/*
 * Implementation of the Microsoft Installer (msi.dll)
 *
 * Copyright 2002,2003,2004,2005 Mike McCormack 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
 */

#include <stdarg.h>

#define COBJMACROS
#define NONAMELESSUNION

#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "winnls.h"
#include "wine/debug.h"
#include "msi.h"
#include "msiquery.h"
#include "msipriv.h"
#include "objidl.h"
#include "objbase.h"

#include "initguid.h"

WINE_DEFAULT_DEBUG_CHANNEL(msi);

DEFINE_GUID( CLSID_MsiDatabase, 0x000c1084, 0x0000, 0x0000,
             0xc0,0x00,0x00,0x00,0x00,0x00,0x00,0x46);
DEFINE_GUID( CLSID_MsiPatch, 0x000c1086, 0x0000, 0x0000,
             0xc0,0x00,0x00,0x00,0x00,0x00,0x00,0x46);

/*
 *  .MSI  file format
 *
 *  An .msi file is a structured storage file.
 *  It contains a number of streams.
 *  A stream for each table in the database.
 *  Two streams for the string table in the database.
 *  Any binary data in a table is a reference to a stream.
 */

static VOID MSI_CloseDatabase( MSIOBJECTHDR *arg )
{
    MSIDATABASE *db = (MSIDATABASE *) arg;
    DWORD r;

    free_cached_tables( db );
    msi_free_transforms( db );
    msi_destroy_stringtable( db->strings );
    r = IStorage_Release( db->storage );
    if( r )
        ERR("database reference count was not zero (%ld)\n", r);
}

UINT MSI_OpenDatabaseW(LPCWSTR szDBPath, LPCWSTR szPersist, MSIDATABASE **pdb)
{
    IStorage *stg = NULL;
    HRESULT r;
    MSIDATABASE *db = NULL;
    UINT ret = ERROR_FUNCTION_FAILED;
    LPCWSTR szMode;
    STATSTG stat;

    TRACE("%s %s\n",debugstr_w(szDBPath),debugstr_w(szPersist) );

    if( !pdb )
        return ERROR_INVALID_PARAMETER;

    szMode = szPersist;
    if( HIWORD( szPersist ) )
    {
        /* UINT len = lstrlenW( szPerist ) + 1; */
        FIXME("don't support persist files yet\b");
        return ERROR_INVALID_PARAMETER;
        /* szMode = msi_alloc( len * sizeof (DWORD) ); */
    }
    else if( szPersist == MSIDBOPEN_READONLY )
    {
        r = StgOpenStorage( szDBPath, NULL,
              STGM_DIRECT|STGM_READ|STGM_SHARE_DENY_WRITE, NULL, 0, &stg);
    }
    else if( szPersist == MSIDBOPEN_CREATE )
    {
        r = StgCreateDocfile( szDBPath, 
              STGM_DIRECT|STGM_READWRITE|STGM_SHARE_EXCLUSIVE, 0, &stg);
        if( r == ERROR_SUCCESS )
        {
            IStorage_SetClass( stg, &CLSID_MsiDatabase );
            r = init_string_table( stg );
        }
    }
    else if( szPersist == MSIDBOPEN_TRANSACT )
    {
        r = StgOpenStorage( szDBPath, NULL,
              STGM_DIRECT|STGM_READWRITE|STGM_SHARE_EXCLUSIVE, NULL, 0, &stg);
    }
    else
    {
        ERR("unknown flag %p\n",szPersist);
        return ERROR_INVALID_PARAMETER;
    }

    if( FAILED( r ) )
    {
        FIXME("open failed r = %08lx!\n",r);
        return ERROR_FUNCTION_FAILED;
    }

    r = IStorage_Stat( stg, &stat, STATFLAG_NONAME );
    if( FAILED( r ) )
    {
        FIXME("Failed to stat storage\n");
        goto end;
    }

    if ( !IsEqualGUID( &stat.clsid, &CLSID_MsiDatabase ) &&
         !IsEqualGUID( &stat.clsid, &CLSID_MsiPatch ) ) 
    {
        ERR("storage GUID is not a MSI database GUID %s\n",
             debugstr_guid(&stat.clsid) );
        goto end;
    }

    db = alloc_msiobject( MSIHANDLETYPE_DATABASE, sizeof (MSIDATABASE),
                              MSI_CloseDatabase );
    if( !db )
    {
        FIXME("Failed to allocate a handle\n");
        goto end;
    }

    if( TRACE_ON( msi ) )
        enum_stream_names( stg );

    db->storage = stg;
    db->mode = szMode;
    list_init( &db->tables );
    list_init( &db->transforms );

    db->strings = load_string_table( stg );
    if( !db->strings )
        goto end;

    ret = ERROR_SUCCESS;

    msiobj_addref( &db->hdr );
    IStorage_AddRef( stg );
    *pdb = db;

end:
    if( db )
        msiobj_release( &db->hdr );
    if( stg )
        IStorage_Release( stg );

    return ret;
}

UINT WINAPI MsiOpenDatabaseW(LPCWSTR szDBPath, LPCWSTR szPersist, MSIHANDLE *phDB)
{
    MSIDATABASE *db;
    UINT ret;

