using System;
using System.Collections.Generic;
using System.Linq;
using AibisDream.Framework;
using AibisDream.Kit;
using AibisDream.Utility;
using UnityEngine;
using Yarn.Unity;

namespace AibisDream
{
    public struct DialogOption
    {
        private Action<int> _onOptionSelected;
        private DialogueOption _option;

        public bool IsAvailable => _option.IsAvailable;
        public bool IsTrackable { get; private set; }
        public bool IsExplored { get; private set; }
        public string LineId => _option.TextID;
        public string Line => _option.Line.TextWithoutCharacterName.Text;
        public CharacterVo Character => _option.Line.GetCharacterVo();

        /// <summary>
        /// 选择该选项
        /// </summary>
        public void Select()
        {
            if (!_option.IsAvailable)
            {
                Debug.Log($"{_option.Line} 不可用");
                return;
            }

            EnumEventSystem.Global.Send(DialogEventEnum.OptionSelected, TransToLine());
            _onOptionSelected.Invoke(_option.DialogueOptionID);
        }

        private LineInfo TransToLine()
        {
            return new LineInfo
            {
                isOption = true,
                lineId = _option.TextID,
                lineText = _option.Line.TextWithoutCharacterName.Text,
                character = _option.Line.GetCharacterVo(),
                isAutoSkip = false
            };
        }

        public static DialogOption[] GeneOptions(
            DialogueOption[] dialogueOptions,
            OptionExploreTracker tracker,
            string nodeName,
            IReadOnlyList<string> nodeTags,
            Action<int> onOptionSelected)
        {
            var tags = nodeTags ?? Array.Empty<string>();

            return dialogueOptions.Select(item =>
            {
                var lineId = item.TextID;
                var metadata = item.Line.Metadata ?? Array.Empty<string>();
                var (isTrackable, isExplored) = tracker != null
                    ? tracker.Evaluate(lineId, metadata, nodeName, tags)
                    : (false, false);

                return new DialogOption
                {
                    _option = item,
                    _onOptionSelected = onOptionSelected,
                    IsTrackable = isTrackable,
                    IsExplored = isExplored
                };
            }).ToArray();
        }
    }

    [Serializable]
    public struct TextParam
    {
        public float charSpace;
        public float lineSpace;
        public int maxCharNum;
    }
}