using UnityEngine;
using Yarn.Unity;
using Sirenix.OdinInspector;

namespace SLSUtilities.Narrative.UI
{
    /// <summary>
    /// 高级选项展现层，继承自官方 OptionsPresenter。
    /// </summary>
    public class AdvancedOptionsPresenter : OptionsPresenter
    {
        [TitleGroup("Advanced Settings", Alignment = TitleAlignments.Centered)]
        [BoxGroup("Advanced Settings/Prefabs")]
        [Required("需要指定 AdvancedOptionItem 预制体")]
        [SerializeField] private AdvancedOptionItem advancedOptionViewPrefab;

        public override YarnTask OnDialogueStartedAsync()
        {
            // 建立关键词缓存，保证 ProcessWithMarkup 能正确查找关键词数据
            // （不依赖 AdvancedLinePresenter 是否已经运行）
            if (StorySystem.Database != null)
                KeywordProcessor.BuildCache(StorySystem.Database.keywords);

            return base.OnDialogueStartedAsync();
        }

        public override YarnTask<DialogueOption?> RunOptionsAsync(DialogueOption[] dialogueOptions, LineCancellationToken cancellationToken)
        {
            // 过滤掉不可用且带有 "hide" 或 "#hide" 标签的选项
            var filteredOptions = new System.Collections.Generic.List<DialogueOption>();
            foreach (var option in dialogueOptions)
            {
                bool shouldHide = false;
                if (!option.IsAvailable && option.Line != null && option.Line.Metadata != null)
                {
                    foreach (var tag in option.Line.Metadata)
                    {
                        if (tag.Equals("hide", System.StringComparison.OrdinalIgnoreCase) || 
                            tag.Equals("#hide", System.StringComparison.OrdinalIgnoreCase))
                        {
                            shouldHide = true;
                            break;
                        }
                    }
                }

                if (!shouldHide)
                {
                    filteredOptions.Add(option);
                }
            }

            return base.RunOptionsAsync(filteredOptions.ToArray(), cancellationToken);
        }

        protected override OptionItem CreateNewOptionView()
        {
            var targetTransform = canvasGroup != null ? canvasGroup.transform : this.transform;
            
            var optionView = Instantiate(advancedOptionViewPrefab, targetTransform, false);
            
            if (optionView == null)
            {
                Debug.LogError("Failed to instantiate advancedOptionViewPrefab.");
                return null;
            }

            optionView.transform.SetAsLastSibling();
            optionView.gameObject.SetActive(false);

            return optionView;
        }
    }
}