"""
Thunder Chen<nkchenz@gmail.com> 2007.9.1
Released under the GPLv2 at https://code.google.com/archive/p/xml2dict/

Adjusted by Pierre-Yves Chibon <pingou@pingoured.fr>
"""

import re
import xml.etree.ElementTree as ET

import six


class object_dict(dict):
    """object view of dict, you can
    >>> a = object_dict()
    >>> a.fish = 'fish'
    >>> a['fish']
    'fish'
    >>> a['water'] = 'water'
    >>> a.water
    'water'
    >>> a.test = {'value': 1}
    >>> a.test2 = object_dict({'name': 'test2', 'value': 2})
    >>> a.test, a.test2.name, a.test2.value
    (1, 'test2', 2)
    """
    def __init__(self, initd=None):
        if initd is None:
            initd = {}
        dict.__init__(self, initd)

    def __getattr__(self, item):
        d = self.__getitem__(item)
        # if value is the only key in object, you can omit it
        if isinstance(d, dict) and 'value' in d and len(d) == 1:
            return d['value']
        else:
            return d

    def __setattr__(self, item, value):
        self.__setitem__(item, value)


class XML2Dict(object):

    def _parse_node(self, node):
        node_tree = object_dict()
        # Save attrs and text, hope there will not be a child with same name
        if node.text:
            node_tree.value = node.text
        for (k, v) in node.attrib.items():
            k, v = self._namespace_split(k, object_dict({'value': v}))
            node_tree[k] = v
        # Save childrens
        for child in node.getchildren():
            tag, tree = self._namespace_split(
                child.tag, self._parse_node(child))
            # the first time, so store it in dict
            if tag not in node_tree:
                node_tree[tag] = tree
                continue
            old = node_tree[tag]
            if not isinstance(old, list):
                node_tree.pop(tag)
                # multi times, so change old dict to a list
                node_tree[tag] = [old]
            node_tree[tag].append(tree)  # add the new one

        return node_tree

    def _namespace_split(self, tag, value):
        """
           Split the tag  '{http://cs.sfsu.edu/csc867/myscheduler}patients'
             ns = http://cs.sfsu.edu/csc867/myscheduler
             name = patients
        """
        result = re.compile("\{(.*)\}(.*)").search(tag)
        if result:
            value.namespace, tag = result.groups()
        return (tag, value)

    def parse(self, file):
        """parse a xml file to a dict"""
        f = open(file, 'rb')
        return self.fromstring(f.read())

    def fromstring(self, s):
        """parse a string"""
        if isinstance(s, six.text_type):
            s = s.encode('utf-8')
        t = ET.fromstring(s)
        root_tag, root_tree = self._namespace_split(
            t.tag, self._parse_node(t))
        return object_dict({root_tag: root_tree})
