# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import logging
from autotest_lib.server import utils
from autotest_lib.server.cros.faft.firmware_test import FirmwareTest
from autotest_lib.client.common_lib import error


class firmware_UpdateFirmwareVersion(FirmwareTest):
    """
    Servo based firmware update test which checks the firmware version.

    This test requires a USB test image plugged in. The firmware id of
    the current running firmware must matches the system shellball's, or user
    can provide a shellball to do this test. In this way, the client will be
    update with the given shellball first. On runtime, this test modifies the
    firmware version of the shellball and runs autoupdate. Check firmware
    version after boot with firmware B, and then recover firmware A and B to
    original shellball.
    """
    version = 1
    NEEDS_SERVO_USB = True

    def check_firmware_version(self, expected_ver):
        """Checks the firmware version."""
        actual_ver = self.faft_client.bios.get_version(
                'b' if self.fw_vboot2 else 'a')
        actual_tpm_fwver = self.faft_client.tpm.get_firmware_version()
        if actual_ver != expected_ver or actual_tpm_fwver != expected_ver:
            raise error.TestFail(
                'Firmware version should be %s,'
                'but got (fwver, tpm_fwver) = (%s, %s).' %
                (expected_ver, actual_ver, actual_tpm_fwver))
        else:
            logging.info(
                'Update success, now version is %s',
                actual_ver)

    def initialize(self, host, cmdline_args):
        """Setup the test"""
        dict_args = utils.args_to_dict(cmdline_args)
        shellball_path = dict_args.get('shellball', None)
        super(firmware_UpdateFirmwareVersion, self).initialize(
            host, cmdline_args)
        self.switcher.setup_mode('normal')
        self.backup_firmware()
        self.setup_firmwareupdate_shellball(shellball_path)

        # Update firmware if needed
        if shellball_path:
            self.set_ap_write_protect_and_reboot(enable=False)
            self.faft_client.updater.run_factory_install()
            self.switcher.mode_aware_reboot()

        self.setup_usbkey(usbkey=True)

        self._fwid = self.faft_client.updater.get_section_fwid()

        self.fw_ver_tpm = self.faft_client.tpm.get_firmware_version()
        actual_ver = self.faft_client.bios.get_version('a')
        logging.info('Origin version is %s', actual_ver)
        self._update_version = actual_ver + 1
        logging.info('Firmware version will update to version %s',
                     self._update_version)

        self.faft_client.updater.resign_firmware(self._update_version)
        self.faft_client.updater.repack_shellball('test')

    def cleanup(self):
        """Cleanup after the test"""
        try:
            if self.faft_client.tpm.get_firmware_version() != self.fw_ver_tpm:
                self.reboot_and_reset_tpm()
            self.restore_firmware()
            self.invalidate_firmware_setup()
        except Exception as e:
            logging.error("Caught exception: %s", str(e))
        super(firmware_UpdateFirmwareVersion, self).cleanup()

    def run_once(self):
        """Runs a single iteration of the test."""
        logging.info("Update firmware with new version.")
        self.check_state((self.checkers.crossystem_checker, {
                          'fwid': self._fwid
                          }))
        self.check_state((self.checkers.fw_tries_checker, 'A'))
        self.faft_client.updater.run_autoupdate('test')
        self.switcher.mode_aware_reboot()

        logging.info("Copy firmware form B to A.")
        self.faft_client.updater.run_bootok('test')
        self.check_state((self.checkers.fw_tries_checker, 'B'))
        self.switcher.mode_aware_reboot()

        logging.info("Check firmware and TPM version, then recovery.")
        self.check_state((self.checkers.fw_tries_checker,
                          'B' if self.fw_vboot2 else 'A'))
        self.check_firmware_version(self._update_version)
        self.faft_client.updater.run_recovery()
        self.reboot_and_reset_tpm()

        logging.info("Check Rollback version.")
        self.check_state((self.checkers.crossystem_checker, {
                          'fwid': self._fwid
                          }))
        self.check_state((self.checkers.fw_tries_checker,
                          'B' if self.fw_vboot2 else 'A'))
        self.check_firmware_version(self._update_version - 1)