using System.Collections.Generic;

namespace Luneraria.Core
{
    /// <summary>Roles of a session (lune_session.gd Role).</summary>
    public enum LuneRole { Offline, Host, Client }

    /// <summary>One lobby row: peer 0 is a bot, peer 1 the host.</summary>
    public sealed class LobbyEntry
    {
        public int Peer;
        public int Slot;
        public string Name = "";
        public bool Ready;
        public bool Bot;

        public LobbyEntry Clone() { return (LobbyEntry)MemberwiseClone(); }
    }

    /// <summary>Result of a session intent (Godot returns a Dictionary with ok, message, pending).</summary>
    public struct SessionResult
    {
        public bool Ok;
        public string Message;
        public bool Pending;

        public SessionResult(bool ok, string message, bool pending = false)
        {
            Ok = ok;
            Message = message;
            Pending = pending;
        }
    }

    /// <summary>One player row of the public state; Draft is set only for the receiving seat.</summary>
    public sealed class NetPlayerRow
    {
        public int Slot;
        public string Name = "";
        public bool IsHuman;
        public int Gold;
        public bool Ready;
        public int Earned;
        public int Spent;
        public int NextSeq;
        public List<RosterEntry> Roster = new List<RosterEntry>();
        public HeroState Hero;
        public List<Booking> Bookings = new List<Booking>();
        /// <summary>Private draft of the receiving seat only; null for every other seat.</summary>
        public Draft Draft;
        /// <summary>Undo stack size of the receiving seat (0 for others).</summary>
        public int Undo;
    }

    /// <summary>Public state of the match for one seat (rpc_state).</summary>
    public sealed class NetState
    {
        public Phase Phase;
        public int Round;
        public int Winner;
        public string EndNote = "";
        public Dictionary<string, double> BuildingHp = new Dictionary<string, double>();
        public BossState Boss = new BossState();
        public Settlement LastSettlement;
        public List<int> DestroyedCores = new List<int>();
        public List<NetPlayerRow> Players = new List<NetPlayerRow>();
    }

    /// <summary>A mobile unit as it crosses the wire (rpc_combat_begin / rpc_units_spawned).</summary>
    public sealed class NetUnitRecord
    {
        public int Id;
        public string Kind = "";
        public int Team;
        public int TeamIndex;
        public int OwnerSlot = -1;
        public string Uid = "";
        public string Lane = "";
        public string Zone = "";
        public UnitDef Def = new UnitDef();
        public double X;
        public double Y;
        public double Facing;
        public double Hp;
        public double MaxHp;
        public bool Alive;
    }

    /// <summary>
    /// Outbound session messages (the Godot RPCs). A transport or a test recorder implements this;
    /// without a link the session still runs offline and for in-process host tests.
    /// </summary>
    public interface ILuneNetLink
    {
        /// <summary>Reliable message to one peer (1 = host).</summary>
        void Send(int peer, string kind, object payload);
        /// <summary>Unreliable ordered combat frame to one peer.</summary>
        void SendFrame(int peer, int serial, double elapsed, float[] units, float[] buildingHp);
    }

    /// <summary>Frames carry 13 floats per mobile unit (lune_session.gd FRAME_STRIDE).</summary>
    public static class LuneNet
    {
        public const int DefaultPort = 24571;
        public const int MaxClients = 5;
        public const int Protocol = 4;
        /// <summary>Seconds between combat snapshots the host sends.</summary>
        public const double FrameInterval = 0.05;
        public const int FrameStride = 13;

        public const string KHello = "hello";
        public const string KSubmit = "submit";
        public const string KReady = "ready";
        public const string KRefused = "refused";
        public const string KFeedback = "feedback";
        public const string KSetup = "setup";
        public const string KState = "state";
        public const string KLobby = "lobby";
        public const string KCombatBegin = "combat_begin";
        public const string KUnitsSpawned = "units_spawned";
    }
}