from log import log


class Attrs:  # TODO: how to subclass dict properly?
    def __init__(self, attrs):
        self.attrs = attrs

    def __str__(self):
        attrs = dict(self.attrs)
        head = attrs.pop('phrase', None)
        optional = '?' if attrs.pop('optional', False) else ''
        ret = [head] if head else []
        # TODO jasně, řazení atributů se dá udělat i podle kánonu ;-)
        ret += [attr + '=' + str(val) if val is not None else attr
                for attr, val in sorted(attrs.items()) if attr != 'tag']
        return '(' + ' '.join(ret) + ')' + optional

    def match(self, chart_edge):
        for attr, match_on_indexes in sorted(
                chart_edge.rule.attr_matches.items()):
            value = None
            for index in match_on_indexes:
                if index == -1:
                    continue
                if index < chart_edge.point:
                    if attr not in chart_edge.right[index]:
                        log.warning('             %s not in %s', attr,
                                    Attrs(chart_edge.right[index]))
                        continue
                    value = chart_edge.right[index][attr]
                elif value is not None and index == chart_edge.point:
                    if attr not in self.attrs:
                        log.warning('not present  %s %s', attr,
                                    str(self))
                    # TODO: nevypisuje se! (a přesunout funkci)
                    elif value != self.attrs[attr]:
                        log.error('mismatch     %s %s != %s', attr,
                                  self.attrs[attr], value)
                        return
        return True