using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Yarn;
using Yarn.Markup;
using Yarn.Unity;

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

        private const string OptionAttr = "options";

        private const string CommandProp = "name";

        public static bool HasCommandAttr(this MarkupParseResult text)
        {
            return text.TryGetAttributeWithName(CommandAttr, out var attribute1) ||
                   text.TryGetAttributeWithName(OptionAttr, out var attribute2);
        }

        public static bool TryGetCommandAttr(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 IsOptionAttrLine(this MarkupParseResult text)
        {
            return text.TryGetAttributeWithName(OptionAttr, out var outStr);
        }
        
        public static void AddCommandListener(this DialogueRunner runner, CommandHandler onCommand)
        {
            runner.Dialogue.CommandHandler += onCommand;
        }
    }
}