using EnvelopeGenerator.Application.Common.Dto.EnvelopeReceiver;
using EnvelopeGenerator.Domain.Constants;
using MediatR;
using Newtonsoft.Json;
using System.Dynamic;

namespace EnvelopeGenerator.Application.Common.Notifications.DocSigned;

/// <summary>
/// 
/// </summary>
/// <param name="Original"></param>
public record DocSignedNotification(EnvelopeReceiverDto Original) : EnvelopeReceiverDto(Original), INotification, ISendMailNotification
{
    /// <summary>
    /// 
    /// </summary>
    public required ExpandoObject Annotations { get; init; }

    /// <summary>
    /// 
    /// </summary>
    public EmailTemplateType TemplateType => EmailTemplateType.DocumentSigned;

    /// <summary>
    /// 
    /// </summary>
    public string EmailAddress => Receiver?.EmailAddress
        ?? throw new InvalidOperationException($"Receiver is null." +
            $"DocSignedNotification:\n{JsonConvert.SerializeObject(this, Format.Json.ForDiagnostics)}");
}

/// <summary>
/// 
/// </summary>
public static class DocSignedNotificationExtensions
{
    /// <summary>
    /// Converts an <see cref="EnvelopeReceiverDto"/> to a <see cref="DocSignedNotification"/>.
    /// </summary>
    /// <param name="dto">The DTO to convert.</param>
    /// <param name="annotations"></param>
    /// <returns>A new <see cref="DocSignedNotification"/> instance.</returns>
    public static DocSignedNotification ToDocSignedNotification(this EnvelopeReceiverDto dto, ExpandoObject annotations)
        => new(dto) { Annotations = annotations };

    /// <summary>
    /// Asynchronously converts a <see cref="Task{EnvelopeReceiverDto}"/> to a <see cref="DocSignedNotification"/>.
    /// </summary>
    /// <param name="dtoTask">The task that returns the DTO to convert.</param>
    /// <param name="annotations"></param>
    /// <returns>A task that represents the asynchronous conversion operation.</returns>
    public static async Task<DocSignedNotification?> ToDocSignedNotification(this Task<EnvelopeReceiverDto?> dtoTask, ExpandoObject annotations)
        => await dtoTask is EnvelopeReceiverDto dto ? new(dto) { Annotations = annotations } : null;
}