namespace Jellyfin.Plugin.JRay.Configuration;

/// <summary>
/// How far a configured manifest server is trusted. See the JRay public server
/// specification, §9 "Trusting third-party servers".
/// </summary>
public enum ServerTrustLevel
{
    /// <summary>
    /// Accept manifests, but never contribute to this server and never send
    /// library inventory beyond the single item being queried. The default for
    /// user-added servers.
    /// </summary>
    FetchOnly = 0,

    /// <summary>
    /// Eligible to contribute to, subject to <see cref="ManifestServer.AllowContribute"/>.
    /// </summary>
    Full = 1,
}

/// <summary>
/// The minimum cut-match tier a fetched manifest must reach before it is stored.
/// See the public server specification, §3 "Cut matching".
/// </summary>
/// <remarks>
/// Every tier is a claim about a <em>cut</em>, never about a copy. There is no
/// file-level tier, and the plugin sends no <c>video_hash</c>.
/// <para>
/// <b>The <c>Exact</c> tier was withdrawn for legal reasons; do not re-add it
/// without an explicit, recorded agreement.</b> It keyed on the OpenSubtitles
/// file hash, which identifies the individual encode a user holds rather than
/// the edit the timings describe. A TMDB id discloses "some copy of this film";
/// a file hash discloses "<em>this exact release</em>", which turns a catalogue
/// lookup into a release-identification service and turns the server's database
/// into a mapping from file fingerprints to the instances holding them. That is
/// a far more specific disclosure than PR-005 permits, and a dataset no
/// volunteer operator should be holding.
/// </para>
/// <para>
/// The audio signature is the deliberate replacement: derived from content, it
/// identifies the <em>cut</em>, so two different encodes of the same edit agree.
/// It answers the question the exchange needs — "do these timings apply to this
/// media?" — without answering the one it must not. <c>Audio</c> is therefore
/// the top tier here.
/// </para>
/// </remarks>
public enum MatchTier
{
    /// <summary>Audio 0.60–0.85, or runtimes within ±30s. Surfaced as a caveat in the UI.</summary>
    Loose = 0,

    /// <summary>Runtimes within ±2s.</summary>
    Runtime = 1,

    /// <summary>Audio signature score ≥ 0.85; may carry a non-zero offset. The top tier.</summary>
    Audio = 2,
}

/// <summary>
/// One entry in the ordered list of manifest servers the plugin queries
/// (public server specification, §9 "Multiple servers").
/// </summary>
/// <remarks>
/// The list is ordered because order *is* the user's trust ranking, made
/// explicit: for a fetch, servers are tried in order and the first acceptable
/// result wins. Querying every server for every item would multiply egress and
/// leak the library to more parties.
///
/// <c>FetchOnly</c> is the default for user-added servers. Adding a third-party
/// server means trusting its operator not to serve deliberately wrong actor
/// data — the client-side controls bound the damage to bad overlay content,
/// they cannot make wrong data right.
/// </remarks>
// TRACES: JR-025 | PR-005, PR-006
public class ManifestServer
{
    /// <summary>
    /// Initializes a new instance of the <see cref="ManifestServer"/> class.
    /// </summary>
    public ManifestServer()
    {
        Url = string.Empty;
        Name = string.Empty;
        Token = string.Empty;
        Enabled = false;
        AllowContribute = false;
        TrustLevel = ServerTrustLevel.FetchOnly;
    }

    /// <summary>
    /// Gets or sets the base URL of the server, e.g. "https://jray.tourolle.paris".
    /// HTTPS is required for non-loopback servers: a plaintext server would let
    /// any network intermediary rewrite actor overlays.
    /// </summary>
    public string Url { get; set; }

    /// <summary>
    /// Gets or sets the display label shown in the configuration page.
    /// </summary>
    public string Name { get; set; }

    /// <summary>
    /// Gets or sets the API token used to contribute manifests. Optional —
    /// required only to contribute, never to fetch. This is an anonymous bearer
    /// capability rather than an account (public server specification, §5a).
    /// </summary>
    public string Token { get; set; }

    /// <summary>
    /// Gets or sets a value indicating whether this server is queried at all.
    /// Lets an admin disable an entry without deleting it and losing its token.
    /// </summary>
    public bool Enabled { get; set; }

    /// <summary>
    /// Gets or sets a value indicating whether locally generated manifests may be
    /// contributed to this server. Independent of fetching, and off by default:
    /// contribution is never fanned out, because broadcasting uploads to every
    /// configured server would multiply privacy exposure without the user
    /// intending it.
    /// </summary>
    public bool AllowContribute { get; set; }

    /// <summary>
    /// Gets or sets how far this server is trusted.
    /// </summary>
    public ServerTrustLevel TrustLevel { get; set; }
}