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

public class GameStateManager : MonoBehaviour {
    public GameObject[] pauseObjects;
    private bool _isPaused;
    public Image soundImage;
    public Sprite muteSprite;
    public Sprite unmuteSprite;
    private bool _isPlaying = false;
    public AudioSource audioGamePlay;

    public Image pauseSnakeHead;
    private List<SnakeSection> _tail;
    public SnakeSection section1;
    public SnakeSection section2;
    public SnakeSection section3;
    public SnakeSection section4;
    public SnakeSection section5;
    public SnakeSection section6;
    public SnakeSection section7;
    public SnakeSection section8;
    public SnakeSection section9;
    public SnakeSection section10;
    public SnakeSection section11;

    // Use this for initialization
    void Start () {
        Time.timeScale = 1;
        pauseObjects = GameObject.FindGameObjectsWithTag("ShowOnPause");
        HidePaused();
        _isPaused = false;
        soundImage.sprite = unmuteSprite;
        audioGamePlay = GetComponent<AudioSource>();
        audioGamePlay.Play(0);
        pauseSnakeHead.transform.rotation = Quaternion.Euler(0, 0, 0);
        _tail = new List<SnakeSection>();
        _tail.Add(section1);
        _tail.Add(section2);
        _tail.Add(section3);
        _tail.Add(section4);
        _tail.Add(section5);
        _tail.Add(section6);
        _tail.Add(section7);
        _tail.Add(section8);
        _tail.Add(section9);
        _tail.Add(section10);
        _tail.Add(section11);
    }

    IEnumerator Movement()
    {
        while (true)
        {
            //Move();
            yield return new WaitForSeconds(0.8f);
            Debug.Log("Some action");
        }
    }

    void Move()
    {
        Vector2 currentPosition = pauseSnakeHead.transform.position;

        if (pauseSnakeHead.transform.position.x == 220 && pauseSnakeHead.transform.position.y == 167)
        {
            pauseSnakeHead.transform.rotation = Quaternion.Euler(0, 0, 90);
        }
        else if (pauseSnakeHead.transform.position.x == -260 && pauseSnakeHead.transform.position.y == 167)
        {
            pauseSnakeHead.transform.rotation = Quaternion.Euler(0, 0, 180);
        }
        else if (pauseSnakeHead.transform.position.x == -260 && pauseSnakeHead.transform.position.y == -163)
        {
            pauseSnakeHead.transform.rotation = Quaternion.Euler(0, 0, 270);
        }
        else if (pauseSnakeHead.transform.position.x == 220 && pauseSnakeHead.transform.position.y == -163)
        {
            pauseSnakeHead.transform.rotation = Quaternion.Euler(0, 0, 0);
        }

        pauseSnakeHead.transform.Translate(0, 30, 0);

        _tail.Last().transform.position = currentPosition;
        _tail.Insert(0, _tail.Last());
        _tail.RemoveAt(_tail.Count - 1);
    }

    // Update is called once per frame
    void Update () {
        if (Input.GetKeyUp(KeyCode.P))
        {
            if (Time.timeScale == 1)
            {
                Time.timeScale = 0;
                ShowPaused();
                StartCoroutine(Movement());
            }
            else if (Time.timeScale == 0)
            {
                Time.timeScale = 1;
                HidePaused();
            }
        }

        if (Input.GetKeyUp(KeyCode.M))
        {
            if (_isPlaying)
            {
                audioGamePlay.Pause();
                soundImage.sprite = muteSprite;
            }
            else
            {
                audioGamePlay.UnPause();
                soundImage.sprite = unmuteSprite;

            }
            _isPlaying = !_isPlaying;
        }
    }

    public bool isPaused() {
        return _isPaused;
    }

    public void ShowPaused()
    {
        foreach (GameObject gameObject in pauseObjects)
        {
            gameObject.SetActive(true);
        }
        _isPaused = true;
        audioGamePlay.Pause();
    }

    public void HidePaused()
    {
        foreach (GameObject gameObject in pauseObjects)
        {
            gameObject.SetActive(false);
        }
        _isPaused = false;
        audioGamePlay.UnPause();
    }

    public void ResumeGame() {
        Time.timeScale = 1;
        HidePaused();
    }

    public void StartGame()
    {
        SceneManager.LoadScene("GamePlay");
    }

    public void ExitGame()
    {
        SceneManager.LoadScene("MainMenu");
    }
}