using DigitalData.EmailProfiler.Application.EmailProcessing.Commands;
using FluentValidation;

namespace DigitalData.EmailProfiler.Application.EmailProcessing.Validators;

/// <summary>
/// Validator for ProcessEmailCommand.
/// </summary>
public class ProcessEmailCommandValidator : AbstractValidator<ProcessEmailCommand>
{
    public ProcessEmailCommandValidator()
    {
        RuleFor(x => x.ProfileId)
            .GreaterThan(0).WithMessage("Profile ID must be greater than 0");

        RuleFor(x => x.MessageId)
            .NotEmpty().WithMessage("Message ID is required")
            .MaximumLength(500).WithMessage("Message ID must not exceed 500 characters");

        RuleFor(x => x.Sender)
            .NotEmpty().WithMessage("Sender is required")
            .MaximumLength(200).WithMessage("Sender must not exceed 200 characters")
            .EmailAddress().WithMessage("Sender must be a valid email address");

        RuleFor(x => x.Subject)
            .NotEmpty().WithMessage("Subject is required")
            .MaximumLength(500).WithMessage("Subject must not exceed 500 characters");

        RuleFor(x => x.ReceivedDate)
            .NotEmpty().WithMessage("Received date is required")
            .LessThanOrEqualTo(DateTime.Now.AddDays(1)).WithMessage("Received date cannot be in the future");

        RuleFor(x => x.Attachments)
            .NotNull().WithMessage("Attachments collection cannot be null");

        RuleForEach(x => x.Attachments).ChildRules(attachment =>
        {
            attachment.RuleFor(a => a.FileName)
                .NotEmpty().WithMessage("Attachment file name is required")
                .MaximumLength(500).WithMessage("Attachment file name must not exceed 500 characters");

            attachment.RuleFor(a => a.Content)
                .NotEmpty().WithMessage("Attachment content is required");

            attachment.RuleFor(a => a.SizeBytes)
                .GreaterThan(0).WithMessage("Attachment size must be greater than 0")
                .LessThanOrEqualTo(100 * 1024 * 1024).WithMessage("Attachment size must not exceed 100 MB");
        });
    }
}