using Microsoft.EntityFrameworkCore;
using SchoolContracts.BindingModels;
using SchoolContracts.SearchModel;
using SchoolContracts.StoragesContracts;
using SchoolContracts.ViewModels;
using SchoolDatabaseImplement;
using SchoolDatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SchoolDatabaseImplements.Implements
{
	public class CircleExpenseStorage : ICircleExpenseStorage
	{
		public CircleExpenseViewModel? Delete(CircleExpenseBindingModel model)
		{
			using var context = new SchoolDatabase();
			var circleExpense = context.CircleExpenses.FirstOrDefault(rec => rec.Id == model.Id);
			if (circleExpense != null)
			{
				context.CircleExpenses.Remove(circleExpense);
				context.SaveChanges();
				return circleExpense.GetViewModel;
			}
			return null;
		}

		public CircleExpenseViewModel GetElement(CircleExpenseSearchModel model)
		{
			if (model == null)
			{
				return null;
			}
			using var context = new SchoolDatabase();
			if (model.Id.HasValue)
			{
				return context.CircleExpenses.Include(x => x.Circle)
					.Include(x => x.Expense)
					.FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
			}
			return null;
		}

		public List<ReportExpensesInCirclesViewModel> GetExpensesInCircles(CircleExpenseSearchModel model)
		{
			if (model.DateFrom == null || model.DateTo == null)
			{
				return new();
			}
			using var context = new SchoolDatabase();
			return context.CircleExpenses.Include(x => x.Circle)
					.Include(x => x.Expense)
					.ThenInclude(x => x.Employee)
					.Select(x => new ReportExpensesInCirclesViewModel()
					{
						EmployeeName = x.Expense.Employee.EmployeeName,
						CircleId = x.Circle.Id,
						ExpenseName = x.Expense.ExpenseName,
						Count = x.Expense.Count,
						Sum= x.Expense.Sum
					})
					.ToList();
		}

		public List<CircleExpenseViewModel> GetFilteredList(CircleExpenseSearchModel model)
		{
			using var context = new SchoolDatabase();
			return context.CircleExpenses
				.Where(x => x.Id == model.Id)
				.Include(x => x.Circle)
				.Include(x => x.Expense)
				.Select(x => x.GetViewModel)
				.ToList();
		}

		public List<CircleExpenseViewModel> GetFullList()
		{
			using var context = new SchoolDatabase();
			return context.CircleExpenses
				.Include(x => x.Circle)
				.Include(x => x.Expense)
				.Select(x => x.GetViewModel)
				.ToList();
		}

		public CircleExpenseViewModel? Insert(CircleExpenseBindingModel model)
		{
			using var context = new SchoolDatabase();
			var newCircleExpense = CircleExpense.Create(context, model);
			if (newCircleExpense == null)
			{
				return null;
			}
			context.CircleExpenses.Add(newCircleExpense);
			context.SaveChanges();
			return newCircleExpense.GetViewModel;
		}

		public CircleExpenseViewModel? Update(CircleExpenseBindingModel model)
		{
			using var context = new SchoolDatabase();
			var circleExpense = context.CircleExpenses.FirstOrDefault(x => x.Id == model.Id);
			if (circleExpense == null)
			{
				return null;
			}
			circleExpense.Update(model);
			context.SaveChanges();
			return circleExpense.GetViewModel;
		}
	}
}