from __future__ import absolute_import
# Copyright (c) 2010-2015 openpyxl


import os
from zipfile import ZipFile

from lxml.etree import XMLSchema
from lxml.etree import parse

# Provide schema based validators, lxml required
# use schema.validate(Element) or schema.assertValid(Element) for messages

SCHEMA_FOLDER = os.path.join(os.path.dirname(__file__), 'schemas')

sheet_src = os.path.join(SCHEMA_FOLDER, 'sml.xsd')
sheet_schema = XMLSchema(file=sheet_src)

chart_src = os.path.join(SCHEMA_FOLDER, 'dml-chart.xsd')
chart_schema = XMLSchema(file=chart_src)

drawing_src = os.path.join(SCHEMA_FOLDER, 'dml-spreadsheetDrawing.xsd')
drawing_schema = XMLSchema(file=drawing_src)

drawing_main_src = os.path.join(SCHEMA_FOLDER, "dml-main.xsd")

shared_src = os.path.join(SCHEMA_FOLDER, "shared-commonSimpleTypes.xsd")

sml_files = ['xl/styles.xml']  # , 'xl/workbook.xml']


def validate_archive(file_path):
    zipfile = ZipFile(file_path)
    try:
        for entry in zipfile.infolist():
            filename = entry.filename
            f = zipfile.open(entry)
            root = parse(f).getroot()
            if filename in sml_files or filename.startswith('xl/worksheets/sheet'):
                if root.get('{http://www.w3.org/XML/1998/namespace}space'):
                    # not allowed by schema
                    del root.attrib['{http://www.w3.org/XML/1998/namespace}space']
                sheet_schema.assertValid(root)
    finally:
        zipfile.close()


