using System.Collections;
using TMPro;
using Unity.PlasticSCM.Editor.WebApi;
using UnityEditor.UI;
using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.SceneManagement;
using UnityEngine.UI;

public class GameManager : MonoBehaviour
{
    public enum GameState
    {
        InMainMenu,
        Paused,
        Playing,
        GameOver,
        Won
    }

    //private PlayerData playerData;
    //private SaveManager saveManager;

    public static GameManager gameManagerInstance { get; private set; }

    [SerializeField] AudioSource audioSource;

    [SerializeField] int currentOrbCounter;
    [SerializeField] int maximumOrbs;
    public GenerateOrbs generator;

    public TMP_InputField userSeed;
    public int seed;

    [SerializeField] TextMeshProUGUI orbCounterText;

    private float initialTime;
    [SerializeField] float timeUntilNightfall;
    [SerializeField] TextMeshProUGUI timerText;
    public bool bHasTimerStarted;

    [SerializeField] GameObject player;
    [SerializeField] Transform playerTransform;
    public bool bHasPlayerLanded;

    public bool bIsGameStarted = false;

    public GameState gameState = GameState.InMainMenu;

    private void Awake()
    {
        if(gameManagerInstance == null)
        {
            gameManagerInstance = this;

            initialTime = timeUntilNightfall;

            SceneManager.sceneLoaded += OnSceneLoaded;
            //saveManager = GetComponent<SaveManager>();
            //playerData = saveManager.LoadGame();
            /*if (playerData != null)
            {
                SetPlayerData();
            }
            else
            {
                playerData = new PlayerData();
            }*/

            DontDestroyOnLoad(gameObject);

        }
        else
        {
            Destroy(gameObject);
        }
    }

    private void OnSceneLoaded(Scene scene, LoadSceneMode mode)
    {
        if(scene.name == "MainMap")
        {
            bIsGameStarted = false;
            audioSource.mute = false;
            currentOrbCounter = 0;
            timeUntilNightfall = initialTime;

            playerTransform = GameObject.Find("Player").transform;
            player = GameObject.Find("Player");
            GameObject orbObject = GameObject.Find("Orb_Text");
            if (orbObject)
            {
                orbCounterText = orbObject.GetComponent<TextMeshProUGUI>();
            }

            GameObject timerObject = GameObject.Find("Timer");
            if (timerObject)
            {
                timerText = timerObject.GetComponent<TextMeshProUGUI>();
            }

            StartCoroutine(WaitAndSpawnOrbs());

            UpdateOrbUI();
            UpdateTimerUI();
        }
        else if(scene.name == "MainMenu")
        {
            if (audioSource.mute) 
            {
                audioSource.mute = false;
            }
            currentOrbCounter = 0;
            timeUntilNightfall = initialTime;
            userSeed = GameObject.Find("SeedField").GetComponent<TMP_InputField>();
        }
        else if(scene.name == "VictoryScene")
        {
            audioSource.mute = true;
            currentOrbCounter = 0;
            timeUntilNightfall = initialTime;
        }
        else if(scene.name == "GameOverScene")
        {
            audioSource.mute = true;
            currentOrbCounter = 0;
            timeUntilNightfall = initialTime;
        }
    }

    IEnumerator WaitAndSpawnOrbs()
    {
        yield return null;

        yield return new WaitForFixedUpdate();

        generator = GetComponent<GenerateOrbs>();
        if (generator) generator.StartGenerating(playerTransform);
    }

    private void Update()
    {
        if (gameState == GameState.Playing && !bHasPlayerLanded)
        {
            if (playerTransform != null)
            {
                if (Physics.Raycast(playerTransform.position, Vector3.down, out RaycastHit hit, 2f))
                {
                    if (hit.collider.CompareTag("Floor"))
                    {
                        bHasPlayerLanded = true;
                    }
                }
            }
        }

        if (gameState == GameState.Playing && bIsGameStarted)
        {
            HandleTimer();
        }
    }

    private void HandleTimer()
    {
        if(timeUntilNightfall > 0)
        {
            timeUntilNightfall -= Time.deltaTime;
            UpdateTimerUI();
        }
        else
        {
            timeUntilNightfall = 0;
            GameOver();
        }
    }

    private void UpdateTimerUI()
    {
        if (timerText)
        {
            int minutes = Mathf.FloorToInt(timeUntilNightfall / 60);
            int seconds = Mathf.FloorToInt(timeUntilNightfall % 60);
            timerText.text = string.Format("{0:00}:{1:00}", minutes, seconds);
        }
    }

    public void IncreaseOrbCounter()
    {
        currentOrbCounter++;
        UpdateOrbUI();
        CheckAllOrbsCollected();
    }

    private void UpdateOrbUI()
    {
        if(orbCounterText != null)
        {
            orbCounterText.text = currentOrbCounter + "/" + maximumOrbs;
        }
    }

    private void CheckAllOrbsCollected()
    {
        if(currentOrbCounter >= maximumOrbs)
        {
            gameState = GameState.Won;
            SceneManager.LoadScene("VictoryScene");
        }
    }

    private void GameOver()
    {
        gameState = GameState.GameOver;
        SceneManager.LoadScene("GameOverScene");
    }

    public void StartGame()
    {
        gameState = GameState.Playing;
        bHasPlayerLanded = false;
        if (userSeed != null)
        {
            //PlayerData playerData = new PlayerData();
            if (!int.TryParse(userSeed.text, out int number))
            {
                System.Random randomSeed = new System.Random();
                seed = randomSeed.Next();
            }
            else
            {
                seed = number;
            }
        }
        else
        {
            System.Random randomSeed = new System.Random();
            seed = randomSeed.Next();
        }
        //saveManager.SaveGame(playerData);

        SceneManager.LoadScene("MainMap");
    }

/*    public void LoadGame()
    {
        PlayerData playerData = saveManager.LoadGame();
        if(playerData != null)
        {
            SceneManager.LoadScene("MainMap");
        }
        else
        {
            Debug.LogError("No save found");
        }
    }*/

    public void GoBackToMainMenu()
    {
        gameState = GameState.InMainMenu;
        SceneManager.LoadScene("MainMenu");
    }

    public int GetMaximumOrbs()
    {
        return maximumOrbs;
    }

/*    void GetPlayerData()
    {
        if(player != null)
        {
            playerData.playerPosition = player.transform.position;
        }
        playerData.numberOfOrbsCollected = currentOrbCounter;
        //playerData.orbs = generator.orbs;
    }*/

/*    void SetPlayerData()
    {
        if(playerData.playerPosition != Vector3.zero && player != null)
        {
            player.transform.position = playerData.playerPosition;
        }
        currentOrbCounter = playerData.numberOfOrbsCollected;
        UpdateOrbUI();
    }*/

/*    public void SaveData()
    {
        GetPlayerData();
        saveManager.SaveGame(playerData);
    }*/
}