using System;
using Svrnty.CQRS.Events.Abstractions.Streaming;
using Svrnty.CQRS.Events.Abstractions.Subscriptions;

namespace Svrnty.CQRS.Events.Abstractions.Configuration;

/// <summary>
/// Default implementation of remote stream configuration.
/// </summary>
public sealed class RemoteStreamConfiguration : IRemoteStreamConfiguration
{
    /// <summary>
    /// Initializes a new instance of the <see cref="RemoteStreamConfiguration"/> class.
    /// </summary>
    /// <param name="streamName">The name of the remote stream.</param>
    public RemoteStreamConfiguration(string streamName)
    {
        if (string.IsNullOrWhiteSpace(streamName))
            throw new ArgumentException("Stream name cannot be null or whitespace.", nameof(streamName));

        StreamName = streamName;
    }

    /// <inheritdoc />
    public string StreamName { get; }

    /// <inheritdoc />
    public string ProviderType { get; set; } = "RabbitMQ";

    /// <inheritdoc />
    public string ConnectionString { get; set; } = string.Empty;

    /// <inheritdoc />
    public SubscriptionMode Mode { get; set; } = SubscriptionMode.ConsumerGroup;

    /// <inheritdoc />
    public bool AutoDeclareTopology { get; set; } = true;

    /// <inheritdoc />
    public int PrefetchCount { get; set; } = 10;

    /// <inheritdoc />
    public AcknowledgmentMode AcknowledgmentMode { get; set; } = AcknowledgmentMode.Auto;

    /// <inheritdoc />
    public int MaxRedeliveryAttempts { get; set; } = 3;

    /// <inheritdoc />
    public void Validate()
    {
        if (string.IsNullOrWhiteSpace(StreamName))
            throw new InvalidOperationException("StreamName cannot be null or whitespace.");

        if (string.IsNullOrWhiteSpace(ProviderType))
            throw new InvalidOperationException("ProviderType must be specified.");

        if (string.IsNullOrWhiteSpace(ConnectionString))
            throw new InvalidOperationException("ConnectionString must be specified.");

        if (PrefetchCount <= 0)
            throw new InvalidOperationException("PrefetchCount must be positive.");

        if (MaxRedeliveryAttempts < 0)
            throw new InvalidOperationException("MaxRedeliveryAttempts cannot be negative.");
    }
}