using System;
using System.Collections;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;

public class MainMenuHandler : MonoBehaviour
{
	[SerializeField] private Animator uiAnimator;
	[SerializeField] private string openUIAction;
	[SerializeField] private string closeUIAction;
	[SerializeField] private string gameStartAction;
	[SerializeField] private Transform uiMovingObject;
	[SerializeField] private DialogueScript startingScript;

	[Header("Scene Transition")]
	[SerializeField] private Image screenFade;
	[SerializeField] private float fadeSpeed;

	private void Start()
	{
		//uiAnimator.SetTrigger(gameStartAction);
		screenFade.gameObject.SetActive(false);
	}

	public void StartGame()
	{
		screenFade.gameObject.SetActive(true);
		screenFade.color = Color.clear;
		StartCoroutine(FadeScreen(2, startingScript));
		GameManager.instance.gameOver = false;
		GameManager.instance.canPause = true;
		GameManager.instance.isEndless = false;
	}

	public void StartEndless()
	{
		screenFade.gameObject.SetActive(true);
		screenFade.color = Color.clear;
		StartCoroutine(FadeScreen(1, startingScript));
		GameManager.instance.gameOver = false;
		GameManager.instance.canPause = true;
		GameManager.instance.isEndless = true;
	}

	public void QuitGame()
	{
		Application.Quit();
	}
	public void OpenUI(GameObject uiToOpen)
	{
		uiAnimator.SetTrigger(openUIAction);
		uiToOpen.transform.SetParent(uiMovingObject);
		uiToOpen.transform.position = uiMovingObject.position;
	}
	public void CloseUI(GameObject uiToClose)
	{
		uiAnimator.SetTrigger(closeUIAction);
	}

	private IEnumerator FadeScreen(int sceneToSwitchTo, DialogueScript scriptToShow)
	{
		float state = 0f;
		while (state < 1f)
		{
			state += Time.deltaTime * fadeSpeed;
			screenFade.color = Color.Lerp(Color.clear, Color.black, state);
			if (state >= 1)
			{
				LevelSwitcher.instance.SwitchLevel(sceneToSwitchTo, scriptToShow);
			}
			yield return null;
		}
	}
}