using DeepDrftPublic.Client.Common;

namespace DeepDrftPublic.Client.Services;

/// <summary>
/// Shared cookie contract for the public-site settings seam (Phase 18 wave 18.6), the analogue of
/// <see cref="DarkModeServiceBase"/>. Holds the cookie names and the (de)serialization for each preference
/// so the server prerender-read service and the client cookie-write service agree on one wire format —
/// the load-bearing reason this is shared rather than duplicated. Each new preference adds its cookie name
/// and a parse/format pair here, keeping the round-trip in one place.
/// </summary>
public abstract class SettingsServiceBase
{
    protected const string StreamQualityCookieName = "streamQuality";

    /// <summary>
    /// Parses the <c>streamQuality</c> cookie value into <see cref="StreamQuality"/>, defaulting to
    /// <see cref="StreamQuality.LowData"/> (the OQ2 default) for an absent, empty, or unrecognized value so
    /// a missing/garbled cookie never produces a surprising preference.
    /// </summary>
    protected static StreamQuality ParseStreamQuality(string? cookieValue) =>
        Enum.TryParse<StreamQuality>(cookieValue, ignoreCase: true, out var parsed)
            ? parsed
            : StreamQuality.LowData;

    /// <summary>Formats a <see cref="StreamQuality"/> for cookie storage (round-trips with <see cref="ParseStreamQuality"/>).</summary>
    protected static string FormatStreamQuality(StreamQuality quality) => quality.ToString();
}