using SVSim.Database.Enums;

namespace SVSim.Database.Repositories.Viewer;

/// <summary>
/// Lightweight profile shape used by chat surfaces (guild_chat, gathering_chat).
/// Fields match the ChatUserDto wire shape.
/// </summary>
public record ChatUserProfile(
    string Name,
    long   EmblemId,
    string CountryCode,
    int    Rank,
    int    DegreeId);

public interface IViewerRepository
{
    Task<Models.Viewer?> GetViewerBySocialConnection(SocialAccountType accountType, ulong socialId);
    Task<Models.Viewer?> GetViewerWithSocials(long id);
    Task<Models.Viewer?> GetViewerByShortUdid(long shortUdid);
    Task<Models.Viewer?> GetViewerByUdid(Guid udid);

    Task<Models.Viewer> RegisterViewer(string displayName, SocialAccountType socialType,
        ulong socialAccountIdentifier, ulong? shortUdid = null);
    Task<Models.Viewer> RegisterAnonymousViewer(Guid udid);
    Task LinkSteamToViewer(long viewerId, ulong steamId);

    /// <summary>
    /// Merges an anonymous viewer (just created by <c>/tool/signup</c> on a fresh UDID)
    /// into a target viewer that the Steam ticket resolved to. Transfers the anonymous
    /// viewer's UDID to the target, then deletes the anonymous viewer.
    /// </summary>
    Task MergeAnonymousViewerInto(long anonymousViewerId, long targetViewerId);

    /// <summary>
    /// Focused load for building a battle-node <c>MatchContext</c>: viewer + Info + Info's
    /// equipped Emblem/Degree nav refs. Read-only (AsNoTracking). Returns null if the viewer
    /// doesn't exist.
    /// </summary>
    Task<Models.Viewer?> LoadForMatchContextAsync(long viewerId);

    /// <summary>Sets Viewer.GuildId to <paramref name="guildId"/>. No-op if the viewer does not exist.</summary>
    Task SetGuildIdAsync(long viewerId, int guildId, CancellationToken ct = default);

    /// <summary>Clears Viewer.GuildId to null. No-op if the viewer does not exist.</summary>
    Task ClearGuildIdAsync(long viewerId, CancellationToken ct = default);

    /// <summary>
    /// Batch-loads <c>DisplayName</c> for a set of viewer ids. Returns a dictionary keyed by viewer id;
    /// ids with no matching row are absent from the result. Read-only (AsNoTracking).
    /// </summary>
    Task<Dictionary<long, string>> LoadDisplayNamesAsync(IReadOnlyCollection<long> viewerIds, CancellationToken ct = default);

    /// <summary>
    /// Batch-loads the <see cref="ChatUserProfile"/> fields for a set of viewer ids. Used by chat
    /// surfaces (guild_chat, gathering_chat) to populate <c>users[]</c> without a direct DB context
    /// in the controller. Ids with no matching row are absent from the result. Read-only (AsNoTracking).
    /// </summary>
    Task<IReadOnlyDictionary<long, ChatUserProfile>> LoadChatProfilesAsync(IReadOnlyCollection<long> viewerIds, CancellationToken ct = default);
}