    TRACE("%s %s %p\n",debugstr_w(szDBPath),debugstr_w(szPersist), phDB);

    ret = MSI_OpenDatabaseW( szDBPath, szPersist, &db );
    if( ret == ERROR_SUCCESS )
    {
        *phDB = alloc_msihandle( &db->hdr );
        msiobj_release( &db->hdr );
    }

    return ret;
}

UINT WINAPI MsiOpenDatabaseA(LPCSTR szDBPath, LPCSTR szPersist, MSIHANDLE *phDB)
{
    HRESULT r = ERROR_FUNCTION_FAILED;
    LPWSTR szwDBPath = NULL, szwPersist = NULL;

    TRACE("%s %s %p\n", debugstr_a(szDBPath), debugstr_a(szPersist), phDB);

    if( szDBPath )
    {
        szwDBPath = strdupAtoW( szDBPath );
        if( !szwDBPath )
            goto end;
    }

    if( HIWORD(szPersist) )
    {
        szwPersist = strdupAtoW( szPersist );
        if( !szwPersist )
            goto end;
    }
    else
        szwPersist = (LPWSTR)(DWORD_PTR)szPersist;

    r = MsiOpenDatabaseW( szwDBPath, szwPersist, phDB );

end:
    if( HIWORD(szPersist) )
        msi_free( szwPersist );
    msi_free( szwDBPath );

    return r;
}

UINT MSI_DatabaseImport( MSIDATABASE *db, LPCWSTR folder, LPCWSTR file )
{
    FIXME("%p %s %s\n", db, debugstr_w(folder), debugstr_w(file) );

    if( folder == NULL || file == NULL )
        return ERROR_INVALID_PARAMETER;
   
    return ERROR_CALL_NOT_IMPLEMENTED;
}

UINT WINAPI MsiDatabaseImportW(MSIHANDLE handle, LPCWSTR szFolder, LPCWSTR szFilename)
{
    MSIDATABASE *db;
    UINT r;

    TRACE("%lx %s %s\n",handle,debugstr_w(szFolder), debugstr_w(szFilename));

    db = msihandle2msiinfo( handle, MSIHANDLETYPE_DATABASE );
    if( !db )
        return ERROR_INVALID_HANDLE;
    r = MSI_DatabaseImport( db, szFolder, szFilename );
    msiobj_release( &db->hdr );
    return r;
}

UINT WINAPI MsiDatabaseImportA( MSIHANDLE handle,
               LPCSTR szFolder, LPCSTR szFilename )
{
    LPWSTR path = NULL, file = NULL;
    UINT r = ERROR_OUTOFMEMORY;

    TRACE("%lx %s %s\n", handle, debugstr_a(szFolder), debugstr_a(szFilename));

    if( szFolder )
    {
        path = strdupAtoW( szFolder );
        if( !path )
            goto end;
    }

    if( szFilename )
    {
        file = strdupAtoW( szFilename );
        if( !file )
            goto end;
    }

    r = MsiDatabaseImportW( handle, path, file );

end:
    msi_free( path );
    msi_free( file );

    return r;
}

UINT MSI_DatabaseExport( MSIDATABASE *db, LPCWSTR table,
               LPCWSTR folder, LPCWSTR file )
{
    FIXME("%p %s %s %s\n", db, debugstr_w(table),
          debugstr_w(folder), debugstr_w(file) );

    if( folder == NULL || file == NULL )
        return ERROR_INVALID_PARAMETER;
   
    return ERROR_CALL_NOT_IMPLEMENTED;
}

UINT WINAPI MsiDatabaseExportW( MSIHANDLE handle, LPCWSTR szTable,
               LPCWSTR szFolder, LPCWSTR szFilename )
{
    MSIDATABASE *db;
    UINT r;

    TRACE("%lx %s %s %s\n", handle, debugstr_w(szTable),
          debugstr_w(szFolder), debugstr_w(szFilename));

    db = msihandle2msiinfo( handle, MSIHANDLETYPE_DATABASE );
    if( !db )
        return ERROR_INVALID_HANDLE;
    r = MSI_DatabaseExport( db, szTable, szFolder, szFilename );
    msiobj_release( &db->hdr );
    return r;
}

UINT WINAPI MsiDatabaseExportA( MSIHANDLE handle, LPCSTR szTable,
               LPCSTR szFolder, LPCSTR szFilename )
{
    LPWSTR path = NULL, file = NULL, table = NULL;
    UINT r = ERROR_OUTOFMEMORY;

    TRACE("%lx %s %s %s\n", handle, debugstr_a(szTable),
          debugstr_a(szFolder), debugstr_a(szFilename));

    if( szTable )
    {
        table = strdupAtoW( szTable );
        if( !table )
            goto end;
    }

    if( szFolder )
    {
        path = strdupAtoW( szFolder );
        if( !path )
            goto end;
    }

    if( szFilename )
    {
        file = strdupAtoW( szFilename );
        if( !file )
            goto end;
    }

    r = MsiDatabaseExportW( handle, table, path, file );

end:
    msi_free( table );
    msi_free( path );
    msi_free( file );

    return r;
}

MSIDBSTATE WINAPI MsiGetDatabaseState( MSIHANDLE handle )
{
    MSIDBSTATE ret = MSIDBSTATE_READ;
    MSIDATABASE *db;

    TRACE("%ld\n", handle);

    db = msihandle2msiinfo( handle, MSIHANDLETYPE_DATABASE );
    if (!db)
        return MSIDBSTATE_ERROR;
    if (db->mode != MSIDBOPEN_READONLY )
        ret = MSIDBSTATE_WRITE;
    msiobj_release( &db->hdr );

    return ret;
}