/*****************************************************************************
 * vlccontrol.cpp: ActiveX control for VLC
 *****************************************************************************
 * Copyright (C) 2005 VideoLAN
 *
 * Authors: Damien Fouilleul <Damien.Fouilleul@laposte.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

#include "plugin.h"
#include "vlccontrol.h"

#include "utils.h"

VLCControl::~VLCControl()
{
    if( _p_typeinfo )
        _p_typeinfo->Release();
};

HRESULT VLCControl::getTypeInfo(void)
{
    HRESULT hr = NOERROR;
    if( NULL == _p_typeinfo )
    {
        ITypeLib *p_typelib;

        HRESULT hr = _p_instance->getTypeLib(&p_typelib);
        if( SUCCEEDED(hr) )
        {
            hr = p_typelib->GetTypeInfoOfGuid(IID_IVLCControl, &_p_typeinfo);
            if( FAILED(hr) )
            {
                _p_typeinfo = NULL;
            }
            p_typelib->Release();
        }
    }
    return hr;
};

STDMETHODIMP VLCControl::GetTypeInfoCount(UINT* pctInfo)
{
    if( SUCCEEDED(getTypeInfo()) )
        *pctInfo = 1;
    else
        *pctInfo = 0;

    return NOERROR;
};

STDMETHODIMP VLCControl::GetTypeInfo(UINT iTInfo, LCID lcid, LPTYPEINFO* ppTInfo)
{
    if( NULL == ppTInfo )
        return E_INVALIDARG;

    if( SUCCEEDED(getTypeInfo()) )
    {
        _p_typeinfo->AddRef();
        *ppTInfo = _p_typeinfo;
        return NO_ERROR;
    }
    *ppTInfo = NULL;
    return E_NOTIMPL;
};

STDMETHODIMP VLCControl::GetIDsOfNames(REFIID riid, LPOLESTR* rgszNames, 
        UINT cNames, LCID lcid, DISPID* rgDispID)
{
    if( SUCCEEDED(getTypeInfo()) )
    {
        return DispGetIDsOfNames(_p_typeinfo, rgszNames, cNames, rgDispID);
    }
    return E_NOTIMPL;
};

STDMETHODIMP VLCControl::Invoke(DISPID dispIdMember, REFIID riid,
        LCID lcid, WORD wFlags, DISPPARAMS* pDispParams,
        VARIANT* pVarResult, EXCEPINFO* pExcepInfo, UINT* puArgErr)
{
    if( SUCCEEDED(getTypeInfo()) )
    {
        return DispInvoke(this, _p_typeinfo, dispIdMember, wFlags, pDispParams,
                pVarResult, pExcepInfo, puArgErr);
    }
    return E_NOTIMPL;
};

STDMETHODIMP VLCControl::get_Value(VARIANT *pvarValue)
{
    if( NULL == pvarValue )
        return E_INVALIDARG;

    V_VT(pvarValue) = VT_BOOL;
    return get_Playing(&V_BOOL(pvarValue));
};
        
STDMETHODIMP VLCControl::put_Value(VARIANT pvarValue)
{
    if( VT_BOOL != V_VT(&pvarValue) )
    {
        VARIANT boolValue;
        HRESULT hr = VariantChangeType(&boolValue, &pvarValue, 0, VT_BOOL);
        if( SUCCEEDED(hr) )
        {
            hr = get_Playing(&V_BOOL(&pvarValue));
            //VariantClear(&boolValue);
        }
        return hr;
    }
    return get_Playing(&V_BOOL(&pvarValue));
};
        
STDMETHODIMP VLCControl::get_Visible(VARIANT_BOOL *isVisible)
{
    if( NULL == isVisible )
        return E_INVALIDARG;

    if( _p_instance->isInPlaceActive() )
        *isVisible = _p_instance->isVisible() ? VARIANT_TRUE : VARIANT_FALSE;
    else
        *isVisible = VARIANT_FALSE;

    return NOERROR;
};
        
