// Exercise the actual editor controls without capturing the desktop or changing the clipboard.
// Including the implementation lets this integration test drive private editor state directly.
#include "../src/screenshot.cpp"
#include <iostream>
int main(int argc, char **argv)
{
    CoInitializeEx(nullptr,COINIT_APARTMENTTHREADED);
    try {
        if(argc>1 && std::string(argv[1])=="--save-only") {
            auto require=[](bool ok,const char *message){if(!ok) throw std::runtime_error(message);};
            auto root=std::filesystem::temp_directory_path()/(L"KSwitcher-save-"+std::to_wstring(GetCurrentProcessId()));
            std::filesystem::create_directories(root);
            struct Cleanup {std::filesystem::path root; ~Cleanup(){std::error_code ec; std::filesystem::remove_all(root,ec);}} cleanup{root};
            ks::ScreenshotHost app{GetModuleHandleW(nullptr)};
            ks::Capture c(app);
            c.image=std::make_unique<ks::Surface>(320,240);
            PatBlt(c.image->dc,0,0,320,240,WHITENESS);
            c.marks={ks::Mark{{40,40},{180,140},0}};
            auto expected=ks::decodeImage(ks::screenshotClip(c.image->dc,320,240,c.marks));
            for(size_t i=3;i<expected.bgra.size();i+=4) expected.bgra[i]=255;
            auto path=root/L"Знімок.png";
            const auto clipboard=GetClipboardSequenceNumber();
            ks::saveToFile(nullptr,c,path);
            ks::Clip encoded{{{0,L"PNG",ks::readFile(path,16*1024*1024)}}};
            auto actual=ks::decodeImage(encoded);
            require(actual.width==320 && actual.height==240 && actual.bgra==expected.bgra,
                    "PNG export preserves full resolution, annotations and opaque pixels");
            require(c.savedPath==path && c.copied,"successful save records destination and exported state");
            require(GetClipboardSequenceNumber()==clipboard,"saving does not change clipboard");
            c.remember(c.marks); c.marks.clear();
            require(!c.copied,"editing after save marks changes unexported");
            ks::save(nullptr,c);
            actual=ks::decodeImage(ks::Clip{{{0,L"PNG",ks::readFile(path,16*1024*1024)}}});
            require(actual.bgra!=expected.bgra && c.copied,"Save overwrites remembered path with current edits without a dialog");
            c.copied=false;
            ks::save(nullptr,c,true,[](LPOPENFILENAMEW dialog)->BOOL {
                if(!(dialog->Flags&OFN_OVERWRITEPROMPT) || std::wstring(dialog->lpstrDefExt)!=L"png" ||
                   !std::wstring(dialog->lpstrFile).ends_with(L"Знімок.png"))
                    throw std::runtime_error("Save As dialog must preserve filename, PNG extension and overwrite confirmation");
                return FALSE;
            });
            require(!c.copied && c.savedPath==path,"cancelled Save As preserves dirty state and remembered path");
            auto another=root/L"Another.png";
            ks::save(nullptr,c,true,[](LPOPENFILENAMEW dialog)->BOOL {
                auto destination=std::filesystem::path(dialog->lpstrFile).parent_path()/L"Another.png";
                wcscpy_s(dialog->lpstrFile,dialog->nMaxFile,destination.c_str());
                return TRUE;
            });
            require(c.savedPath==another && std::filesystem::exists(path),"new destination preserves previous file");
            c.copied=false;
            bool failed=false;
            try {ks::saveToFile(nullptr,c,root/L"missing"/L"fail.png");} catch(const std::exception &){failed=true;}
            require(failed && !c.copied && c.savedPath==another,"failed save preserves dirty state and previous destination");
            require(std::distance(std::filesystem::directory_iterator(root),std::filesystem::directory_iterator{})==2,
                    "saving leaves no temporary files");
            bool invalid=false;
            try {ks::save(nullptr,c,true,[](LPOPENFILENAMEW dialog)->BOOL {
                auto destination=std::filesystem::path(dialog->lpstrFile).parent_path()/L"Wrong.jpg";
                wcscpy_s(dialog->lpstrFile,dialog->nMaxFile,destination.c_str()); return TRUE;
            });} catch(const std::exception &){invalid=true;}
            require(invalid && !std::filesystem::exists(root/L"Wrong.jpg"),"PNG export rejects a misleading file extension");
            CoUninitialize();
            std::cout<<"Passed screenshot PNG save regressions without opening windows\n";
            return 0;
        }
