using System;
using System.Collections.Generic;

namespace Jellyfin.Plugin.RecentlyAddedGuard.Ledger;

/// <summary>
/// The first "date added" of one logical medium (a movie or an episode), independent of its files.
/// </summary>
/// <remarks>
/// <see cref="Keys"/> and <see cref="LiveItemIds"/> are indexed by the <see cref="LedgerStore"/>;
/// change them only through the store so the indexes stay consistent.
/// </remarks>
public sealed class LedgerEntry
{
    /// <summary>
    /// Gets or sets all alias keys of the medium (e.g. <c>movie:tmdb:603</c>).
    /// </summary>
#pragma warning disable CA1819 // Plain persistence model; the store owns all mutations.
    public string[] Keys { get; set; } = [];
#pragma warning restore CA1819

    /// <summary>
    /// Gets or sets the protected first "date added" (UTC).
    /// </summary>
    public DateTime FirstAdded { get; set; }

    /// <summary>
    /// Gets or sets when an item of this medium was last seen (UTC).
    /// </summary>
    public DateTime LastSeen { get; set; }

    /// <summary>
    /// Gets or sets when the last live item of this medium disappeared (UTC); <c>null</c> while items exist.
    /// </summary>
    public DateTime? RemovedAt { get; set; }

    /// <summary>
    /// Gets or sets the ids of the Jellyfin items currently representing this medium.
    /// </summary>
#pragma warning disable CA2227 // Plain persistence model; the store owns all mutations.
    public HashSet<Guid> LiveItemIds { get; set; } = [];
#pragma warning restore CA2227

    /// <summary>
    /// Gets or sets a display name for logs and the configuration page.
    /// </summary>
    public string DisplayName { get; set; } = string.Empty;
}