using System;
using System.Collections.Generic;

namespace Svrnty.CQRS.Events.Abstractions.Configuration;

/// <summary>
/// Represents all configuration for a single stream.
/// </summary>
public class StreamConfiguration
{
    /// <summary>
    /// Gets or sets the unique stream name.
    /// </summary>
    public required string StreamName { get; set; }

    /// <summary>
    /// Gets or sets the optional description of the stream.
    /// </summary>
    public string? Description { get; set; }

    /// <summary>
    /// Gets or sets optional tags for categorizing and filtering streams.
    /// </summary>
    public Dictionary<string, string>? Tags { get; set; }

    /// <summary>
    /// Gets or sets the retention configuration for this stream.
    /// </summary>
    public RetentionConfiguration? Retention { get; set; }

    /// <summary>
    /// Gets or sets the dead letter queue configuration for this stream.
    /// </summary>
    public DeadLetterQueueConfiguration? DeadLetterQueue { get; set; }

    /// <summary>
    /// Gets or sets the lifecycle configuration for this stream.
    /// </summary>
    public LifecycleConfiguration? Lifecycle { get; set; }

    /// <summary>
    /// Gets or sets the performance configuration for this stream.
    /// </summary>
    public PerformanceConfiguration? Performance { get; set; }

    /// <summary>
    /// Gets or sets the access control configuration for this stream.
    /// </summary>
    public AccessControlConfiguration? AccessControl { get; set; }

    /// <summary>
    /// Gets or sets when this configuration was created.
    /// </summary>
    public DateTimeOffset CreatedAt { get; set; }

    /// <summary>
    /// Gets or sets when this configuration was last updated.
    /// </summary>
    public DateTimeOffset? UpdatedAt { get; set; }

    /// <summary>
    /// Gets or sets who created this configuration.
    /// </summary>
    public string? CreatedBy { get; set; }

    /// <summary>
    /// Gets or sets who last updated this configuration.
    /// </summary>
    public string? UpdatedBy { get; set; }

    /// <summary>
    /// Validates the stream configuration.
    /// </summary>
    /// <exception cref="ArgumentException">Thrown when configuration is invalid.</exception>
    public void Validate()
    {
        if (string.IsNullOrWhiteSpace(StreamName))
            throw new ArgumentException("StreamName cannot be null or whitespace", nameof(StreamName));

        Retention?.Validate();
        DeadLetterQueue?.Validate();
        Lifecycle?.Validate();
        Performance?.Validate();
        AccessControl?.Validate();
    }
}