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

public class GameManager : MonoBehaviour
{
    public Transform player;
    public static Transform Player { get { if (instance == null) { return null; } return instance.player; } }

    public static GameManager instance { get; private set; }

    // public Sprite normalFace, sadFace, pogFace;


    public Text timerTxt;
    public float game_start_timer = 5;
    public float game_end_timer = 15;
    public GameObject gameOverPanel;
    public GameObject gameWonPanel;
    // public GameObject[] stars;
    public GameObject[] bees;
    void Awake()
    {
        instance = this;

        gameWonPanel.transform.Find("btn_next").GetComponent<Button>().onClick.AddListener(NextLevel);
        gameWonPanel.transform.Find("btn_leave").GetComponent<Button>().onClick.AddListener(BackToMenu);
        gameOverPanel.transform.Find("btn_leave").GetComponent<Button>().onClick.AddListener(BackToMenu);
        gameWonPanel.transform.Find("btn_restart").GetComponent<Button>().onClick.AddListener(Restart);
        gameOverPanel.transform.Find("btn_restart").GetComponent<Button>().onClick.AddListener(Restart);
    }

    float t;
    bool gameStarted = false;
    bool beesReleased = false;
    public static void StartGame()
    {
        instance.gameStarted= true;
    }

    private void Update()
    {
        if(!gameStarted) { return; }

        t += Time.deltaTime;

        if(t < game_start_timer)
        {
            timerTxt.text = (game_start_timer - t).ToString("n0");
        }else if(t < game_end_timer)
        {
            if (!beesReleased) {
                beesReleased = true;
                ReleaseTheBees();
            } 
                    SetFace(0);

            foreach(GameObject bee in bees){
                if(Vector2.Distance(player.position, bee.transform.position) < 2.5f){
                    SetFace(1);
                }
            }

            timerTxt.text = (game_end_timer - t).ToString("n0");
        }else{
            StopTheBees();
            GameWon();
            SetFace(0);
        }
    }


    void ReleaseTheBees()
    {
        StartCoroutine(releaseTheBees());
    }

    IEnumerator releaseTheBees(){
        foreach(GameObject enemy in bees)
        {
            enemy.SetActive(true);
            // await Task.Delay(200);
            yield return new WaitForSeconds(0.2f);
        }
    }

    void StopTheBees()
    {
        foreach(GameObject enemy in bees)
        {
            enemy.GetComponent<Enemy>().enabled=false;
        }
    }

    public static void GameOver()
    {
        instance.gameOverPanel.SetActive(true);
        instance.gameStarted = false;

        SetFace(2);

        // instance.player.GetComponent<SpriteRenderer>().sprite = instance.sadFace;
    }

    public static void SetFace(int index){
        instance.player.GetChild(0).gameObject.SetActive(0 == index);
        instance.player.GetChild(1).gameObject.SetActive(1 == index);
        instance.player.GetChild(2).gameObject.SetActive(2 == index);
    }

    public static void GameWon(){
        instance.gameStarted = false;
        instance.gameWonPanel.SetActive(true);
        // instance.player.GetComponent<SpriteRenderer>().sprite = instance.pogFace;

        instance.gameWon();
    }

    void gameWon(){
        float fuelLeft = Drawer.instance.drawingFuel.value / Drawer.instance.drawingFuel.maxValue;
        int level = 1;
        if(fuelLeft > 0.65f){
            level=3;
        }else if(fuelLeft> 0.25f){
            level =2;
        }
        Debug.Log("Fuel left : " + fuelLeft);
        for(int i =0;i < 3; i++){
            // stars[i].color = level-1 >= i ? Color.yellow : Color.gray;
            gameWonPanel.transform.Find("Star").GetChild(i+4).gameObject.SetActive(level-1 >= i);
        }

        int levelNumber = int.Parse(SceneManager.GetActiveScene().name.Replace("Level",""));
        Debug.Log($"Level {levelNumber} won with {level} stars");
        LevelSelect.SetLevel(levelNumber,level);
    }

    public void NextLevel(){
        int levelNumber = int.Parse(SceneManager.GetActiveScene().name.Replace("Level",""));

        SceneManager.LoadScene($"Level{levelNumber+1}");
    }

    public void Restart()
    {
        SceneManager.LoadScene(SceneManager.GetActiveScene().name);
    }

    public void BackToMenu(){
        Debug.Log("Loading menu");
        SceneManager.LoadScene(0);
    }
}