STDMETHODIMP VLCControl::put_Visible(VARIANT_BOOL isVisible)
{
    if( _p_instance->isInPlaceActive() )
        _p_instance->setVisible(isVisible != VARIANT_FALSE);
    else
        _p_instance->setShowDisplay(isVisible != VARIANT_FALSE);

    return NOERROR;
};

STDMETHODIMP VLCControl::play(void)
{
    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        VLC_Play(i_vlc);
        _p_instance->fireOnPlayEvent();
        return NOERROR;
    }
    return E_UNEXPECTED;
};
 
STDMETHODIMP VLCControl::pause(void)
{
    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        VLC_Pause(i_vlc);
        _p_instance->fireOnPauseEvent();
        return NOERROR;
    }
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::stop(void)
{
    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        VLC_Stop(i_vlc);
        _p_instance->fireOnStopEvent();
        return NOERROR;
    }
    return E_UNEXPECTED;
}
        
STDMETHODIMP VLCControl::get_Playing(VARIANT_BOOL *isPlaying)
{
    if( NULL == isPlaying )
        return E_INVALIDARG;

    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        *isPlaying = VLC_IsPlaying(i_vlc) ? VARIANT_TRUE : VARIANT_FALSE;
        return NOERROR;
    }
    *isPlaying = VARIANT_FALSE;
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::put_Playing(VARIANT_BOOL isPlaying)
{
    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        if( VARIANT_FALSE == isPlaying )
        {
            if( VLC_IsPlaying(i_vlc) )
                VLC_Stop(i_vlc);
        }
        else
        {
            if( ! VLC_IsPlaying(i_vlc) )
                VLC_Play(i_vlc);
        }
        return NOERROR;
    }
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::get_Position(float *position)
{
    if( NULL == position )
        return E_INVALIDARG;

    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        *position = VLC_PositionGet(i_vlc);
        return NOERROR;
    }
    *position = 0.0f;
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::put_Position(float position)
{
    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        VLC_PositionSet(i_vlc, position);
        return NOERROR;
    }
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::get_Time(int *seconds)
{
    if( NULL == seconds )
        return E_INVALIDARG;

    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        *seconds = VLC_TimeGet(i_vlc);
        return NOERROR;
    }
    *seconds = 0;
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::put_Time(int seconds)
{
    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        VLC_TimeSet(i_vlc, seconds, VLC_FALSE);
        return NOERROR;
    }
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::shuttle(int seconds)
{
    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        VLC_TimeSet(i_vlc, seconds, VLC_TRUE);
        return NOERROR;
    }
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::fullscreen(void)
{
    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        VLC_FullScreen(i_vlc);
        return NOERROR;
    }
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::get_Length(int *seconds)
{
    if( NULL == seconds )
        return E_INVALIDARG;

    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        *seconds = VLC_LengthGet(i_vlc);
        return NOERROR;
    }
    *seconds = 0;
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::playFaster(void)
{
    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        VLC_SpeedFaster(i_vlc);
        return NOERROR;
    }
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::playSlower(void)
{
    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        VLC_SpeedSlower(i_vlc);
        return NOERROR;
    }
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::get_Volume(int *volume)
{
    if( NULL == volume )
        return E_INVALIDARG;

    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        *volume  = VLC_VolumeGet(i_vlc);
        return NOERROR;
    }
    *volume = 0;
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::put_Volume(int volume)
{
    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        VLC_VolumeSet(i_vlc, volume);
        return NOERROR;
    }
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::toggleMute(void)
{
    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        VLC_VolumeMute(i_vlc);
        return NOERROR;
    }
    return E_UNEXPECTED;
};

static void freeTargetOptions(char **cOptions, int cOptionCount)
{
    // clean up 
    for( long pos=0; pos<cOptionCount; ++pos )
    {
        char *cOption = cOptions[pos];
        if( NULL != cOption )
            free(cOption);
        else
            break;
    }
    if( NULL != cOptions )
        free(cOptions);
};

