using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static Manager;

public class EnemySpikeElite : Thing
{
	public TimeSince SpawnTime { get; private set; }

	public Enemy Shooter { get; set; }
	public float Damage { get; set; }
	public float Lifetime { get; set; }
	public Sprite2D BgSprite { get; set; }
	//public SpikeBackground Background { get; set; }

	public List<Thing> _hitThings = new List<Thing>();

	private bool _playedSfx;

	public Thing Target { get; set; }
	private float _speedMult;

	public bool IsCharmed { get; private set; }

	protected override void OnAwake()
	{
		base.OnAwake();

		//OffsetY = -0.24f;

		Radius = 0.43f;

		Scale = 2.1f;
		//Sprite.Size = new Vector2( 1f, 1f ) * Scale;
		Sprite.SpriteFlags = Game.Random.Int( 0, 1 ) == 0 ? SpriteFlags.HorizontalFlip : SpriteFlags.None;

		Sprite.LocalScale = new Vector3( 1f ) * Scale * Globals.SPRITE_SCALE;

		Lifetime = 1.9f;
		Damage = 24f;
		SpawnTime = 0f;

		// spawn background
		var bgObj = Manager.Instance.EnemySpikeBgPrefab.Clone( WorldPosition );
		bgObj.SetParent( GameObject );
		//bgObj.Transform.LocalPosition = new Vector3( 0f, OffsetY, Globals.SHADOW_DEPTH_OFFSET );
		bgObj.LocalPosition = new Vector3( 0f, 0f, Globals.SHADOW_DEPTH_OFFSET );
		bgObj.NetworkMode = NetworkMode.Never;

		BgSprite = bgObj.Components.Get<Sprite2D>();
		BgSprite.SpriteFlags = Game.Random.Int( 0, 1 ) == 0 ? SpriteFlags.HorizontalFlip : SpriteFlags.None;
		BgSprite.LocalScale = new Vector3( 1f ) * 2.2f * Globals.SPRITE_SCALE;
		BgSprite.LocalRotation = new Angles( 0f, -90f, 0f );

		if ( IsProxy )
			return;

		CollideWith.Add( typeof( Player ) );
		CollideWith.Add( typeof( Enemy ) );

		_speedMult = Game.Random.Float( 0.3f, 2.4f );
	}

	protected override void OnUpdate()
	{
		base.OnUpdate();

		//Gizmo.Draw.Color = SpawnTime < 1.25f || SpawnTime > 1.6f ? Color.White.WithAlpha( 0.05f ) : Color.Red.WithAlpha( 0.1f );
		//Gizmo.Draw.LineSphere( (Vector3)Position2D, Radius );

		float dt = Time.Delta;

		if ( Manager.Instance.Difficulty >= 1 && Target != null )
		{
			var speed = Utils.Map( SpawnTime, 0f, 0.7f, 3f, 0f, EasingType.SineIn ) * _speedMult;

			if(Target.IsValid())
				Velocity += ((Target.Position2D + Target.Velocity * Game.Random.Float( 0f, 2.5f )) - Position2D).Normal * speed * dt;

			Position2D += Velocity * dt;

			Position2D = Manager.Instance.ClampToBounds( Position2D );

			var deceleration = Utils.Map( SpawnTime, 0.3f, 0.8f, 0.75f, 5f, EasingType.SineIn );
			Velocity *= (1f - dt * deceleration);
		}

		WorldPosition = WorldPosition.WithZ( Globals.GetZPos( Position2D.y ) );

		if ( SpawnTime > Lifetime )
		{
			Remove();
			return;
		}

		if ( !Manager.Instance.ShouldUpdateThings )
			return;

		if ( !_playedSfx && SpawnTime > 1.15f )
		{
			Manager.Instance.PlaySfxNearby( "spike.thrust", Position2D, pitch: Game.Random.Float( 1.15f, 1.3f ), volume: 1.25f, maxDist: 6f );
			_playedSfx = true;
		}

		for ( int dx = -1; dx <= 1; dx++ )
		{
			for ( int dy = -1; dy <= 1; dy++ )
			{
				Manager.Instance.HandleThingCollisionForGridSquare( this, new GridSquare( GridPos.x + dx, GridPos.y + dy ), dt );

				if ( IsRemoved )
					return;
			}
		}
	}

	public override void Colliding( Thing other, float percent, float dt )
	{
		base.Colliding( other, percent, dt );

		if ( SpawnTime < 1.25f || SpawnTime > 1.6f )
			return;

		if ( other is Player player && !player.IsDead )
		{
			if ( _hitThings.Contains( player ) )
				return;

			float dmg = player.CheckDamageAmount( Damage, DamageType.Ranged );

			if ( !player.IsInvulnerable && !player.IsTimePausedForChoosing )
			{
				Manager.Instance.PlaySfxNearby( "spike.stab", player.Position2D, pitch: Game.Random.Float( 0.85f, 0.9f ), volume: 1.6f, maxDist: 6f );
				player.Damage( dmg );
				player.AddVelocity( (player.Position2D - Position2D).Normal * Game.Random.Float(2f, 4f));
			}

			_hitThings.Add( player );
		}
		else if ( other is Enemy enemy && (IsCharmed != enemy.IsCharmed) )
		{
			if ( _hitThings.Contains( enemy ) )
				return;

			enemy.Damage( Damage, null, addVel: (enemy.Position2D - Position2D).Normal * Game.Random.Float( 1f, 2f ), addTempWeight: 0f, isCrit: false, DamageType.Ranged );

			if ( Shooter.IsValid() )
				enemy.Target = Shooter;

			Manager.Instance.PlaySfxNearby( "spike.stab", enemy.Position2D, pitch: Game.Random.Float( 1.15f, 1.25f ), volume: 1.2f, maxDist: 4.5f );

			_hitThings.Add( enemy );
		}
	}

	public void BecomeCharmed( bool elite = false )
	{
		IsCharmed = true;
		Sprite.Tint = new Color( 1f, 0f, 1f, 0.8f );
		Sprite.FlashTint = new Color( 1f, 0f, 1f, 0.9f );

		BgSprite.Tint = new Color( 1f, 0f, 1f, 0.6f );

		Damage = 30f * Manager.Instance.Player.Stats[PlayerStat.CharmedEnemyDmgDealtMultiplier];
	}
}