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

namespace BrewMonster.Scripts
{
    public class DebugCmdHistoryListView : MonoBehaviour
    {
        [SerializeField] DlgConsole _console;
        [SerializeField] Transform _content;
        [SerializeField] DebugCmdHistoryListItem _itemPrefab;
        [SerializeField] TMP_Text _emptyText;
        [SerializeField] Button _btnClear;

        private readonly List<DebugCmdHistoryListItem> _items = new List<DebugCmdHistoryListItem>();

        private void Awake()
        {
            if (_btnClear != null)
                _btnClear.onClick.AddListener(OnClearClicked);
        }

        private void OnEnable()
        {
            if (_console != null)
                _console.HistoryChanged += Rebuild;

            Rebuild();
        }

        private void OnDisable()
        {
            if (_console != null)
                _console.HistoryChanged -= Rebuild;
        }

        public void Rebuild()
        {
            if (_content == null || _itemPrefab == null || _console == null)
            {
                SetEmptyTextVisible(true);
                return;
            }

            ClearItems();

            var history = _console.GetHistory();
            if (history == null || history.Count == 0)
            {
                SetEmptyTextVisible(true);
                return;
            }

            SetEmptyTextVisible(false);
            for (int i = 0; i < history.Count; i++)
            {
                var item = Instantiate(_itemPrefab, _content);
                item.gameObject.SetActive(true);
                item.Bind(_console, history[i]);
                _items.Add(item);
            }
        }

        private void OnClearClicked()
        {
            if (_console != null)
                _console.ClearHistory();
        }

        private void ClearItems()
        {
            for (int i = 0; i < _items.Count; i++)
            {
                if (_items[i] != null)
                    Destroy(_items[i].gameObject);
            }
            _items.Clear();
        }

        private void SetEmptyTextVisible(bool visible)
        {
            if (_emptyText != null)
                _emptyText.gameObject.SetActive(visible);
        }
    }
}