static HRESULT createTargetOptions(int codePage, VARIANT *options, char ***cOptions, int *cOptionCount)
{
    HRESULT hr = E_INVALIDARG;
    if( VT_ERROR == V_VT(options) )
    {
        if( DISP_E_PARAMNOTFOUND == V_ERROR(options) )
        {
            // optional parameter not set
            *cOptions = NULL;
            *cOptionCount = 0;
            return NOERROR;
        }
    }
    else if( (VT_EMPTY == V_VT(options)) || (VT_NULL == V_VT(options)) )
    {
        // null parameter
        *cOptions = NULL;
        *cOptionCount = 0;
        return NOERROR;
    }
    else if( VT_DISPATCH == V_VT(options) )
    {
        // collection parameter
        VARIANT colEnum;
        V_VT(&colEnum) = VT_UNKNOWN;
        hr = GetObjectProperty(V_DISPATCH(options), DISPID_NEWENUM, colEnum);
        if( SUCCEEDED(hr) )
        {
            IEnumVARIANT *enumVar;
            hr = V_UNKNOWN(&colEnum)->QueryInterface(IID_IEnumVARIANT, (LPVOID *)&enumVar);
            if( SUCCEEDED(hr) )
            {
                long pos = 0;
                long capacity = 16;
                VARIANT option;

                *cOptions = (char **)malloc(capacity*sizeof(char *));
                if( NULL != *cOptions )
                {
                    ZeroMemory(*cOptions, sizeof(char *)*capacity);
                    while( SUCCEEDED(hr) && (S_OK == enumVar->Next(1, &option, NULL)) )
                    {
                        if( VT_BSTR == V_VT(&option) )
                        {
                            char *cOption = CStrFromBSTR(codePage, V_BSTR(&option));
                            (*cOptions)[pos] = cOption;
                            if( NULL != cOption )
                            {
                                ++pos;
                                if( pos == capacity )
                                {
                                    char **moreOptions = (char **)realloc(*cOptions, (capacity+16)*sizeof(char *));
                                    if( NULL != moreOptions )
                                    {
                                        ZeroMemory(moreOptions+capacity, sizeof(char *)*16);
                                        capacity += 16;
                                        *cOptions = moreOptions;
                                    }
                                    else
                                        hr = E_OUTOFMEMORY;
                                }
                            }
                            else
                                hr = E_OUTOFMEMORY;
                        }
                        else
                            hr = E_INVALIDARG;

                        VariantClear(&option);
                    }
                    *cOptionCount = pos;
                    if( FAILED(hr) )
                    {
                        // free already processed elements
                        freeTargetOptions(*cOptions, *cOptionCount);
                    }
                }
                else
                    hr = E_OUTOFMEMORY;
                enumVar->Release();
            }
        }
    }
    else if( V_ISARRAY(options) )
    {
        // array parameter
        SAFEARRAY *array = V_ISBYREF(options) ? *V_ARRAYREF(options) : V_ARRAY(options);

        if( SafeArrayGetDim(array) != 1 )
            return E_INVALIDARG;

        long lBound = 0;
        long uBound = 0;
        SafeArrayGetLBound(array, 1, &lBound);
        SafeArrayGetUBound(array, 1, &uBound);

        // have we got any options
        if( uBound > lBound )
        {
            VARTYPE vType;
            HRESULT hr = SafeArrayGetVartype(array, &vType);
            if( FAILED(hr) )
                return hr;

            long pos;

