XFEEDToolBox

namespace XFEEDToolBox.Plugin;

internal static unsafe partial class Navigation
{
    private static bool TryBindPhysicalInputs(in Snapshot frame,out string? issue)
    {
        issue=null;
        if(!frame.valid||frame.entity==0||frame.inputRoot==0){issue="current-main-ship";return false;}
        if(!EnsureTakeoverKeyboard()){lock(takeoverKeyboardLock)issue=takeoverKeyboardIssue??"keyboard-observer-unavailable";return false;}
        return true;
    }
    private static bool TryReadPhysicalInput(in Snapshot frame,ulong epoch,ulong now,out double magnitude,out string dominant)
    {
        magnitude=0;dominant="";
        if(!frame.valid||frame.entity==0||frame.inputRoot==0)return false;
        if(!ReadTakeoverKeyboard(frame,epoch,now,out dominant))return false;
        magnitude=dominant.Length>0?1:0;return true;
    }
    private static void RequirePhysicalInputSources(in Snapshot frame,ulong now)
    {
        if(!TryReadPhysicalInput(frame,controllerEpoch,now,out var magnitude,out var source))
        {
            if(!TryBindPhysicalInputs(frame,out var issue)||!TryReadPhysicalInput(frame,controllerEpoch,GetTickCount64(),out magnitude,out source))
            {
                lock(takeoverKeyboardLock)issue??=takeoverKeyboardIssue;
                throw new InvalidOperationException("Original physical input sources unavailable: "+(issue??"keyboard-observer-unavailable"));
            }
        }
        if(magnitude>0){RecordInputTakeover(source,frame);overridden=true;Expire();throw new InvalidOperationException("Player keyboard takeover requested");}
    }
    private static JsonObject PhysicalInputDescription(bool prepare=false,bool includeNames=false)
    {
        var frame=Current();string? issue=null;
        var prepared=!prepare||TryBindPhysicalInputs(frame,out issue);
        var ready=prepared&&TryReadPhysicalInput(frame,controllerEpoch,GetTickCount64(),out _,out _);
        double magnitude=0;string source="";
        if(ready)TryReadPhysicalInput(frame,controllerEpoch,GetTickCount64(),out magnitude,out source);
        lock(takeoverKeyboardLock)issue??=takeoverKeyboardIssue;
        return Obj(("ready",ready),("source","physical-keyboard-W-S-over-1000ms-or-X-tap"),("policyVersion",2),
            ("issue",issue),("sourceState",ready?"verified-low-level-keyboard-observer":"unavailable"),
            ("entityId",frame.entity.ToString()),("inputRoot",frame.inputRoot.ToString("x")),
            ("magnitude",ready?(double?)magnitude:null),("dominantSource",source),
            ("holdMilliseconds",1000),("strictlyGreater",true),("immediateKey","X"),
            ("gameForegroundOnly",true),("injectedEventsIgnored",true),("mixedOutputAxesUsedForTakeover",false),
            ("mouseUsedForTakeover",false),("focusChangeUsedForTakeover",false));
    }
    private static bool PhysicalInputPolicySelfTest()
    {
        var policy=new XFEEDToolBox.Core.Navigation.ManualTakeoverKeyboardPolicy();
        foreach(var key in new uint[]{0x57,0x53})
        {policy.Reset();policy.Key(key,true,100,true);if(policy.Evaluate(1100,true)!=""||policy.Evaluate(1101,true)=="")return false;}
        policy.Reset();policy.Key(0x58,true,10,true);policy.Key(0x58,false,11,true);if(policy.Evaluate(12,true)!="physical-key-X")return false;
        policy.Reset();policy.Key(0x57,true,10,true);if(policy.Evaluate(500,true)!="")return false;policy.Key(0x57,false,501,true);if(policy.Evaluate(2000,true)!="")return false;
        policy.Key(0x57,true,3000,true);policy.Evaluate(3500,false);if(policy.Evaluate(5000,true)!="")return false;
        policy.Key(0x58,true,6000,true,true);return policy.Evaluate(6001,true)=="";
    }
}