using System.Collections.Generic;
using System.Linq;
using AyaNova.Biz;
using Newtonsoft.Json.Linq;
using AyaNova.Api.ControllerHelpers;
using Microsoft.AspNetCore.Mvc;
using AyaNova.Models;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using EnumsNET;



namespace AyaNova.PickList
{
    internal static class PickListFetcher
    {


        internal static async Task<List<NameIdActiveItem>> GetResponseAsync(AyaType ayaType, string autoCompleteQuery, bool includeInactive, AyContext ct, AuthorizationRoles userRoles)
        {

            var PickList = PickListFactory.GetAyaPickList(ayaType);

            //was the name not found as a list?
            if (PickList == null)
            {
                throw new System.ArgumentOutOfRangeException($"PickList for type \"{ayaType}\" specified does not exist");
            }

            //check rights

            if (!userRoles.HasAnyFlags(PickList.AllowedRoles))
                throw new System.UnauthorizedAccessException("User roles insufficient for this datalist");

            //Template
            string Template = null;
            //Attempt to fetch custom template              
            var t = await ct.PickListTemplate.FirstOrDefaultAsync(m => m.Id == ((long)ayaType));
            if (t == null)
            {
                Template = PickList.DefaultTemplate;
            }
            else
            {
                Template = t.Template;
            }

            //parse the template 
            var jTemplate = JArray.Parse(Template);


            //Get the field key names in a list from the template
            List<string> TemplateColumnNames = PickList.GetFieldListFromTemplate(jTemplate);

            //BUILD THE QUERY                   

            var q = PickListSqlBuilder.Build(PickList, TemplateColumnNames, autoCompleteQuery, includeInactive);



            //RETURN OBJECTS  
            var ret = new List<NameIdActiveItem>();


            //QUERY THE DB
            using (var command = ct.Database.GetDbConnection().CreateCommand())
            {
                await ct.Database.OpenConnectionAsync();

                //GET DATA RETURN ROWS
                command.CommandText = q;
                using (var dr = await command.ExecuteReaderAsync())
                {
                    while (dr.Read())
                    {
                        //query is always in the same order:
                        //plId, plActive, plName
                        ret.Add(new NameIdActiveItem
                        {
                            Id = dr.GetInt64(0),
                            Active = dr.GetBoolean(1),
                            Name = dr.GetString(2)
                        });

                        //                         List<AyaFieldData> row = new List<AyaFieldData>(returnRowColumnCount);


                        //                         //INSERT REMAINING FIELDS FROM TEMPLATE INTO THE RETURN ROWS LIST
                        //                         foreach (string TemplateField in ListViewFieldList)
                        //                         {

                        //                             //get the AyaObjectFieldDefinition
                        //                             AyaPickListFieldDefinition f = PickList.FieldDefinitions.FirstOrDefault(x => x.FieldKey == TemplateField);
                        //                             if (f.IsCustomField)
                        //                             {

                        //                                 AyaFieldData AyaField = new AyaFieldData();
                        //                                 var cust = dr.GetString(SelectBuild.map[f.GetSqlValueColumnName()]);
                        //                                 if (!string.IsNullOrWhiteSpace(cust))
                        //                                 {
                        //                                     JObject j = JObject.Parse(cust);
                        //                                     //convert field name to cust name then get value
                        //                                     var InternalCustomFieldName = AyaFormFieldDefinitions.TranslateLTCustomFieldToInternalCustomFieldName(TemplateField);
                        //                                     //Sometimes a custom field is specified but doesn't exist in the collection so don't assume it's there
                        //                                     // AyaField.v = j[InternalCustomFieldName].Value<object>();
                        //                                     JToken o = j[InternalCustomFieldName];
                        //                                     if (o != null)
                        //                                         AyaField.v = o.Value<object>();
                        //                                     else
                        //                                         AyaField.v = null;

                        //                                     row.Add(AyaField);
                        //                                 }

                        //                                 /*
                        //                                 TODO: Custom field handling
                        //                                 GetName works just not with multipart identifiers
                        //                                 I could force naming by making all fields and AS, or
                        //                                 I could map the ordinal when generating the Select fields so that I have a map to refer to here
                        //                                 mapping in advance actually makes a lot of sense, then no more of this fragility of going by pointer index and hoping for the best
                        //                                 it would just be premapped out.

                        //                                 dr.GetOrdinal(f.SqlValueColumnName)
                        // 'dr.GetOrdinal(f.SqlValueColumnName)' threw an exception of type 'System.IndexOutOfRangeException'
                        // f.SqlValueColumnName
                        // "awidget.customfields"
                        // dr.GetName(nCurrentColumnPointer)
                        // "customfields"
                        // dr.GetOrdinal("customfields");
                        // 5

                        //                                 */
                        //                             }
                        //                             else
                        //                             {
                        //                                 AyaFieldData AyaField = new AyaFieldData();
                        //                                 AyaField.v = dr.GetValue(SelectBuild.map[f.GetSqlValueColumnName()]);


                        //                                 if (f.SqlIdColumnName != null)
                        //                                 {
                        //                                     var ordinal = SelectBuild.map[f.SqlIdColumnName];
                        //                                     if (!await dr.IsDBNullAsync(ordinal))
                        //                                         AyaField.i = dr.GetInt64(ordinal);

                        //                                 }
                        //                                 row.Add(AyaField);
                        //                             }
                        //                         }
                        //                         rows.Add(row);
                    }
                }


            }


            return ret;
        }


    }//eoc
}//eons