# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:

# Copyright 2014-2017 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
#
# This file is part of qutebrowser.
#
# qutebrowser 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, either version 3 of the License, or
# (at your option) any later version.
#
# qutebrowser 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 qutebrowser.  If not, see <http://www.gnu.org/licenses/>.

"""Custom astroid checker for config calls."""

import sys
import os
import os.path

import yaml
import astroid
from pylint import interfaces, checkers
from pylint.checkers import utils


class ConfigChecker(checkers.BaseChecker):

    """Custom astroid checker for config calls."""

    __implements__ = interfaces.IAstroidChecker
    name = 'config'
    msgs = {
        'E0000': ('%s is no valid config option.',  # flake8: disable=S001
                  'bad-config-call',
                  None),
        'E0001': ('old config call',  # flake8: disable=S001
                  'old-config-call',
                  None),
    }
    priority = -1

    @utils.check_messages('bad-config-call')
    def visit_call(self, node):
        """Visit a Call node."""
        if hasattr(node, 'func'):
            infer = utils.safe_infer(node.func)
            if infer and infer.root().name == 'qutebrowser.config.config':
                if getattr(node.func, 'attrname', None) in ['get', 'set']:
                    self._check_config(node)

    def _check_config(self, node):
        """Check that the arguments to config.get(...) are valid."""
        # try:
        #     sect_arg = utils.get_argument_from_call(node, position=0,
        #                                             keyword='sectname')
        #     opt_arg = utils.get_argument_from_call(node, position=1,
        #                                            keyword='optname')
        # except utils.NoSuchArgumentError:
        #     return
        # sect_arg = utils.safe_infer(sect_arg)
        # opt_arg = utils.safe_infer(opt_arg)
        # if not (isinstance(sect_arg, astroid.Const) and
        #         isinstance(opt_arg, astroid.Const)):
        #     return
        # try:
        #     configdata.DATA[sect_arg.value][opt_arg.value]
        # except KeyError:
        #     self.add_message('bad-config-call', node=node,
        #                      args=(sect_arg.value, opt_arg.value))

        self.add_message('old-config-call', node=node)


def register(linter):
    """Register this checker."""
    linter.register_checker(ConfigChecker(linter))