using Ananta.SDK.Rpc;
using Ananta.Server.Protocol.Client4229938;
using GameMethods = Ananta.Server.RpcTypes.Client4229938.Methods.Game;
using SceneMethods = Ananta.Server.RpcTypes.Client4229938.Methods.GameScene;

namespace Ananta.Server.Handlers.Game;

/// <summary>Only RPC endpoints used by the maintained 4229938 private-server feature set.</summary>
internal sealed partial class GameRouter
{
    [Handler(MethodId.LoginGame, HandlerPacketKind.Notify)]
    private Task LoginGame(Connection conn, UxRpcMessage msg)
    {
        // 把登录时那个 GATE 会话绑到 game 会话上 —— GATE Lua 通道（45437825）只能走它。
        // 照 v0.5-2 捐赠端 Endpoints.cs:16-17；不绑 ⇒ 客户端 Lua 永远发不出去。
        BindGateSession4229938(conn.Session);
        return SendInitialGameState(msg.Context);
    }

    [Handler(MethodId.RequestGameSceneData, HandlerPacketKind.Notify)]
    private Task RequestGameSceneData(Connection conn, UxRpcMessage msg)
        => SendEnterSceneIfNeeded(msg.Context);

    [Handler(MethodId.GetServerTimeGame)]
    private async Task GetServerTime(Connection conn, UxRpcMessage msg)
    {
        if (msg.IsInvoke)
        {
            await conn.ReturnEmptyOkAsync(msg);
            return;
        }
        var args = msg.GetArgs<GameMethods.GetServerTime>();
        await conn.NotifyAsync(MethodId.SendServerTimeGame, LoginCodec.ServerTime(args.clientUnixTime));
    }

    [Handler(MethodId.AskAllSpiritPanelData, HandlerPacketKind.Invoke)]
    private Task AskAllSpiritPanelData(Connection conn, UxRpcMessage msg)
        => conn.ReturnAsync(msg, RuntimePayloadFactory.MinimalAllSpiritPanelData4229938());

    [Handler(MethodId.GetSpriteToken, HandlerPacketKind.Invoke)]
    private Task GetSpriteToken4229938(Connection conn, UxRpcMessage msg)
        => conn.ReturnAsync(msg, new GameMethods.SpriteToken4229938
        {
            Token = string.Empty,
            ExpireTimeStamp = 0
        });

    [Handler(MethodId.CheckPSOPermissions, HandlerPacketKind.Invoke)]
    private Task CheckPsoPermissions(Connection conn, UxRpcMessage msg)
        => conn.ReturnAsync(msg, false);

    /// <summary>
    /// AskDeleteTask(63618078) — the "settle / abandon the running task" confirmation.
    ///
    /// The box itself only appears when the client thinks a task is active; SyncPlayerAllTask
    /// is sent with CurrentTask = 0 so ESC keeps opening the phone instead. This handler exists
    /// because the confirmation can still be reached (e.g. via a task HUD button), and an
    /// unanswered INVOKE leaves the client awaiting forever.
    ///
    /// Deliberately does not parse the args: the payload's varint framing for (taskId, fail) was
    /// never confirmed, and guessing it risks a read error. The server owns no task state to
    /// mutate anyway, so an empty OK is the whole answer.
    /// </summary>
    [Handler(MethodId.AskDeleteTask, HandlerPacketKind.Invoke)]
    private Task AskDeleteTask(Connection conn, UxRpcMessage msg)
        => conn.ReturnEmptyOkAsync(msg);

    [Handler(MethodId.AskSetGamePause, HandlerPacketKind.Invoke)]
    private async Task AskSetGamePause(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<SceneMethods.AskSetGamePause>();
        await conn.ReturnEmptyOkAsync(msg);
        await conn.NotifyAsync(MethodId.SyncGamePause, new SceneMethods.SyncGamePause { pause = args.value });
    }

    [Handler(MethodId.AskLoadSceneCompleted, HandlerPacketKind.Notify)]
    private Task AskLoadSceneCompleted(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<SceneMethods.AskLoadSceneCompleted>();
        return OnLoadSceneCompleted(msg.Context, args.sceneId, args.sessionId);
    }

    [Handler(MethodId.AskLoadGameResCompleted, HandlerPacketKind.Notify)]
    private Task AskLoadGameResCompleted(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<SceneMethods.AskLoadGameResCompleted>();
        return OnLoadGameResourcesCompleted(msg.Context, args.sceneId);
    }

    [Handler(MethodId.AskLoadingFinished, HandlerPacketKind.Invoke)]
    private async Task AskLoadingFinished(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<SceneMethods.AskLoadingFinished>();
        await conn.ReturnEmptyOkAsync(msg);
        await OnLoadingFinished(msg.Context, args.sceneId, args.sessionId);
    }

    [Handler(MethodId.AskLoadedInSameScene, HandlerPacketKind.Notify)]
    private Task AskLoadedInSameScene(Connection conn, UxRpcMessage msg)
        => OnLoadedInSameScene(msg.Context);

