using BeautySaloonContracts.BindingModels;
using BeautySaloonContracts.ViewModels;
using BeautySaloonDataModels;
using System.ComponentModel.DataAnnotations.Schema;

namespace BeautySaloonDatabaseImplement;

/// <summary>
/// Сущность заказы
/// </summary>
public partial class Order : IOrderModel
{
    /// <summary>
    /// Уникальный идентификатор
    /// </summary>
    public int Id { get; set; }

    /// <summary>
    /// Дата
    /// </summary>
    public DateOnly Date { get; set; }

    /// <summary>
    /// Сумма
    /// </summary>
    public decimal Sum { get; set; }

    /// <summary>
    /// Идентификатор клиента
    /// </summary>
    public int ClientId { get; set; }

    /// <summary>
    /// Идентификатор сотрудника
    /// </summary>
    public int EmployeeId { get; set; }

    public virtual Client Client { get; set; } = null!;

    public virtual Employee Employee { get; set; } = null!;

    public virtual List<ServiceOrder> ServiceOrders { get; set; } = new List<ServiceOrder>();

    public Dictionary<int, (TimeOnly, IServiceModel, int)> _orderServices = null;
    
    public Dictionary<int, (TimeOnly, IServiceModel, int)> OrderServices
    {
        get
        {
            if (_orderServices == null)
            {
                _orderServices = ServiceOrders
                            .ToDictionary(recPC => recPC.ServiceId, 
                            recPC => (recPC.Date, recPC.Service as IServiceModel, recPC.EmployeeId));
            }
            return _orderServices;
        }
    }

    public static Order? Create(NewdbContext context, OrderBindingModel? model)
    {
        if (model == null)
        {
            return null;
        }
        return new Order()
        {
            Id = model.Id,
            Date = model.Date,
            Sum = model.Sum,
            ClientId = model.ClientId,
            EmployeeId = model.EmployeeId,
            ServiceOrders = model.OrderServices.Select(x => new ServiceOrder
            {
                Service = context.Services.First(y => y.Id == x.Key),
                Date = x.Value.Item1,
                EmployeeId = x.Value.Item3,
            }).ToList()
        };
    }

    public void Update(OrderBindingModel model)
    {
        Date = model.Date;
        Sum = model.Sum;
        EmployeeId = model.EmployeeId;
        ClientId = model.ClientId;
    }

    public OrderViewModel GetViewModel => new()
    {
        Id = Id,
        Date = Date,
        Sum = Sum,
        ClientId = ClientId,
        EmployeeId = EmployeeId,
        ClientName = Client.Name + " " + Client.Surname + " " + Client.Patronymic,
        EmployeeName = Employee.Name + " " + Employee.Surname + " " + Employee.Patronymic,
        ClientPhone = Client.Phone,
        EmployeePhone = Employee.Phone
    };

    public void UpdateServices(NewdbContext context, OrderBindingModel model)
    {
        var orderServices = context.ServiceOrders
            .Where(rec => rec.OrderId == model.Id).ToList();

        if (orderServices != null && orderServices.Count > 0)
        {   // удалили те, которых нет в модели
            context.ServiceOrders
                .RemoveRange(orderServices
                .Where(rec => !model.OrderServices.ContainsKey(rec.ServiceId)));
            context.SaveChanges();
            // обновили данные у существующих записей
            foreach (var updateService in orderServices)
            {
                updateService.Date = model.OrderServices[updateService.ServiceId].Item1;
                updateService.EmployeeId = 
                    model.OrderServices[updateService.ServiceId].Item3;
                model.OrderServices.Remove(updateService.ServiceId);
            }
            context.SaveChanges();
        }
        var order = context.Orders.First(x => x.Id == Id);
        foreach (var os in model.OrderServices)
        {
            context.ServiceOrders.Add(new ServiceOrder
            {
                Order = order,
                Service = context.Services.First(x => x.Id == os.Key),
                Date = os.Value.Item1,
                EmployeeId = os.Value.Item3
            });
            context.SaveChanges();
        }
        _orderServices = null;
    }
}