#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# jp: a SàT command line tool
# Copyright (C) 2009-2017 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# 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 Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


import base
from sat.core.i18n import _
from sat_frontends.jp.constants import Const as C
from sat.tools.common.ansi import ANSI as A
import json

__commands__ = ["Debug"]


class BridgeCommon(object):

    def evalArgs(self):
        if self.args.arg:
            try:
                return eval(u'[{}]'.format(u",".join(self.args.arg)))
            except SyntaxError as e:
                self.disp(u"Can't evaluate arguments: {mess}\n{text}\n{offset}^".format(
                    mess=e,
                    text=e.text.decode('utf-8'),
                    offset=u" "*(e.offset-1)
                    ), error=True)
                self.host.quit(C.EXIT_BAD_ARG)
        else:
            return []


class Method(base.CommandBase, BridgeCommon):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'method', help=_(u'call a bridge method'))
        BridgeCommon.__init__(self)
        self.need_loop=True

    def add_parser_options(self):
        self.parser.add_argument("method", type=str, help=_(u"name of the method to execute"))
        self.parser.add_argument("arg", type=base.unicode_decoder, nargs="*", help=_(u"argument of the method"))

    def method_cb(self, ret=None):
        if ret is not None:
            self.disp(unicode(ret))
        self.host.quit()

    def method_eb(self, failure):
        self.disp(_(u"Error while executing {}: {}".format(self.args.method, failure)), error=True)
        self.host.quit(C.EXIT_ERROR)

    def start(self):
        method = getattr(self.host.bridge, self.args.method)
        args = self.evalArgs()
        try:
            method(*args, profile=self.profile, callback=self.method_cb, errback=self.method_eb)
        except TypeError:
            # maybe the method doesn't need a profile ?
            try:
                method(*args, callback=self.method_cb, errback=self.method_eb)
            except TypeError:
                self.method_eb(_(u"bad arguments"))


class Signal(base.CommandBase, BridgeCommon):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'signal', help=_(u'send a fake signal from backend'))
        BridgeCommon.__init__(self)

    def add_parser_options(self):
        self.parser.add_argument("signal", type=str, help=_(u"name of the signal to send"))
        self.parser.add_argument("arg", type=base.unicode_decoder, nargs="*", help=_(u"argument of the signal"))

    def start(self):
        args = self.evalArgs()
        json_args = json.dumps(args)
        # XXX: we use self.args.profile and not self.profile
        #      because we want the raw profile_key (so plugin handle C.PROF_KEY_NONE)
        self.host.bridge.debugFakeSignal(self.args.signal, json_args, self.args.profile)


class Bridge(base.CommandBase):
    subcommands = (Method, Signal)

    def __init__(self, host):
        super(Bridge, self).__init__(host, 'bridge', use_profile=False, help=_('bridge s(t)imulation'))


class Monitor(base.CommandBase):

    def __init__(self, host):
        super(Monitor, self).__init__(host,
                                      'monitor',
                                      use_verbose=True,
                                      use_profile=False,
                                      use_output=C.OUTPUT_XML,
                                      help=_('monitor XML stream'))
        self.need_loop = True

    def add_parser_options(self):
        self.parser.add_argument("-d", "--direction", choices=('in', 'out', 'both'), default='both', help=_(u"stream direction filter"))

    def printXML(self, direction, xml_data, profile):
        if self.args.direction == 'in' and direction != 'IN':
            return
        if self.args.direction == 'out' and direction != 'OUT':
            return
        verbosity = self.host.verbosity
        if not xml_data.strip():
            if verbosity <= 2:
                return
            whiteping = True
        else:
            whiteping = False

        if verbosity:
            profile_disp = u' ({})'.format(profile) if verbosity>1 else u''
            if direction == 'IN':
                self.disp(A.color(A.BOLD, A.FG_YELLOW, '<<<===== IN ====', A.FG_WHITE, profile_disp))
            else:
                self.disp(A.color(A.BOLD, A.FG_CYAN, '==== OUT ====>>>', A.FG_WHITE, profile_disp))
        if whiteping:
            self.disp('[WHITESPACE PING]')
        else:
            try:
                self.output(xml_data)
            except Exception:
                # initial stream is not valid XML,
                # in this case we print directly to data
                # FIXME: we should test directly lxml.etree.XMLSyntaxError
                #        but importing lxml directly here is not clean
                #        should be wrapped in a custom Exception
                self.disp(xml_data)
                self.disp(u'')

    def start(self):
        self.host.bridge.register_signal('xmlLog', self.printXML, 'plugin')


class Debug(base.CommandBase):
    subcommands = (Bridge, Monitor)

    def __init__(self, host):
        super(Debug, self).__init__(host, 'debug', use_profile=False, help=_('debugging tools'))