    [Handler(MethodId.AskSwitchSpirit)]
    private async Task AskSwitchSpirit(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<SceneMethods.AskSwitchSpirit>();
        await conn.ReturnEmptyOkAsync(msg);
        await OnSwitchSpirit(msg.Context, args.spiritId);
    }

    /// <summary>
    /// 切人演出 phase 2 的回执（67654364）。客户端播完 SyncPreSwitchSpirit 带的那段 Timeline 后调用，
    /// 服务端此时才把控制权交给已经站在演出落点上的目标角色。
    /// ⛑ 这是 INVOKE：不接会让客户端 await 到超时（硬规则 94/112）。
    /// 没等到也不会卡 roster —— OnSwitchSpirit 开头有 PreSwitchTimeoutMs 兜底。
    /// </summary>
    [Handler(MethodId.ReportPreSwitchSpiritFinish)]
    private async Task ReportPreSwitchSpiritFinish(Connection conn, UxRpcMessage msg)
    {
        await conn.ReturnEmptyOkAsync(msg);
        await OnPreSwitchSpiritFinish(msg.Context);
    }

    [Handler(MethodId.AskSwitchWeapon, HandlerPacketKind.Notify)]
    private Task AskSwitchWeapon(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<SceneMethods.AskSwitchWeapon>();
        return OnSwitchWeapon(msg.Context, args.index);
    }

    [Handler(MethodId.AskSwitchFightStyle, HandlerPacketKind.Invoke)]
    private async Task AskSwitchFightStyle(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<GameMethods.AskSwitchFightStyle>();
        await conn.ReturnEmptyOkAsync(msg);
        await OnSwitchFightStyle(msg.Context, args.spiritId, args.fightStyleTypeId, args.fightStyleId);
    }

    [Handler(MethodId.AskSetWeaponFightStyle, HandlerPacketKind.Invoke)]
    private async Task AskSetWeaponFightStyle(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<GameMethods.AskSetWeaponFightStyle>();
        await conn.ReturnEmptyOkAsync(msg);
        await OnSetWeaponFightStyle(msg.Context, args.weaponInstanceId, args.fightStyleId);
    }

    [Handler(MethodId.AskLoadWeaponToSlot, HandlerPacketKind.Invoke)]
    private async Task AskLoadWeaponToSlot(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<GameMethods.AskLoadWeaponToSlot>();
        await conn.ReturnEmptyOkAsync(msg);
        await OnLoadWeaponToSlot(msg.Context, args.spiritId, args.weaponId, args.slotIndex);
    }

    [Handler(MethodId.AskDepositSpiritWeapon, HandlerPacketKind.Invoke)]
    private async Task AskDepositSpiritWeapon(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<GameMethods.AskDepositSpiritWeapon>();
        await conn.ReturnEmptyOkAsync(msg);
        await OnDepositSpiritWeapon(msg.Context, args.spiritId, args.slotIndex);
    }

    [Handler(MethodId.AskExchangeWeaponSlot, HandlerPacketKind.Invoke)]
    private async Task AskExchangeWeaponSlot(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<GameMethods.AskExchangeWeaponSlot>();
        await conn.ReturnEmptyOkAsync(msg);
        await OnExchangeWeaponSlot(msg.Context, args.fromSpirit, args.fromIndex, args.toSpirit, args.toIndex);
    }

    [Handler(MethodId.AskAddClientBuff)]
    private async Task AskAddClientBuff(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<SceneMethods.AskAddClientBuff>();
        await conn.ReturnEmptyOkAsync(msg);
        await OnClientBuffAdd(msg.Context, args.unitId, args.buffId);
    }

    [Handler(MethodId.AskRemoveClientBuff)]
    private async Task AskRemoveClientBuff(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<SceneMethods.AskRemoveClientBuff>();
        await conn.ReturnEmptyOkAsync(msg);
        await OnClientBuffRemove(msg.Context, args.unitId, args.buffId);
    }

    [Handler(MethodId.AskEnterFeiSuoCrouch, HandlerPacketKind.Notify)]
    private Task AskEnterFeiSuoCrouch(Connection conn, UxRpcMessage msg)
        => OnEnterFeiSuoCrouch(msg.Context);

    [Handler(MethodId.AskFeiSuoSuccess, HandlerPacketKind.Invoke)]
    private async Task AskFeiSuoSuccess(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<SceneMethods.AskFeiSuoSuccess>();
        await OnFeiSuoSuccess(msg.Context, args.feiSuoId);
        await conn.ReturnEmptyOkAsync(msg);
    }

    [Handler(MethodId.AskLeaveFeiSuoCrouch, HandlerPacketKind.Notify)]
    private Task AskLeaveFeiSuoCrouch(Connection conn, UxRpcMessage msg)
        => OnLeaveFeiSuoCrouch(msg.Context);

