/*
 *    SAX Reader implementation
 *
 * Copyright 2008 Alistair Leslie-Hughes
 *
 * 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 "config.h"

#include <stdarg.h>
#include <assert.h>
#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "winnls.h"
#include "ole2.h"
#include "msxml2.h"
#include "wininet.h"
#include "urlmon.h"
#include "winreg.h"
#include "shlwapi.h"

#include "wine/debug.h"

#include "msxml_private.h"

WINE_DEFAULT_DEBUG_CHANNEL(msxml);

#ifdef HAVE_LIBXML2

#include <libxml/SAX2.h>

typedef struct _saxreader
{
    const struct IVBSAXXMLReaderVtbl *lpVtbl;
    LONG ref;
    xmlSAXHandler sax;
} saxreader;

static inline saxreader *impl_from_IVBSAXXMLReader( IVBSAXXMLReader *iface )
{
    return (saxreader *)((char*)iface - FIELD_OFFSET(saxreader, lpVtbl));
};

/*** IUnknown methods ***/
static HRESULT WINAPI saxxmlreader_QueryInterface(IVBSAXXMLReader* iface, REFIID riid, void **ppvObject)
{
    saxreader *This = impl_from_IVBSAXXMLReader( iface );

    TRACE("%p %s %p\n", This, debugstr_guid( riid ), ppvObject );

    *ppvObject = NULL;

    if ( IsEqualGUID( riid, &IID_IUnknown ) ||
         IsEqualGUID( riid, &IID_IDispatch ) ||
         IsEqualGUID( riid, &IID_IVBSAXXMLReader ))
    {
        *ppvObject = iface;
    }
    else
    {
        FIXME("interface %s not implemented\n", debugstr_guid(riid));
        return E_NOINTERFACE;
    }

    IVBSAXXMLReader_AddRef( iface );

    return S_OK;
}

static ULONG WINAPI saxxmlreader_AddRef(IVBSAXXMLReader* iface)
{
    saxreader *This = impl_from_IVBSAXXMLReader( iface );
    TRACE("%p\n", This );
    return InterlockedIncrement( &This->ref );
}

static ULONG WINAPI saxxmlreader_Release(
    IVBSAXXMLReader* iface)
{
    saxreader *This = impl_from_IVBSAXXMLReader( iface );
    LONG ref;

    TRACE("%p\n", This );

    ref = InterlockedDecrement( &This->ref );
    if ( ref == 0 )
    {
        HeapFree( GetProcessHeap(), 0, This );
    }

    return ref;
}
/*** IDispatch ***/
static HRESULT WINAPI saxxmlreader_GetTypeInfoCount( IVBSAXXMLReader *iface, UINT* pctinfo )
{
    saxreader *This = impl_from_IVBSAXXMLReader( iface );

    TRACE("(%p)->(%p)\n", This, pctinfo);

    *pctinfo = 1;

    return S_OK;
}

static HRESULT WINAPI saxxmlreader_GetTypeInfo(
    IVBSAXXMLReader *iface,
    UINT iTInfo, LCID lcid, ITypeInfo** ppTInfo )
{
    saxreader *This = impl_from_IVBSAXXMLReader( iface );
    HRESULT hr;

    TRACE("(%p)->(%u %u %p)\n", This, iTInfo, lcid, ppTInfo);

    hr = get_typeinfo(IVBSAXXMLReader_tid, ppTInfo);

    return hr;
}

static HRESULT WINAPI saxxmlreader_GetIDsOfNames(
    IVBSAXXMLReader *iface,
    REFIID riid,
    LPOLESTR* rgszNames,
    UINT cNames,
    LCID lcid,
    DISPID* rgDispId)
{
    saxreader *This = impl_from_IVBSAXXMLReader( iface );
    ITypeInfo *typeinfo;
    HRESULT hr;

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

    if(!rgszNames || cNames == 0 || !rgDispId)
        return E_INVALIDARG;

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

    return hr;
}

static HRESULT WINAPI saxxmlreader_Invoke(
    IVBSAXXMLReader *iface,
    DISPID dispIdMember,
    REFIID riid,
    LCID lcid,
    WORD wFlags,
    DISPPARAMS* pDispParams,
    VARIANT* pVarResult,
    EXCEPINFO* pExcepInfo,
    UINT* puArgErr)
{
    saxreader *This = impl_from_IVBSAXXMLReader( iface );
    ITypeInfo *typeinfo;
    HRESULT hr;

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

    hr = get_typeinfo(IVBSAXXMLReader_tid, &typeinfo);
    if(SUCCEEDED(hr))
    {
        hr = ITypeInfo_Invoke(typeinfo, &(This->lpVtbl), dispIdMember, wFlags, pDispParams,
                pVarResult, pExcepInfo, puArgErr);
        ITypeInfo_Release(typeinfo);
    }

    return hr;
}

/*** IVBSAXXMLReader methods ***/
static HRESULT WINAPI saxxmlreader_getFeature(
    IVBSAXXMLReader* iface,
    const WCHAR *pFeature,
    VARIANT_BOOL *pValue)
{
    return E_NOTIMPL;
}

static HRESULT WINAPI saxxmlreader_putFeature(
    IVBSAXXMLReader* iface,
    const WCHAR *pFeature,
    VARIANT_BOOL vfValue)
{
    return E_NOTIMPL;
}

