#include<Windows.h>
#include<thread>
#include<mutex>
#include<Shlwapi.h>
#include<filesystem>
#include<queue>
#include"pluginmanager.h"
#include"lockedqueue.hpp"
#ifndef _WIN64
#define THISCALL __thiscall
#define _CDECL __cdecl
#define fnQString_fromStdWString "?fromStdWString@QString@@SA?AV1@ABV?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@@Z"
#define fnQCoreApplication_addLibraryPath "?addLibraryPath@QCoreApplication@@SAXABVQString@@@Z"
#define fnQString_dtor "??1QString@@QAE@XZ"
#define fnQApplication_ctor "??0QApplication@@QAE@AAHPAPADH@Z"
#define fnQFont_ctor "??0QFont@@QAE@ABVQString@@HH_N@Z"
#define fnQApplication_setFont "?setFont@QApplication@@SAXABVQFont@@PBD@Z"
#define fnQFont_dtor "??1QFont@@QAE@XZ"
#define fnQApplication_exec "?exec@QApplication@@SAHXZ"
#define fnQApplication_dtor "??1QApplication@@UAE@XZ"
#else
#define THISCALL __fastcall
#define _CDECL __fastcall
#define fnQString_fromStdWString "?fromStdWString@QString@@SA?AV1@AEBV?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@@Z"
#define fnQCoreApplication_addLibraryPath "?addLibraryPath@QCoreApplication@@SAXAEBVQString@@@Z"
#define fnQString_dtor "??1QString@@QEAA@XZ"
#define fnQApplication_ctor "??0QApplication@@QEAA@AEAHPEAPEADH@Z"
#define fnQFont_ctor "??0QFont@@QEAA@AEBVQString@@HH_N@Z"
#define fnQApplication_setFont "?setFont@QApplication@@SAXAEBVQFont@@PEBD@Z"
#define fnQFont_dtor "??1QFont@@QEAA@XZ"
#define fnQApplication_exec "?exec@QApplication@@SAHXZ"
#define fnQApplication_dtor "??1QApplication@@UEAA@XZ"
#endif
#define fnQApplication_processEvents "?processEvents@QCoreApplication@@SAXV?$QFlags@W4ProcessEventsFlag@QEventLoop@@@@@Z"


FARPROC QString_fromStdWString,QCoreApplication_addLibraryPath,QString_dtor,QApplication_ctor,QFont_ctor,QFont_dtor,QApplication_setFont,QApplication_exec,QApplication_dtor,QApplication_processEvents;


bool checkqterror(){
    return QString_fromStdWString==0||QCoreApplication_addLibraryPath==0||QString_dtor==0||QApplication_ctor==0||QFont_ctor==0||QFont_dtor==0||QApplication_setFont==0||QApplication_exec==0||QApplication_dtor==0||QApplication_processEvents==0;
}
void loadqtdlls(){
    QString_fromStdWString=QCoreApplication_addLibraryPath=QString_dtor=QApplication_ctor=QFont_ctor=QFont_dtor=QApplication_setFont=QApplication_exec=QApplication_dtor=QApplication_processEvents=0;

    auto Qt5Widgets=LoadLibrary(L"Qt5Widgets.dll");
    auto Qt5Gui=LoadLibrary(L"Qt5Gui.dll");
    auto Qt5Core=LoadLibrary(L"Qt5Core.dll");
    if(Qt5Core==0||Qt5Gui==0||Qt5Widgets==0)return;
    
    QString_fromStdWString=GetProcAddress(Qt5Core,fnQString_fromStdWString);
    QCoreApplication_addLibraryPath=GetProcAddress(Qt5Core,fnQCoreApplication_addLibraryPath);
    QString_dtor=GetProcAddress(Qt5Core,fnQString_dtor);
    QApplication_ctor=GetProcAddress(Qt5Widgets,fnQApplication_ctor);
    QFont_ctor=GetProcAddress(Qt5Gui,fnQFont_ctor);
    QFont_dtor=GetProcAddress(Qt5Gui,fnQFont_dtor);
    QApplication_setFont=GetProcAddress(Qt5Widgets,fnQApplication_setFont);
    QApplication_exec=GetProcAddress(Qt5Widgets,fnQApplication_exec);
    QApplication_dtor=GetProcAddress(Qt5Widgets,fnQApplication_dtor);
    QApplication_processEvents=GetProcAddress(Qt5Core,fnQApplication_processEvents);
}
struct info{
    int type;
    std::wstring dll;
    HMODULE hdll;
};
lockedqueue<info>waitingtask;
lockedqueue<HMODULE>waitingresult;

extern "C" __declspec(dllexport) void QtStartUp(std::vector<std::wstring>* dlls){
    
    static bool once=false;
    if(once)return;
    loadqtdlls();    
    once=!checkqterror();
    if(!once)return;
    std::thread([=](){
        static void* qapp;  //必须static
        void* qstring;
        void* qfont;
        for(int i=0;i<dlls->size();i++){
            auto dirname=std::filesystem::path(dlls->at(i)).parent_path().wstring();
            ((void* (_CDECL*)(void*,void*))QString_fromStdWString)(&qstring,&dirname);
            ((void(_CDECL *)(void*))QCoreApplication_addLibraryPath)(&qstring);
            ((void(THISCALL*)(void*))QString_dtor)(&qstring);
            //QCoreApplication_addLibraryPath(QString_fromStdWString(std::filesystem::path(collectQtplugs[i]).parent_path()));
        }
        
        int _=0;
        ((void*(THISCALL*)(void*,int*,char**,int))QApplication_ctor)(&qapp,&_,0,331266);
        
        std::wstring font=L"MS Shell Dlg 2";
        ((void* (_CDECL*)(void*,void*))QString_fromStdWString)(&qstring,&font);
        ((void*(THISCALL*)(void*,void*,int,int,bool))QFont_ctor)(&qfont,&qstring,10,-1,0);
        ((void(_CDECL*)(void*,void*))QApplication_setFont)(&qfont,0);
        ((void(THISCALL*)(void*))QFont_dtor)(&qfont);
        ((void(THISCALL*)(void*))QString_dtor)(&qstring);
        
        while(true)
        {
            if(!waitingtask.empty())
            {
                auto top=waitingtask.pop();
                if(top.type==1)
                {
                    waitingresult.push(LoadLibraryW(top.dll.c_str()));
                }
                else if(top.type==2)
                {
                    FreeLibrary(top.hdll);
                }
            }
            ((void(_CDECL*)(DWORD))QApplication_processEvents)(0);
            Sleep(1);
        }
        
        // ((void(*)())QApplication_exec)();
        
        // ((void(THISCALL*)(void*))QApplication_dtor)(&qapp);
        
    }).detach();
    
}
std::mutex loadmutex;

extern "C" __declspec(dllexport) std::vector<HMODULE>* QtLoadLibraryBatch(std::vector<std::wstring>* dlls){
    std::lock_guard _(loadmutex);
    QtStartUp(dlls);
    auto hdlls=new std::vector<HMODULE>;
    for(int i=0;i<dlls->size();i++){
        if(checkqterror()){
            hdlls->push_back(0);
        }
        else{
            waitingtask.push({1,dlls->at(i)});
            hdlls->push_back(waitingresult.pop());
        }
        
    }
    return hdlls;
}


extern "C" __declspec(dllexport) void QtFreeLibrary(HMODULE hd){
    std::lock_guard _(loadmutex);
    waitingtask.push({2,L"",hd});
}