# Copyright (C) 2010 Google Inc. All rights reserved.
# Copyright (C) 2010 Gabor Rapcsanyi (rgabor@inf.u-szeged.hu), University of Szeged
# Copyright (C) 2011 Apple Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
#     * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

import logging
import optparse
import os
import signal
import sys
import traceback

from webkitpy.common.host import Host
from webkitpy.layout_tests.controllers.manager import Manager
from webkitpy.layout_tests.port import configuration_options, platform_options
from webkitpy.layout_tests.views import buildbot_results
from webkitpy.layout_tests.views import printing


_log = logging.getLogger(__name__)


# This mirrors what the shell normally does.
INTERRUPTED_EXIT_STATUS = signal.SIGINT + 128

# This is a randomly chosen exit code that can be tested against to
# indicate that an unexpected exception occurred.
EXCEPTIONAL_EXIT_STATUS = 254


def main(argv, stdout, stderr):
    options, args = parse_args(argv)

    if options.platform and 'test' in options.platform:
        # It's a bit lame to import mocks into real code, but this allows the user
        # to run tests against the test platform interactively, which is useful for
        # debugging test failures.
        from webkitpy.common.host_mock import MockHost
        host = MockHost()
    else:
        host = Host()

    if options.lint_test_files:
        from webkitpy.layout_tests.lint_test_expectations import lint
        return lint(host, options, stderr)

    try:
        port = host.port_factory.get(options.platform, options)
    except NotImplementedError, e:
        # FIXME: is this the best way to handle unsupported port names?
        print >> stderr, str(e)
        return EXCEPTIONAL_EXIT_STATUS

    try:
        run_details = run(port, options, args, stderr)
        if run_details.exit_code != -1:
            bot_printer = buildbot_results.BuildBotPrinter(stdout, options.debug_rwt_logging)
            bot_printer.print_results(run_details)

        return run_details.exit_code
    except KeyboardInterrupt:
        return INTERRUPTED_EXIT_STATUS
    except BaseException as e:
        if isinstance(e, Exception):
            print >> stderr, '\n%s raised: %s' % (e.__class__.__name__, str(e))
            traceback.print_exc(file=stderr)
        return EXCEPTIONAL_EXIT_STATUS


def parse_args(args):
    option_group_definitions = []

    option_group_definitions.append(("Platform options", platform_options()))
    option_group_definitions.append(("Configuration options", configuration_options()))
    option_group_definitions.append(("Printing Options", printing.print_options()))

    # FIXME: These options should move onto the ChromiumPort.
    option_group_definitions.append(("Chromium-specific Options", [
        optparse.make_option("--nocheck-sys-deps", action="store_true",
            default=False,
            help="Don't check the system dependencies (themes)"),
        optparse.make_option("--adb-device",
            action="append", default=[],
            help="Run Android layout tests on these devices."),
    ]))

    option_group_definitions.append(("Results Options", [
        optparse.make_option("-p", "--pixel", "--pixel-tests", action="store_true",
            dest="pixel_tests", help="Enable pixel-to-pixel PNG comparisons"),
        optparse.make_option("--no-pixel", "--no-pixel-tests", action="store_false",
            dest="pixel_tests", help="Disable pixel-to-pixel PNG comparisons"),
        optparse.make_option("--results-directory", help="Location of test results"),
        optparse.make_option("--build-directory",
            help="Path to the directory under which build files are kept (should not include configuration)"),
        optparse.make_option("--add-platform-exceptions", action="store_true", default=False,
            help="Save generated results into the *most-specific-platform* directory rather than the *generic-platform* directory"),
        optparse.make_option("--new-baseline", action="store_true",
            default=False, help="Save generated results as new baselines "
                 "into the *most-specific-platform* directory, overwriting whatever's "
                 "already there. Equivalent to --reset-results --add-platform-exceptions"),
        optparse.make_option("--reset-results", action="store_true",
            default=False, help="Reset expectations to the "
                 "generated results in their existing location."),
        optparse.make_option("--no-new-test-results", action="store_false",
            dest="new_test_results", default=True,
            help="Don't create new baselines when no expected results exist"),

