using CH.CQRS.Service.Energy;
using CH.CQRS.Service.Energy.Options;
using CH.Dal;
using CH.Dal.DbEntity;
using CH.Dal.Validators;
using CH.Enum;
using FluentValidation;
using Microsoft.EntityFrameworkCore;
using OpenHarbor.CQRS.Abstractions;

namespace CH.CQRS.Command.Energy;

public class CreateEnergyRateCommand
{
  public long ProviderId { get; set; }
  public required string Name { get; set; }
  public decimal Price { get; set; }
  public Currency Currency { get; set; }
  public bool Active { get; set; }
}
public class CreateEnergyRateCommandHandler(EnergyService energyService) : ICommandHandler<CreateEnergyRateCommand>
{
  public Task HandleAsync(CreateEnergyRateCommand command, CancellationToken cancellationToken = new CancellationToken())
  {
    return energyService.CreateEnergyRateAsync(new CreateEnergyRateCommandOptions
    {
      ProviderId = command.ProviderId,
      Name = command.Name,
      Price = command.Price,
      Currency = command.Currency,
      Active = command.Active
    },cancellationToken);
  }
}

public class CreateEnergyRateCommandValidator : AbstractValidator<CreateEnergyRateCommand>
{
  public CreateEnergyRateCommandValidator(CHDbContext dbContext)
  {
    RuleFor(command => command.Name)
      .NotEmpty()
      .MinimumLength(3)
      .MustAsync(async (name, cancellationToken) =>
      {
        var nameInUse = await dbContext.EnergyRates.AnyAsync(energyRate => energyRate.Name == name, cancellationToken);
        return false == nameInUse;
      })
      .WithMessage("This Name is already in use by another energy rate.");
    RuleFor(command => command.Price).GreaterThanOrEqualTo(0);
    RuleFor(command => command.ProviderId)
      .NotEmpty()
      .SetValidator(new DbEntityExistValidator<EnergyProvider,long>(dbContext))
      .WithMessage("The provided provider Id is invalid.");
  }
}