using Sandbox;
using System;
using System.Diagnostics;
using System.Numerics;
using System.Threading.Tasks;

public sealed class HealthSystem : Component, HealthSystem.IHealthEvent
{
	CameraComponent MainCamera;
	[Property] OrbitalCameraController OrbitalCameraController;
	[Property] public float SetHealth;
	[Property] float SetPoints = 500;
	[Property] SpriteRenderer HealthbarRenderer;
	IEnumerable<ModelRenderer> ModelRendererList;
	Color originalTint;
	Material dmgMaterial = Material.Load( "materials/damage-material.vmat" );

	List<GameObject> LootList;

	HighscoreManager HighscoreManager;

	public float CurrentHealth;

	TimeSince TimeSinceLastDamage;
	Random Random;

	public interface IHealthEvent : ISceneEvent<IHealthEvent>
	{
		void OnDeath();
	}

	void IHealthEvent.OnDeath() 
	{
		if ( GameObject.Tags.Has( "enemy" ) && !GameObject.Tags.Has( "prop" ))
		{
			if ( Random.Int( 1, 10 ) > 7 )
			{
				Log.Info( "Dropping loot" );
				LootList[Random.Int(0,2)].Clone( WorldPosition + Vector3.Up * 200 );
			}
			Log.Info( "Enemy " + GameObject.Name + " died." );
			GameObject.Destroy();
		}
	}

	protected override void OnStart()
	{
		HighscoreManager = Scene.Get<HighscoreManager>();
		MainCamera = Scene.GetComponentInChildren<CameraComponent>();
		ModelRendererList = GetComponentsInChildren<ModelRenderer>();
		originalTint = ModelRendererList.First<ModelRenderer>().Tint;

		CurrentHealth = SetHealth;

		// LootList wird nur für Gegner erstellt, da Spieler keine Lootdrops haben
		if ( !GameObject.Tags.Has( "enemy" ) ) return; 
		if ( GameObject.Tags.Has( "prop" ) ) return;

		Random = new Random();
		LootList = new List<GameObject>();
		LootList.Add( GameObject.GetPrefab( "prefabs/medikit.prefab" ) );
		LootList.Add( GameObject.GetPrefab( "prefabs/ammokit.prefab" ) );
		LootList.Add( GameObject.GetPrefab( "prefabs/pointkit.prefab" ) );

	}

	public void Damage( float amount, bool enableSound = true )
	{
		if ( CurrentHealth <= 0 ) return;

		CurrentHealth = (CurrentHealth - amount).Clamp( 0, SetHealth );
		
		ApplyDamageTint();
		// PauseGameFor( 1 );

		if ( HealthbarRenderer != null ) 
		{
			HealthbarRenderer.Size += new Vector2(-amount.Remap( 0, SetHealth, 0, 200 ), 0);
			// Log.Info( -amount.Remap( 0, SetHealth, 0, 200 ) );
			HealthbarRenderer.Color = HealthbarRenderer.Color.AdjustHue( -amount.Remap( 0, SetHealth, 0, 120 ) );
		} 

		if ( CurrentHealth <= 0 ) 
		{
			if (HealthbarRenderer != null) HealthbarRenderer.Color = HealthbarRenderer.Color.WithAlpha( 0 );
			// Log.Info( "Killed " + GameObject.Name );
			if (GameObject.Tags.Has("enemy")) HighscoreManager.IncreaseScore(SetPoints);
			IHealthEvent.PostToGameObject( this.GameObject, x => x.OnDeath() );
		}
		if ( GameObject.Tags.Has( "player" ) && enableSound == true )
		{
			Sound.Play( "sounds/metal-hit-cartoon.sound", Scene.FindAllWithTag("carbody").First<GameObject>().WorldPosition );
			OrbitalCameraController.ShakeCamera(Game.Random.Float(0.08f, 0.12f));
		}
	}

	[Button]
	async Task ApplyDamageTint() 
	{

		foreach ( var renderer in ModelRendererList )
		{
			renderer.Tint = Color.Average(new Color[] { Color.White, Color.Black, Color.Black} );
			renderer.MaterialOverride = dmgMaterial;
		}

		if ( GameObject.Tags.Has( "player" ) )
		{
			MainCamera.GetComponent<Vignette>().Color = Color.Red;
			// MainCamera.GetComponent<Vignette>().Intensity = 1;
		}

		TimeSinceLastDamage = 0;
		await Task.DelaySeconds( 0.03f );
		
		if (!this.IsValid) return;
		if (TimeSinceLastDamage < 0.029f) return;

		foreach ( var renderer in ModelRendererList )
		{
			renderer.Tint = originalTint;
			renderer.MaterialOverride = null;
		}

		if ( GameObject.Tags.Has( "player" ) )
		{
			MainCamera.GetComponent<Vignette>().Color = Color.Black;
			// MainCamera.GetComponent<Vignette>().Intensity = 0.6f;
		}

	}

	async Task PauseGameFor(int milliseconds) 
	{ 
		Scene.TimeScale = 0.1f;
		await Task.Delay( milliseconds );
		if (!this.IsValid) Scene.TimeScale = 1;

		Scene.TimeScale = 1;
	}

	[Button]
	void Damage500()
	{
		Damage(500);
	}

	[Button]
	void Heal500()
	{
		Damage( -500 );
	}


}