/*
 * 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 "wine/unicode.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;

    msi_free(db->path);
    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);
    if (db->deletefile)
    {
        DeleteFileW( db->deletefile );
        msi_free( db->deletefile );
    }
}

UINT MSI_OpenDatabaseW(LPCWSTR szDBPath, LPCWSTR szPersist, MSIDATABASE **pdb)
{
    IStorage *stg = NULL;
    HRESULT r;
    MSIDATABASE *db = NULL;
    UINT ret = ERROR_FUNCTION_FAILED;
    LPCWSTR szMode, save_path;
    STATSTG stat;
    BOOL created = FALSE;
    WCHAR path[MAX_PATH];

    static const WCHAR backslash[] = {'\\',0};

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

    if( !pdb )
        return ERROR_INVALID_PARAMETER;

    save_path = szDBPath;
    szMode = szPersist;
    if( HIWORD( szPersist ) )
    {
        if (!CopyFileW( szDBPath, szPersist, FALSE ))
            return ERROR_OPEN_FAILED;

        szDBPath = szPersist;
        szPersist = MSIDBOPEN_TRANSACT;
        created = TRUE;
    }

    if( szPersist == MSIDBOPEN_READONLY )
    {
        r = StgOpenStorage( szDBPath, NULL,
              STGM_DIRECT|STGM_READ|STGM_SHARE_DENY_WRITE, NULL, 0, &stg);
    }
    else if( szPersist == MSIDBOPEN_CREATE || szPersist == MSIDBOPEN_CREATEDIRECT )
    {
        /* FIXME: MSIDBOPEN_CREATE should case STGM_TRANSACTED flag to be
         * used here: */
        r = StgCreateDocfile( szDBPath,
              STGM_CREATE|STGM_DIRECT|STGM_READWRITE|STGM_SHARE_EXCLUSIVE, 0, &stg);
        if( r == ERROR_SUCCESS )
        {
            IStorage_SetClass( stg, &CLSID_MsiDatabase );
            r = init_string_table( stg );
        }
        created = TRUE;
    }
    else if( szPersist == MSIDBOPEN_TRANSACT )
    {
        /* FIXME: MSIDBOPEN_TRANSACT should case STGM_TRANSACTED flag to be
         * used here: */
        r = StgOpenStorage( szDBPath, NULL,
              STGM_DIRECT|STGM_READWRITE|STGM_SHARE_EXCLUSIVE, NULL, 0, &stg);
    }
    else if( szPersist == MSIDBOPEN_DIRECT )
    {
        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 (!strchrW( save_path, '\\' ))
    {
        GetCurrentDirectoryW( MAX_PATH, path );
        lstrcatW( path, backslash );
        lstrcatW( path, save_path );
    }
    else
        lstrcpyW( path, save_path );

    db->path = strdupW( path );

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

    db->storage = stg;
    db->mode = szMode;
    if (created)
        db->deletefile = strdupW( szDBPath );
    else
        db->deletefile = NULL;
    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 );
        if (! *phDB)
            ret = ERROR_NOT_ENOUGH_MEMORY;
        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;
}

static UINT msi_export_record( HANDLE handle, MSIRECORD *row, UINT start )
{
    UINT i, count, len, r = ERROR_SUCCESS;
    const char *sep;
    char *buffer;
    DWORD sz;

    len = 0x100;
    buffer = msi_alloc( len );
    if ( !buffer )
        return ERROR_OUTOFMEMORY;

    count = MSI_RecordGetFieldCount( row );
    for ( i=start; i<=count; i++ )
    {
        sz = len;
        r = MSI_RecordGetStringA( row, i, buffer, &sz );
        if (r == ERROR_MORE_DATA)
        {
            char *p = msi_realloc( buffer, sz + 1 );
            if (!p)
                break;
            len = sz + 1;
            buffer = p;
        }
        sz = len;
        r = MSI_RecordGetStringA( row, i, buffer, &sz );
        if (r != ERROR_SUCCESS)
            break;

        if (!WriteFile( handle, buffer, sz, &sz, NULL ))
        {
            r = ERROR_FUNCTION_FAILED;
            break;
        }

        sep = (i < count) ? "\t" : "\r\n";
        if (!WriteFile( handle, sep, strlen(sep), &sz, NULL ))
        {
            r = ERROR_FUNCTION_FAILED;
            break;
        }
    }
    msi_free( buffer );
    return r;
}

static UINT msi_export_row( MSIRECORD *row, void *arg )
{
    return msi_export_record( arg, row, 1 );
}

UINT MSI_DatabaseExport( MSIDATABASE *db, LPCWSTR table,
               LPCWSTR folder, LPCWSTR file )
{
    static const WCHAR query[] = {
        's','e','l','e','c','t',' ','*',' ','f','r','o','m',' ','%','s',0 };
    static const WCHAR szbs[] = { '\\', 0 };
    MSIRECORD *rec = NULL;
    MSIQUERY *view = NULL;
    LPWSTR filename;
    HANDLE handle;
    UINT len, r;

    TRACE("%p %s %s %s\n", db, debugstr_w(table),
          debugstr_w(folder), debugstr_w(file) );

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

    len = lstrlenW(folder) + lstrlenW(file) + 2;
    filename = msi_alloc(len * sizeof (WCHAR));
    if (!filename)
        return ERROR_OUTOFMEMORY;

    lstrcpyW( filename, folder );
    lstrcatW( filename, szbs );
    lstrcatW( filename, file );

    handle = CreateFileW( filename, GENERIC_READ | GENERIC_WRITE, 0,
                          NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
    msi_free( filename );
    if (handle == INVALID_HANDLE_VALUE)
        return ERROR_FUNCTION_FAILED;

    r = MSI_OpenQuery( db, &view, query, table );
    if (r == ERROR_SUCCESS)
    {
        /* write out row 1, the column names */
        r = MSI_ViewGetColumnInfo(view, MSICOLINFO_NAMES, &rec);
        if (r == ERROR_SUCCESS)
        {
            msi_export_record( handle, rec, 1 );
            msiobj_release( &rec->hdr );
        }

        /* write out row 2, the column types */
        r = MSI_ViewGetColumnInfo(view, MSICOLINFO_TYPES, &rec);
        if (r == ERROR_SUCCESS)
        {
            msi_export_record( handle, rec, 1 );
            msiobj_release( &rec->hdr );
        }

        /* write out row 3, the table name + keys */
        r = MSI_DatabaseGetPrimaryKeys( db, table, &rec );
        if (r == ERROR_SUCCESS)
        {
            MSI_RecordSetStringW( rec, 0, table );
            msi_export_record( handle, rec, 0 );
            msiobj_release( &rec->hdr );
        }

        /* write out row 4 onwards, the data */
        r = MSI_IterateRecords( view, 0, msi_export_row, handle );
        msiobj_release( &view->hdr );
    }

    CloseHandle( handle );

    return r;
}

/***********************************************************************
 * MsiExportDatabaseW        [MSI.@]
 *
 * Writes a file containing the table data as tab separated ASCII.
 *
 * The format is as follows:
 *
 * row1 : colname1 <tab> colname2 <tab> .... colnameN <cr> <lf>
 * row2 : coltype1 <tab> coltype2 <tab> .... coltypeN <cr> <lf>
 * row3 : tablename <tab> key1 <tab> key2 <tab> ... keyM <cr> <lf>
 *
 * Followed by the data, starting at row 1 with one row per line
 *
 * row4 : data <tab> data <tab> data <tab> ... data <cr> <lf>
 */
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;
}