using Newtonsoft.Json.Linq;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TEAMModelOS.SDK
{
   public sealed class JsonNetValueSystem : IJsonPathValueSystem
    {
        public bool HasMember(object value, string member)
        {
            if (value is JObject)
                return (value as JObject).Properties().Any(property => property.Name == member);
            if (value is JArray)
            {
                int index = ParseInt(member, -1);
                return index >= 0 && index < (value as JArray).Count;
            }
            return false;
        }

        public object GetMemberValue(object value, string member)
        {
            if (value is JObject)
            {
                var memberValue = (value as JObject)[member];
                return memberValue;
            }
            if (value is JArray)
            {
                int index = ParseInt(member, -1);
                return (value as JArray)[index];
            }
            return null;
        }

        public IEnumerable GetMembers(object value)
        {
            var jobject = value as JObject;
            return jobject.Properties().Select(property => property.Name);
        }

        public bool IsObject(object value)
        {
            return value is JObject;
        }

        public bool IsArray(object value)
        {
            return value is JArray;
        }

        public bool IsPrimitive(object value)
        {
            if (value == null)
                throw new ArgumentNullException("value");

            return value is JObject || value is JArray ? false : true;
        }

        private int ParseInt(string s, int defaultValue)
        {
            int result;
            return int.TryParse(s, out result) ? result : defaultValue;
        }
    }
}