        #FIXME: we should support a comma separated list with --pixel-test-directory as well.
        optparse.make_option("--pixel-test-directory", action="append", default=[], dest="pixel_test_directories",
            help="A directory where it is allowed to execute tests as pixel tests. "
                 "Specify multiple times to add multiple directories. "
                 "This option implies --pixel-tests. If specified, only those tests "
                 "will be executed as pixel tests that are located in one of the "
                 "directories enumerated with the option. Some ports may ignore this "
                 "option while others can have a default value that can be overridden here."),

        optparse.make_option("--skip-failing-tests", action="store_true",
            default=False, help="Skip tests that are expected to fail. "
                 "Note: When using this option, you might miss new crashes "
                 "in these tests."),
        optparse.make_option("--additional-drt-flag", action="append",
            default=[], help="Additional command line flag to pass to the driver "
                 "Specify multiple times to add multiple flags."),
        optparse.make_option("--driver-name", type="string",
            help="Alternative driver binary to use"),
        optparse.make_option("--additional-platform-directory", action="append",
            default=[], help="Additional directory where to look for test "
                 "baselines (will take precendence over platform baselines). "
                 "Specify multiple times to add multiple search path entries."),
        optparse.make_option("--additional-expectations", action="append", default=[],
            help="Path to a test_expectations file that will override previous expectations. "
                 "Specify multiple times for multiple sets of overrides."),
        optparse.make_option("--compare-port", action="store", default=None,
            help="Use the specified port's baselines first"),
        optparse.make_option("--no-show-results", action="store_false",
            default=True, dest="show_results",
            help="Don't launch a browser with results after the tests "
                 "are done"),
        optparse.make_option("--full-results-html", action="store_true",
            default=False,
            help="Show all failures in results.html, rather than only regressions"),
        optparse.make_option("--clobber-old-results", action="store_true",
            default=False, help="Clobbers test results from previous runs."),
    ]))

    option_group_definitions.append(("Testing Options", [
        optparse.make_option("--build", dest="build",
            action="store_true", default=True,
            help="Check to ensure the build is up-to-date (default)."),
        optparse.make_option("--no-build", dest="build",
            action="store_false", help="Don't check to see if the build is up-to-date."),
        optparse.make_option("-n", "--dry-run", action="store_true",
            default=False,
            help="Do everything but actually run the tests or upload results."),
        optparse.make_option("--wrapper",
            help="wrapper command to insert before invocations of "
                 "the driver; option is split on whitespace before "
                 "running. (Example: --wrapper='valgrind --smc-check=all')"),
        optparse.make_option("-i", "--ignore-tests", action="append", default=[],
            help="directories or test to ignore (may specify multiple times)"),
        optparse.make_option("--ignore-flaky-tests", action="store",
            help=("Control whether tests that are flaky on the bots get ignored."
                "'very-flaky' == Ignore any tests that flaked more than once on the bot."
                "'maybe-flaky' == Ignore any tests that flaked once on the bot."
                "'unexpected' == Ignore any tests that had unexpected results on the bot.")),
        optparse.make_option("--ignore-builder-category", action="store",
            help=("The category of builders to use with the --ignore-flaky-tests "
                "option ('layout' or 'deps').")),
        optparse.make_option("--test-list", action="append",
            help="read list of tests to run from file", metavar="FILE"),
        optparse.make_option("--skipped", action="store", default="default",
            help=("control how tests marked SKIP are run. "
                 "'default' == Skip tests unless explicitly listed on the command line, "
                 "'ignore' == Run them anyway, "
                 "'only' == only run the SKIP tests, "
                 "'always' == always skip, even if listed on the command line.")),
        optparse.make_option("--time-out-ms",
            help="Set the timeout for each test"),
        optparse.make_option("--order", action="store", default="natural",
            help=("determine the order in which the test cases will be run. "
                  "'none' == use the order in which the tests were listed either in arguments or test list, "
                  "'natural' == use the natural order (default), "
                  "'random-seeded' == randomize the test order using a fixed seed, "
                  "'random' == randomize the test order.")),
        optparse.make_option("--run-chunk",
            help=("Run a specified chunk (n:l), the nth of len l, "
                 "of the layout tests")),
        optparse.make_option("--run-part", help=("Run a specified part (n:m), "
                  "the nth of m parts, of the layout tests")),
        optparse.make_option("--batch-size",
            help=("Run a the tests in batches (n), after every n tests, "
                  "the driver is relaunched."), type="int", default=None),
        optparse.make_option("--run-singly", action="store_true",
            default=False, help="run a separate driver for each test (implies --verbose)"),
        optparse.make_option("--child-processes",
            help="Number of drivers to run in parallel."),
        # FIXME: Display default number of child processes that will run.
        optparse.make_option("-f", "--fully-parallel", action="store_true",
            help="run all tests in parallel"),
        optparse.make_option("--exit-after-n-failures", type="int", default=None,
            help="Exit after the first N failures instead of running all "
            "tests"),
        optparse.make_option("--exit-after-n-crashes-or-timeouts", type="int",
            default=None, help="Exit after the first N crashes instead of "
            "running all tests"),
        optparse.make_option("--iterations", type="int", default=1, help="Number of times to run the set of tests (e.g. ABCABCABC)"),
        optparse.make_option("--repeat-each", type="int", default=1, help="Number of times to run each test (e.g. AAABBBCCC)"),
        optparse.make_option("--retry-failures", action="store_true",
            help="Re-try any tests that produce unexpected results. Default is to not retry if an explicit list of tests is passed to run-webkit-tests."),
        optparse.make_option("--no-retry-failures", action="store_false",
            dest="retry_failures",
            help="Don't re-try any tests that produce unexpected results."),
        optparse.make_option("--retry-crashes", action="store_true",
            default=False,
            help="Do also retry crashes if retry-failures is enabled."),
        optparse.make_option("--max-locked-shards", type="int", default=0,
            help="Set the maximum number of locked shards"),
        optparse.make_option("--additional-env-var", type="string", action="append", default=[],
            help="Passes that environment variable to the tests (--additional-env-var=NAME=VALUE)"),
        optparse.make_option("--profile", action="store_true",
            help="Output per-test profile information."),
        optparse.make_option("--profiler", action="store",
            help="Output per-test profile information, using the specified profiler."),
    ]))

