using System;
using System.Collections.Generic;

namespace Svrnty.CQRS.Sagas.Abstractions.Messaging;

/// <summary>
/// Message envelope for saga commands sent to remote services.
/// </summary>
public record SagaMessage
{
    /// <summary>
    /// Unique identifier for this message.
    /// </summary>
    public Guid MessageId { get; init; } = Guid.NewGuid();

    /// <summary>
    /// The saga instance ID.
    /// </summary>
    public Guid SagaId { get; init; }

    /// <summary>
    /// Correlation ID for tracing across services.
    /// </summary>
    public Guid CorrelationId { get; init; }

    /// <summary>
    /// Name of the saga step that sent this message.
    /// </summary>
    public string StepName { get; init; } = string.Empty;

    /// <summary>
    /// Fully qualified type name of the command.
    /// </summary>
    public string CommandType { get; init; } = string.Empty;

    /// <summary>
    /// Serialized command payload (JSON).
    /// </summary>
    public string? Payload { get; init; }

    /// <summary>
    /// When the message was created.
    /// </summary>
    public DateTimeOffset Timestamp { get; init; } = DateTimeOffset.UtcNow;

    /// <summary>
    /// Additional headers for the message.
    /// </summary>
    public Dictionary<string, string> Headers { get; init; } = new();

    /// <summary>
    /// Whether this is a compensation command.
    /// </summary>
    public bool IsCompensation { get; init; }
}