# -*- coding: utf-8 -*-
# This file is part of lyx2lyx
# Copyright (C) 2024 The LyX 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 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

""" Convert files to the file format generated by lyx 2.5"""

import re, string
import unicodedata
import sys, os

from datetime import (datetime, date, time)

# Uncomment only what you need to import, please.

from parser_tools import (find_end_of_inset, find_end_of_layout, find_token, find_re)
#    count_pars_in_inset, del_complete_lines, del_token, find_end_of,
#    find_token_backwards, find_token_exact, get_bool_value,
#    get_containing_inset, get_containing_layout, get_option_value, get_value,
#    get_quoted_value, is_in_inset,
#    del_value, 
#    find_complete_lines,
#    find_re, find_substring,
#    set_bool_value
#    find_tokens, check_token

#from lyx2lyx_tools import (put_cmd_in_ert, add_to_preamble, insert_to_preamble, lyx2latex,
#                           revert_language, revert_flex_inset, str2bool)
#  revert_font_attrs, latex_length
#  get_ert, lyx2verbatim, length_in_bp, convert_info_insets
#  revert_flex_inset, hex2ratio

####################################################################
# Private helper functions



###############################################################################
###
### Conversion and reversion routines
###
###############################################################################

def convert_url_escapes(document):
    """Unescape # and % in URLs with hyperref."""

    hyperref = find_token(document.header, "\\use_hyperref true", 0) != -1
    beamer = document.textclass in ['beamer', 'scrarticle-beamer', 'beamerposter', 'article-beamer']

    if not hyperref and not beamer:
        return

    rurl = re.compile(r'^[%#].*')
    i = 0
    while True:
        i = find_token(document.body, "\\begin_inset Flex URL", i)
        if i == -1:
            return
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Could not find end of URL inset.")
            i += 1
            continue
        while True:
            surl = find_re(document.body, rurl, i, j)
            if surl == -1:
                i = j
                break
            if document.body[surl - 1] == "\\backslash":
                del document.body[surl - 1]
            i = surl
        

def revert_url_escapes(document):
    """Unescape # and % in URLs with hyperref."""

    hyperref = find_token(document.header, "\\use_hyperref true", 0) != -1
    beamer = document.textclass in ['beamer', 'scrarticle-beamer', 'beamerposter', 'article-beamer']

    if not hyperref and not beamer:
        return

    rurl = re.compile(r'^(.*)([%#].*)')
    i = 0
    while True:
        i = find_token(document.body, "\\begin_inset Flex URL", i)
        if i == -1:
            return
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Could not find end of URL inset.")
            i += 1
            continue
        while True:
            surl = find_re(document.body, rurl, i, j)
            if surl == -1:
                i = j
                break
            m = rurl.match(document.body[surl])
            if m:
                if m.group(1) == "" and document.body[surl - 1] == "\\backslash":
                    break
                document.body[surl : surl + 1] = [m.group(1), "\\backslash", m.group(2)]
            i = surl

def convert_url_escapes2(document):
    """Unescape backslashes in URLs with hyperref."""

    i = find_token(document.header, "\\use_hyperref true", 0)
   
    if i == -1 and document.textclass not in ['beamer', 'scrarticle-beamer', 'beamerposter', 'article-beamer']:
        return

    i = 0
    while True:
        i = find_token(document.body, "\\begin_inset Flex URL", i + 1)
        if i == -1:
            return
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Could not find end of URL inset.")
            i += 1
            continue
        while True:
            bs = find_token(document.body, "\\backslash", i, j)
            if bs == -1:
                break
            if document.body[bs + 2] == "\\backslash":
                del document.body[bs + 2]
            i = bs + 1

def revert_url_escapes2(document):
    """Escape backslashes in URLs with hyperref."""

    i = find_token(document.header, "\\use_hyperref true", 0)
   
    if i == -1 and document.textclass not in ['beamer', 'scrarticle-beamer', 'beamerposter', 'article-beamer']:
        return

    i = 0
    while True:
        i = find_token(document.body, "\\begin_inset Flex URL", i + 1)
        if i == -1:
            return
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Could not find end of URL inset.")
            i += 1
            continue
        while True:
            bs = find_token(document.body, "\\backslash", i, j)
            if bs == -1:
                break
            document.body[bs] = "\\backslash\\backslash"
            i = bs + 1

##
# Conversion hub
#

supported_versions = ["2.5.0", "2.5"]
convert = [
           [621, [convert_url_escapes, convert_url_escapes2]]
          ]


revert =  [[620, [revert_url_escapes2, revert_url_escapes]]
          ]


if __name__ == "__main__":
    pass