        INITCOMMONCONTROLSEX controls{sizeof(controls),ICC_STANDARD_CLASSES}; InitCommonControlsEx(&controls);
        ks::ScreenshotHost app{GetModuleHandleW(nullptr)};
        app.window=CreateWindowW(L"STATIC",L"",0,0,0,0,0,HWND_MESSAGE,nullptr,app.instance,nullptr);
        ks::Capture c(app);
        c.image=std::make_unique<ks::Surface>(320,240);
        PatBlt(c.image->dc,0,0,320,240,WHITENESS); c.start={0,0}; c.end={320,240};
        WNDCLASSW cls{}; cls.hInstance=app.instance; cls.lpfnWndProc=ks::captureProc;
        cls.lpszClassName=L"KSwitcher.Editor.Integration"; RegisterClassW(&cls);
        auto window=CreateWindowW(cls.lpszClassName,L"Editor test",WS_POPUP,0,0,320,240,app.window,nullptr,app.instance,&c);
        auto require=[](bool ok,const char *message){ if(!ok) throw std::runtime_error(message); };
        require(window!=nullptr,"editor creation");
        ks::edit(window,c); ShowWindow(window,SW_HIDE);
        require(GetWindow(window,GW_OWNER)==nullptr && (GetWindowLongPtrW(window,GWL_EXSTYLE)&WS_EX_APPWINDOW),
                "editor is an independent Alt+Tab application window");
        require(GetDlgItem(window,50)!=nullptr && c.statusHeight>0,"status bar is created");
        require(c.pencilCursor!=nullptr,"pencil drawing cursor loads");
        require(c.freehand && !c.pointer && ks::toolCursor(c)==c.pencilCursor,
                "new screenshot editor starts with the pencil tool");
        {
            BYTE savedKeys[256]{},keys[256]{}; GetKeyboardState(savedKeys);
            std::copy(savedKeys,savedKeys+256,keys); keys[VK_SHIFT]=0; SetKeyboardState(keys);
            auto mouse=[&](UINT message,POINT p,bool shift=false) {
                int x=c.view.left+MulDiv(p.x,c.view.right-c.view.left,c.image->width);
                int y=c.view.top+MulDiv(p.y,c.view.bottom-c.view.top,c.image->height);
                SendMessageW(window,message,(message==WM_LBUTTONUP?0:MK_LBUTTON)|(shift?MK_SHIFT:0),MAKELPARAM(x,y));
            };
            mouse(WM_LBUTTONDOWN,{40,40},true);
            mouse(WM_MOUSEMOVE,{100,50},true);
            require(c.stroke.to.x==100 && c.stroke.to.y==40,"Shift constrains pencil horizontally");
            mouse(WM_MOUSEMOVE,{100,90},true);
            require(c.stroke.to.x==100 && c.stroke.to.y==40 && c.stroke.points.size()==2,
                    "50 pixel deviation keeps the current axis");
            mouse(WM_MOUSEMOVE,{100,91},true);
            require(c.stroke.to.x==100 && c.stroke.to.y==91 && c.stroke.points.size()==3 && c.stroke.points[1].y==40,
                    "51 pixel deviation turns vertically and preserves the horizontal segment");
            mouse(WM_MOUSEMOVE,{70,140});
            require(c.stroke.to.x==70 && c.stroke.to.y==140 && c.stroke.points.size()==4,
                    "releasing Shift resumes freehand in the same stroke");
            SendMessageW(window,WM_KEYDOWN,VK_SHIFT,0);
            mouse(WM_MOUSEMOVE,{140,150},true);
            require(c.stroke.to.x==140 && c.stroke.to.y==140 && c.stroke.points[3].x==70,
                    "pressing Shift mid-stroke anchors at the last drawn point");
            SendMessageW(window,WM_KEYUP,VK_SHIFT,0);
            SendMessageW(window,WM_KEYDOWN,VK_SHIFT,0);
            mouse(WM_MOUSEMOVE,{150,200},true);
            mouse(WM_LBUTTONUP,{150,210},true);
            SetKeyboardState(savedKeys);
            require(c.marks.size()==1 && c.marks[0].to.x==140 && c.marks[0].to.y==210,
                    "repressing Shift without mouse movement starts a new segment and constrains mouse-up");
            SendMessageW(window,WM_COMMAND,12,0);
            require(c.marks.empty(),"mixed freehand and constrained segments undo as one stroke");
            SendMessageW(window,WM_COMMAND,18,0);
            require(c.marks.size()==1 && c.marks[0].points.size()==6,"redo preserves constrained stroke geometry");
            c.marks.clear(); c.selected=-1;
            for(int sx:{-1,1}) for(int sy:{-1,1}) {
                mouse(WM_LBUTTONDOWN,{160,120},true);
                mouse(WM_MOUSEMOVE,{160+sx,120},true);
                for(int step=2;step<=90;++step)
                    mouse(WM_MOUSEMOVE,{160+sx*step,120+sy*step},true);
                require(c.stroke.points.size()==2 && c.stroke.to.x==160+sx*90 && c.stroke.to.y==120+sy*90,
                        "smooth diagonal after one-pixel horizontal jitter stays diagonal without stairs");
