using System.Linq;
using AibisDream.SaveSystem;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace AibisDream
{
    public class SaveFileUIController : MonoBehaviour
    {

        #region 索引
        public Button buttonPrefab;
        public Transform buttonParent;
        public Button returnButton;
        #endregion

        private void Start()
        {
            returnButton.onClick.AddListener(HideSaveFileUI);
        }

        public void ShowSaveFileUI()
        {
            // 清空旧按钮
            foreach (Transform child in buttonParent)
            {
                Destroy(child.gameObject);
            }

            var slots = SlotManager.GetSlotViewModels()
                .Where(slot => !slot.IsEmpty)
                .OrderByDescending(slot => slot.SavedAt)
                .ToArray();

            foreach (var slot in slots)
            {
                var button = Instantiate(buttonPrefab, buttonParent);
                var label = string.IsNullOrEmpty(slot.SceneSoName)
                    ? $"Slot {slot.SlotIndex}"
                    : slot.SceneSoName;
                button.GetComponentInChildren<TMP_Text>().text = label;
                var slotIndex = slot.SlotIndex;
                button.onClick.AddListener(() => OnSlotSelected(slotIndex));
            }

            gameObject.SetActive(true);
        }

        private void OnSlotSelected(int slotIndex)
        {
            gameObject.SetActive(false);
            GameManager.Instance.StartWithSlot(slotIndex);
        }

        private void HideSaveFileUI()
        {
            gameObject.SetActive(false);
        }
    }
}