using JetBrains.Annotations;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using TMPro;
using UnityEngine;

public class UIHandler : MonoBehaviour, IObserver
{
    [Header("Observer Type: ")]
    [SerializeField] private NotificationType notificationType;
    [SerializeField] private List<Building> buildings = new List<Building>();
    private Dictionary<string, GameObject> goInstantiated = new Dictionary<string, GameObject>();
    private Canvas canvas;

    // Start is called before the first frame update
    void Start()
    {
        buildings = FindObjectsOfType<Building>().ToList();

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

        canvas = GetComponent<Canvas>();
    }

    // Update is called once per frame
    void Update()
    {
        
    }

    //Notify the observer
    public void OnNotify(ObserverNotification notification)
    {
        if (notification.NotificationType == notificationType)
        {
            if (notification.ContainsKey("UIObject"))
            {
                GameObject uiObj;
                string message;
                string objectID;

                if (notification.TryGetData("UIObject", out uiObj))
                {
                    if (notification.TryGetData("Message", out message) && notification.TryGetData("ObjectID", out objectID))
                    {
                        // Instantiate the UI object and store it with the unique ID
                        GameObject instance = Instantiate(uiObj, gameObject.transform);

                        instance.GetComponent<TextMeshProUGUI>().text = message;
                        goInstantiated[objectID] = instance;
                    }

                    else
                    {
                        Instantiate(uiObj, gameObject.transform);
                    }
                }
            }

            else if (notification.ContainsKey("DestroyUI"))
            {
                string uniqueID = notification.GetData<string>("DestroyUI");

                if (goInstantiated.ContainsKey(uniqueID))
                {
                    Destroy(goInstantiated[uniqueID]);
                    goInstantiated.Remove(uniqueID);
                }
            }
        }
    }
}