                mouse(WM_LBUTTONUP,{160+sx*90,120+sy*90},true);
                c.marks.clear(); c.selected=-1;
                mouse(WM_LBUTTONDOWN,{160-sx*40,120-sy*70},true);
                mouse(WM_MOUSEMOVE,{160,120-sy*70},true);
                for(int step=1;step<=90;++step)
                    mouse(WM_MOUSEMOVE,{160+sx*step,120-sy*70+sy*step},true);
                require(c.stroke.points.size()==3 && c.strokeAxis>=3 &&
                        std::abs(c.stroke.to.x-c.stroke.points[1].x)==std::abs(c.stroke.to.y-c.stroke.points[1].y),
                        "smooth turn from horizontal into diagonal uses raw mouse direction without stairs");
                mouse(WM_LBUTTONUP,{160+sx*90,120-sy*70+sy*90},true);
                c.marks.clear(); c.selected=-1;
            }
            for(int sx:{-1,1}) for(int sy:{-1,1}) {
                mouse(WM_LBUTTONDOWN,{160,120},true);
                mouse(WM_MOUSEMOVE,{160+sx*60,120+sy*50},true);
                require(c.stroke.to.x==160+sx*55 && c.stroke.to.y==120+sy*55,
                        "Shift snaps to exact 45 degree diagonals in all four directions");
                mouse(WM_LBUTTONUP,{160+sx*60,120+sy*50},true);
                c.marks.clear(); c.selected=-1;
            }
            mouse(WM_LBUTTONDOWN,{40,40},true);
            mouse(WM_MOUSEMOVE,{100,40},true);
            mouse(WM_MOUSEMOVE,{160,100},true);
            require(c.stroke.points.size()==3 && c.stroke.to.x==160 && c.stroke.to.y==100 &&
                    c.stroke.points[1].x==100 && c.stroke.points[1].y==40,
                    "large deviation turns a horizontal segment diagonally without losing its corner");
            mouse(WM_MOUSEMOVE,{200,100},true);
            require(c.stroke.to.x==180 && c.stroke.to.y==120 && c.stroke.points.size()==3,
                    "small perpendicular deviation keeps the diagonal axis");
            mouse(WM_MOUSEMOVE,{260,120},true);
            require(c.stroke.to.x==260 && c.stroke.to.y==120 && c.stroke.points.size()==4,
                    "diagonal deviation beyond 50 pixels turns back to horizontal");
            mouse(WM_LBUTTONUP,{260,120},true);
            c.marks.clear(); c.selected=-1;
            for(int sx:{-1,1}) for(int sy:{-1,1}) {
                POINT start{sx>0?310L:9L,120};
                mouse(WM_LBUTTONDOWN,start,true);
                mouse(WM_MOUSEMOVE,{start.x+sx*8,start.y+sy*8},true);
                mouse(WM_MOUSEMOVE,{sx>0?319L:0L,start.y+sy*25},true);
                auto end=c.stroke.to;
                require(end.x>=0 && end.x<320 && end.y>=0 && end.y<240 &&
                        std::abs(end.x-start.x)==std::abs(end.y-start.y),
                        "diagonal stays at 45 degrees and inside image boundaries");
                mouse(WM_LBUTTONUP,{sx>0?319L:0L,start.y+sy*25},true);
                c.marks.clear(); c.selected=-1;
            }
            keys[VK_CONTROL]=0x80; SetKeyboardState(keys);
            mouse(WM_LBUTTONDOWN,{40,40});
            mouse(WM_MOUSEMOVE,{100,70});
            mouse(WM_LBUTTONUP,{120,90});
            SetKeyboardState(savedKeys);
            require(c.marks.size()==1 && c.marks[0].points[1].x==100 && c.marks[0].points[1].y==70 &&
                    c.marks[0].to.x==120 && c.marks[0].to.y==90,
                    "Ctrl keeps its existing drawing behavior without constraining the pencil");
            c.marks.clear(); c.selected=-1;
        }
        for(int size:{32,48,64,96}) {
            auto cursor=(HCURSOR)LoadImageW(app.instance,MAKEINTRESOURCEW(IDC_SCREENSHOT_PENCIL),IMAGE_CURSOR,size,size,0);
            ICONINFO info{};
            require(cursor && GetIconInfo(cursor,&info) && !info.fIcon,"pencil cursor supports standard and high DPI");
            require(info.xHotspot<UINT(size/3) && info.yHotspot>UINT(size*2/3),"pencil cursor draws from its tip");
            if(info.hbmMask) DeleteObject(info.hbmMask);
            if(info.hbmColor) DeleteObject(info.hbmColor);
            DestroyCursor(cursor);
        }
        ks::Surface cursorPreview(784,448);
        PatBlt(cursorPreview.dc,0,0,784,448,WHITENESS);
        int row=0;
        for(int size:{32,48,64,96}) {
            int column=0;
            for(int tool:ks::CursorTools) {
                auto cursor=ks::makeToolCursor(tool,size); ICONINFO info{};
                require(cursor && GetIconInfo(cursor,&info) && !info.fIcon,"tool cursors support standard and high DPI");
