#!/usr/bin/env python
# License: GPLv3 Copyright: 2016, Kovid Goyal <kovid at kovidgoyal.net>


import os
import re
import sys

from lxml import etree

SVG_NS = 'http://www.w3.org/2000/svg'
XLINK_NS = 'http://www.w3.org/1999/xlink'


def clone_node(node, parent):
    ans = parent.makeelement(node.tag)
    for k in node.keys():
        ans.set(k, node.get(k))
    ans.text, ans.tail = node.text, node.tail
    for child in node.iterchildren('*'):
        clone_node(child, ans)
    parent.append(ans)
    return ans


def merge():
    base = os.path.dirname(os.path.abspath(__file__))
    ans = etree.fromstring(
        f'<svg xmlns="{SVG_NS}" xmlns:xlink="{XLINK_NS}"/>',
        parser=etree.XMLParser(
            recover=True, no_network=True, resolve_entities=False
        )
    )
    for f in sorted(os.listdir(base)):
        if not f.endswith('.svg'):
            continue
        with open(os.path.join(base, f), 'rb') as ff:
            raw = ff.read()
        svg = etree.fromstring(
            raw,
            parser=etree.XMLParser(
                recover=True, no_network=True, resolve_entities=False
            )
        )
        symbol = ans.makeelement('{%s}symbol' % SVG_NS)  # noqa: UP031
        symbol.set('viewBox', svg.get('viewBox'))
        symbol.set('id', 'icon-' + f.rpartition('.')[0])
        for child in svg.iterchildren('*'):
            clone_node(child, symbol)
        ans.append(symbol)
    ans = etree.tostring(ans, encoding='unicode', pretty_print=True, with_tail=False)
    ans = re.sub(r'<svg[^>]+>', '<svg style="display:none">', ans, count=1)
    return ans


if __name__ == '__main__':
    sys.stdout.write(merge().encode('utf-8'))
