using Ananta.Server.RpcTypes.Client4229938;
using SceneMethods = Ananta.Server.RpcTypes.Client4229938.Methods.GameScene;

namespace Ananta.Server.Protocol.Client4229938;

/// <summary>
/// Typed factories for world/game-scene messages. The wire layout itself lives in Ananta.RpcTypes.
/// Large world/profile packets are built as RpcTypes DTOs by RuntimePayloadFactory and serialized on the fly.
/// </summary>
internal static class WorldCodec
{
    internal static SceneMethods.SyncLogicAgentEnter LogicAgentEnter(ulong agentId)
        => new() { agentId = agentId };

    internal static SceneMethods.SyncLogicAgentLeave LogicAgentLeave(ulong agentId)
        => new() { agentId = agentId };

    internal static SceneMethods.SyncManagedLogicAgent ManagedLogicAgent(ulong agentId, ulong pid, byte moveId = 0)
        => new() { agentId = agentId, pid = pid, moveId = moveId };

    /// <summary>
    /// S2C 68838628 <c>SyncLogicAgentSyncData</c> —— 给「服务端驱动」单位回正位姿。
    ///
    /// ⛑⛑ 它**不能驱动步态**（donor1 第 39 轮 + 我们 09-20 实测已证伪：10Hz 推了 6280 条，
    /// 字节布局与客户端上报逐字节对齐，人依然纹丝不动），但正是这个「纹丝不动」
    /// 才是我们要的：留在大世界里的旧角色一旦没人管就会自由落体掉出世界
    ///（2026-09-24 18:1x 实测 Y 从 -0.13 → -293 → -3000，约 60~90 m/s），
    /// 因为客户端停掉自己的 AI 后只做物理模拟，而这些 actor 没有地面吸附。
    /// ⇒ 用这个包把记录里的站立位姿回给它，它就不会掉。
    /// </summary>
    internal static SceneMethods.SyncLogicAgentSyncData4229938 LogicAgentSyncData(
        ulong agentId, Vec3 position, float facing, byte moveId = 1)
        => new()
        {
            AgentId = agentId,
            Position = new SceneMethods.UxVector3(position.X, position.Y, position.Z),
            Rotation = new SceneMethods.UxVector3(0f, facing, 0f),
            MoveId = moveId,
        };

    /// <summary>
    /// Round 39 (donor1): <c>SyncLogicAgentCommand</c> (mid 68050574) carrying a <b>movement task</b> -
    /// <c>TaskWayPointMoveCommandData</c> (wire tag 39). It carries speed, move action and animation
    /// group with the waypoints, so the client needs no navigation data at all to run the walk.
    /// ★ donor1 round-51 用户亲测的"完整路人"驱动协议（一直有走路动画、会移动、到目的地停下）。
    /// </summary>
    internal static SceneMethods.SyncLogicAgentCommandWayPoint LogicAgentCommandWayPoint(
        ulong agentId, int commandId, byte specificMethod, float speed, uint moveActionId, uint moveActionGroup,
        bool keepMovingAction, IReadOnlyList<SceneMethods.UxVector3> points, bool noRootMotion = true)
        => new()
        {
            agentId = agentId,
            commandId = commandId,
            data = new SceneMethods.TaskWayPointMoveCommandData
            {
                SpecificMethod = specificMethod,
                KeepMovingAction = keepMovingAction,
                Speed = speed,
                MoveActionId = moveActionId,
                NoRootMotion = noRootMotion,
                MoveActionGroup = moveActionGroup,
                WayPoints = points.ToList(),
            },
        };


    internal static SceneMethods.SyncPlayerCurrentSpirit CurrentSpirit()
        => CurrentSpirit(Profile.PlayerPid, Profile.InitialSpiritTemplateId, Profile.InitialUnitId);

    internal static SceneMethods.SyncPlayerCurrentSpirit CurrentSpirit(ulong playerPid, uint templateId, ulong spiritId, bool isAgentSwitch = false)
        => new()
        {
            playerPid = playerPid,
            templateId = templateId,
            spiritId = spiritId,
            isAgentSwitch = isAgentSwitch
        };

