using EmployeeManagmentContracts.SearchModels;
using EmployeeManagmentContracts.StoragesContracts;
using EmployeeManagmentContracts.ViewModels;
using EmployeeManagmentDataBaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;

namespace EmployeeManagmentDataBaseImplement.Implements
{
    public class VacationStorage : IVacationStorage
    {
        public List<VacationViewModel> GetFullList()
        {
            using var context = new EmployeeManagementDbContext();

            return context.Vacations
                .Select(v => new VacationViewModel
                {
                    Id = v.Id,
                    StartData = v.StartData,
                    EndData = v.EndData,
                    Passed = v.Passed,
                    EmployeeId = v.EmployeesId,
                    EmployeeName = v.Employee != null ? $"{v.Employee.PhisicalPerson.Surname} {v.Employee.PhisicalPerson.Name} {v.Employee.PhisicalPerson.Patronymic} ({v.Employee.NameJob})" : "Не указано"
                    
                })
                .ToList();
        }

        public List<VacationViewModel> GetFilteredList(VacationSearchModel model)
        {
            using var context = new EmployeeManagementDbContext();

            if (model == null) return new List<VacationViewModel>();

            return context.Vacations
                .Where(v =>
                    (!model.StartData.HasValue || v.StartData >= model.StartData) &&
                    (!model.EndData.HasValue || v.EndData <= model.EndData))
                .Select(v => new VacationViewModel
                {
                    Id = v.Id,
                    StartData = v.StartData,
                    EndData = v.EndData,
                    Passed = v.Passed,
                    EmployeeId = v.EmployeesId,
                    EmployeeName = v.Employee != null ? $"{v.Employee.PhisicalPerson.Surname} {v.Employee.PhisicalPerson.Name} {v.Employee.PhisicalPerson.Patronymic} ({v.Employee.NameJob})" : "Не указано"
                })
                .ToList();
        }

        public VacationViewModel? GetElement(int id)
        {
            using var context = new EmployeeManagementDbContext();

            var entity = context.Vacations
                .FirstOrDefault(v => v.Id == id);

            return entity == null ? null : new VacationViewModel
            {
                Id = entity.Id,
                StartData = entity.StartData,
                EndData = entity.EndData,
                Passed = entity.Passed,
                EmployeeId = entity.EmployeesId,
                EmployeeName = entity.Employee != null ? $"{entity.Employee.PhisicalPerson.Surname} {entity.Employee.PhisicalPerson.Name} {entity.Employee.PhisicalPerson.Patronymic} ({entity.Employee.NameJob})" : "Не указано"
            };
        }

        public void Insert(VacationViewModel model)
        {
            using var context = new EmployeeManagementDbContext();

            var newVacation = new Vacation
            {
                StartData = model.StartData,
                EndData = model.EndData,
                Passed = model.Passed,
                EmployeesId = model.EmployeeId
            };

            context.Vacations.Add(newVacation);
            context.SaveChanges();
        }

        public void Update(VacationViewModel model)
        {
            using var context = new EmployeeManagementDbContext();

            var entity = context.Vacations.FirstOrDefault(v => v.Id == model.Id);

            if (entity != null)
            {
                entity.StartData = model.StartData;
                entity.EndData = model.EndData;
                entity.Passed = model.Passed;
                entity.EmployeesId = model.EmployeeId;

                context.SaveChanges();
            }
        }

        public void Delete(int id)
        {
            using var context = new EmployeeManagementDbContext();

            var entity = context.Vacations.FirstOrDefault(v => v.Id == id);

            if (entity != null)
            {
                context.Vacations.Remove(entity);
                context.SaveChanges();
            }
        }
    }
}