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

public class HotkeyUIController : MonoBehaviour
{
    public static HotkeyUIController Instance;


    public GameObject hotkeyEntryPrefab; // Assign the HotkeyEntry prefab
    public Transform hotkeyListContainer; // Assign the Content transform of ScrollView
    public HotkeyManager hotkeyManager;

    private readonly Dictionary<string, GameObject> hotkeyEntries = new();

    public void Awake()
    {
        if (Instance == null)
            Instance = this;
        else
            Destroy(gameObject);
    }

    // private void Start()
    // {
    //     PopulateHotkeyList();
    // }


    public void ClearChildren(Transform parentTransform)
    {
        // var parentTransform = parentObject.transform;

        // Detach all the children from the parent
        for (var i = parentTransform.childCount - 1; i >= 0; i--)
        {
            var childTransform = parentTransform.GetChild(i);
            childTransform.SetParent(null);
        }

        // Destroy all the detached children
        foreach (Transform child in parentTransform) Destroy(child.gameObject);
    }

    public void PopulateHotkeyList()
    {
        Debug.Log("Getting all hot keys");
        var hotkeys = hotkeyManager.GetAllHotkeys();

        Debug.Log("Clearing Children");
        ClearChildren(hotkeyListContainer);


        foreach (var hotkey in hotkeys)
        {
            var entry = Instantiate(hotkeyEntryPrefab, hotkeyListContainer);
            var actionName = entry.transform.Find("ActionName").GetComponent<TMP_Text>();
            var keyName = entry.transform.Find("KeyName").GetComponent<TMP_InputField>();
            var changeButton = entry.transform.Find("ChangeButton").GetComponent<Button>();

            Debug.Log(actionName);
            Debug.Log(hotkey);
            Debug.Log(hotkey.Key);
            Debug.Log(hotkey.Value);
            Debug.Log(hotkey.Value.ToString());
            actionName.text = hotkey.Key;
            Debug.Log(keyName);
            Debug.Log(keyName.text);
            keyName.text = hotkey.Value.ToString();

            var currentAction = hotkey.Key;
            changeButton.onClick.AddListener(() => StartHotkeyChange(currentAction, keyName));

            hotkeyEntries[currentAction] = entry;
        }
    }

    private void StartHotkeyChange(string actionName, TMP_InputField keyNameText)
    {
        Debug.Log("Waiting for key change");
        StartCoroutine(WaitForKey(actionName, keyNameText));
    }

    private IEnumerator WaitForKey(string actionName, TMP_InputField keyNameText)
    {
        var keyAssigned = false;
        while (!keyAssigned)
        {
            foreach (KeyCode key in Enum.GetValues(typeof(KeyCode)))
                if (Input.GetKeyDown(key))
                {
                    HotkeyManager.Instance.UpdateHotkey(actionName, key);
                    keyNameText.text = key.ToString();
                    keyAssigned = true;
                    break;
                }

            yield return null;
        }
    }
}