using System;
using System.Collections.Concurrent;

namespace WatchParty.Parties
{
    /// <summary>
    /// A watch party: a join code, the item everyone's meant to be watching,
    /// and the set of members being kept in sync. See docs/architecture.md.
    /// </summary>
    public class Party
    {
        public Guid Id { get; set; } = Guid.NewGuid();

        /// <summary>Short human-typeable code used to join, e.g. "K7QX2P".</summary>
        public string JoinCode { get; set; }

        /// <summary>The library item everyone is meant to be watching. Emby's own
        /// item/user ids are plain strings on this SDK version (confirmed by
        /// building against the real MediaBrowser.Model assembly) - only Party.Id
        /// itself (below) is a Guid we mint ourselves.</summary>
        public string ItemId { get; set; }

        public string HostUserId { get; set; }

        /// <summary>
        /// Whose reported position is treated as ground truth. Defaults to the
        /// host, but falls back to whoever's left if the host leaves (see
        /// PartyManager.Leave).
        /// </summary>
        public string ReferenceUserId { get; set; }

        public DateTime CreatedUtc { get; set; } = DateTime.UtcNow;

        public ConcurrentDictionary<string, PartyMember> Members { get; } = new ConcurrentDictionary<string, PartyMember>();

        public DateTime LastActivityUtc { get; set; } = DateTime.UtcNow;
    }
}