                require(info.xHotspot==UINT(MulDiv(7,size,32)) && info.yHotspot==info.xHotspot,"tool cursor hotspot stays on crosshair center");
                BITMAP mask{}; GetObjectW(info.hbmMask,sizeof(mask),&mask);
                require(mask.bmWidth==size && mask.bmHeight==size*2,"cursor transparency mask matches requested DPI");
                if(column%2) {
                    RECT tile{column*112,row*112,(column+1)*112,(row+1)*112};
                    auto dark=CreateSolidBrush(RGB(40,40,40)); FillRect(cursorPreview.dc,&tile,dark); DeleteObject(dark);
                }
                DrawIconEx(cursorPreview.dc,column*112,row*112,cursor,size,size,0,nullptr,DI_NORMAL);
                if(info.hbmMask) DeleteObject(info.hbmMask);
                if(info.hbmColor) DeleteObject(info.hbmColor);
                DestroyCursor(cursor); ++column;
            }
            ++row;
        }
        auto dib=ks::screenshotClip(cursorPreview.dc,784,448,{}).formats[0].data;
        BITMAPFILEHEADER bmp{}; bmp.bfType=0x4d42; bmp.bfOffBits=sizeof(bmp)+sizeof(BITMAPINFOHEADER); bmp.bfSize=DWORD(sizeof(bmp)+dib.size());
        ks::Bytes preview(sizeof(bmp)); memcpy(preview.data(),&bmp,sizeof(bmp)); preview.insert(preview.end(),dib.begin(),dib.end());
        ks::atomicWrite(L"build/cursor-preview.bmp",preview);
        for(int tool:{27,26,21,10,11,22,23,24,25,19}) {
            SendMessageW(window,WM_COMMAND,tool,0);
            HCURSOR expected=nullptr;
            if(tool==27) expected=LoadCursorW(nullptr,IDC_ARROW);
            else if(tool==26) expected=LoadCursorW(nullptr,IDC_IBEAM);
            else if(tool==21) expected=c.pencilCursor;
            else for(size_t i=0;i<std::size(ks::CursorTools);++i) if(ks::CursorTools[i]==tool) expected=c.drawingCursors[i];
            require(expected && ks::actionCursor(c,{-1,ks::MarkPart::None},true)==expected,"each tool uses its own drawing cursor");
            require(ks::actionCursor(c,{-1,ks::MarkPart::None},false)==LoadCursorW(nullptr,IDC_ARROW),"outside canvas uses normal pointer");
            c.marks={{{20,20},{120,20},0}};
            require(ks::actionCursor(c,{0,ks::MarkPart::Body},true)==LoadCursorW(nullptr,IDC_SIZEALL),"move cursor overrides drawing tool");
            require(ks::actionCursor(c,{0,ks::MarkPart::Rotation},true)==LoadCursorW(nullptr,IDC_HAND),"rotation cursor overrides drawing tool");
            require(ks::actionCursor(c,{0,ks::MarkPart::End},true)==LoadCursorW(nullptr,IDC_SIZEWE),"endpoint resize overrides drawing tool");
            require(ks::actionCursor(c,{0,ks::MarkPart::Thickness},true)==LoadCursorW(nullptr,IDC_SIZENS),"thickness resize is perpendicular to line");
        }
        c.marks.clear(); SendMessageW(window,WM_COMMAND,27,0);
        wchar_t windowTitle[128]{}; GetWindowTextW(window,windowTitle,128);
        require(std::wstring(windowTitle)==ks::localBuildTitle(L"KSwitcher — Screenshot #1"),"title includes editor index and local build marker without usage hints");
        RECT client{}; GetClientRect(window,&client);
        require(c.view.bottom<=client.bottom-c.statusHeight,"image does not overlap status bar");
        ks::updateStatus(c);
        require(c.statusText.find(L"Pointer")!=std::wstring::npos,"default tool hint is shown");
        SendMessageW(GetDlgItem(window,13),WM_MOUSEMOVE,0,0);
        require(c.statusText.find(L"Ctrl+C")!=std::wstring::npos,"button hover shows action shortcut");
        SendMessageW(GetDlgItem(window,13),WM_MOUSELEAVE,0,0);
        require(c.statusText.find(L"Pointer")!=std::wstring::npos,"button leave restores contextual hint");
        for(int id:ks::ToolIds) require(GetDlgItem(window,id)!=nullptr,"all toolbar buttons created");
        require(GetDlgItem(window,34)!=nullptr && c.toolIcons[0][14]!=nullptr,"font icon created and loaded");
        ks::Mark text{{20,20},{20,20},0}; text.fontSize=18;
        ks::beginInlineText(window,c,text,-1);
        require(c.inlineText!=nullptr,"inline text control opens");
        ks::updateStatus(c);
        require(c.statusText.find(L"Ctrl+Enter")!=std::wstring::npos,"inline editing hint shows commit and cancel keys");
        SendMessageW(c.inlineText,EM_REPLACESEL,TRUE,(LPARAM)L"First line\r\nДругий рядок");
        require(c.textDraft.text==L"First line\r\nДругий рядок","inline text changes update draft");
        SendMessageW(window,ks::FinishTextMessage,1,(LPARAM)c.inlineText);
