# -*- coding: utf-8 -*-

"""
Copyright(C) 2010  Christophe Benz, Romain Bignon

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, version 3 of the License.

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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

"""

import logging


__all__ = ['get_parser', 'NoParserFound']


class NoParserFound(Exception): pass


def get_parser(preference_order=['lxml', 'html5lib', 'elementtidy', 'builtin'], *args, **kwargs):
    """
    Get a parser from a preference order list.
    This allows Weboob to run on systems without lxml, which is the default parser.
    Return a parser implementing IParser.
    """
    if not isinstance(preference_order, (tuple, list)):
        preference_order = [preference_order]
    for kind in preference_order:
        if kind == 'lxml':
            try:
                from .lxmlparser import LxmlHtmlParser
                return LxmlHtmlParser()
            except ImportError:
                logging.debug('%s is not installed.' % kind)
        elif kind == 'html5lib':
            try:
                from .html5libparser import Html5libParser
                return Html5libParser(*args, **kwargs)
            except ImportError:
                logging.debug('%s is not installed.' % kind)
        elif kind == 'elementtidy':
            try:
                from .elementtidyparser import ElementTidyParser
                return ElementTidyParser()
            except ImportError:
                logging.debug('%s is not installed.' % kind)
        elif kind == 'builtin':
            try:
                from .htmlparser import HTMLParser
                return HTMLParser()
            except ImportError:
                logging.debug('%s is not installed.' % kind)
    raise NoParserFound()