using System;
using System.Collections.Generic;
using System.Linq;
using AibisDream.Kit;
using Yarn;
using Yarn.Markup;
using Yarn.Unity;

namespace AibisDream.Utility
{
    public static class YarnUtil
    {
        private const string CommandAttr = "command";

        private const string PauseAttr = "pause";

        private const string CommandProp = "name";
        
        private const string AutoNext = "auto_next";

        public static bool HasCommandAttr(this MarkupParseResult text)
        {
            return MatchCommandType(text) != CommandLineType.NonCommand;
        }

        public static CommandLineType MatchCommandType(this MarkupParseResult text)
        {
            if (text.TryGetAttributeWithName(CommandAttr, out var attribute1))
            {
                return CommandLineType.OptionCommand;
            }
            
            if (text.TryGetAttributeWithName(PauseAttr, out var attribute2))
            {
                return CommandLineType.Pause;
            }

            return CommandLineType.NonCommand;
        }

        public static bool TryGetOptionCommandAttr(this MarkupParseResult text, out string commandName)
        {
            bool res = text.TryGetAttributeWithName(CommandAttr, out var attribute);
            commandName = res ? attribute.Properties[CommandProp].StringValue : null;
            return res;
        }

        public static bool TryGetPauseCommandAttr(this MarkupParseResult text, out string commandName)
        {
            bool res = text.TryGetAttributeWithName(PauseAttr, out var attribute);
            commandName = res ? attribute.Properties[CommandProp].StringValue : null;
            return res;
        }
        
        public static void AddCommandListener(this DialogueRunner runner, CommandHandler onCommand)
        {
            runner.Dialogue.CommandHandler += onCommand;
        }

        #region 处理行信息

        /// <summary>
        /// 当前行是否应该自动跳过
        /// </summary>
        /// <param name="line">当前行</param>
        /// <returns>是否应该自动跳过</returns>
        public static bool IsAutoSkipLine(this LocalizedLine line)
        {
            return line.Metadata != null && line.Metadata.Contains(AutoNext);
        }

        /// <summary>
        /// 从line中获取角色vo定义
        /// </summary>
        /// <param name="line">行数据</param>
        /// <returns>结果</returns>
        public static CharacterVo GetCharacterVo(this LocalizedLine line)
        {
            if (line.Text.TryGetAttributeWithName("character", out var characterAttribute))
            {
                // 直接写就使用配置选项
                if (characterAttribute.Properties.TryGetValue("name", out var nameValue))
                {
                    return GetCharacterVoByKey(nameValue.StringValue);
                }
                
                // 带key就说明可能有自定义属性
                if (characterAttribute.Properties.TryGetValue("key", out var keyValue))
                {
                    // 先从配置文件找
                    var charVo = GetCharacterVoByKey(keyValue.StringValue);
                    // 再用自定义填充
                    return FullCharVoWithProps(charVo, characterAttribute.Properties);
                }
                
                // 找不到Name和Key
                return new CharacterVo();
            }

            // 没有Character就直接返回空
            return new CharacterVo();
        }
        
        private static CharacterVo GetCharacterVoByKey(string charKey)
        {
            if (ConfigUtil.Instance.TryGetCharacter(charKey, out var character))
            {
                return character.GetStructVo();
            }

            return new CharacterVo
            {
                key = charKey,
                cn = charKey,
                role = ActorRole.Aside
            };
        }

        private static CharacterVo FullCharVoWithProps(CharacterVo vo, IReadOnlyDictionary<string, MarkupValue> props)
        {
            foreach (var pair in props)
            {
                switch (pair.Key)
                {
                    case "cn":
                        vo.cn = pair.Value.StringValue;
                        break;
                    case "nameColor":
                        vo.nameColor = pair.Value.StringValue;
                        break;
                    case "headPicPath":
                        vo.headPicPath = pair.Value.StringValue;
                        break;
                    case "voicePath":
                        vo.voicePath = pair.Value.StringValue;
                        break;
                    case "role":
                        vo.role = Enum.TryParse<ActorRole>(pair.Value.StringValue, out var type) ? type : ActorRole.Aside;
                        break;
                }
            }
            
            return vo;
        }

        #endregion
    }

    public enum CommandLineType
    {
        OptionCommand, Pause, NonCommand
    }
}