/*
 * Cppcheck - A tool for static C/C++ code analysis
 * Copyright (C) 2007-2010 Daniel Marjamäki and Cppcheck team.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

#include <sstream>
#include <vector>
#include <cstring>
#include <string>
#include <cctype>
#include <algorithm>

#include "filelister.h"
#include "filelister_win32.h"
#include "path.h"

#if defined(_WIN32)
#include <windows.h>
#ifndef __BORLANDC__
#include <shlwapi.h>
#endif
#endif


#if defined(_WIN32)

// Here is the catch: cppcheck core is Ansi code (using char type).
// When compiling Unicode targets WinAPI automatically uses *W Unicode versions
// of called functions. So we must convert data given to WinAPI functions from
// ANSI to Unicode. Likewise we must convert data we get from WinAPI from
// Unicode to ANSI.

#if defined(UNICODE)

static bool TransformUcs2ToAnsi(LPCWSTR psUcs, LPSTR psAnsi, int nAnsi)
{
    WideCharToMultiByte(CP_ACP, 0, psUcs, -1, psAnsi, nAnsi, NULL, NULL);
    return true;
}

static bool TransformAnsiToUcs2(LPCSTR psAnsi, LPWSTR psUcs, UINT nUcs)
{
    MultiByteToWideChar(CP_ACP, 0, psAnsi, -1, psUcs, nUcs);
    return true;
}

static BOOL MyIsDirectory(std::string path)
{
    WCHAR * unicodeCleanPath = new WCHAR[path.size() + 1];
    TransformAnsiToUcs2(path.c_str(), unicodeCleanPath,
                        (path.size() * sizeof(WCHAR)) + 1);
    // See http://msdn.microsoft.com/en-us/library/bb773621(VS.85).aspx
    BOOL res = PathIsDirectory(unicodeCleanPath);
    delete [] unicodeCleanPath;
    return res;
}

static HANDLE MyFindFirstFile(std::string path, LPWIN32_FIND_DATA findData)
{
    WCHAR * unicodeOss = new wchar_t[path.size() + 1];
    TransformAnsiToUcs2(path.c_str(), unicodeOss, (path.size() + 1) * sizeof(WCHAR));
    HANDLE hFind = FindFirstFile(unicodeOss, findData);
    delete [] unicodeOss;
    return hFind;
}

#else // defined(UNICODE)

static BOOL MyIsDirectory(std::string path)
{
#ifdef __BORLANDC__
    return (GetFileAttributes(path.c_str()) & FILE_ATTRIBUTE_DIRECTORY);
#else
// See http://msdn.microsoft.com/en-us/library/bb773621(VS.85).aspx
return PathIsDirectory(path.c_str());
#endif
}

static HANDLE MyFindFirstFile(std::string path, LPWIN32_FIND_DATA findData)
{
    HANDLE hFind = FindFirstFile(path.c_str(), findData);
    return hFind;
}

#endif // defined(UNICODE)

void FileListerWin32::recursiveAddFiles(std::vector<std::string> &filenames, const std::string &path, bool recursive)
{
    // oss is the search string passed into FindFirst and FindNext.
    // bdir is the base directory which is used to form pathnames.
    // It always has a trailing backslash available for concatenation.
    std::ostringstream bdir, oss;

    std::string cleanedPath = Path::toNativeSeparators(path);

    oss << cleanedPath;

    if (MyIsDirectory(cleanedPath.c_str()))
    {
        char c = cleanedPath[ cleanedPath.size()-1 ];
        switch (c)
        {
        case '\\':
            oss << '*';
            bdir << cleanedPath;
            break;
        case '*':
            bdir << cleanedPath.substr(0, cleanedPath.length() - 1);
            break;
        default:
            oss << "\\*";
            bdir << cleanedPath << '\\';
        }
    }
    else
    {
        std::string::size_type pos;
        pos = cleanedPath.find_last_of('\\');
        if (std::string::npos != pos)
        {
            bdir << cleanedPath.substr(0, pos + 1);
        }
    }

    WIN32_FIND_DATA ffd;
    HANDLE hFind = MyFindFirstFile(oss.str(), &ffd);
    if (INVALID_HANDLE_VALUE == hFind)
        return;

    do
    {
        if (ffd.cFileName[0] == '.' || ffd.cFileName[0] == '\0')
            continue;

#if defined(UNICODE)
        char * ansiFfd = new char[wcslen(ffd.cFileName) + 1];
        TransformUcs2ToAnsi(ffd.cFileName, ansiFfd, wcslen(ffd.cFileName) + 1);
#else // defined(UNICODE)
        char * ansiFfd = &ffd.cFileName[0];
#endif // defined(UNICODE)

        std::ostringstream fname;
        fname << bdir.str().c_str() << ansiFfd;

        if ((ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0)
        {
            // File

            // If recursive is not used, accept all files given by user
            if (!recursive || FileLister::acceptFile(ansiFfd))
            {
                const std::string nativename = Path::fromNativeSeparators(fname.str());
                filenames.push_back(nativename);
            }
        }
        else if (recursive)
        {
            // Directory
            getFileLister()->recursiveAddFiles(filenames, fname.str().c_str(), recursive);
        }
#if defined(UNICODE)
        delete [] ansiFfd;
#endif // defined(UNICODE)
    }
    while (FindNextFile(hFind, &ffd) != FALSE);

    if (INVALID_HANDLE_VALUE != hFind)
    {
        FindClose(hFind);
        hFind = INVALID_HANDLE_VALUE;
    }
}

bool FileListerWin32::sameFileName(const std::string &fname1, const std::string &fname2)
{
#ifdef __GNUC__
    return bool(strcasecmp(fname1.c_str(), fname2.c_str()) == 0);
#endif
#ifdef __BORLANDC__
    return bool(stricmp(fname1.c_str(), fname2.c_str()) == 0);
#endif
#ifdef _MSC_VER
    return bool(_stricmp(fname1.c_str(), fname2.c_str()) == 0);
#endif
}

#endif // _WIN32