using System.Collections.Generic;
using Cielonos.MainGame.Inventory;
using Cielonos.MainGame.UI;
using Sirenix.OdinInspector;
using SLSUtilities.General;
using TMPro;
using UniRx;
using UnityEngine;
using UnityEngine.Localization.Settings;
using UnityEngine.Serialization;
using UnityEngine.UI;

namespace SLSUtilities.UI
{
    /// <summary>
    /// 通用物品详情面板，显示物品图标、名称、类型、描述条目、标签等信息。
    /// 可被不同的 UIPage 复用（机械台、商店、背包检视等）。
    /// </summary>
    public class ItemDetailPanel : UIElementBase
    {
        [Title("Detail Panel References")] 
        public TMP_Text selectionHintText;
        //public Image itemIcon;
        public TMP_Text nameText;
        public TMP_Text typeRarityText;
        public TMP_Text institutionText;
        public RectTransform tagContainer;
        public GameObject tagPrefab;

        // ─────────────────── 描述条目 ───────────────────

        [Title("Description Entries")]
        [Tooltip("描述条目的容器，应挂载 VerticalLayoutGroup 以实现垂直排列。")]
        public RectTransform descriptionContainer;

        [Tooltip("描述条目预制体，需挂载 ItemDescriptionEntry 组件。")]
        public GameObject descriptionEntryPrefab;

        // ─────────────────── 运行时数据 ───────────────────

        private ItemBase currentItem;
        private readonly List<ItemDescriptionEntry> activeEntries = new List<ItemDescriptionEntry>();

        /// <summary>当前显示的物品。</summary>
        public ItemBase CurrentItem => currentItem;

        /// <summary>
        /// 使用指定物品的数据填充详情面板并显示。
        /// </summary>
        public void SetItem(ItemBase item)
        {
            currentItem = item;

            if (item == null || item.contentData == null)
            {
                ClearPanel();
                return;
            }

            ContentData data = item.contentData;

            // 图标
            /*Sprite icon = data.itemIcon;
            if (itemIcon != null)
            {
                itemIcon.sprite = icon;
                itemIcon.enabled = icon != null;
            }*/

            // 名称（本地化）
            nameText.text = data.displayNameKey.Localize("Items");

            // 类型
            typeRarityText.text = data.itemType.ToString() + " - " + data.itemRarity.ToString();
            
            //机构
            institutionText.text = string.Empty;
            for (var index = 0; index < data.institutions.Count; index++)
            {
                var institution = data.institutions[index];
                string comma = LocalizationSettings.SelectedLocale.Identifier.Code.StartsWith("zh") ? "、" : ", ";
                if(index < data.institutions.Count - 1)
                    institutionText.text += institution.Localize("Items") + comma;
                else
                    institutionText.text += institution.Localize("Items");
            }

            // 描述条目
            RefreshDescriptions(data);

            // 标签
            RefreshTags(data);
            
            selectionHintText.gameObject.SetActive(false);
        }

        /// <summary>清空面板内容并隐藏。</summary>
        public void ClearPanel()
        {
            currentItem = null;

            //if (itemIcon != null) itemIcon.enabled = false;
            if (nameText != null) nameText.text = string.Empty;
            if (typeRarityText != null) typeRarityText.text = string.Empty;

            ClearDescriptions();
            ClearTags();
            selectionHintText.gameObject.SetActive(true);
        }

        // ================================================================
        // 描述条目
        // ================================================================

        private void RefreshDescriptions(ContentData data)
        {
            ClearDescriptions();

            if (descriptionContainer == null || descriptionEntryPrefab == null) return;
            if (data.descriptions == null || data.descriptions.Count == 0) return;

            Dictionary<string, string> descriptionArgs = currentItem?.GetDescriptionArgs();

            foreach (ItemDescription desc in data.descriptions)
            {
                ItemDescriptionEntry entry = Instantiate(descriptionEntryPrefab, descriptionContainer).GetComponent<ItemDescriptionEntry>();
                entry.SetDescription(desc, descriptionArgs);
                activeEntries.Add(entry);
            }
            
            LayoutRebuilder.ForceRebuildLayoutImmediate(descriptionContainer);
        }

        private void ClearDescriptions()
        {
            foreach (ItemDescriptionEntry entry in activeEntries)
            {
                if (entry != null)
                {
                    Destroy(entry.gameObject);
                }
            }
            activeEntries.Clear();
        }

        // ================================================================
        // 标签
        // ================================================================

        private void RefreshTags(ContentData data)
        {
            ClearTags();

            if (tagContainer == null || tagPrefab == null || data.tags == null) return;

            foreach (string tag in data.tags)
            {
                GameObject tagObj = Instantiate(tagPrefab, tagContainer);
                TMP_Text tagText = tagObj.GetComponentInChildren<TMP_Text>();
                if (tagText != null)
                {
                    tagText.text = tag;
                }
            }
        }

        private void ClearTags()
        {
            if (tagContainer == null) return;

            for (int i = tagContainer.childCount - 1; i >= 0; i--)
            {
                Destroy(tagContainer.GetChild(i).gameObject);
            }
        }
    }
}