        require(!c.inlineText && c.marks.size()==1 && c.marks[0].text==text.text+L"First line\r\nДругий рядок","commit adds multiline text");
        ks::beginInlineText(window,c,c.marks[0],0);
        SendMessageW(c.inlineText,EM_REPLACESEL,TRUE,(LPARAM)L"Cancelled");
        SendMessageW(window,ks::FinishTextMessage,2,(LPARAM)c.inlineText);
        require(c.marks[0].text!=L"Cancelled","Escape cancels changes");
        SendMessageW(window,WM_KEYDOWN,VK_F2,0);
        require(c.inlineText!=nullptr,"F2 edits inline");
        SendMessageW(c.inlineText,EM_REPLACESEL,TRUE,(LPARAM)L"Edited"); ks::finishInlineText(window,c,true);
        require(c.marks[0].text==L"Edited","existing text edit commits");
        SendMessageW(window,WM_COMMAND,12,0);
        require(c.marks[0].text!=L"Edited","undo restores original text");
        SendMessageW(window,WM_COMMAND,18,0);
        require(c.marks[0].text==L"Edited","redo restores text edit");
        ks::beginInlineText(window,c,c.marks[0],0);
        SendMessageW(c.inlineText,EM_REPLACESEL,TRUE,(LPARAM)L""); ks::finishInlineText(window,c,true);
        require(c.marks.empty(),"committing empty text deletes object");
        c.marks.push_back({{30,150},{260,150},0}); c.selected=0;
        SendMessageW(window,WM_COMMAND,35,0);
        require(c.inlineText && c.editingLabel,"label button opens inline editor");
        SendMessageW(c.inlineText,EM_REPLACESEL,TRUE,(LPARAM)L"Arrow caption");
        ks::finishInlineText(window,c,true);
        require(c.marks.size()==1 && c.marks[0].label==L"Arrow caption" && c.marks[0].isLine(),"label attaches to arrow");
        SendMessageW(window,WM_KEYDOWN,VK_F2,0);
        require(c.inlineText && c.editingLabel,"F2 edits arrow caption");
        SendMessageW(c.inlineText,EM_REPLACESEL,TRUE,(LPARAM)L""); ks::finishInlineText(window,c,true);
        require(c.marks.size()==1 && c.marks[0].label.empty(),"empty label removes caption without deleting arrow");
        SendMessageW(window,WM_COMMAND,12,0);
        require(c.marks[0].label==L"Arrow caption","undo restores arrow caption");
        auto caption=ks::screenshotArrowLabel(c.marks[0]);
        auto captionGrip=ks::screenshotTextRotationHandle(caption,double(c.unit*0.6)*c.image->width/(c.view.right-c.view.left));
        c.selected=0;
        require(ks::markAt(c,captionGrip).second==ks::MarkPart::Rotation,"caption rotation handle is interactive");
        c.marks[0]=ks::dragScreenshotMark(c.marks[0],ks::MarkPart::Rotation,captionGrip,{captionGrip.x+40,captionGrip.y+20},320,240,true);
        auto angle=c.marks[0].rotation;
        SendMessageW(window,WM_KEYDOWN,VK_F2,0);
        SendMessageW(c.inlineText,EM_REPLACESEL,TRUE,(LPARAM)L"Rotated caption"); ks::finishInlineText(window,c,true);
        require(c.marks[0].rotation==angle && c.marks[0].label==L"Rotated caption","editing caption preserves its rotation");
        auto rotating=text; rotating.text=L"Rotate"; c.marks.push_back(rotating); c.selected=1;
        auto handle=ks::screenshotTextRotationHandle(rotating,double(c.unit*0.6)*c.image->width/(c.view.right-c.view.left));
        require(ks::markAt(c,handle).second==ks::MarkPart::Rotation,"rotation handle is interactive");
        c.hoveredPart=ks::MarkPart::Rotation; ks::updateStatus(c);
        require(c.statusText.find(L"15-degree")!=std::wstring::npos,"rotation hint explains Shift snapping");
        c.hoveredPart=ks::MarkPart::None;
        // Drag the two badges in turn, including a click near the attached endpoint.
        for(bool freehand : {false,true}) for(auto ends : {ks::LineEnds::End,ks::LineEnds::None}) {
            c.marks={{{60,80},{60,80},1},{{230,80},{230,80},2},{{60,80},{230,80},0}};
            auto &connector=c.marks[2]; connector.fromNumber=1; connector.toNumber=2;
            connector.ends=ends; connector.freehand=freehand;
            if(freehand) connector.points={{60,80},{140,80},{230,80}};
            ks::resolveScreenshotLinks(c.marks); c.selected=-1; c.selectedLabel=false;
            auto mouse=[&](UINT message,POINT p) {
                LONG x=c.view.left+MulDiv(p.x,c.view.right-c.view.left,c.image->width);
                LONG y=c.view.top+MulDiv(p.y,c.view.bottom-c.view.top,c.image->height);
                SendMessageW(window,message,message==WM_LBUTTONUP?0:MK_LBUTTON,MAKELPARAM(x,y));
            };
            for(int badge : {0,1,0,1}) {
                auto origin=c.marks[badge].from;
                // The second badge's inner edge overlaps the connector endpoint hit area.
