using System.ComponentModel.DataAnnotations;

namespace HrynCo.NotificationService.Web.Controllers.Admin.ViewModels;

public sealed class EmailTemplateLanguageEditViewModel : IValidatableObject
{
    [Required, StringLength(10)]
    public string LanguageCode { get; set; } = "";
    [DisplayFormat(ConvertEmptyStringToNull = false)]
    public string Subject { get; set; } = "";
    [DisplayFormat(ConvertEmptyStringToNull = false)]
    public string HtmlBody { get; set; } = "";
    [DisplayFormat(ConvertEmptyStringToNull = false)]
    public string TextBody { get; set; } = "";
    public bool HasContent => !string.IsNullOrWhiteSpace(Subject) || !string.IsNullOrWhiteSpace(HtmlBody) || !string.IsNullOrWhiteSpace(TextBody);

    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
    {
        if (!HasContent)
            yield break;
        if (string.IsNullOrWhiteSpace(Subject))
            yield return new ValidationResult("The Subject field is required for a populated language.", [nameof(Subject)]);
        if (string.IsNullOrWhiteSpace(HtmlBody))
            yield return new ValidationResult("The HtmlBody field is required for a populated language.", [nameof(HtmlBody)]);
        if (string.IsNullOrWhiteSpace(TextBody))
            yield return new ValidationResult("The TextBody field is required for a populated language.", [nameof(TextBody)]);
    }
}