using System;
using NaughtyAttributes;
using TMPro;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.SceneManagement;
using Random = UnityEngine.Random;

public class MainMenuManager : MonoBehaviour {
	public enum MenuMode {
		MainMenu,
		PauseMenu,
		Options,
	}
	
	[SerializeField] [Required]
	TMP_Text titleLabel;
	[SerializeField] string[] titleOptions;
	[SerializeField] [Required]
	Transform startMenuParent;
	[SerializeField] [Required]
	Transform pauseParent;
	[SerializeField] [Required]
	Transform optionsParent;
	[SerializeField] [Required]
	GameTimer gameTimer;
	[SerializeField] [Required]
	EventSystem eventSystem;
	MenuMode mode;
	MenuMode? preOptionsMode; 

	void Awake() => SetMenuMode(MenuMode.MainMenu);

	void Start() {
		if (titleOptions.Length == 0) {
			Debug.LogWarning("No titles listed.");
			return;
		}
		
		if (PlayerPrefs.HasKey(GameTimer.HIGH_SCORE_KEY) && PlayerPrefs.GetFloat(GameTimer.HIGH_SCORE_KEY) > 0f)
			titleLabel.text = titleOptions[Random.Range(0, titleOptions.Length)];
		else
			titleLabel.text = titleOptions[0];
	}

	public void SetMenuMode(MenuMode mode) {
		//meh
		titleLabel.gameObject.SetActive(mode == MenuMode.MainMenu);
		startMenuParent.gameObject.SetActive(mode == MenuMode.MainMenu);
		pauseParent.gameObject.SetActive(mode == MenuMode.PauseMenu);
		optionsParent.gameObject.SetActive(mode == MenuMode.Options);
		if (mode == MenuMode.Options) {
			if (this.mode != MenuMode.Options)
				preOptionsMode = this.mode;
		} else {
			preOptionsMode = null;
		}
		
		this.mode = mode;
		ResetMenuState();
	}

	public void SetOptions() => SetMenuMode(MenuMode.Options);

	public void ExitOptions() {
		if (preOptionsMode != null)
			SetMenuMode(preOptionsMode.Value);
	}

	public void ResetMenuState() {
		GameObject selected = mode switch {
			MenuMode.MainMenu => startMenuParent.GetChild(0).gameObject,
			MenuMode.PauseMenu => pauseParent.GetChild(0).gameObject,
			MenuMode.Options => optionsParent.GetChild(0).gameObject,
			_ => throw new ArgumentOutOfRangeException(nameof(mode), mode, null)
		};
		eventSystem.firstSelectedGameObject = selected;
		eventSystem.SetSelectedGameObject(selected);
	}
	
	public void GoToScene(int sceneNb) => SceneManager.LoadScene(sceneNb);

	public void QuitGame() => Application.Quit(0);

	public void ResetHighScore() => gameTimer.ResetHighScore();
}