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

public class HUDController : MonoBehaviour
{
    public GameObject pauseMenu;
    public GameObject pointer;
    public GameObject gameOverMenu;
    public GameObject lvlCompletedScreen;
    PlayerController plCtrl;
    private bool isShowing;
    private Button[] buttons;
    public int pointerLoc;
    public int maxLoc;
    public int lastLoc;
    private bool gameIsOver = false;
    private bool lvlComp = false;
    PlayerHealth health;
    public int score;
    public int displayScore;
    public Text scoreText;
    private int inhalers;
    private bool onMain = false;

    private void Start()
    {
        if (SceneManager.GetActiveScene().name != "Main")
        {
            health = GameObject.Find("Player").GetComponent<PlayerHealth>();
            plCtrl = GameObject.Find("Player").GetComponent<PlayerController>();
        }
        else
        {
            onMain = true;
            isShowing = true;
            GetButtonList();
            buttons[0].image.rectTransform.sizeDelta = new Vector2(250, 48);
        }
    }

    void Update()
    {
        if (!onMain && !gameIsOver && !lvlComp && Input.GetKeyDown(KeyCode.Escape))
        {
            isShowing = !isShowing;
            pauseMenu.SetActive(isShowing);
            pointer.SetActive(isShowing);
            if (buttons == null)
            {
                GetButtonList();
            }
            buttons[0].image.rectTransform.sizeDelta = new Vector2(250, 48);
            if (isShowing)
            {
                Time.timeScale = 0;
            }
            else
            {
                buttons[pointerLoc].image.rectTransform.sizeDelta -= new Vector2(10, 0);
                pointerLoc = 0;
                Time.timeScale = 1;
            }
            pointer.transform.localPosition = buttons[0].transform.localPosition - new Vector3(160, 42, 0);

        }
        if (isShowing || gameIsOver || lvlComp)
        {
            if (Input.GetKeyDown(KeyCode.S) || Input.GetKeyDown(KeyCode.DownArrow))
            {
                lastLoc = pointerLoc;
                pointerLoc++;
                if (pointerLoc < maxLoc)
                {
                    pointer.transform.localPosition -= new Vector3(0, 58, 0);
                    Debug.Log("should move");
                }
                else
                {
                    pointerLoc = 0;
                    pointer.transform.localPosition += new Vector3(0, (maxLoc - 1) * 58, 0);
                }
                buttons[lastLoc].image.rectTransform.sizeDelta -= new Vector2(10, 0);
                buttons[pointerLoc].image.rectTransform.sizeDelta += new Vector2(10, 0);
                Debug.Log(buttons[pointerLoc].name);
            }
            if (Input.GetKeyDown(KeyCode.W) || Input.GetKeyDown(KeyCode.UpArrow))
            {
                lastLoc = pointerLoc;
                pointerLoc--;
                if (pointerLoc < 0)
                {
                    pointerLoc = maxLoc - 1;
                    pointer.transform.localPosition -= new Vector3(0, (maxLoc - 1) * 58, 0);
                }
                else
                {
                    pointer.transform.localPosition += new Vector3(0, 58, 0);
                }
                buttons[lastLoc].image.rectTransform.sizeDelta -= new Vector2(10, 0);
                buttons[pointerLoc].image.rectTransform.sizeDelta += new Vector2(10, 0);
            }
            if (Input.GetKeyDown(KeyCode.Space) || Input.GetKeyDown(KeyCode.KeypadEnter))
            {
                switch (buttons[pointerLoc].name)
                {
                    case "ButtonContinue":                      // Continue
                        Continue();
                        break;
                    case "ButtonRestart":                       // Restart
                        Restart();
                        break;
                    case "ButtonHowToPlay":                     // How To Play
                        HowToPlay();
                        break;
                    case "ButtonQuit":                          // Quit
                        Exit();
                        break;
                    case "ButtonNextLevel":                     // Next Level
                        NextLevel();
                        break;
                    case "ButtonStart":
                        StartGame();
                        break;
                    case "ButtonMainMenu":
                        GoToMain();
                        break;
                }
            }
        }
    }
    public void GoToMain()
    {
        SceneManager.LoadScene("Main");
    }
    public void StartGame()
    {
        SceneManager.LoadScene("Level1");
    }

    public void Continue()
    {
        pointer.transform.localPosition += new Vector3(0, (pointerLoc) * 58, 0);
        buttons[pointerLoc].image.rectTransform.sizeDelta -= new Vector2(10, 0);
        pointerLoc = 0;
        isShowing = !isShowing;
        pauseMenu.SetActive(isShowing);
        pointer.SetActive(isShowing);
        Time.timeScale = 1;
    }
    public void Restart()
    {
        SceneManager.LoadScene(SceneManager.GetActiveScene().name);
        Time.timeScale = 1;
    }
    public void HowToPlay()
    {
        SceneManager.LoadScene("Tutorial");
    }
    public void Exit()
    {
        Application.Quit();
    }
    public void GameOver()
    {
        Debug.Log("U ded bro");
        gameIsOver = true;
        StartCoroutine(DeathTimer());
    }
    public void LevelCompleted()
    {
        Debug.Log("Level completed!");
        gameIsOver = true;
        pointer.SetActive(true);
        Time.timeScale = 0;
        lvlCompletedScreen.SetActive(true);
        buttons = null;
        GetButtonList();
        buttons[0].image.rectTransform.sizeDelta = new Vector2(250, 48);
        pointer.transform.localPosition = buttons[0].transform.localPosition - new Vector3(160, 42, 0);
        score = Mathf.RoundToInt(health.currentHealth);
        health.lvlComp = true;
        inhalers = health.inhalers;
        StartCoroutine(ScoreUpdater());
    }
    public void NextLevel()
    {
        SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex + 1);
        Time.timeScale = 1;
    }
    private void GetButtonList()
    {
        buttons = GetComponentsInChildren<Button>();
        maxLoc = buttons.Length;
    }
    private IEnumerator ScoreUpdater()
    {
        while (displayScore < score)
        {
            displayScore++;
            health.ChangeHealth(-1);
            scoreText.text = "SCORE: " + displayScore;
            yield return new WaitForSecondsRealtime(0.02f);
        }
        yield return new WaitForSecondsRealtime(0.5f);
        if (inhalers > 0)
        {
            for (int i = 0; i < inhalers; i++)
            {
                score += 20;
                health.addInhalers(-1);
                while (displayScore < score)
                {
                    displayScore++;
                    scoreText.text = "SCORE: " + displayScore;
                    yield return new WaitForSecondsRealtime(0.02f);
                }
                yield return new WaitForSecondsRealtime(0.3f);
            }
        }
    }
    private IEnumerator DeathTimer()
    {
        while(!plCtrl.startDying)
        {
            yield return new WaitForSecondsRealtime(0.1f);
        }
        yield return new WaitForSecondsRealtime(2.5f);
        pointer.SetActive(true);
        Time.timeScale = 0;
        gameOverMenu.SetActive(true);
        buttons = null;
        GetButtonList();
        buttons[0].image.rectTransform.sizeDelta = new Vector2(250, 48);
        pointer.transform.localPosition = buttons[0].transform.localPosition - new Vector3(160, 42, 0);
    }
}