                if(badge==1) origin.x-=12;
                mouse(WM_LBUTTONDOWN,origin);
                require(c.selected==badge && c.part==ks::MarkPart::Body,"click on linked badge selects badge instead of connector endpoint");
                mouse(WM_MOUSEMOVE,{origin.x,origin.y+20});
                mouse(WM_LBUTTONUP,{origin.x,origin.y+20});
                require(c.marks[2].fromNumber==1 && c.marks[2].toNumber==2,"alternating badge drags preserve both connector links");
                auto start=c.marks[0].from,end=c.marks[1].from;
                require(std::abs(std::hypot(double(c.marks[2].from.x-start.x),double(c.marks[2].from.y-start.y))-15)<1 &&
                        std::abs(std::hypot(double(c.marks[2].to.x-end.x),double(c.marks[2].to.y-end.y))-15)<1,
                        "connector endpoints follow both badge rims");
            }
            // Selecting a linked connector (also the first click of a double-click)
            // must not detach it before opening its caption editor.
            for(int entry : {0,1,2}) {
                c.selected=-1;
                POINT body{110,c.marks[0].from.y};
                if(freehand) body={(c.marks[2].points[0].x+c.marks[2].points[1].x)/2,
                                   (c.marks[2].points[0].y+c.marks[2].points[1].y)/2};
                mouse(WM_LBUTTONDOWN,body); mouse(WM_LBUTTONUP,body);
                require(c.selected==2 && c.marks[2].fromNumber==1 && c.marks[2].toNumber==2,
                        "clicking a connector without moving preserves both links");
                if(entry==0) { mouse(WM_LBUTTONDBLCLK,body); mouse(WM_LBUTTONUP,body); }
                else if(entry==1) SendMessageW(window,WM_KEYDOWN,VK_F2,0);
                else SendMessageW(window,WM_COMMAND,35,0);
                require(c.inlineText && c.editingLabel,"linked connector caption opens through every entry point");
                SendMessageW(c.inlineText,EM_REPLACESEL,TRUE,(LPARAM)L"Linked caption");
                ks::finishInlineText(window,c,true);
                require(c.marks[2].label==L"Linked caption" && c.marks[2].fromNumber==1 && c.marks[2].toNumber==2,
                        "adding or editing a caption preserves both connector links");
            }
            c.selected=2;
            require(ks::markAt(c,c.marks[1].from).first==1,"selected connector cannot steal a badge click");
            auto outside=c.marks[2].to; outside.x-=4;
            require(ks::markAt(c,outside)==std::pair{2,ks::MarkPart::End},"endpoint remains draggable outside badge");
        }
        {
            auto mouse=[&](UINT message,POINT p) {
                LONG x=c.view.left+MulDiv(p.x,c.view.right-c.view.left,c.image->width);
                LONG y=c.view.top+MulDiv(p.y,c.view.bottom-c.view.top,c.image->height);
                SendMessageW(window,message,message==WM_LBUTTONUP?0:MK_LBUTTON,MAKELPARAM(x,y));
            };
            SendMessageW(window,WM_COMMAND,27,0); c.marks.clear();
            mouse(WM_LBUTTONDOWN,{40,160}); mouse(WM_MOUSEMOVE,{100,190}); mouse(WM_LBUTTONUP,{100,190});
            require(c.marks.empty() && !c.dragging && c.selected==-1,"pointer drag on empty canvas never adds an object");
            for(int tool : {11,22}) for(int target : {0,1,2}) {
                if(target==0) c.marks={{{55,160},{55,160},1},{{255,160},{255,160},2}};
                else {
                    c.marks={{{30,140},{80,190},0},{{230,140},{280,190},0}};
                    if(target==1) for(auto &mark:c.marks) mark.shape=ks::ScreenshotShape::Rectangle;
                    else for(auto &mark:c.marks) mark.from.y=mark.to.y=160;
                }
                SendMessageW(window,WM_COMMAND,tool,0);
                BYTE savedKeys[256]{},drawingKeys[256]{};
                require(GetKeyboardState(savedKeys)!=FALSE,"read thread keyboard state");
                std::copy(savedKeys,savedKeys+256,drawingKeys); drawingKeys[VK_CONTROL]=0x80;
                require(SetKeyboardState(drawingKeys)!=FALSE,"set thread-local Ctrl for drawing test");
                mouse(WM_LBUTTONDOWN,{55,160}); mouse(WM_MOUSEMOVE,{255,160}); mouse(WM_LBUTTONUP,{255,160});
                SetKeyboardState(savedKeys);
                require(c.marks.size()==3,"drawing over existing objects creates a connector with Ctrl");
                auto &connector=c.marks[2];
                require(target==0?(connector.fromNumber==1 && connector.toNumber==2):
                        (connector.fromLink.target==c.marks[0].id && connector.toLink.target==c.marks[1].id),
                        "new arrow or line automatically attaches both endpoints to targets");
                require(connector.ends==(tool==11?c.arrowEnds:ks::LineEnds::None),"arrow and straight-line tools retain their end styles");
                auto before=connector.from;
                SendMessageW(window,WM_KEYDOWN,'V',0);
                require(c.pointer && !c.arrow && !c.freehand,"V selects pointer mode");
