# -*- coding: utf-8 -*-
import sys
import argparse
import transaction

from cliff.app import App
from cliff.command import Command
from cliff.commandmanager import CommandManager

from pyramid.paster import bootstrap
from pyramid.scripting import AppEnvironment
from tracim.exceptions import CommandAbortedError
from tracim.lib.utils.utils import DEFAULT_TRACIM_CONFIG_FILE


class TracimCLI(App):
    def __init__(self) -> None:
        super(TracimCLI, self).__init__(
            description='TracimCli',
            version='0.1',
            command_manager=CommandManager('tracimcli'),
            deferred_help=True,
            )

    def initialize_app(self, argv) -> None:
        self.LOG.debug('initialize_app')

    def prepare_to_run_command(self, cmd) -> None:
        self.LOG.debug('prepare_to_run_command %s', cmd.__class__.__name__)

    def clean_up(self, cmd, result, err) -> None:
        self.LOG.debug('clean_up %s', cmd.__class__.__name__)
        if err:
            self.LOG.debug('got an error: %s', err)


def main(argv=sys.argv[1:]):
    myapp = TracimCLI()
    return myapp.run(argv)


if __name__ == "__main__":
    main()


class AppContextCommand(Command):
    """
    Command who initialize app context at beginning of take_action method.
    """
    auto_setup_context = True

    def take_action(self, parsed_args: argparse.Namespace) -> None:
        super(AppContextCommand, self).take_action(parsed_args)
        if self.auto_setup_context:
            with bootstrap(parsed_args.config_file) as app_context:
                with app_context['request'].tm:
                    self.take_app_action(parsed_args, app_context)

    def get_parser(self, prog_name: str) -> argparse.ArgumentParser:
        parser = super(AppContextCommand, self).get_parser(prog_name)

        parser.add_argument(
            "-c",
            "--config",
            help='application config file to read (default: {})'.format(
                DEFAULT_TRACIM_CONFIG_FILE
            ),
            dest='config_file',
            default=DEFAULT_TRACIM_CONFIG_FILE,
        )
        return parser

    # def run(self, parsed_args):
    #     super().run(parsed_args)
    #     transaction.commit()


# TODO - G.M - 10-04-2018 - [Cleanup][tempExample] - Drop this
class TestTracimCommand(AppContextCommand):

    def take_app_action(
            self,
            parser: argparse.ArgumentParser,
            app_context: AppEnvironment
    ) -> None:
        print('test')


class Extender(argparse.Action):
    """
    Copied class from http://stackoverflow.com/a/12461237/801924
    """
    def __call__(self, parser, namespace, values, option_strings=None):
        # Need None here incase `argparse.SUPPRESS` was supplied for `dest`
        dest = getattr(namespace, self.dest, None)
        # print dest,self.default,values,option_strings
        if not hasattr(dest, 'extend') or dest == self.default:
            dest = []
            setattr(namespace, self.dest, dest)
            # if default isn't set to None, this method might be called
            # with the default as `values` for other arguements which
            # share this destination.
            parser.set_defaults(**{self.dest: None})
        try:
            dest.extend(values)
        except ValueError:
            dest.append(values)