using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;

namespace UltraCombos
{
	public class DisplayConfig : MonoBehaviour
	{
		[Header( "Display" )]
		[SerializeField] private FullScreenMode mode = FullScreenMode.Windowed;
		[SerializeField] private int displayCount = 1;
		[SerializeField] private Vector2Int resolution = new Vector2Int( 1600, 900 );
		[SerializeField] private int fps = 60;

		[Header( "Misc" )]
		[Range( 0, 10 )]
		[SerializeField] private float autoHideCursor = 0;
		private float cursorStamp;
		private Vector2 cursorLastPosition;
		[SerializeField] private bool exitOnEsc = true;

		private float timestamp = -1;
		public float currentFps = 30.0f;

		[Header( "Event" )]
		public UnityEvent onQuit = new UnityEvent();

		private void Awake()
		{
			Application.targetFrameRate = fps;

#if UNITY_STANDALONE || UNITY_EDITOR
			if ( mode == FullScreenMode.ExclusiveFullScreen )
			{
				var displays = Display.displays;
				int num = Mathf.Min( Mathf.Max( displayCount, 1 ), displays.Length );
				for ( int i = 0; i < num; ++i )
				{
					displays[i].Activate();
				}
				Screen.SetResolution( Screen.width, Screen.height, mode );
			}
			else if ( mode == FullScreenMode.FullScreenWindow )
			{
				Screen.SetResolution( Screen.width, Screen.height, mode );
			}
			else
			{
				Screen.SetResolution( resolution.x, resolution.y, mode );
			}
#else
            Screen.sleepTimeout = SleepTimeout.NeverSleep;
#endif
		}

		private void Update()
		{
			if ( autoHideCursor > 0 )
			{
#if ENABLE_INPUT_SYSTEM
				var pos = UnityEngine.InputSystem.Mouse.current.position.ReadValue();
#else
				var pos = (Vector2)Input.mousePosition;
#endif
				var bias = pos - cursorLastPosition;
				if ( bias.magnitude > 1 )
				{
					cursorLastPosition = pos;
					cursorStamp = Time.time;
				}

				Cursor.visible = Time.time - cursorStamp < autoHideCursor;
			}

			if ( Time.time - timestamp > 0 )
			{
				currentFps = Mathf.Lerp( currentFps, 1.0f / (Time.time - timestamp), Time.deltaTime );
				timestamp = Time.time;
			}

			if ( exitOnEsc )
			{
#if ENABLE_INPUT_SYSTEM
				if ( UnityEngine.InputSystem.Keyboard.current.escapeKey.isPressed )
#else
				if ( Input.GetKey( KeyCode.Escape ) )
#endif
				{
					onQuit.Invoke();
					Application.Quit();
				}
			}
		}
	}

}