    /// <summary>
    /// 切人演出的收尾握手之一：告诉客户端"新角色就在原地接管"（2 字段版本，见
    /// <c>WorldMethods.cs</c> 里 <c>SyncPlayerSwitchSpiritInSitu</c> 的注释）。
    /// </summary>
    internal static SceneMethods.SyncPlayerSwitchSpiritInSitu SwitchSpiritInSitu(uint templateId, ulong spiritId)
        => new()
        {
            templateId = templateId,
            spiritId = spiritId
        };

    /// <summary>
    /// <c>SyncManagedSpirit</c> / <c>SyncManagedAgent</c> 共用的包体构造。
    /// CBT2 官方服务端这里传的是 <c>moveId = 0</c>。
    /// </summary>
    internal static SceneMethods.SyncManagedUnit4229938 ManagedUnit(ulong pid, ulong id, int moveId = 0)
        => new()
        {
            pid = pid,
            id = id,
            moveId = moveId
        };

    internal static SceneMethods.SyncSwitchSpiritConfigId SwitchSpiritConfigId(
        uint configId, Vec3 position, IReadOnlyCollection<ulong>? spawnedAgentIds = null)
        => new()
        {
            configId = configId,
            position = new SceneMethods.UxVector3(position.X, position.Y, position.Z),
            spawnedAgentIds = spawnedAgentIds?.ToList() ?? []
        };

    internal static SceneMethods.SyncPreSwitchSpirit PreSwitchSpirit(uint configId, uint newTemplateId, Vec3 position)
        => new()
        {
            configId = configId,
            newTemplateId = newTemplateId,
            position = new SceneMethods.UxVector3(position.X, position.Y, position.Z)
        };

    internal static SceneMethods.SyncPlayerLoadRate PlayerLoadRate(double rate = 1.0)
        => new() { playerPid = Profile.PlayerPid, rate = rate };

    internal static SceneMethods.SyncSceneLoadCompleted SceneLoadCompleted(ulong sceneId)
        => new() { sceneId = sceneId };

    /// <summary>
    /// Hard snap: the unit is placed and its locomotion state is explicitly "none" (MoveAction.Unknown).
    /// Correct for teleports and first-time placement — wrong for anything that is supposed to walk,
    /// because a unit moved this way slides to the target without ever playing a gait.
    /// </summary>
    internal static SceneMethods.SyncUnitPositionAndFacing PositionAndFacing(ulong unitId, Vec3 position, float facing, byte setPositionType = SetPositionType.SwitchSpirit)
        => PositionAndFacing(unitId, position, facing, setPositionType, continueMove: false, moveId: MoveAction.Unknown);

    /// <summary>
    /// Position push that also tells the client <b>which locomotion state the unit is in</b>.
    ///
    /// <paramref name="moveId"/> is a <c>UX.Game.BattleMoveActionType</c> and is the field the client's
    /// locomotion state machine reads. 0 (Unknown) means "no gait", so an entity moved this way slides
    /// to the new position without playing a walk/run cycle — the "走路僵硬 / 瞬移" symptom. Every
    /// overload here used to hardcode <c>moveId = 0</c>, which made any server-driven movement look
    /// stiff no matter what the caller intended.
    /// </summary>
    internal static SceneMethods.SyncUnitPositionAndFacing PositionAndFacing(
        ulong unitId, Vec3 position, float facing, byte setPositionType, bool continueMove, byte moveId)
        => new()
        {
            unitId = unitId,
            position = new SceneMethods.UxVector3(position.X, position.Y, position.Z),
            facing = facing,
            moveId = moveId,
            continueMove = continueMove,
            setPositionType = setPositionType,
            moveGroundInfo = null,
            loadingInfo = null,
        };

