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

public class MainMenu : MonoBehaviour
{
    public float CustomTimeScale = 0.25f;
    public GameObject Logo;
    public GameObject LogoShadow;
    public GameObject MenuOptions;
    public float QuickFadeStep = 0.0025f;
    public float SlowFadeStep = 0.0001f;
    public float LogoFadeInDelay = 8.0f;
    public float LogoShadowFadeInDelay = 6.0f;
    public float MenuFadeInDelay = 12.0f;
    private bool logoFadingIn;
    private bool logoShadowFadingIn;
    private bool menuFadingIn;

    // Start is called before the first frame update
    void Start()
    {
        Time.timeScale = CustomTimeScale;
        
        var logoImage = Logo.GetComponent<Image>();
        var logoShadowImage = LogoShadow.GetComponent<Image>();
        logoImage.color = new Color(0.0f, 0.0f, 0.0f, 0.0f);
        logoShadowImage.color = new Color(0.0f, 0.0f, 0.0f, 0.0f);
        MenuOptions.SetActive(false);

        StartCoroutine(startLogoFadeTimer());
        StartCoroutine(startLogoShadowFadeTimer());
        StartCoroutine(startMenuFadeTimer());
    }
    
    IEnumerator startLogoFadeTimer()
    {
        yield return new WaitForSecondsRealtime(LogoFadeInDelay);
        logoFadingIn = true;
    }
    IEnumerator startLogoShadowFadeTimer()
    {
        yield return new WaitForSecondsRealtime(LogoShadowFadeInDelay);
        logoShadowFadingIn = true;
    }
    IEnumerator startMenuFadeTimer()
    {
        yield return new WaitForSecondsRealtime(MenuFadeInDelay);
        menuFadingIn = true;
    }

    public void NewGame()
    {
        SceneManager.LoadScene("New Game Demo Scene");
        // SceneManager.LoadScene("New Game");
    }

    public void LoadGame()
    {
        SceneManager.LoadScene("Load Game");
    }

    public void OpenSettings()
    {
        SceneManager.LoadScene("Settings Menu");
    }

    public void QuitGame()
    {
        Application.Quit();
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.Space) || Input.GetButton("Submit"))
        {
            var logoImage = Logo.GetComponent<Image>();
            var logoShadowImage = LogoShadow.GetComponent<Image>();
            MenuOptions.SetActive(true);
            logoShadowImage.color = new Color(0.1603774f, 0.08714567f, 0.0f, 0.67f);
            logoImage.color = new Color(1.0f, 1.0f, 1.0f, 1.0f);
            logoFadingIn = false;
            logoShadowFadingIn = false;
            menuFadingIn = false;
        }
        if (logoShadowFadingIn)
        {    
            var logoShadowImage = LogoShadow.GetComponent<Image>();
            if (logoShadowImage.color.a < 0.67f)
            {
                logoShadowImage.color = new Color(0.1603774f, 0.08714567f, 0.0f, logoShadowImage.color.a + QuickFadeStep);
            }
        }
        if (logoFadingIn)
        {    
            var logoImage = Logo.GetComponent<Image>();
            // if (logoShadowImage.color.a < 0.3607843f)
            if (logoImage.color.a < 1.0f)
            {
                logoImage.color = new Color(1.0f, 1.0f, 1.0f, logoImage.color.a + SlowFadeStep);
                // logoShadowImage.color = new Color(0.8204432f, 0.9209584f, 0.9716981f, logoShadowImage.color.a + SlowFadeStep);
            }
        }
        if (menuFadingIn)
        {    
            MenuOptions.SetActive(true);
            //something is weird with this... don't fade the menu in or out rn
            return;
            var menuOptionImages = MenuOptions.GetComponentsInChildren<Image>();
            var menuOptionTextFields = MenuOptions.GetComponentsInChildren<Text>();
            for (var i = 0; i < menuOptionImages.Length; i++)
            {
                if (menuOptionImages[i].color.a < 0.67f)
                {
                    menuOptionImages[i].color = new Color(0.1603774f, 0.08714567f, 0.0f, menuOptionImages[i].color.a + QuickFadeStep);
                }
            } 
            for (var i = 0; i < menuOptionTextFields.Length; i++)
            {
                if (menuOptionTextFields[i].color.a < 0.67f)
                {
                    menuOptionTextFields[i].color = new Color(0.1603774f, 0.08714567f, 0.0f, menuOptionTextFields[i].color.a + QuickFadeStep);
                }
            }
        } 
    }
}