/*
 * Copyright 2015 Jacek Caban for CodeWeavers
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#define COBJMACROS

#include "windows.h"
#include "initguid.h"
#include "ole2.h"
#include "rpcproxy.h"
#include "msscript.h"

#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(msscript);

struct ScriptControl {
    IScriptControl IScriptControl_iface;
    LONG ref;
};

static HINSTANCE msscript_instance;

static inline void * __WINE_ALLOC_SIZE(1) heap_alloc(size_t len)
{
    return HeapAlloc(GetProcessHeap(), 0, len);
}

static inline BOOL heap_free(void *mem)
{
    return HeapFree(GetProcessHeap(), 0, mem);
}

typedef enum tid_t {
    IScriptControl_tid,
    LAST_tid
} tid_t;

static ITypeLib *typelib;
static ITypeInfo *typeinfos[LAST_tid];

static REFIID tid_ids[] = {
    &IID_IScriptControl
};

static HRESULT load_typelib(void)
{
    HRESULT hres;
    ITypeLib *tl;

    hres = LoadRegTypeLib(&LIBID_MSScriptControl, 1, 0, LOCALE_SYSTEM_DEFAULT, &tl);
    if(FAILED(hres)) {
        ERR("LoadRegTypeLib failed: %08x\n", hres);
        return hres;
    }

    if(InterlockedCompareExchangePointer((void**)&typelib, tl, NULL))
        ITypeLib_Release(tl);
    return hres;
}

static HRESULT get_typeinfo(tid_t tid, ITypeInfo **typeinfo)
{
    HRESULT hres;

    if (!typelib)
        hres = load_typelib();
    if (!typelib)
        return hres;

    if(!typeinfos[tid]) {
        ITypeInfo *ti;

        hres = ITypeLib_GetTypeInfoOfGuid(typelib, tid_ids[tid], &ti);
        if(FAILED(hres)) {
            ERR("GetTypeInfoOfGuid(%s) failed: %08x\n", debugstr_guid(tid_ids[tid]), hres);
            return hres;
        }

        if(InterlockedCompareExchangePointer((void**)(typeinfos+tid), ti, NULL))
            ITypeInfo_Release(ti);
    }

    *typeinfo = typeinfos[tid];
    ITypeInfo_AddRef(typeinfos[tid]);
    return S_OK;
}

static void release_typelib(void)
{
    unsigned i;

    if(!typelib)
        return;

    for(i=0; i < sizeof(typeinfos)/sizeof(*typeinfos); i++)
        if(typeinfos[i])
            ITypeInfo_Release(typeinfos[i]);

    ITypeLib_Release(typelib);
}

static inline ScriptControl *impl_from_IScriptControl(IScriptControl *iface)
{
    return CONTAINING_RECORD(iface, ScriptControl, IScriptControl_iface);
}

static HRESULT WINAPI ScriptControl_QueryInterface(IScriptControl *iface, REFIID riid, void **ppv)
{
    ScriptControl *This = impl_from_IScriptControl(iface);

    if(IsEqualGUID(&IID_IUnknown, riid)) {
        TRACE("(%p)->(IID_IUnknown %p)\n", This, ppv);
        *ppv = &This->IScriptControl_iface;
    }else if(IsEqualGUID(&IID_IDispatch, riid)) {
        TRACE("(%p)->(IID_IDispatch %p)\n", This, ppv);
        *ppv = &This->IScriptControl_iface;
    }else if(IsEqualGUID(&IID_IScriptControl, riid)) {
        TRACE("(%p)->(IID_IScriptControl %p)\n", This, ppv);
        *ppv = &This->IScriptControl_iface;
    }else {
        FIXME("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppv);
        *ppv = NULL;
        return E_NOINTERFACE;
    }

    IUnknown_AddRef((IUnknown*)*ppv);
    return S_OK;
}

static ULONG WINAPI ScriptControl_AddRef(IScriptControl *iface)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    LONG ref = InterlockedIncrement(&This->ref);

    TRACE("(%p) ref=%d\n", This, ref);

    return ref;
}

static ULONG WINAPI ScriptControl_Release(IScriptControl *iface)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    LONG ref = InterlockedDecrement(&This->ref);

    TRACE("(%p) ref=%d\n", This, ref);

    if(!ref)
        heap_free(This);

    return ref;
}

static HRESULT WINAPI ScriptControl_GetTypeInfoCount(IScriptControl *iface, UINT *pctinfo)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    TRACE("(%p)->(%p)\n", This, pctinfo);
    *pctinfo = 1;
    return S_OK;
}

static HRESULT WINAPI ScriptControl_GetTypeInfo(IScriptControl *iface, UINT iTInfo,
        LCID lcid, ITypeInfo **ppTInfo)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    TRACE("(%p)->(%u %u %p)\n", This, iTInfo, lcid, ppTInfo);
    return get_typeinfo(IScriptControl_tid, ppTInfo);
}

static HRESULT WINAPI ScriptControl_GetIDsOfNames(IScriptControl *iface, REFIID riid,
        LPOLESTR *rgszNames, UINT cNames, LCID lcid, DISPID *rgDispId)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    ITypeInfo *typeinfo;
    HRESULT hres;