                POINT body=target==0?POINT{55,160}:target==1?POINT{30,175}:POINT{30,160};
                mouse(WM_LBUTTONDOWN,body); mouse(WM_MOUSEMOVE,{body.x,body.y-20}); mouse(WM_LBUTTONUP,{body.x,body.y-20});
                require(c.selected==0 && c.marks.size()==3 && c.marks[2].from.y<before.y,
                        "pointer moves the target and the new connector follows without adding objects");
                mouse(WM_LBUTTONDOWN,{150,220}); mouse(WM_LBUTTONUP,{150,220});
                require(c.selected==-1 && c.marks.size()==3,"pointer click on empty space only clears selection");
            }
        }
        for(bool manualAngle : {false,true}) {
            c.marks={{{40,140},{180,60},0}}; c.selected=0;
            c.marks[0].fontSize=18; c.marks[0].fontWeight=FW_BOLD;
            c.marks[0].rotation=31; c.marks[0].labelRotationManual=manualAngle;
            SendMessageW(window,WM_COMMAND,35,0);
            SendMessageW(c.inlineText,EM_REPLACESEL,TRUE,(LPARAM)L"Sloped caption");
            ks::finishInlineText(window,c,true);
            auto captionAngle=ks::screenshotArrowLabel(c.marks[0]).rotation;
            require(captionAngle!=0,"caption retains its automatic or manual angle");
            SendMessageW(window,WM_COMMAND,26,0);
            LONG x=c.view.left+MulDiv(220,c.view.right-c.view.left,c.image->width);
            LONG y=c.view.top+MulDiv(190,c.view.bottom-c.view.top,c.image->height);
            SendMessageW(window,WM_LBUTTONDOWN,MK_LBUTTON,MAKELPARAM(x,y));
            require(c.inlineText && !c.editingLabel,"standalone text starts independently of caption");
            SendMessageW(c.inlineText,EM_REPLACESEL,TRUE,(LPARAM)L"Independent text");
            ks::finishInlineText(window,c,true);
            require(c.marks.size()==2 && c.marks[1].isText() && c.marks[1].rotation==0,
                    "new standalone text does not inherit caption rotation");
            require(c.marks[1].fontSize==18 && c.marks[1].fontWeight==FW_BOLD,
                    "new text still inherits font styling");
            require(ks::screenshotArrowLabel(c.marks[0]).rotation==captionAngle,"new text does not change caption angle");
            c.marks[1].rotation=22; c.selected=1;
            SendMessageW(window,WM_KEYDOWN,VK_F2,0);
            SendMessageW(c.inlineText,EM_REPLACESEL,TRUE,(LPARAM)L"Edited standalone text");
            ks::finishInlineText(window,c,true);
            require(c.marks[1].rotation==22,"editing existing rotated text preserves its own angle");
            SendMessageW(window,WM_COMMAND,27,0);
        }
        std::vector<ks::Mark> nudgeMarks;
        nudgeMarks.push_back({{60,60},{60,60},1});
        nudgeMarks.push_back({{60,60},{120,100},0});
        auto nudgeText=text; nudgeText.text=L"Move"; nudgeText.from=nudgeText.to={60,60}; nudgeMarks.push_back(nudgeText);
        for(auto shape:{ks::ScreenshotShape::Rectangle,ks::ScreenshotShape::Circle,ks::ScreenshotShape::Ellipse}) {
            ks::Mark mark{{60,60},{100,100},0}; mark.shape=shape; nudgeMarks.push_back(mark);
        }
        for(bool freehand:{false,true}) {
            ks::Mark mark{{60,60},{120,100},0}; mark.points={{60,60},{90,80},{120,100}}; mark.freehand=freehand;
            nudgeMarks.push_back(mark);
        }
        for(auto mark:nudgeMarks) {
            c.marks={mark}; c.selected=0; c.selectedLabel=false;
            SendMessageW(window,WM_KEYDOWN,VK_RIGHT,0); SendMessageW(window,WM_KEYDOWN,VK_DOWN,0);
            require(c.marks[0].from.x==61 && c.marks[0].from.y==61,"every object nudges one pixel per key");
            if(!mark.points.empty()) require(c.marks[0].points[1].x==91 && c.marks[0].points[1].y==81,"nudge moves entire stroke");
            SendMessageW(window,WM_KEYDOWN,VK_LEFT,0); SendMessageW(window,WM_KEYDOWN,VK_UP,0);
            require(c.marks[0].from.x==60 && c.marks[0].from.y==60,"opposite keys restore original position");
        }
        ks::Mark nudgeArrow{{60,60},{140,140},0}; nudgeArrow.label=L"Caption"; nudgeArrow.fontSize=12;
        c.marks={nudgeArrow}; c.selected=0; c.selectedLabel=true;
        auto beforeNudge=ks::screenshotTextBounds(ks::screenshotArrowLabel(c.marks[0]));
        for(int i=0;i<5;++i) SendMessageW(window,WM_KEYDOWN,VK_RIGHT,0);
        auto afterNudge=ks::screenshotTextBounds(ks::screenshotArrowLabel(c.marks[0]));
        require(afterNudge.left==beforeNudge.left+5 && afterNudge.top==beforeNudge.top,
                "caption nudges exact screen pixels at a diagonal angle");
        require(c.marks[0].from.x==60 && !c.marks[0].labelRotationManual,"caption nudge leaves arrow and automatic angle intact");
        SendMessageW(window,WM_COMMAND,12,0);
        require(ks::screenshotTextBounds(ks::screenshotArrowLabel(c.marks[0])).left==beforeNudge.left+4,"undo reverses one nudge");
        SendMessageW(window,WM_COMMAND,18,0);
