/* SPDX-License-Identifier: LGPL-2.1-or-later */

#include "log.h"
#include "parse-helpers.h"
#include "path-util.h"
#include "utf8.h"

int path_simplify_and_warn(
                char *path,
                unsigned flag,
                const char *unit,
                const char *filename,
                unsigned line,
                const char *lvalue) {

        bool fatal = flag & PATH_CHECK_FATAL;

        assert(!FLAGS_SET(flag, PATH_CHECK_ABSOLUTE | PATH_CHECK_RELATIVE));

        if (!utf8_is_valid(path))
                return log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, path);

        if (flag & (PATH_CHECK_ABSOLUTE | PATH_CHECK_RELATIVE)) {
                bool absolute;

                absolute = path_is_absolute(path);

                if (!absolute && (flag & PATH_CHECK_ABSOLUTE))
                        return log_syntax(unit, LOG_ERR, filename, line, SYNTHETIC_ERRNO(EINVAL),
                                          "%s= path is not absolute%s: %s",
                                          lvalue, fatal ? "" : ", ignoring", path);

                if (absolute && (flag & PATH_CHECK_RELATIVE))
                        return log_syntax(unit, LOG_ERR, filename, line, SYNTHETIC_ERRNO(EINVAL),
                                          "%s= path is absolute%s: %s",
                                          lvalue, fatal ? "" : ", ignoring", path);
        }

        path_simplify(path);

        if (!path_is_valid(path))
                return log_syntax(unit, LOG_ERR, filename, line, SYNTHETIC_ERRNO(EINVAL),
                                  "%s= path has invalid length (%zu bytes)%s.",
                                  lvalue, strlen(path), fatal ? "" : ", ignoring");

        if (!path_is_normalized(path))
                return log_syntax(unit, LOG_ERR, filename, line, SYNTHETIC_ERRNO(EINVAL),
                                  "%s= path is not normalized%s: %s",
                                  lvalue, fatal ? "" : ", ignoring", path);

        return 0;
}