using System.Collections.Generic;
using System.Data;
using Kreta.BusinessLogic.Classes.MobileApi.Naplo.V2.Co.Get.Tanmenet;
using Kreta.BusinessLogic.Classes.MobileApi.Naplo.V2.Logic;
using Kreta.Core.Validation.Exceptions;
using Kreta.Core.Validation.Exceptions.Enum;
using Kreta.DataAccessManual.Interfaces;

namespace Kreta.BusinessLogic.Classes.MobileApi.Naplo.V2.SubqueriesRepo
{
    public static class TanmenetSubqueries
    {
        public static List<TanmenetGetResponseCo> ListTanmenet(IDalHandler h, int teacherId, int tanevId, int intezmenyId, string intezmenyAzonosito, TanmenetGetRequestCo request)
        {
            var allowedRequestRecordLength = 10;
            if (request.Key.Length > allowedRequestRecordLength)
            {
                throw new ValidationException(ValidationErrorType.Undefined, $"Hiba történt, {nameof(allowedRequestRecordLength)}={allowedRequestRecordLength}!");
            }

            var errors = new List<ValidationExceptionItem>();
            var tanarHelyettesitesLogic = new HelyettesitesLogic.Tanar(teacherId, tanevId, intezmenyId, intezmenyAzonosito, null);

            for (int i = 0; i < request.Key.Length; i++)
            {
                var tanmenetKey = request.Key[i];

                if (tanmenetKey.FeltoltoTanarId != teacherId && !tanarHelyettesitesLogic.IsHelyettesito(tanmenetKey.OsztalyCsoportId, tanmenetKey.TantargyId))
                {
                    errors.Add(new ValidationExceptionItem(i.ToString(), $"Nincs jogosultsága, csak a saját vagy helyettesítési tanmenet kérdezhető le!"));
                }
            }

            if (errors.Count > 0)
            {
                throw new ValidationException(ValidationErrorType.Undefined, "Hiba történt!", errors);
            }

            var response = new List<TanmenetGetResponseCo>();
            var tanmenetDal = h.Tanmenet();

            foreach (var tanmenetKey in request.Key)
            {
                var tanmenetItems = new List<TanmenetItemGetResponseCo>();
                var tanmenetItemDt = tanmenetDal.GetTanmenetek(tanmenetKey.TantargyId, tanmenetKey.OsztalyCsoportId, tanmenetKey.FeltoltoTanarId).Tables[0];
                foreach (DataRow tanmenetItem in tanmenetItemDt.Rows)
                {
                    tanmenetItems.Add(new TanmenetItemGetResponseCo
                    {
                        Id = tanmenetItem.Field<int>("ID"),
                        EvesOraszam = tanmenetItem.Field<int>("Oraszam"),
                        Tema = tanmenetItem.Field<string>("Tema"),
                        Megjegyzes = tanmenetItem.Field<string>("Megjegyzes"),
                        Nev = tanmenetItem.Field<string>("Nev"),
                        RovidNev = tanmenetItem.Field<string>("RovidNev")
                    });
                }

                response.Add(new TanmenetGetResponseCo
                {
                    OsztalyCsoportId = tanmenetKey.OsztalyCsoportId,
                    TantargyId = tanmenetKey.TantargyId,
                    FeltoltoTanarId = tanmenetKey.FeltoltoTanarId,
                    Items = tanmenetItems
                });
            }

            return response;
        }
    }
}