    option_group_definitions.append(("Miscellaneous Options", [
        optparse.make_option("--lint-test-files", action="store_true",
        default=False, help=("Makes sure the test files parse for all "
                            "configurations. Does not run any tests.")),
    ]))

    # FIXME: Move these into json_results_generator.py
    option_group_definitions.append(("Result JSON Options", [
        optparse.make_option("--master-name", help="The name of the buildbot master."),
        optparse.make_option("--builder-name", default="",
            help=("The name of the builder shown on the waterfall running "
                  "this script e.g. WebKit.")),
        optparse.make_option("--build-name", default="DUMMY_BUILD_NAME",
            help=("The name of the builder used in its path, e.g. "
                  "webkit-rel.")),
        optparse.make_option("--build-number", default="DUMMY_BUILD_NUMBER",
            help=("The build number of the builder running this script.")),
        optparse.make_option("--test-results-server", default="",
            help=("If specified, upload results json files to this appengine "
                  "server.")),
    ]))

    option_parser = optparse.OptionParser()

    for group_name, group_options in option_group_definitions:
        option_group = optparse.OptionGroup(option_parser, group_name)
        option_group.add_options(group_options)
        option_parser.add_option_group(option_group)

    return option_parser.parse_args(args)


def _set_up_derived_options(port, options):
    """Sets the options values that depend on other options values."""
    if not options.child_processes:
        options.child_processes = os.environ.get("WEBKIT_TEST_CHILD_PROCESSES",
                                                 str(port.default_child_processes()))
    if not options.max_locked_shards:
        options.max_locked_shards = int(os.environ.get("WEBKIT_TEST_MAX_LOCKED_SHARDS",
                                                       str(port.default_max_locked_shards())))

    if not options.configuration:
        options.configuration = port.default_configuration()

    if options.pixel_tests is None:
        options.pixel_tests = port.default_pixel_tests()

    if not options.time_out_ms:
        options.time_out_ms = str(port.default_timeout_ms())

    options.slow_time_out_ms = str(5 * int(options.time_out_ms))

    if options.additional_platform_directory:
        additional_platform_directories = []
        for path in options.additional_platform_directory:
            additional_platform_directories.append(port.host.filesystem.abspath(path))
        options.additional_platform_directory = additional_platform_directories

    if options.new_baseline:
        options.reset_results = True
        options.add_platform_exceptions = True

    if options.pixel_test_directories:
        options.pixel_tests = True
        varified_dirs = set()
        pixel_test_directories = options.pixel_test_directories
        for directory in pixel_test_directories:
            # FIXME: we should support specifying the directories all the ways we support it for additional
            # arguments specifying which tests and directories to run. We should also move the logic for that
            # to Port.
            filesystem = port.host.filesystem
            if not filesystem.isdir(filesystem.join(port.layout_tests_dir(), directory)):
                _log.warning("'%s' was passed to --pixel-test-directories, which doesn't seem to be a directory" % str(directory))
            else:
                varified_dirs.add(directory)

        options.pixel_test_directories = list(varified_dirs)

    if options.run_singly:
        options.verbose = True


def run(port, options, args, logging_stream):
    logger = logging.getLogger()
    logger.setLevel(logging.DEBUG if options.debug_rwt_logging else logging.INFO)

    try:
        printer = printing.Printer(port, options, logging_stream, logger=logger)

        _set_up_derived_options(port, options)
        manager = Manager(port, options, printer)
        printer.print_config(port.results_directory())

        run_details = manager.run(args)
        _log.debug("Testing completed, Exit status: %d" % run_details.exit_code)
        return run_details
    finally:
        printer.cleanup()

if __name__ == '__main__':
    sys.exit(main(sys.argv[1:], sys.stdout, sys.stderr))