            // marshall options into an array of C strings
            if( VT_VARIANT == vType )
            {
                *cOptions = (char **)malloc(sizeof(char *)*(uBound-lBound));
                if( NULL != options )
                    return E_OUTOFMEMORY;

                for(pos=lBound; SUCCEEDED(hr) && (pos<uBound); ++pos )
                {
                    VARIANT option;
                    hr = SafeArrayGetElement(array, &pos, &option);
                    if( SUCCEEDED(hr) )
                    {
                        if( VT_BSTR == V_VT(&option) ) 
                        {
                            char *cOption = CStrFromBSTR(codePage, V_BSTR(&option));
                            (*cOptions)[pos-lBound] = cOption;
                            if( NULL == cOption )
                                hr = E_OUTOFMEMORY;
                        }
                        else
                            hr = E_INVALIDARG;
                        VariantClear(&option);
                    }
                }
            }
            else if( VT_BSTR == vType )
            {
                *cOptions = (char **)malloc(sizeof(char *)*(uBound-lBound));
                if( NULL != options )
                    return E_OUTOFMEMORY;

                ZeroMemory(cOptions, sizeof(char *)*(uBound-lBound));
                for(pos=lBound; SUCCEEDED(hr) && (pos<uBound); ++pos )
                {
                    BSTR option;
                    hr = SafeArrayGetElement(array, &pos, &option);
                    if( SUCCEEDED(hr) )
                    {
                        char *cOption = CStrFromBSTR(codePage, option);
                        (*cOptions)[pos-lBound] = cOption;
                        if( NULL == cOption )
                            hr = E_OUTOFMEMORY;
                        SysFreeString(option);
                    }
                }
            }
            else
                // unsupported type
                return E_INVALIDARG;

            *cOptionCount = pos-lBound;
            if( FAILED(hr) )
            {
                // free already processed elements
                freeTargetOptions(*cOptions, *cOptionCount);
            }
        }
        else
        {
            // empty array
            *cOptions = NULL;
            *cOptionCount = 0;
            return NOERROR;
        }
    }
    return hr;
};

/*
** use VARIANT rather than a SAFEARRAY as argument type
** for compatibility with some scripting language (JScript)
*/

STDMETHODIMP VLCControl::addTarget( BSTR uri, VARIANT options, enum VLCPlaylistMode mode, int position)
{
    if( NULL == uri )
        return E_INVALIDARG;

    HRESULT hr = E_UNEXPECTED;

    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        int codePage = _p_instance->getCodePage();
        char *cUri = CStrFromBSTR(codePage, uri);
        if( NULL == cUri )
            return E_OUTOFMEMORY;

        int cOptionsCount;
        char **cOptions;

        if( FAILED(createTargetOptions(codePage, &options, &cOptions, &cOptionsCount)) )
            return E_INVALIDARG;

        VLC_AddTarget(i_vlc, cUri, (const char **)cOptions, cOptionsCount, mode, position);
        hr = NOERROR;

        freeTargetOptions(cOptions, cOptionsCount);
        free(cUri);
    }
    return hr;
};
        
STDMETHODIMP VLCControl::get_PlaylistIndex(int *index)
{
    if( NULL == index )
        return E_INVALIDARG;

    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        *index = VLC_PlaylistIndex(i_vlc);
        return NOERROR;
    }
    *index = 0;
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::get_PlaylistCount(int *count)
{
    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        *count = VLC_PlaylistNumberOfItems(i_vlc);
        return NOERROR;
    }
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::playlistNext(void)
{
    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        VLC_PlaylistNext(i_vlc);
        return NOERROR;
    }
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::playlistPrev(void)
{
    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        VLC_PlaylistPrev(i_vlc);
        return NOERROR;
    }
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::playlistClear(void)
{
    int i_vlc = _p_instance->getVLCObject();
    if( i_vlc )
    {
        VLC_PlaylistClear(i_vlc);
        return NOERROR;
    }
    return E_UNEXPECTED;
};
        
STDMETHODIMP VLCControl::get_VersionInfo(BSTR *version)
{
    if( NULL == version )
        return E_INVALIDARG;

    const char *versionStr = VLC_Version();
    if( NULL != versionStr )
    {
        *version = BSTRFromCStr(_p_instance->getCodePage(), versionStr);
        
        return NULL == *version ? E_OUTOFMEMORY : NOERROR;
    }
    *version = NULL;
    return E_FAIL;
};
 
