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import os
import logging
import subprocess
import time
import unittest

from oeqa.selftest.case import OESelftestTestCase
from oeqa.utils.commands import runCmd, bitbake, get_bb_var, get_bb_vars
from qemucommand import QemuCommand


class SotaToolsTests(OESelftestTestCase):

    @classmethod
    def setUpClass(cls):
        logger = logging.getLogger("selftest")
        logger.info('Running bitbake to build aktualizr-native tools')
        bitbake('aktualizr-native')

    def test_push_help(self):
        bb_vars = get_bb_vars(['SYSROOT_DESTDIR', 'bindir'], 'aktualizr-native')
        p = bb_vars['SYSROOT_DESTDIR'] + bb_vars['bindir'] + "/" + "garage-push"
        self.assertTrue(os.path.isfile(p), msg = "No garage-push found (%s)" % p)
        result = runCmd('%s --help' % p, ignore_status=True)
        self.assertEqual(result.status, 0, "Status not equal to 0. output: %s" % result.output)

    def test_deploy_help(self):
        bb_vars = get_bb_vars(['SYSROOT_DESTDIR', 'bindir'], 'aktualizr-native')
        p = bb_vars['SYSROOT_DESTDIR'] + bb_vars['bindir'] + "/" + "garage-deploy"
        self.assertTrue(os.path.isfile(p), msg = "No garage-deploy found (%s)" % p)
        result = runCmd('%s --help' % p, ignore_status=True)
        self.assertEqual(result.status, 0, "Status not equal to 0. output: %s" % result.output)

    def test_garagesign_help(self):
        bb_vars = get_bb_vars(['SYSROOT_DESTDIR', 'bindir'], 'aktualizr-native')
        p = bb_vars['SYSROOT_DESTDIR'] + bb_vars['bindir'] + "/" + "garage-sign"
        self.assertTrue(os.path.isfile(p), msg = "No garage-sign found (%s)" % p)
        result = runCmd('%s --help' % p, ignore_status=True)
        self.assertEqual(result.status, 0, "Status not equal to 0. output: %s" % result.output)


class HsmTests(OESelftestTestCase):

    def test_hsm(self):
        self.write_config('SOTA_CLIENT_FEATURES="hsm"')
        bitbake('core-image-minimal')


class GeneralTests(OESelftestTestCase):

    def test_feature_sota(self):
        result = get_bb_var('DISTRO_FEATURES').find('sota')
        self.assertNotEqual(result, -1, 'Feature "sota" not set at DISTRO_FEATURES');

    def test_feature_systemd(self):
        result = get_bb_var('DISTRO_FEATURES').find('systemd')
        self.assertNotEqual(result, -1, 'Feature "systemd" not set at DISTRO_FEATURES');

    def test_credentials(self):
        bitbake('core-image-minimal')
        credentials = get_bb_var('SOTA_PACKED_CREDENTIALS')
        # skip the test if the variable SOTA_PACKED_CREDENTIALS is not set
        if credentials is None:
            raise unittest.SkipTest("Variable 'SOTA_PACKED_CREDENTIALS' not set.")
        # Check if the file exists
        self.assertTrue(os.path.isfile(credentials), "File %s does not exist" % credentials)
        deploydir = get_bb_var('DEPLOY_DIR_IMAGE')
        imagename = get_bb_var('IMAGE_LINK_NAME', 'core-image-minimal')
        # Check if the credentials are included in the output image
        result = runCmd('tar -jtvf %s/%s.tar.bz2 | grep sota_provisioning_credentials.zip' % (deploydir, imagename), ignore_status=True)
        self.assertEqual(result.status, 0, "Status not equal to 0. output: %s" % result.output)

    def test_java(self):
        result = runCmd('which java', ignore_status=True)
        self.assertEqual(result.status, 0, "Java not found.")

    def test_add_package(self):
        print('')
        deploydir = get_bb_var('DEPLOY_DIR_IMAGE')
        imagename = get_bb_var('IMAGE_LINK_NAME', 'core-image-minimal')
        image_path = deploydir + '/' + imagename + '.otaimg'
        logger = logging.getLogger("selftest")

        logger.info('Running bitbake with man in the image package list')
        self.write_config('IMAGE_INSTALL_append = " man "')
        bitbake('-c cleanall man')
        bitbake('core-image-minimal')
        result = runCmd('oe-pkgdata-util find-path /usr/bin/man')
        self.assertEqual(result.output, 'man: /usr/bin/man')
        path1 = os.path.realpath(image_path)
        size1 = os.path.getsize(path1)
        logger.info('First image %s has size %i' % (path1, size1))

