using System;

namespace StellaOps.TimelineIndexer.Infrastructure.Options;

/// <summary>
/// Configuration for timeline ingestion transports (NATS, Redis).
/// </summary>
public sealed class TimelineIngestionOptions
{
    public NatsIngestionOptions Nats { get; init; } = new();
    public RedisIngestionOptions Redis { get; init; } = new();
}

public sealed class NatsIngestionOptions
{
    /// <summary>
    /// Enables NATS subscription when true.
    /// </summary>
    public bool Enabled { get; init; }

    /// <summary>
    /// NATS server URL (e.g., nats://localhost:4222).
    /// </summary>
    public string Url { get; init; } = "nats://localhost:4222";

    /// <summary>
    /// Subject to subscribe to for orchestrator events.
    /// </summary>
    public string Subject { get; init; } = "orch.event";

    /// <summary>
    /// Queue group for shared subscriptions to preserve ordering per subject.
    /// </summary>
    public string QueueGroup { get; init; } = "timeline-indexer";

    /// <summary>
    /// Maximum in-flight messages per subscriber.
    /// </summary>
    public int Prefetch { get; init; } = 64;
}

public sealed class RedisIngestionOptions
{
    /// <summary>
    /// Enables Redis Stream subscription when true.
    /// </summary>
    public bool Enabled { get; init; }

    /// <summary>
    /// Redis connection string (e.g., localhost:6379 or rediss://...).
    /// </summary>
    public string ConnectionString { get; init; } = "localhost:6379";

    /// <summary>
    /// Stream name carrying timeline events.
    /// </summary>
    public string Stream { get; init; } = "timeline.events";

    /// <summary>
    /// Consumer group used for ordered consumption.
    /// </summary>
    public string ConsumerGroup { get; init; } = "timeline-indexer";

    /// <summary>
    /// Consumer name used when reading from the group.
    /// </summary>
    public string ConsumerName { get; init; } = Environment.MachineName ?? "timeline-indexer";

    /// <summary>
    /// Field that contains the JSON payload within the stream entry.
    /// </summary>
    public string ValueField { get; init; } = "data";

    /// <summary>
    /// Maximum entries fetched per polling iteration.
    /// </summary>
    public int MaxBatchSize { get; init; } = 128;

    /// <summary>
    /// Polling interval in milliseconds when no entries are available.
    /// </summary>
    public int PollIntervalMilliseconds { get; init; } = 250;
}