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"""
This is a unit test class used to validate how qdrouterd
behaves with different command line arguments combinations,
in order to ensure it won't break, causing bad experiences
to the users.
"""

from __future__ import unicode_literals
from __future__ import division
from __future__ import absolute_import
from __future__ import print_function

import os
import signal
from subprocess import PIPE, STDOUT
from system_test import TestCase, Qdrouterd, main_module, Process, wait_port
from system_test import unittest

class CommandLineTest(TestCase):
    """
    System tests for command line arguments parsing
    """
    testport = 0
    testname = ""

    @classmethod
    def setUpClass(cls):
        """Uses a default config for testing"""

        super(CommandLineTest, cls).setUpClass()
        cls.name = "test-router-1"
        CommandLineTest.testname = cls.name
        CommandLineTest.testport = cls.tester.get_port()
        cls.config = Qdrouterd.Config([
            ('router', {'mode': 'standalone', 'id': CommandLineTest.name}),
            ('listener', {'port': CommandLineTest.testport}),
            ('log',{'module':'DEFAULT', 'enable':'trace+', 'includeSource': 'true', 'outputFile': os.getcwd()+"/"+CommandLineTest.name+'.log'})
        ])

    def run_qdrouterd_as_daemon(self, config_file_name, pid_file_name):
        """
        Runs qdrouterd as a daemon, using the provided config_file_name
        in order to ensure router is able to load it, be it using a
        full or relative path.

        :param config_file_name: The configuration file name to be written
        :param pid_file_name: PID file name (must be full path)
        :return:
        """
        pipe = self.popen(
            [os.path.join(os.environ.get('BUILD_DIR'), 'router', 'qdrouterd'), '-d',
             '-I', os.path.join(os.environ.get('SOURCE_DIR'), 'python'),
             '-c', self.config.write(config_file_name), '-P', pid_file_name],
            stdout=PIPE, stderr=STDOUT, expect=Process.EXIT_OK,
            universal_newlines=True)
        out = pipe.communicate()[0]
        wait_port(CommandLineTest.testport)

        try:
            pipe.teardown()
            # kill qdrouterd running as a daemon
            with open(pid_file_name, 'r') as pidfile:
                for line in pidfile:
                    os.kill(int(line), signal.SIGTERM)
            pidfile.close()
        except OSError as ex:
            raise Exception("%s\n%s" % (ex, out))


    def test_01_config_relative_path(self):
        """
        Starts qdrouterd as daemon, enforcing a config file name with
        relative path.
        """

        try:
            self.run_qdrouterd_as_daemon("test-router", os.getcwd()+'/test.pid')
        except OSError as ex:
            self.fail(ex)

class CommandLineTest2(TestCase):
    """
    System tests for command line arguments parsing
    """
    testport = 0
    testname = ""

    @classmethod
    def setUpClass(cls):
        """Uses a default config for testing"""

        super(CommandLineTest2, cls).setUpClass()
        cls.name = "test-router-2"
        CommandLineTest2.testname = cls.name
        CommandLineTest2.testport = cls.tester.get_port()
        # output has been deprecated. We are using it here to test backward compatibility.
        cls.config = Qdrouterd.Config([
            ('router', {'mode': 'standalone', 'id': CommandLineTest2.testname}),
            ('listener', {'port': CommandLineTest2.testport}),
            ('log',{'module':'DEFAULT', 'enable':'trace+', 'includeSource': 'true', 'output': os.getcwd()+"/"+CommandLineTest2.name+'.log'})
        ])

    def run_qdrouterd_as_daemon(self, config_file_name, pid_file_name):
        """
        Runs qdrouterd as a daemon, using the provided config_file_name
        in order to ensure router is able to load it, be it using a
        full or relative path.

        :param config_file_name: The configuration file name to be written
        :param pid_file_name: PID file name (must be full path)
        :return:
        """
        pipe = self.popen(
            [os.path.join(os.environ.get('BUILD_DIR'), 'router', 'qdrouterd'), '-d',
             '-I', os.path.join(os.environ.get('SOURCE_DIR'), 'python'),
             '-c', self.config.write(config_file_name), '-P', pid_file_name],
            stdout=PIPE, stderr=STDOUT, expect=Process.EXIT_OK,
            universal_newlines=True)
        out = pipe.communicate()[0]
        wait_port(CommandLineTest2.testport)

        try:
            pipe.teardown()
            # kill qdrouterd running as a daemon
            with open(pid_file_name, 'r') as pidfile:
                for line in pidfile:
                    os.kill(int(line), signal.SIGTERM)
            pidfile.close()
        except OSError as ex:
            raise Exception("%s\n%s" % (ex, out))


    def test_02_config_full_path(self):
        """
        Starts qdrouterd as daemon, enforcing a config file name with
        full path.
        """

        try:
            self.run_qdrouterd_as_daemon(os.getcwd() + "/test-router-2.conf",
                                pid_file_name=os.getcwd()+'/test.pid')
        except OSError as ex:
            self.fail(ex)


if __name__ == '__main__':
    unittest.main(main_module())