namespace LiteCharms.Features.Utilities.Commands;

public class SendEmailCommand : IRequest<Result>
{
    public string? From { get; set; }

    public string? SenderName { get; set; }

    public string? To { get; set; }

    public string? RecipientName { get; set; }

    public string? Subject { get; set; }

    public string? Message { get; set; }

    public bool IsHtml { get; set; }

    public Stream? Attachment { get; set; }

    public string? AttachmentFileName { get; set; }

    private SendEmailCommand(string from, string senderName, string to, string recipientName, string subject, string message, bool isHtml = false, Stream? attachment = null, string? attachmentFileName = null)
    {
        From = from;
        To = to;
        Subject = subject;
        Message = message;
        IsHtml = isHtml;
        Attachment = attachment;
        AttachmentFileName = attachmentFileName;
        SenderName = senderName;
        RecipientName = recipientName;
    }

    public static SendEmailCommand Create(string from, string senderName, string to, string recipientName, string subject, string message, bool isHtml = false, Stream? attachment = null, string? attachmentFileName = null)
    {
        if (string.IsNullOrWhiteSpace(from))
            throw new ArgumentException("From address is required.");

        if (string.IsNullOrWhiteSpace(senderName))
            throw new ArgumentException("Sender name is required.");

        if (!string.IsNullOrWhiteSpace(senderName) && senderName?.Length > 255)
            throw new ArgumentException("Sender name cannot exceed 255 characters.");

        if (string.IsNullOrWhiteSpace(to))
            throw new ArgumentException("To address is required.");

        if (string.IsNullOrWhiteSpace(recipientName))
            throw new ArgumentException("Recipient name is required.");

        if (!string.IsNullOrWhiteSpace(recipientName) && recipientName?.Length > 255)
            throw new ArgumentException("Recipient name cannot exceed 255 characters.");

        if (string.IsNullOrWhiteSpace(subject))
            throw new ArgumentException("Subject is required.");

        if (!string.IsNullOrWhiteSpace(subject) && subject?.Length > 2048)
            throw new ArgumentException("Subject cannot exceed 2048 characters.");

        if (string.IsNullOrWhiteSpace(message))
            throw new ArgumentException("Message is required.");

        if (message.Length > 10485760)
            throw new ArgumentException("Message cannot exceed 10 MB.");

        if (attachment != null && string.IsNullOrWhiteSpace(attachmentFileName))
            throw new ArgumentException("Attachment file name must be provided when an attachment is included.");

        if (attachment is not null && attachment.Length > 10485760)
            throw new ArgumentException("Attachment cannot exceed 10 MB.");

        if (!string.IsNullOrWhiteSpace(attachmentFileName) && attachmentFileName.Length > 255)
            throw new ArgumentException("Attachment file name cannot exceed 255 characters.");

        return new(from, senderName!, to, recipientName!, subject!, message, isHtml, attachment, attachmentFileName);
    }
}