using System;

namespace Svrnty.CQRS.Events.Abstractions.Configuration;

/// <summary>
/// Configuration for stream retention policies.
/// </summary>
public class RetentionConfiguration
{
    /// <summary>
    /// Gets or sets the maximum age of events before cleanup.
    /// </summary>
    public TimeSpan? MaxAge { get; set; }

    /// <summary>
    /// Gets or sets the maximum total size in bytes before cleanup.
    /// </summary>
    public long? MaxSizeBytes { get; set; }

    /// <summary>
    /// Gets or sets the maximum number of events before cleanup.
    /// </summary>
    public long? MaxEventCount { get; set; }

    /// <summary>
    /// Gets or sets whether to enable table partitioning for this stream.
    /// </summary>
    public bool? EnablePartitioning { get; set; }

    /// <summary>
    /// Gets or sets the partition interval (e.g., daily, weekly, monthly).
    /// </summary>
    public TimeSpan? PartitionInterval { get; set; }

    /// <summary>
    /// Validates the retention configuration.
    /// </summary>
    /// <exception cref="ArgumentException">Thrown when configuration is invalid.</exception>
    public void Validate()
    {
        if (MaxAge.HasValue && MaxAge.Value <= TimeSpan.Zero)
            throw new ArgumentException("MaxAge must be positive", nameof(MaxAge));

        if (MaxSizeBytes.HasValue && MaxSizeBytes.Value <= 0)
            throw new ArgumentException("MaxSizeBytes must be positive", nameof(MaxSizeBytes));

        if (MaxEventCount.HasValue && MaxEventCount.Value <= 0)
            throw new ArgumentException("MaxEventCount must be positive", nameof(MaxEventCount));

        if (PartitionInterval.HasValue && PartitionInterval.Value <= TimeSpan.Zero)
            throw new ArgumentException("PartitionInterval must be positive", nameof(PartitionInterval));
    }
}