        logger.info('Running bitbake without man in the image package list')
        self.write_config('IMAGE_INSTALL_remove = " man "')
        bitbake('-c cleanall man')
        bitbake('core-image-minimal')
        result = runCmd('oe-pkgdata-util find-path /usr/bin/man', ignore_status=True)
        self.assertEqual(result.status, 1, "Status different than 1. output: %s" % result.output)
        self.assertEqual(result.output, 'ERROR: Unable to find any package producing path /usr/bin/man')
        path2 = os.path.realpath(image_path)
        size2 = os.path.getsize(path2)
        logger.info('Second image %s has size %i' % (path2, size2))
        self.assertNotEqual(path1, path2, "Image paths are identical; image was not rebuilt.")
        self.assertNotEqual(size1, size2, "Image sizes are identical; image was not rebuilt.")


class QemuTests(OESelftestTestCase):

    @classmethod
    def setUpClass(cls):
        cls.qemu, cls.s = qemu_launch(machine='qemux86-64')

    @classmethod
    def tearDownClass(cls):
        qemu_terminate(cls.s)

    def test_hostname(self):
        print('')
        print('Checking machine name (hostname) of device:')
        value, err = qemu_send_command(self.qemu.ssh_port, 'hostname')
        machine = get_bb_var('MACHINE', 'core-image-minimal')
        self.assertEqual(err, b'', 'Error: ' + err.decode())
        # Strip off line ending.
        value_str = value.decode()[:-1]
        self.assertEqual(value_str, machine,
                         'MACHINE does not match hostname: ' + machine + ', ' + value_str)
        print(value_str)

    def test_var_sota(self):
        print('')
        print('Checking contents of /var/sota:')
        value, err = qemu_send_command(self.qemu.ssh_port, 'ls /var/sota')
        self.assertEqual(err, b'', 'Error: ' + err.decode())
        print(value.decode())


class GrubTests(OESelftestTestCase):

    def setUpLocal(self):
        # This is a bit of a hack but I can't see a better option.
        path = os.path.abspath(os.path.dirname(__file__))
        metadir = path + "/../../../../"
        grub_config = 'OSTREE_BOOTLOADER = "grub"\nMACHINE = "intel-corei7-64"'
        self.append_config(grub_config)
        self.meta_intel = metadir + "meta-intel"
        self.meta_minnow = metadir + "meta-updater-minnowboard"
        runCmd('bitbake-layers add-layer "%s"' % self.meta_intel)
        runCmd('bitbake-layers add-layer "%s"' % self.meta_minnow)
        self.qemu, self.s = qemu_launch(efi=True, machine='intel-corei7-64')

    def tearDownLocal(self):
        qemu_terminate(self.s)
        runCmd('bitbake-layers remove-layer "%s"' % self.meta_intel, ignore_status=True)
        runCmd('bitbake-layers remove-layer "%s"' % self.meta_minnow, ignore_status=True)

    def test_grub(self):
        print('')
        print('Checking machine name (hostname) of device:')
        value, err = qemu_send_command(self.qemu.ssh_port, 'hostname')
        machine = get_bb_var('MACHINE', 'core-image-minimal')
        self.assertEqual(err, b'', 'Error: ' + err.decode())
        # Strip off line ending.
        value_str = value.decode()[:-1]
        self.assertEqual(value_str, machine,
                         'MACHINE does not match hostname: ' + machine + ', ' + value_str)
        print(value_str)


def qemu_launch(efi=False, machine=None):
    logger = logging.getLogger("selftest")
    logger.info('Running bitbake to build core-image-minimal')
    bitbake('core-image-minimal')
    # Create empty object.
    args = type('', (), {})()
    args.imagename = 'core-image-minimal'
    args.mac = None
    # Could use DEPLOY_DIR_IMAGE here but it's already in the machine
    # subdirectory.
    args.dir = 'tmp/deploy/images'
    args.efi = efi
    args.machine = machine
    args.kvm = None  # Autodetect
    args.no_gui = True
    args.gdb = False
    args.pcap = None
    args.overlay = None
    args.dry_run = False

    qemu = QemuCommand(args)
    cmdline = qemu.command_line()
    print('Booting image with run-qemu-ota...')
    s = subprocess.Popen(cmdline)
    time.sleep(10)
    return qemu, s

def qemu_terminate(s):
    try:
        s.terminate()
    except KeyboardInterrupt:
        pass

def qemu_send_command(port, command):
    command = ['ssh -q -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no root@localhost -p ' +
               str(port) + ' "' + command + '"']
    s2 = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    value, err = s2.communicate()
    return value, err