using SchoolContracts.BindingModels;
using SchoolContracts.SearchModels;
using SchoolContracts.StoragesContracts;
using SchoolContracts.ViewModels;
using SchoolDatabaseImplement.Models;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Design;
using Microsoft.EntityFrameworkCore.Query;

namespace SchoolDatabaseImplement.Implements
{
    public class AccountStorage : IAccountStorage
    {
        private static IIncludableQueryable<Account, Student?> Accounts(SchoolDB context)
            => context.Accounts
                .Include(x => x.StudentByDiscipline).ThenInclude(x => x.Discipline)
                .Include(x => x.StudentByDiscipline).ThenInclude(x => x.Student);

        public List<AccountViewModel> GetFullList()
        {
            using var context = new SchoolDB();
            return Accounts(context)
                .Select(x => (AccountViewModel)x)
                .ToList();
        }

        public List<AccountViewModel> GetFilteredList(AccountSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model), "Получена пустая поисковая модель");
            }

            if (model.DateFrom.HasValue && !model.DateTo.HasValue || model.DateTo.HasValue && !model.DateFrom.HasValue)
            {
                throw new ArgumentException("Получена поисковая модель только с началом или концом периода");
            }
            if (!model.DateFrom.HasValue && !model.StudentId.HasValue)
            {
                throw new ArgumentNullException(nameof(model.StudentId), "Получена поисковая модель без StudentId");

            }
            if (!model.DateFrom.HasValue && !model.DisciplineId.HasValue)
            {
                throw new ArgumentNullException(nameof(model.DisciplineId), "Получена поисковая модель без DisciplineId");
            }
            using var context = new SchoolDB();
            if (model.DateFrom.HasValue)
            {
                return Accounts(context)
                    .Where(x => model.DateFrom.Value <= x.DateOfAccount && x.DateOfAccount <= model.DateTo.Value)
                    .Select(x => (AccountViewModel)x)
                    .ToList();
            }

            return Accounts(context)
                .Where(x => x.SchoolByDiscipline != null &&
                            x.SchoolByDiscipline.StudentId == model.StudentId &&
                            x.SchoolByDiscipline.DisciplineId == model.DisciplineId)
                .Select(x => (AccountViewModel)x)
                .ToList();
        }
        public AccountViewModel? GetElement(AccountSearchModel model)
        {
            using var context = new SchoolDB();
            return Accounts(context)
                .FirstOrDefault(x => (model.Id.HasValue && x.Id == model.Id));
        }
        public AccountViewModel? Insert(AccountBindingModel model)
        {
            if (model == null)
            {
                return null;
            }
            var newAccount = Account.Create(model);
            using var context = new SchoolDB();
            context.Accounts.Add(newAccount);
            context.SaveChanges();
            return newAccount;
        }
    }
}