using HrynCo.NotificationService.DAL.Abstract.Templates;

namespace HrynCo.NotificationService.Worker.Services.Push;

public sealed record PushChannelTestMessage
{
    public required string Token { get; init; }
    public int Version { get; init; } = 1;
    public Guid? BindingId { get; init; }
    public string? ActionKey { get; init; }
    public string? ButtonLabel { get; init; }

    public string? Validate()
    {
        if (!PushMessageValidator.IsSupportedVersion(Version)) return "Unsupported push payload version. Supported versions are 1 and 2.";
        if (string.IsNullOrWhiteSpace(Token) || Token.Length > 4096 || Token.Any(char.IsWhiteSpace))
            return "Enter a valid recipient FCM token.";
        if (Version == 1) return null;
        if (BindingId is null || BindingId == Guid.Empty) return "Enter the device's current binding ID for the button-format test.";
        try
        {
            PushTemplateActionValidation.Validate(new PushTemplateActions
            {
                DefaultAction = ActionKey,
                Buttons = [new PushTemplateButton { Action = ActionKey!, Label = ButtonLabel! }]
            });
            return null;
        }
        catch (EmailTemplateWriteException) { return "Enter a valid action key and a button label (1–100 characters)."; }
    }
}