    TRACE("(%p)->(%s %p %u %u %p)\n", This, debugstr_guid(riid), rgszNames, cNames, lcid, rgDispId);

    hres = get_typeinfo(IScriptControl_tid, &typeinfo);
    if(SUCCEEDED(hres)) {
        hres = ITypeInfo_GetIDsOfNames(typeinfo, rgszNames, cNames, rgDispId);
        ITypeInfo_Release(typeinfo);
    }

    return hres;
}

static HRESULT WINAPI ScriptControl_Invoke(IScriptControl *iface, DISPID dispIdMember,
        REFIID riid, LCID lcid, WORD wFlags, DISPPARAMS *pDispParams, VARIANT *pVarResult,
        EXCEPINFO *pExcepInfo, UINT *puArgErr)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    ITypeInfo *typeinfo;
    HRESULT hres;

    TRACE("(%p)->(%d %s %d %d %p %p %p %p)\n", This, dispIdMember, debugstr_guid(riid),
           lcid, wFlags, pDispParams, pVarResult, pExcepInfo, puArgErr);

    hres = get_typeinfo(IScriptControl_tid, &typeinfo);
    if(SUCCEEDED(hres)) {
        hres = ITypeInfo_Invoke(typeinfo, iface, dispIdMember, wFlags,
                pDispParams, pVarResult, pExcepInfo, puArgErr);
        ITypeInfo_Release(typeinfo);
    }

    return hres;
}

static HRESULT WINAPI ScriptControl_get_Language(IScriptControl *iface, BSTR *p)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%p)\n", This, p);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_put_Language(IScriptControl *iface, BSTR language)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%s)\n", This, debugstr_w(language));
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_get_State(IScriptControl *iface, ScriptControlStates *p)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%p)\n", This, p);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_put_State(IScriptControl *iface, ScriptControlStates state)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%x)\n", This, state);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_put_SitehWnd(IScriptControl *iface, LONG hwnd)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%x)\n", This, hwnd);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_get_SitehWnd(IScriptControl *iface, LONG *p)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%p)\n", This, p);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_get_Timeout(IScriptControl *iface, LONG *p)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%p)\n", This, p);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_put_Timeout(IScriptControl *iface, LONG milliseconds)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%d)\n", This, milliseconds);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_get_AllowUI(IScriptControl *iface, VARIANT_BOOL *p)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%p)\n", This, p);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_put_AllowUI(IScriptControl *iface, VARIANT_BOOL allow_ui)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%x)\n", This, allow_ui);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_get_UseSafeSubset(IScriptControl *iface, VARIANT_BOOL *p)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%p)\n", This, p);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_put_UseSafeSubset(IScriptControl *iface, VARIANT_BOOL v)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%x)\n", This, v);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_get_Modules(IScriptControl *iface, IScriptModuleCollection **p)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%p)\n", This, p);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_get_Error(IScriptControl *iface, IScriptError **p)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%p)\n", This, p);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_get_CodeObject(IScriptControl *iface, IDispatch **p)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%p)\n", This, p);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_get_Procedures(IScriptControl *iface, IScriptProcedureCollection **p)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%p)\n", This, p);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl__AboutBox(IScriptControl *iface)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)\n", This);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_AddObject(IScriptControl *iface, BSTR name, IDispatch *object, VARIANT_BOOL add_members)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%s %p %x)\n", This, debugstr_w(name), object, add_members);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_Reset(IScriptControl *iface)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)\n", This);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_AddCode(IScriptControl *iface, BSTR code)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%s)\n", This, debugstr_w(code));
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_Eval(IScriptControl *iface, BSTR expression, VARIANT *res)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%s %p)\n", This, debugstr_w(expression), res);
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_ExecuteStatement(IScriptControl *iface, BSTR statement)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%s)\n", This, debugstr_w(statement));
    return E_NOTIMPL;
}

static HRESULT WINAPI ScriptControl_Run(IScriptControl *iface, BSTR procedure_name, SAFEARRAY **parameters, VARIANT *res)
{
    ScriptControl *This = impl_from_IScriptControl(iface);
    FIXME("(%p)->(%s %p %p)\n", This, debugstr_w(procedure_name), parameters, res);
    return E_NOTIMPL;
}