static HRESULT WINAPI saxxmlreader_getProperty(
    IVBSAXXMLReader* iface,
    const WCHAR *pProp,
    VARIANT *pValue)
{
    return E_NOTIMPL;
}

static HRESULT WINAPI saxxmlreader_putProperty(
    IVBSAXXMLReader* iface,
    const WCHAR *pProp,
    VARIANT value)
{
    return E_NOTIMPL;
}

static HRESULT WINAPI saxxmlreader_getEntityResolver(
    IVBSAXXMLReader* iface,
    IVBSAXEntityResolver **pEntityResolver)
{
    return E_NOTIMPL;
}

static HRESULT WINAPI saxxmlreader_putEntityResolver(
    IVBSAXXMLReader* iface,
    IVBSAXEntityResolver *pEntityResolver)
{
    return E_NOTIMPL;
}

static HRESULT WINAPI saxxmlreader_getContentHandler(
    IVBSAXXMLReader* iface,
    IVBSAXContentHandler **ppContentHandler)
{
    return E_NOTIMPL;
}

static HRESULT WINAPI saxxmlreader_putContentHandler(
    IVBSAXXMLReader* iface,
    IVBSAXContentHandler *contentHandler)
{
    return E_NOTIMPL;
}

static HRESULT WINAPI saxxmlreader_getDTDHandler(
    IVBSAXXMLReader* iface,
    IVBSAXDTDHandler **pDTDHandler)
{
    return E_NOTIMPL;
}

static HRESULT WINAPI saxxmlreader_putDTDHandler(
    IVBSAXXMLReader* iface,
    IVBSAXDTDHandler *pDTDHandler)
{
    return E_NOTIMPL;
}

static HRESULT WINAPI saxxmlreader_getErrorHandler(
    IVBSAXXMLReader* iface,
    IVBSAXErrorHandler **pErrorHandler)
{
    return E_NOTIMPL;
}

static HRESULT WINAPI saxxmlreader_putErrorHandler(
    IVBSAXXMLReader* iface,
    IVBSAXErrorHandler *errorHandler)
{
    return E_NOTIMPL;
}

static HRESULT WINAPI saxxmlreader_getBaseURL(
    IVBSAXXMLReader* iface,
    const WCHAR **pBaseUrl)
{
    return E_NOTIMPL;
}

static HRESULT WINAPI saxxmlreader_putBaseURL(
    IVBSAXXMLReader* iface,
    const WCHAR *pBaseUrl)
{
    return E_NOTIMPL;
}

static HRESULT WINAPI saxxmlreader_getSecureBaseURL(
    IVBSAXXMLReader* iface,
    const WCHAR **pSecureBaseUrl)
{
    return E_NOTIMPL;
}


static HRESULT WINAPI saxxmlreader_putSecureBaseURL(
    IVBSAXXMLReader* iface,
    const WCHAR *secureBaseUrl)
{
    return E_NOTIMPL;
}

static HRESULT WINAPI saxxmlreader_parse(
    IVBSAXXMLReader* iface,
    VARIANT varInput)
{
    return E_NOTIMPL;
}

static HRESULT WINAPI saxxmlreader_parseURL(
    IVBSAXXMLReader* iface,
    const WCHAR *url)
{
    return E_NOTIMPL;
}

static const struct IVBSAXXMLReaderVtbl saxreader_vtbl =
{
    saxxmlreader_QueryInterface,
    saxxmlreader_AddRef,
    saxxmlreader_Release,
    saxxmlreader_GetTypeInfoCount,
    saxxmlreader_GetTypeInfo,
    saxxmlreader_GetIDsOfNames,
    saxxmlreader_Invoke,
    saxxmlreader_getFeature,
    saxxmlreader_putFeature,
    saxxmlreader_getProperty,
    saxxmlreader_putProperty,
    saxxmlreader_getEntityResolver,
    saxxmlreader_putEntityResolver,
    saxxmlreader_getContentHandler,
    saxxmlreader_putContentHandler,
    saxxmlreader_getDTDHandler,
    saxxmlreader_putDTDHandler,
    saxxmlreader_getErrorHandler,
    saxxmlreader_putErrorHandler,
    saxxmlreader_getBaseURL,
    saxxmlreader_putBaseURL,
    saxxmlreader_getSecureBaseURL,
    saxxmlreader_putSecureBaseURL,
    saxxmlreader_parse,
    saxxmlreader_parseURL
};

HRESULT SAXXMLReader_create(IUnknown *pUnkOuter, LPVOID *ppObj)
{
    saxreader *reader;

    TRACE("(%p,%p)\n", pUnkOuter, ppObj);

    reader = HeapAlloc( GetProcessHeap(), 0, sizeof (*reader) );
    if( !reader )
        return E_OUTOFMEMORY;

    reader->lpVtbl = &saxreader_vtbl;
    reader->ref = 1;

    *ppObj = &reader->lpVtbl;

    TRACE("returning iface %p\n", *ppObj);

    return S_OK;
}

#else

HRESULT SAXXMLReader_create(IUnknown *pUnkOuter, LPVOID *ppObj)
{
    MESSAGE("This program tried to use a SAX XML Reader object, but\n"
            "libxml2 support was not present at compile time.\n");
    return E_NOTIMPL;
}

#endif