#!/usr/bin/env python
# -*- coding: utf-8 -*-

# This file is part of Beremiz, a Integrated Development Environment for
# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
#
# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
#
# See COPYING file for copyrights details.
#
# 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 2
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.



import os
import sys
import wx
import subprocess
from dialogs import MessageBoxOnce


def _get_inkscape_path():
    """ Return the Inkscape binary path """

    if sys.platform.startswith('win32'):
        import winreg
        inkcmd = None
        tries = [(winreg.HKEY_LOCAL_MACHINE, 'Software\\Classes\\svgfile\\shell\\Inkscape\\command'),
                 (winreg.HKEY_LOCAL_MACHINE, 'Software\\Classes\\inkscape.svg\\shell\\open\\command'),
                 (winreg.HKEY_CURRENT_USER, 'Software\\Classes\\inkscape.svg\\shell\\open\\command')]

        for subreg, key in tries:
            try:
                inkcmd = winreg.QueryValue(subreg, key)
                break;
            except OSError:
                pass

        if inkcmd is None:
            return None

        return inkcmd.replace('"%1"', '').strip().replace('"', '').encode()

    else:
        try:
            return subprocess.check_output("command -v inkscape", shell=True).strip()
        except subprocess.CalledProcessError:
            return None

_inkscape_path = None
def get_inkscape_path():
    """ Return the Inkscape binary path """

    global _inkscape_path

    if _inkscape_path is not None:
        return _inkscape_path

    _inkscape_path = _get_inkscape_path()
    return _inkscape_path


def _get_inkscape_version():
    inkpath = get_inkscape_path()
    if inkpath is None:
        return None
    version_string = subprocess.check_output(
            [inkpath,"--version"], 
            stderr=subprocess.STDOUT)
    if version_string:
        return list(map(int,version_string.split()[1].split(b'.')))
    return [0,0]

_inkscape_version = None
def get_inkscape_version():
    global _inkscape_version

    if _inkscape_version is not None:
        return _inkscape_version

    _inkscape_version = _get_inkscape_version()
    return _inkscape_version

if "SNAP" in os.environ:
    def open_svg(svgfile):
        MessageBoxOnce("Launching Inkscape with xdg-open",
                "Confined app can't launch Inkscape directly.\n"+
                    "Instead, SVG file is passed to xdg-open.\n"+
                    "Please select Inskape when proposed.\n\n"+
                    "Notes: \n"+
                    " - Inkscape must be installed on you system.\n"+
                    " - If no choice is proposed, use file manager to change SVG file properties.\n",
                "DocSVGSnapWarning")

        subprocess.Popen(["xdg-open",svgfile])
else:
    def open_svg(svgfile):
        """ Generic function to open SVG file """
        inkpath = get_inkscape_path()
        if inkpath is None:
            wx.MessageBox("Inkscape is not found or installed !")
        else:
            subprocess.Popen([inkpath,svgfile])