using System.Collections.Generic;
using System;
using System.Globalization;
using System.Text;
using Newtonsoft.Json.Linq;
using System.Linq;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;

namespace AyaNova.Biz
{
    public static class SqlSelectBuilder
    {

        //Build the SELECT portion of a list query based on the template, mini or full and the object key in question 
        public static string Build(string objectKey, string template, bool mini)
        {

            //parse the template
            var jtemplate = JObject.Parse(template);

            //get the fields list
            var objectFieldsList = ObjectFields.ObjectFieldsList(objectKey);

            //convert to strings array (https://stackoverflow.com/a/33836599/8939)
            string[] templateFieldList;
            if (mini)
            {
                templateFieldList = ((JArray)jtemplate["mini"]).ToObject<string[]>();
            }
            else
            {
                templateFieldList = ((JArray)jtemplate["full"]).ToObject<string[]>();
            }

            StringBuilder sb = new StringBuilder();
            sb.Append("SELECT ");

            //Default ID column for each row (always is _df_)
            ObjectField def = objectFieldsList.FirstOrDefault(x => x.Key == "_df_");
            if (def == null)
            {
                throw new System.ArgumentNullException($"SqlSelectBuilder: objectFieldList for key \"{objectKey}\" is missing the _df_ default field");
            }
            sb.Append(def.SqlIdColumn);
            sb.Append(" AS _df_ ");

            foreach (string ColumnName in templateFieldList)
            {
                ObjectField o = objectFieldsList.FirstOrDefault(x => x.Key == s);
                if (o != null)
                {//Here is where we can vet the field name, if it doesn't exist though, for now we'll just ignore those ones

                    sb.Append(",");
                    sb.Append("{");
                    //Build required part of column definition
                    sb.Append($"\"cm\":\"{o.Key}\",\"dt\":{(int)o.DataType}");

                    //Has a AyObjectType? (linkable / openable)
                    if (o.AyObjectType != 0)
                        sb.Append($",\"ay\":{(int)o.AyObjectType}");

                    sb.Append("}");

                }
            }




            return sb.ToString();
        }



    }//eoc
}//ens