using System.ComponentModel.DataAnnotations;
using Microsoft.AspNetCore.Mvc.ModelBinding;

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

public sealed class PushTemplateLanguageEditViewModel : IValidatableObject
{
    [Required, StringLength(10)]
    public string LanguageCode { get; set; } = "";
    [DisplayFormat(ConvertEmptyStringToNull = false)]
    public string Title { get; set; } = "";
    [DisplayFormat(ConvertEmptyStringToNull = false)]
    public string Body { get; set; } = "";
    [Required]
    public string ActionsJson { get; set; } = "{}";
    [BindNever]
    public bool IsPresent { get; set; }
    public bool HasContent => !string.IsNullOrWhiteSpace(Title) || !string.IsNullOrWhiteSpace(Body) || HasActions();

    private bool HasActions()
    {
        try
        {
            var actions = DAL.Abstract.Templates.PushTemplateActionValidation.Parse(ActionsJson);
            return actions.DefaultAction is not null || actions.Buttons.Count > 0;
        }
        catch (DAL.Abstract.Templates.EmailTemplateWriteException) { return true; }
    }

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