    /// <summary>Walking push: gait = WalkFront, GM positioning, keep the locomotion state alive on arrival.</summary>
    internal static SceneMethods.SyncUnitPositionAndFacing Walking(
        ulong unitId, Vec3 position, float facing,
        byte moveId = MoveAction.WalkFront,
        byte setPositionType = SetPositionType.Gm,
        bool continueMove = true)
        => PositionAndFacing(unitId, position, facing, setPositionType, continueMove, moveId);

    internal static SceneMethods.SyncUnitPositionAndFacing PositionAndFacing(Vec3 position, float facing, byte setPositionType = SetPositionType.SwitchSpirit)
        => PositionAndFacing(Profile.InitialUnitId, position, facing, setPositionType);

    internal static SceneMethods.SyncUnitPositionP PositionP(ulong unitId, Vec3 position, float facing, byte setPositionType = SetPositionType.SwitchSpirit)
        => PositionP(unitId, position, facing, setPositionType, MoveAction.Unknown);

    /// <summary>
    /// <see cref="SyncUnitPositionP"/> carries a moveId too, so it has the same "no gait" trap as
    /// <see cref="PositionAndFacing(ulong, Vec3, float, byte)"/>.
    /// </summary>
    internal static SceneMethods.SyncUnitPositionP PositionP(ulong unitId, Vec3 position, float facing, byte setPositionType, byte moveId)
        => new()
        {
            unitId = unitId,
            position = new SceneMethods.UxVector3(position.X, position.Y, position.Z),
            facing = facing,
            moveId = moveId,
            setPositionType = setPositionType
        };

    internal static SceneMethods.SyncUnitPositionP PositionP(Vec3 position, float facing, byte setPositionType = SetPositionType.SwitchSpirit)
        => PositionP(Profile.InitialUnitId, position, facing, setPositionType);

    internal static SceneMethods.SyncGamePause GamePause(bool pause)
        => new() { pause = pause };

    internal static SceneMethods.SyncEntityActionGroup EntityActionGroup(ulong unitId, uint actionGroupId = 1u)
        => new() { unitId = unitId, actionGroupId = actionGroupId };

    internal static SceneMethods.SyncAllSpiritCombatPower AllSpiritCombatPower(uint templateId, float combatPower = 1000f)
        => new() { combatPower = new Dictionary<uint, float> { [templateId] = combatPower } };

    internal static SceneMethods.SyncAllSpiritCombatPower AllSpiritCombatPower(params uint[] templateIds)
    {
        var body = new SceneMethods.SyncAllSpiritCombatPower();
        foreach (var templateId in templateIds)
            body.combatPower[templateId] = 1000f;
        return body;
    }

    internal static SceneMethods.SyncChangeSkill SkillBinding(ulong spiritId, uint skillId)
        => new()
        {
            spiritId = spiritId,
            skillId = skillId,
            duration = skillId == 0 ? 0f : 99999f
        };

    internal static SceneMethods.SyncUnitBuffList UnitBuffList(ulong unitId, IReadOnlyList<uint> buffIds, uint firstInstanceId)
    {
        var body = new SceneMethods.SyncUnitBuffList { entityId = unitId };
        // 4229938 still evaluates ExpireTime inside several client-side BuffActions even when
        // Permanent=true. ExpireTime=0 becomes a huge negative remaining time and can execute
        // teardown paths immediately. Use a real far-future unix timestamp for persistent state.
        var persistentExpiry = DateTimeOffset.UtcNow.ToUnixTimeSeconds() + 315_360_000d;
        var instanceId = firstInstanceId;
        foreach (var buffId in buffIds)
        {
            body.buffs.Add(new SceneMethods.BuffViewData
            {
                InstanceId = instanceId++,
                Id = buffId,
                ReleaserId = unitId,
                ExpireTime = persistentExpiry,
                Tier = 1,
                Permanent = true,
                DestructibleId = 0
            });
        }
        return body;
    }

    internal static SceneMethods.SyncUnitAddBuff UnitAddBuff(ulong unitId, uint buffId, uint instanceId)
        => new()
        {
            entityId = unitId,
            buff = new SceneMethods.BuffViewData
            {
                InstanceId = instanceId,
                Id = buffId,
                ReleaserId = unitId,
                ExpireTime = DateTimeOffset.UtcNow.ToUnixTimeSeconds() + 315_360_000d,
                Tier = 1,
                Permanent = true,
                DestructibleId = 0
            }
        };