        require(ks::screenshotTextBounds(ks::screenshotArrowLabel(c.marks[0])).left==beforeNudge.left+5,"redo restores one nudge");
        SetWindowPos(window,nullptr,80,60,720,500,SWP_NOZORDER|SWP_SHOWWINDOW);
        ks::copy(window,c,[](HWND,const ks::Clip &clip)->DWORD {
            if(clip.formats.empty()) throw std::runtime_error("copy produced no image");
            return 0;
        });
        require(IsWindow(window) && c.copied,"copy publishes screenshot and keeps editor open");
        c.selected=0; c.selectedLabel=false;
        SendMessageW(window,WM_KEYDOWN,VK_RIGHT,0);
        require(!c.copied,"editing after copy requires confirmation again");
        c.copied=true; SendMessageW(window,WM_COMMAND,12,0);
        require(!c.copied,"undo after copy requires confirmation again");
        c.copied=true; SendMessageW(window,WM_COMMAND,18,0);
        require(!c.copied,"redo after copy requires confirmation again");
        SetPropW(window,L"ConfirmationCentered",nullptr);
        SetTimer(window,987,10,[](HWND owner,UINT,UINT_PTR id,DWORD) {
            EnumThreadWindows(GetCurrentThreadId(),[](HWND popup,LPARAM parent)->BOOL {
                wchar_t className[64]{}; GetClassNameW(popup,className,64);
                if(GetWindow(popup,GW_OWNER)==(HWND)parent && std::wstring(className)==L"#32770") {
                    RECT ownerRect{},popupRect{};
                    GetWindowRect((HWND)parent,&ownerRect); GetWindowRect(popup,&popupRect);
                    if(std::abs(ownerRect.left+ownerRect.right-popupRect.left-popupRect.right)<=4 &&
                       std::abs(ownerRect.top+ownerRect.bottom-popupRect.top-popupRect.bottom)<=4)
                        SetPropW((HWND)parent,L"ConfirmationCentered",(HANDLE)1);
                    PostMessageW(popup,TDM_CLICK_BUTTON,IDNO,0);
                }
                return TRUE;
            },(LPARAM)owner);
            KillTimer(owner,id);
        });
        SendMessageW(window,WM_CLOSE,0,0);
        require(IsWindow(window),"declining close confirmation keeps the screenshot open");
        require(GetPropW(window,L"ConfirmationCentered")!=nullptr,"confirmation is centered on editor instead of screen");
        RemovePropW(window,L"ConfirmationCentered");
        c.copied=true;
        SendMessageW(window,WM_KEYDOWN,VK_ESCAPE,0);
        require(IsWindow(window),"Escape does not close the screenshot editor");
        SendMessageW(window,WM_CLOSE,0,0);
        require(!IsWindow(window),"copied screenshot closes without confirmation");
        static bool published=false;
        static bool notificationAccepted=false;
        static HWND notificationWindow{};
        static bool expectHidden=false;
        app.notify=[](const ks::Clip &) {
            if(!published) throw std::runtime_error("notification preceded clipboard publication");
            if(expectHidden && IsWindowVisible(notificationWindow))
                throw std::runtime_error("selection overlay is still visible when notification is sent");
            return notificationAccepted;
        };
        for(bool autoOpen : {true,false}) for (bool accepted : {true, false}) {
            app.autoOpenEditor=autoOpen;
            published=false;
            notificationAccepted=accepted;
            ks::Capture selection(app);
            selection.image=std::make_unique<ks::Surface>(100,100);
            PatBlt(selection.image->dc,0,0,100,100,WHITENESS);
            selection.start={10,20}; selection.end={70,60};
            auto overlay=CreateWindowW(cls.lpszClassName,L"Selection test",WS_POPUP,0,0,100,100,app.window,nullptr,app.instance,&selection);
            notificationWindow=overlay; expectHidden=!autoOpen;
            ShowWindow(overlay,SW_SHOWNOACTIVATE);
            ks::finishSelection(overlay,selection,[](HWND,const ks::Clip &clip)->DWORD {
                auto pixels=ks::decodeImage(clip);
                if(pixels.width!=60 || pixels.height!=40) throw std::runtime_error("automatic copy did not crop selection");
                published=true; return 0;
            });
            if(!autoOpen && accepted) {
                require(published && !IsWindow(overlay),"notification-first closes selection after successful submission");
                continue;
            }
            require(published && selection.copied && IsWindowVisible(overlay) && selection.editing,
                    "selection opens editor whether notification is accepted or rejected");
            require(selection.image->width==60 && selection.image->height==40,
                    "automatically opened editor contains the selected region");
            SendMessageW(overlay,WM_CLOSE,0,0);
            require(!IsWindow(overlay),"automatically copied screenshot closes without confirmation");
        }
        DestroyWindow(app.window); app.window=nullptr;
        CoUninitialize();
        std::cout<<"Passed screenshot editor UI integration checks\n";
    } catch(const std::exception &e) { std::cerr<<e.what()<<'\n'; return 1; }
}