using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using Jellyfin.Plugin.JRay.Configuration;

namespace Jellyfin.Plugin.JRay.Services.Interfaces;

/// <summary>
/// Fetches actor-timeline manifests from the configured public servers.
/// </summary>
/// <remarks>
/// Satisfies <c>JRay-public-server</c> UR-007: the plugin queries a configurable,
/// <b>ordered</b> list of servers, and the first result clearing the configured
/// match tier wins.
/// </remarks>
// TRACES: JR-025 | PR-006
public interface IManifestExchangeClient
{
    /// <summary>
    /// Fetches a movie manifest from the first server that has an acceptable one.
    /// </summary>
    /// <param name="servers">The configured servers, in trust order.</param>
    /// <param name="minimumTier">The lowest cut-match tier that may be stored.</param>
    /// <param name="query">Identity and cut parameters for the local item.</param>
    /// <param name="cancellationToken">Cancellation token.</param>
    /// <returns>The accepted manifest, or null when no server had one.</returns>
    Task<ManifestFetchOutcome?> FetchMovieAsync(
        IReadOnlyList<ManifestServer> servers,
        MatchTier minimumTier,
        TitleQuery query,
        CancellationToken cancellationToken);

    /// <summary>
    /// Fetches a single episode manifest.
    /// </summary>
    /// <param name="servers">The configured servers, in trust order.</param>
    /// <param name="minimumTier">The lowest cut-match tier that may be stored.</param>
    /// <param name="query">Identity and cut parameters for the local item.</param>
    /// <param name="cancellationToken">Cancellation token.</param>
    /// <returns>The accepted manifest, or null when no server had one.</returns>
    Task<ManifestFetchOutcome?> FetchEpisodeAsync(
        IReadOnlyList<ManifestServer> servers,
        MatchTier minimumTier,
        TitleQuery query,
        CancellationToken cancellationToken);

    /// <summary>
    /// Per-server reachability and last error, for the configuration page.
    /// </summary>
    /// <param name="servers">The configured servers.</param>
    /// <returns>One status entry per configured server.</returns>
    IReadOnlyList<ServerStatus> GetStatus(IReadOnlyList<ManifestServer> servers);
}