using System;
using System.Linq;
using System.Collections.Generic;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace AyaNova.Util
{


    internal static class JsonUtil
    {

        /// <summary>
        /// Clean JSON string fragment, remove unnecessary characters
        /// can be called with anything and should handle it properly even empty values etc
        /// </summary>
        /// <param name="jsonIn"></param>
        /// <returns></returns>
        public static string CompactJson(string jsonIn)
        {
            if (string.IsNullOrWhiteSpace(jsonIn))
            {
                return jsonIn;
            }
            if (jsonIn.StartsWith("["))
            {
                JArray j = JArray.Parse(jsonIn);
                return JsonConvert.SerializeObject(j, Formatting.None);
            }

            if (jsonIn.StartsWith("{"))
            {
                JObject j = JObject.Parse(jsonIn);
                return JsonConvert.SerializeObject(j, Formatting.None);
            }

            //Not an object or an array so just return it, possibly suspect, maybe log this shit
            return jsonIn;
        }


        /// <summary>
        /// Utility used by biz classes to extract all the custom field data as text strings suitable for search indexing
        /// Does not take into account type of field only what is in it and weeds out bools and any other non suitable for search text
        /// </summary>
        /// <param name="jsonIn"></param>
        /// <returns></returns>
        public static List<string> GetCustomFieldsAsStringArrayForSearchIndexing(string jsonIn)
        {
            var ret = new List<string>();

            if (!string.IsNullOrWhiteSpace(jsonIn))
            {
                var j = JObject.Parse(jsonIn);

                //iterate the values in the custom fields
                foreach (KeyValuePair<string, JToken> kv in j)
                {
                    //Add as string any value that isn't a bool since bools are useless for searching
                    //and don't add dates as it gets hellish to factor in time zone conversions and local server vs user date format and all that shit
                    //and at the end of the day it won't really be useful for searching as people will probably ask for a filter or sort instead which we may have to 
                    //look at in future, for search though just the numbers and text that are plausibly search-worthy
                    if (kv.Value.Type != JTokenType.Boolean && kv.Value.Type != JTokenType.Date)
                    {
                        ret.Add(kv.Value.Value<string>());
                    }
                }
            }
            return ret;
        }


    }//eoc

}//eons