    internal static SceneMethods.SyncUnitRemoveBuff UnitRemoveBuff(ulong unitId, uint buffInstanceId)
        => new() { entityId = unitId, buffInstanceId = buffInstanceId };

    internal static SceneMethods.SyncUnitStates UnitStates(ulong unitId, params uint[] states)
        => new() { unitId = unitId, states = states?.ToList(), effectFreezeState = 0 };

    internal static SceneMethods.SyncUnitStates UnitStates(params uint[] states)
        => UnitStates(Profile.InitialUnitId, states);

    internal static SceneMethods.SyncRemoveUnitState RemoveUnitState(ulong unitId, uint state)
        => new() { unitId = unitId, state = state, reason = 1, sourceId = 0 };

    internal static SceneMethods.SyncRemoveUnitState RemoveUnitState(uint state)
        => RemoveUnitState(Profile.InitialUnitId, state);

    /// <summary>
    /// <c>UX.Game.BattleMoveActionType</c> — authoritative values from
    /// <c>ux_rpc/ux_game_all.dump.cs:21040</c> (IL2CPP TypeDefIndex 32492).
    ///
    /// This is the <c>moveId</c> byte of <c>SyncUnitPositionAndFacing</c>, <c>SyncUnitPositionP</c> and
    /// <c>SyncManagedLogicAgent</c>, and of every <c>BattleMoveDataBase</c> subclass. The enum itself is
    /// an <c>int</c> in the client, but the wire field is a single byte.
    ///
    /// Unknown (0) means "no locomotion state" — a unit pushed with it slides instead of walking, which
    /// is why server-driven movement used to look stiff.
    /// </summary>
    internal static class MoveAction
    {
        internal const byte Unknown = 0;
        internal const byte Idle = 1;
        internal const byte WalkFront = 2;
        internal const byte WalkBack = 3;
        internal const byte WalkLeft = 4;
        internal const byte WalkRight = 5;
        internal const byte Run = 6;

        internal const byte Min = Unknown;
        internal const byte Max = Run;

        internal static readonly (byte Id, string Name)[] All =
        [
            (Unknown, "Unknown 空"),
            (Idle, "Idle 待机"),
            (WalkFront, "WalkFront 前进"),
            (WalkBack, "WalkBack 后退"),
            (WalkLeft, "WalkLeft 左移"),
            (WalkRight, "WalkRight 右移"),
            (Run, "Run 奔跑"),
        ];

        internal static string NameOf(byte moveId)
        {
            foreach (var entry in All)
            {
                if (entry.Id == moveId)
                    return entry.Name;
            }

            return $"MoveId {moveId}";
        }
    }

    /// <summary>
    /// <c>UX.Game.SetPositionTypeForClient</c> — authoritative values from
    /// <c>ux_rpc/ux_game_all.dump.cs:15656</c> (IL2CPP TypeDefIndex 32205).
    ///
    /// ⚠️ <c>Gm</c> is NOT a prerequisite for moving the main character: the value that matters less
    /// than the packet. Moving the local avatar via <c>SyncUnitPosition_P</c> fails no matter which
    /// type is used (NetworkGhostModule demands NetworkRoleType.Proxy); use
    /// <c>SyncUnitPositionAndFacing</c> with the default <c>SwitchSpirit</c> instead — that is what
    /// the donor server's own teleport API does and it lands the player.
    /// </summary>
    internal static class SetPositionType
    {
        internal const byte Force = 0;
        internal const byte RejectSync = 1;
        internal const byte Revive = 2;
        internal const byte SwitchSpirit = 3;
        internal const byte SpoonNoLoading = 4;
        internal const byte FallGround = 5;
        internal const byte Teleport = 6;
        internal const byte Gm = 7;
        internal const byte Portal = 8;
        internal const byte OutOfStuck = 9;
    }
}