using System.Collections.Generic;
using UnityEngine;

namespace SepCore.UI
{
    public partial class DisplayListForm
    {
        private readonly List<DisplayItem> _displayItems = new List<DisplayItem>();

        public void OnInit(DisplayListContext context)
        {
            View.titleFormatText.Set(context.CurrentCount, context.MaxCount);

            int targetCount = Mathf.Min(context.CurrentCount, context.ItemContexts.Length);
            EnsureItemCount(targetCount);

            for (int i = 0; i < _displayItems.Count; i++)
            {
                DisplayItem item = _displayItems[i];
                if (i < targetCount)
                {
                    item.OnInit(context.ItemContexts[i], i).Forget();
                    item.gameObject.SetActive(true);
                }
                else
                {
                    item.OnReset();
                    item.gameObject.SetActive(false);
                }
            }
        }

        public void OnReset()
        {
            for (int i = 0; i < _displayItems.Count; i++)
            {
                _displayItems[i].OnReset();
                _displayItems[i].gameObject.SetActive(false);
            }
        }

        private void EnsureItemCount(int count)
        {
            while (_displayItems.Count < count)
            {
                DisplayItem item = Instantiate(View.displayItemTemplate, View.listRoot.transform);
                _displayItems.Add(item);
            }
        }
    }
}