using ConstructionCompanyContracts.BindingModels;
using ConstructionCompanyContracts.SearchModels;
using ConstructionCompanyContracts.StorageContracts;
using ConstructionCompanyContracts.ViewModels;
using ConstructionCompanyPsqlImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConstructionCompanyPsqlImplement.Implements
{
    public class EmployeeOrderStorage : IEmployeeOrderStorage
    {
        private readonly ConstructionCompanyDatabase _source;
        public EmployeeOrderStorage()
        {
            _source = ConstructionCompanyDatabase.GetInstance();
        }
        public List<EmployeeOrderViewModel> GetFullList()
        {
            List<EmployeeOrderViewModel> result = new List<EmployeeOrderViewModel>();
            foreach (var material in _source.EmployeeOrders)
            {
                result.Add(material.GetViewModel);
            }
            return result;
        }

        public List<EmployeeOrderViewModel> GetFilteredList(EmployeeOrderSearchModel model)
        {
            if (model == null || !model.OrderId.HasValue || !model.EmployeeId.HasValue)
            {
                return new();
            }
            List<EmployeeOrderViewModel> result = new List<EmployeeOrderViewModel>();
            foreach (var material in _source.EmployeeOrders)
            {
                if (material.EmployeeId == model.EmployeeId && material.OrderId == model.OrderId) result.Add(material.GetViewModel);
            }
            return result;
        }

        public EmployeeOrderViewModel? GetElement(EmployeeOrderSearchModel model)
        {
            if (model == null || !model.OrderId.HasValue || !model.EmployeeId.HasValue)
            {
                return new();
            }
            return _source.EmployeeOrders.FirstOrDefault(x => x.EmployeeId == model.EmployeeId && x.OrderId == model.OrderId)?.GetViewModel;
        }

        public EmployeeOrderViewModel? Insert(EmployeeOrderBindingModel model)
        {
            var command = EmployeeOrder.CreateCommand(model);
            if (string.IsNullOrEmpty(command))
            {
                return null;
            }
            _source.ExecuteSql(command);
            var newEmployeeOrder = _source.EmployeeOrders[_source.EmployeeOrders.Count - 1];
            return newEmployeeOrder.GetViewModel;
        }

        public EmployeeOrderViewModel? Delete(EmployeeOrderBindingModel model)
        {
            var command = EmployeeOrder.DeleteCommand(model);
            if (string.IsNullOrEmpty(command))
            {
                return null;
            }
            var deletedEmployeeOrder = _source.EmployeeOrders.First(x => x.EmployeeId == model.EmployeeId && x.OrderId == model.OrderId).GetViewModel;
            _source.ExecuteSql(command);
            return deletedEmployeeOrder;
        }
    }
}