static const IScriptControlVtbl ScriptControlVtbl = {
    ScriptControl_QueryInterface,
    ScriptControl_AddRef,
    ScriptControl_Release,
    ScriptControl_GetTypeInfoCount,
    ScriptControl_GetTypeInfo,
    ScriptControl_GetIDsOfNames,
    ScriptControl_Invoke,
    ScriptControl_get_Language,
    ScriptControl_put_Language,
    ScriptControl_get_State,
    ScriptControl_put_State,
    ScriptControl_put_SitehWnd,
    ScriptControl_get_SitehWnd,
    ScriptControl_get_Timeout,
    ScriptControl_put_Timeout,
    ScriptControl_get_AllowUI,
    ScriptControl_put_AllowUI,
    ScriptControl_get_UseSafeSubset,
    ScriptControl_put_UseSafeSubset,
    ScriptControl_get_Modules,
    ScriptControl_get_Error,
    ScriptControl_get_CodeObject,
    ScriptControl_get_Procedures,
    ScriptControl__AboutBox,
    ScriptControl_AddObject,
    ScriptControl_Reset,
    ScriptControl_AddCode,
    ScriptControl_Eval,
    ScriptControl_ExecuteStatement,
    ScriptControl_Run
};

static HRESULT WINAPI ScriptControl_CreateInstance(IClassFactory *iface, IUnknown *outer, REFIID riid, void **ppv)
{
    ScriptControl *script_control;
    HRESULT hres;

    TRACE("(%p %s %p)\n", outer, debugstr_guid(riid), ppv);

    script_control = heap_alloc(sizeof(*script_control));
    if(!script_control)
        return E_OUTOFMEMORY;

    script_control->IScriptControl_iface.lpVtbl = &ScriptControlVtbl;
    script_control->ref = 1;

    hres = IScriptControl_QueryInterface(&script_control->IScriptControl_iface, riid, ppv);
    IScriptControl_Release(&script_control->IScriptControl_iface);
    return hres;
}

/******************************************************************
 *              DllMain (msscript.ocx.@)
 */
BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, void *reserved)
{
    TRACE("(%p %d %p)\n", instance, reason, reserved);

    switch(reason) {
    case DLL_WINE_PREATTACH:
        return FALSE;  /* prefer native version */
    case DLL_PROCESS_ATTACH:
        msscript_instance = instance;
        DisableThreadLibraryCalls(instance);
        break;
    case DLL_PROCESS_DETACH:
        if(!reserved)
            release_typelib();
        break;
    }

    return TRUE;
}

static HRESULT WINAPI ClassFactory_QueryInterface(IClassFactory *iface, REFIID riid, void **ppv)
{
    *ppv = NULL;

    if(IsEqualGUID(&IID_IUnknown, riid)) {
        TRACE("(%p)->(IID_IUnknown %p)\n", iface, ppv);
        *ppv = iface;
    }else if(IsEqualGUID(&IID_IClassFactory, riid)) {
        TRACE("(%p)->(IID_IClassFactory %p)\n", iface, ppv);
        *ppv = iface;
    }

    if(*ppv) {
        IUnknown_AddRef((IUnknown*)*ppv);
        return S_OK;
    }

    WARN("(%p)->(%s %p)\n", iface, debugstr_guid(riid), ppv);
    return E_NOINTERFACE;
}

static ULONG WINAPI ClassFactory_AddRef(IClassFactory *iface)
{
    TRACE("(%p)\n", iface);
    return 2;
}

static ULONG WINAPI ClassFactory_Release(IClassFactory *iface)
{
    TRACE("(%p)\n", iface);
    return 1;
}

static HRESULT WINAPI ClassFactory_LockServer(IClassFactory *iface, BOOL fLock)
{
    TRACE("(%p)->(%x)\n", iface, fLock);
    return S_OK;
}

static const IClassFactoryVtbl ScriptControlFactoryVtbl = {
    ClassFactory_QueryInterface,
    ClassFactory_AddRef,
    ClassFactory_Release,
    ScriptControl_CreateInstance,
    ClassFactory_LockServer
};

static IClassFactory ScriptControlFactory = { &ScriptControlFactoryVtbl };

/***********************************************************************
 *		DllGetClassObject	(msscript.ocx.@)
 */
HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv)
{
    if(IsEqualGUID(&CLSID_ScriptControl, rclsid)) {
        TRACE("(CLSID_ScriptControl %s %p)\n", debugstr_guid(riid), ppv);
        return IClassFactory_QueryInterface(&ScriptControlFactory, riid, ppv);
    }

    FIXME("%s %s %p\n", debugstr_guid(rclsid), debugstr_guid(riid), ppv);
    return CLASS_E_CLASSNOTAVAILABLE;
}

/***********************************************************************
 *          DllCanUnloadNow (msscript.ocx.@)
 */
HRESULT WINAPI DllCanUnloadNow(void)
{
    TRACE("\n");
    return S_FALSE;
}

/***********************************************************************
 *          DllRegisterServer (msscript.ocx.@)
 */
HRESULT WINAPI DllRegisterServer(void)
{
    TRACE("()\n");
    return __wine_register_resources(msscript_instance);
}

/***********************************************************************
 *          DllUnregisterServer (msscript.ocx.@)
 */
HRESULT WINAPI DllUnregisterServer(void)
{
    TRACE("()\n");
    return __wine_unregister_resources(msscript_instance);
}