using ConstructionCompanyContracts.BindingModels;
using ConstructionCompanyContracts.BusinessLogicContracts;
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 MaterialOrderStorage : IMaterialOrderStorage
    {
        private readonly ConstructionCompanyDatabase _source;
        public MaterialOrderStorage()
        {
            _source = ConstructionCompanyDatabase.GetInstance();
        }
        public List<MaterialOrderViewModel> GetFullList()
        {
            List<MaterialOrderViewModel> result = new List<MaterialOrderViewModel>();
            foreach (var material in _source.MaterialOrders)
            {
                result.Add(material.GetViewModel);
            }
            return result;
        }

        public List<MaterialOrderViewModel> GetFilteredList(MaterialOrderSearchModel model)
        {
            if (model == null || !model.OrderId.HasValue || !model.MaterialId.HasValue)
            {
                return new();
            }
            List<MaterialOrderViewModel> result = new List<MaterialOrderViewModel>();
            foreach (var material in _source.MaterialOrders)
            {
                if (material.MaterialId == model.MaterialId && material.OrderId == model.OrderId) result.Add(material.GetViewModel);
            }
            return result;
        }

        public MaterialOrderViewModel? GetElement(MaterialOrderSearchModel model)
        {
            if (model == null || !model.OrderId.HasValue || !model.MaterialId.HasValue)
            {
                return new();
            }
            return _source.MaterialOrders.FirstOrDefault(x => x.MaterialId == model.MaterialId && x.OrderId == model.OrderId)?.GetViewModel;
        }

        public MaterialOrderViewModel? Insert(MaterialOrderBindingModel model)
        {
            var command = MaterialOrder.CreateCommand(model);
            if (string.IsNullOrEmpty(command))
            {
                return null;
            }
            _source.ExecuteSql(command);
            var newMaterialOrder = _source.MaterialOrders[_source.MaterialOrders.Count - 1];
            return newMaterialOrder.GetViewModel;
        }

        public MaterialOrderViewModel? Delete(MaterialOrderBindingModel model)
        {
            var command = MaterialOrder.DeleteCommand(model);
            if (string.IsNullOrEmpty(command))
            {
                return null;
            }
            var deletedMaterialOrder = _source.MaterialOrders.First(x => x.MaterialId == model.MaterialId && x.OrderId == model.OrderId).GetViewModel;
            _source.ExecuteSql(command);
            return deletedMaterialOrder;
        }
    }
}