using System.Collections;
using System.Collections.Generic;

using UnityEngine;
using UnityEngine.SceneManagement;

public class DataHolder : MonoBehaviour
{
    public static DataHolder main;
    public List<BattleConfig> easyLevels;
    public List<BattleConfig> normalLevels;
    public List<BattleConfig> hardLevels;

    public MissionConfig mission;
    [SerializeField] private string _currentScene;
    private int score = 10;

    private int missionChecker;

    public enum complexityLevels
    {
        easy,
        normal,
        hard,
        all
    };
    private void Awake()
    {
        if(_currentScene == null)
        {
            Debug.LogError("WARNING! _currentScene in DataHolder not found");
        }
        if (main != null && main != this)
        {
            Debug.LogWarning("2 dataholders on the scene");
            Destroy(this);
            return;
        }

        main = this;
    }
    public void SetScore(int _newScore)
    {
        score = _newScore;
    }

    public int GetScore()
    {
        return score;
    }
    public void ChangeScene(string _sceneName)
    {
        SceneManager.LoadScene(_sceneName, LoadSceneMode.Additive);
        SceneManager.UnloadSceneAsync(_currentScene);
        _currentScene = _sceneName;
    }
    //RANDOM LEVELS BLOCK
    public BattleConfig RandomLevel(complexityLevels _complexity)
    {
        switch (_complexity)
        {
            case complexityLevels.easy:
                return RandomEasyLevel();
            case complexityLevels.normal:
                return RandomNormalLevel();
            case complexityLevels.hard:
                return RandomHardLevel();
            default:
                return RandomAllLevel();
        }
    }
    private BattleConfig RandomEasyLevel()
    {
        return easyLevels[Random.Range(0, easyLevels.Count)];
    }
    private BattleConfig RandomNormalLevel()
    {
        return normalLevels[Random.Range(0, normalLevels.Count)]; ;
    }
    private BattleConfig RandomHardLevel()
    {
        return hardLevels[Random.Range(0, hardLevels.Count)];

    }
    private BattleConfig RandomAllLevel()
    {
        int _maxNumber = Random.Range(0, 
            easyLevels.Count + normalLevels.Count + hardLevels.Count);
        if (_maxNumber < easyLevels.Count)
        {
            Debug.Log(_maxNumber);
            return easyLevels[_maxNumber];
        } 
        else if (_maxNumber - easyLevels.Count < normalLevels.Count)
        {

            return normalLevels[_maxNumber - easyLevels.Count];
        } 
        else
        {
            return hardLevels[_maxNumber - easyLevels.Count - normalLevels.Count];
        }
    }
    //RANDOM LEVELS BLOCK END

    public void NewMission(MissionConfig _mission)
    {
        mission = _mission;
        missionChecker = 0;
    }
    public BattleConfig NextBattle()
    {
        missionChecker++;
        if(missionChecker > mission.missionItems.Count)
        {
            return null;
        }
        return mission.missionItems[missionChecker - 1].battle;
    }

    public void ReturnInMainMenu()
    {
        ChangeScene("MainMenu");
    }
}