    /// <summary>
    /// 蹲伏暗杀候选上报（Notify）。客户端 <c>StealthManager</c> 每 0.4s 报一次「谁在我背后」，
    /// 服务端回 <c>SyncEnemyCanAssassinate</c>(68218494) 授权 —— 没有这一来一回，
    /// 客户端就不会挂暗杀交互，HUD 永远不出提示。
    /// ⛑ 规则 94：MethodId 必须同时进 <c>GameRouter.cs</c> 的 <c>Enabled4229938MethodIds</c>。
    /// </summary>
    [Handler(MethodId.ReportCanAssassinateEnemies, HandlerPacketKind.Notify)]
    private Task ReportCanAssassinateEnemies(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<SceneMethods.ReportCanAssassinateEnemies4229938>();
        return OnReportCanAssassinateEnemies(msg.Context, args.enemyids);
    }

    [Handler(MethodId.AskClientUseCommonSkill, HandlerPacketKind.Invoke)]
    [Handler(MethodId.AskUseSkill, HandlerPacketKind.Invoke)]
    private Task AskUseSkill(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<SceneMethods.AskUseSkill>();
        return OnClientUseSkill(msg.Context, args.data);
    }

    [Handler(MethodId.AskSkillUseWeaponDurability, HandlerPacketKind.Notify)]
    private Task AskSkillUseWeaponDurability(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<SceneMethods.AskSkillUseWeaponDurability>();
        return OnSkillUseWeaponDurability(msg.Context, args.skillid, args.triggerindex);
    }

    [Handler(MethodId.AskWeaponEquipBullets, HandlerPacketKind.Invoke)]
    private async Task AskWeaponEquipBullets(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<SceneMethods.AskWeaponEquipBullets>();
        await conn.ReturnEmptyOkAsync(msg);
        await OnWeaponEquipBullets(msg.Context, args.weaponinstanceid, args.bulletid);
    }

    [Handler(MethodId.ReportSkillEnd, HandlerPacketKind.Notify)]
    private Task ReportSkillEnd(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<SceneMethods.ReportSkillEnd>();
        return OnReportSkillEnd(msg.Context, args);
    }

    [Handler(MethodId.AskMultipleSkillHit2, HandlerPacketKind.Notify)]
    private Task AskMultipleSkillHit2(Connection conn, UxRpcMessage msg)
    {
        var args = msg.GetArgs<SceneMethods.AskMultipleSkillHit2>();
        return OnSkillHit(msg.Context, args.skillHitData);
    }

    [Handler(MethodId.AskInterruptSkillExecute, HandlerPacketKind.Invoke)]
    [Handler(MethodId.AskInterruptSkillExecuteStiff, HandlerPacketKind.Invoke)]
    [Handler(MethodId.AskSkillExecuteEnd, HandlerPacketKind.Invoke)]
    [Handler(MethodId.AskSkillExecute, HandlerPacketKind.Invoke)]
    private static Task AcceptCombatInvoke(Connection conn, UxRpcMessage msg)
        => conn.ReturnEmptyOkAsync(msg);

    // AskSkillDestructibleCreate is answered in GameRouter.WeaponDrop.cs — dropping a weapon needs
    // a real destructible id, and the hard 0 this used to return made every later step of the drop
    // (absorb animation, Q prompt, pick-up) address an entity that does not exist.

    [Handler(MethodId.AskReportLogicAgentSyncData)]
    [Handler(MethodId.AskUnitMoveActionSimple, HandlerPacketKind.Notify)]
    [Handler(MethodId.AskUnitMoveActionSimpleWithGround, HandlerPacketKind.Notify)]
    [Handler(MethodId.AskUnitMoveActionWithGround, HandlerPacketKind.Notify)]
    [Handler(MethodId.AskUnitMoveAction, HandlerPacketKind.Notify)]
    private async Task MovementReport(Connection conn, UxRpcMessage msg)
    {
        IEnumerable<SceneMethods.LogicAgentSyncData>? samples = msg.MethodId switch
        {
            MethodId.AskReportLogicAgentSyncData => msg.GetArgs<SceneMethods.AskReportLogicAgentSyncData>().list,
            MethodId.AskUnitMoveActionSimple => msg.GetArgs<SceneMethods.AskUnitMoveActionSimple>().actions.Select(x =>
                new SceneMethods.LogicAgentSyncData { AgentId = x.UnitId, Position = x.Pos, Rotation = x.Rot }),
            MethodId.AskUnitMoveActionSimpleWithGround => msg.GetArgs<SceneMethods.AskUnitMoveActionSimpleWithGround>().actions.Select(x =>
                new SceneMethods.LogicAgentSyncData { AgentId = x.UnitId, Position = x.Pos, Rotation = x.Rot }),
            MethodId.AskUnitMoveAction => msg.GetArgs<SceneMethods.AskUnitMoveAction>().actions.Select(x =>
                new SceneMethods.LogicAgentSyncData { AgentId = x.UnitId, Position = x.Pos, Rotation = x.Rot }),
            MethodId.AskUnitMoveActionWithGround => msg.GetArgs<SceneMethods.AskUnitMoveActionWithGround>().actions.Select(x =>
                new SceneMethods.LogicAgentSyncData { AgentId = x.UnitId, Position = x.Pos, Rotation = x.Rot }),
            _ => null
        };

        await conn.ReturnEmptyOkAsync(msg);
        await OnMovementReport(msg.Context, samples);
    }
}