#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright (C) 2026 Étienne Loks  <etienne.loks at iggdrasil dot net>

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# See the file COPYING for details.

import re
import sys


def int_to_superscript(s):
    return ''.join(dict(zip("0123456789", "⁰¹²³⁴⁵⁶⁷⁸⁹")).get(c, c) for c in s)


def convert_title(s):
    r = re.compile(r"^{{{([^}]*)}}}")
    return r.sub(r"### \1\n", s)


def convert_bold(s):
    r = re.compile(r"{{([^}]*)}}")
    return r.sub(r"**\1**", s)


def convert_italic(s):
    r = re.compile(r"{([^}]*)}")
    return r.sub(r"*\1*", s)


def convert_list4(s):
    r = re.compile(r"^\-\*\*\*\*")
    return r.sub(r"            -", s)


def convert_list3(s):
    r = re.compile(r"^\-\*\*\*")
    return r.sub(r"        -", s)


def convert_list2(s):
    r = re.compile(r"^\-\*\*")
    return r.sub(r"    -", s)


def convert_list1(s):
    r = re.compile(r"^\-\*")
    return r.sub(r"-", s)


def convert_list_num(s):
    r = re.compile(r"^\-\#")
    return r.sub(r"1.", s)


def convert_link(s):
    r = re.compile(r"\[([^-]*[^ ]+)[ ]*\->(.*)\]")
    return r.sub(r"[\1](\2)", s)


def convert_superscript(s):
    r = re.compile(r"\[\[(\d+)\]\]")
    return r.sub(lambda x: int_to_superscript(x.group(1)), s)


def convert_quote(s):
    r = re.compile(r"<quote>([^<]+)</quote>")
    return r.sub(r"> \1\n", s)


def spip_to_markdown(s):
    # do not modify the modifiers order
    modifiers = [convert_title, convert_bold, convert_italic,
                 convert_list4, convert_list3, convert_list2,
                 convert_list1, convert_list_num, convert_link,
                 convert_superscript, convert_quote]
    res = []
    for line in s.split("\n"):
        for modifier in modifiers:
            line = modifier(line)
        res.append(line)
    return "\n".join(res)


TEST = """
{{{Titre}}}
{{{Titre32}}}
{{Gras}}  {{Gras 2}}
{Italique}
-* liste 1
-** liste niveau2
-*** liste niveau3
-**** liste niveau4
-# liste numerotée 1
-# liste numerotée 2
[Lien web ->https://ishtar-archeo.net/]
élément[[12]]  # exposant 12
<quote>Citation</quote>
"""

RES = """
### Titre

### Titre32

**Gras**  **Gras 2**
*Italique*
- liste 1
    - liste niveau2
        - liste niveau3
            - liste niveau4
1. liste numerotée 1
1. liste numerotée 2
[Lien web](https://ishtar-archeo.net/)
élément¹²  # exposant 12
> Citation

"""


if __name__ == '__main__':
    # test
    if len(sys.argv) < 2:
        res = spip_to_markdown(TEST)
        if res == RES:
            sys.stdout.write("* Test OK\n")
        else:
            sys.stdout.write("* Test NOK\n")
        sys.exit(0)
    with open(sys.argv[1], "r") as s:
        sys.stdout.write(spip_to_markdown(s))
    sys.exit(0)