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

public class TaskPanelController : MonoBehaviour
{
    [Header("Panel Information")]
    [SerializeField] protected GameObject _panelContent;
    //[SerializeField] private TaskBox TaskBoxTemplate;
    [SerializeField] private GameObject TaskBoxTemplate;
    [SerializeField] private List<GameObject> TaskBoxList;

    /// <summary>
    /// Fetch reference to static instance of UiManager script
    /// </summary>
    private static UIBaseManager<Task> _uiManager;

    private UIBaseManager<Task> UiManager
    {
        get
        {
            if (_uiManager == null) { _uiManager = FetchUiManager(); }
            
            return _uiManager;
        }
    }

    // TODO decide whick method use and where bind object with itself
    // public abstract void Bind(ManagerInterfac<T>e manager);
    private UIBaseManager<Task> FetchUiManager()  // check if need return by ref
    {
        var uiManager = GameObject.FindObjectOfType<TaskUIManager>();

        // uiManager.SetPanelController(gameObject);  - unnecessary

        return uiManager;
    }
    
    public void InitPanelBoxes(List<Task> _tasks)
    {
        if (_panelContent == null)
            throw new Exception("Panel content is not attaches");

        for(int i = 0; i < _tasks.Count; i++)
        {
            this.AddTask(_tasks[i]);
        }
    }

    protected GameObject SetupTaskBox(Task _task)
    {
        if (TaskBoxTemplate == null)
            throw new Exception("taskbox_template is empty");

        GameObject _newTaskBox = Instantiate(TaskBoxTemplate, _panelContent.transform.position, Quaternion.identity); //.GetComponent<TaskBox>();

        _newTaskBox.transform.SetParent(_panelContent.transform);

        _newTaskBox.transform.localScale = new Vector3(2.5f, 2.5f, 1.0f);

        _newTaskBox.GetComponent<TaskBox>().SetTask(_task);

        return _newTaskBox;
    }

    public void Setup(List<Task> _tasks)
    {
        this.InitPanelBoxes(_tasks);
    }

    public void AddTask(Task _task)
    {
        // update TaskManager main list of task
        //TaskManager.Instance.AddTask(_task);

        // add task to local panel contant
        GameObject newTaskBox = SetupTaskBox(_task);

        // Set new Slot instance
        TaskBoxList.Add(newTaskBox);
    }
}