// os_win32.C copyright "Ruurd A. Reitsma" <R.A.Reitsma@wbmt.tudelft.nl>

// Various OS specific functions
#include <config.h>

#include "os.h"
#include "support/filetools.h"
#include "support/lstrings.h"
#include "debug.h"

#include <windows.h>
#include <io.h>
#include <sys/cygwin.h>


string os::binpath_ = string();
string os::binname_ = string();
string os::tmpdir_ = string();
os::shell_type os::_shell = os::UNIX;
unsigned long os::cp_ = 0;

using std::endl;

void os::init(int * /* argc */, char ** argv[]) {
	static bool initialized = false;
	if (initialized) return;
	initialized = true;
	string tmp = *argv[0];
	binname_ = OnlyFilename(tmp);
	tmp = ExpandPath(tmp); // This expands ./ and ~/

	if (!is_absolute_path(tmp)) {
		string binsearchpath = GetEnvPath("PATH");
		// This will make "src/lyx" work always :-)
		binsearchpath += ";.";
		tmp = *argv[0];
		tmp = FileOpenSearch(binsearchpath, tmp);
	}

	tmp = MakeAbsPath(OnlyPath(tmp));

	// In case we are running in place and compiled with shared libraries
	if (suffixIs(tmp, "/.libs/"))
		tmp.erase(tmp.length()-6, string::npos);
	binpath_ = tmp;
}

void os::warn(string mesg) {
	MessageBox(0, mesg.c_str(), "LyX error",
	MB_OK|MB_ICONSTOP|MB_SYSTEMMODAL);
	}

string os::current_root() {
	return string("/");
}

string::size_type os::common_path(string const &p1, string const &p2) {
	string::size_type i = 0,
			p1_len = p1.length(),
			p2_len = p2.length();
	while (i < p1_len && i < p2_len && uppercase(p1[i]) == uppercase(p2[i])) ++i;
	if ((i < p1_len && i < p2_len)
	    || (i < p1_len && p1[i] != '/' && i == p2_len)
	    || (i < p2_len && p2[i] != '/' && i == p1_len)) {
		if (i) --i;     // here was the last match
		while (i && p1[i] != '/') --i;
	}
	return i;
}

string os::slashify_path(string p) {
		return subst(p, '\\', '/');
}

string os::external_path(string const & p) {
	string dos_path=p;
	if (is_absolute_path(p)) {
		char dp[255];
		cygwin_conv_to_full_win32_path(p.c_str(), dp);
		dos_path=subst(dp,'\\','/');
	}
	lyxerr[Debug::LATEX]
		<< "<Win32 path correction> ["
		<< p << "]->>["
		<< dos_path << "]" << endl;
	return dos_path;
}


// (Claus H.) Parsing the latex log file in an Win32 environment all
// files are mentioned in Win32/DOS syntax. Because LyX uses the dep file
// entries to check if any file has been changed we must retranslate
// the Win32/DOS pathnames into Cygwin pathnames.
string os::internal_path(string const &p) {
	char pp[256];
	cygwin_conv_to_posix_path(p.c_str(), pp);
	string const posix_path = MakeLatexName(pp);
	lyxerr[Debug::DEPEND]
		<< "<Win32 path correction> ["
		<< p << "]->>["
		<< posix_path << "]" << endl;
	return posix_path;
}

// (Claus H.) On Win32 both Unix and Win32/DOS pathnames are used.
// Therefore an absolute path could be either a pathname starting
// with a slash (Unix) or a pathname starting with a drive letter
// followed by a colon. Because a colon is not valid in pathes in Unix
// and at another location in Win32 testing just for the existance
// of the colon in the 2nd position seems to be enough!
bool os::is_absolute_path(string const & p)
{
	if (p.empty())
		return false;

	bool isDosPath = (p.length() > 1 && p[1] == ':');
	bool isUnixPath = (p[0] == '/');

	return isDosPath | isUnixPath;
}

// returns a string suitable to be passed to fopen when
// reading a file
char const * os::read_mode()
{
	return "rb";
}

// returns a string suitable to be passed to popen when
// reading a pipe
char const * os::popen_read_mode()
{
	return "r";
}