce: 1.5f, enemySource: null , enemyType: EnemyType.None );
			//Manager.Instance.PlaySfxNearbyRpc( "zombie.attack.player", Player.Position2D, pitch: Utils.Map( Level, 1, 3, 1.4f, 1.2f ) * Game.Random.Float( 0.95f, 1.05f ), volume: 0.8f, maxDist: 200f );
			
			// todo: needs louder sfx

			HighlightColor = new Color( 1f, 0.2f, 0.5f );
			HighlightDuration = 0.5f;
			HighlightOpacity = 5f;
			Highlight();
		}
	}
}