using BankContracts.BindingModels;
using BankContracts.SearchModels;
using BankContracts.StoragesContracts;
using BankContracts.ViewModels;
using BankDatabaseImplement.Models;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BankDatabaseImplement.Implements
{
    public class OperatorStorage : IOperatorStorage
    {
        public List<OperatorViewModel> GetFullList()
        {
            using var context = new BankDatabase();
            return context.Operators
            .Select(x => x.GetViewModel)
            .ToList();
        }
        public List<OperatorViewModel> GetFilteredList(OperatorSearchModel model)
        {
            if (!model.Id.HasValue && string.IsNullOrEmpty(model.Login) && string.IsNullOrEmpty(model.Password))
            {
                return new();
            }
            using var context = new BankDatabase();
            if (!string.IsNullOrEmpty(model.Login) && !string.IsNullOrEmpty(model.Password))
            {
                return context.Operators
                            .Where(x => x.Login == model.Login || x.Password == model.Password)
                            .Select(x => x.GetViewModel)
                            .ToList();
            }
            else
            {
                return context.Operators
                            .Where(x => x.Id == model.Id)
                            .Select(x => x.GetViewModel)
                            .ToList();
            }
        }
        public OperatorViewModel? GetElement(OperatorSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return null;
            }
            using var context = new BankDatabase();
            return context.Operators
            .FirstOrDefault(x => x.Id == model.Id)
            ?.GetViewModel;
        }
        public OperatorViewModel? Insert(OperatorBindingModel model)
        {
            using var context = new BankDatabase();
            var newOperator = Operator.Create(model);
            if (newOperator == null)
            {
                return null;
            }
            context.Operators.Add(newOperator);
            context.SaveChanges();
            return newOperator.GetViewModel;
        }
        public OperatorViewModel? Update(OperatorBindingModel model)
        {
            using var context = new BankDatabase();
            var operatorUpd = context.Operators.FirstOrDefault(x => x.Id == model.Id);
            if (operatorUpd == null)
            {
                return null;
            }
            operatorUpd.Update(model);
            context.SaveChanges();
            return operatorUpd.GetViewModel;
        }
        public OperatorViewModel? Delete(OperatorBindingModel model)
        {
            using var context = new BankDatabase();
            var element = context.Operators.FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Operators.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}