# Copyright (C) 2010 Google 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,
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

import logging
import re

from webkitpy.common.webkit_finder import WebKitFinder
from webkitpy.layout_tests.breakpad.dump_reader_multipart import DumpReaderLinux
from webkitpy.layout_tests.models import test_run_results
from webkitpy.layout_tests.port import base
from webkitpy.layout_tests.port import win
from webkitpy.layout_tests.port import config


_log = logging.getLogger(__name__)


class LinuxPort(base.Port):
    port_name = 'linux'

    SUPPORTED_VERSIONS = ('precise', 'trusty')

    FALLBACK_PATHS = {}
    FALLBACK_PATHS['trusty'] = ['linux'] + win.WinPort.latest_platform_fallback_path()
    FALLBACK_PATHS['precise'] = ['linux-precise'] + FALLBACK_PATHS['trusty']

    DEFAULT_BUILD_DIRECTORIES = ('out',)

    BUILD_REQUIREMENTS_URL = 'https://chromium.googlesource.com/chromium/src/+/master/docs/linux_build_instructions.md'
    @classmethod
    def determine_full_port_name(cls, host, options, port_name):
        if port_name.endswith('linux'):
            assert host.platform.is_linux()
            version = host.platform.os_version
            return port_name + '-' + version
        return port_name


    def __init__(self, host, port_name, **kwargs):
        super(LinuxPort, self).__init__(host, port_name, **kwargs)
        self._version = port_name[port_name.index('linux-') + len('linux-'):]
        self._architecture = "x86_64"
        assert self._version in self.SUPPORTED_VERSIONS

        if not self.get_option('disable_breakpad'):
            self._dump_reader = DumpReaderLinux(host, self._build_path())

    def additional_driver_flag(self):
        flags = super(LinuxPort, self).additional_driver_flag()
        if not self.get_option('disable_breakpad'):
            flags += ['--enable-crash-reporter', '--crash-dumps-dir=%s' % self._dump_reader.crash_dumps_directory()]
        return flags

    def check_build(self, needs_http, printer):
        result = super(LinuxPort, self).check_build(needs_http, printer)

        if result:
            _log.error('For complete Linux build requirements, please see:')
            _log.error('')
            _log.error('    https://chromium.googlesource.com/chromium/src/+/master/docs/linux_build_instructions.md')
        return result

    def look_for_new_crash_logs(self, crashed_processes, start_time):
        if self.get_option('disable_breakpad'):
            return None
        return self._dump_reader.look_for_new_crash_logs(crashed_processes, start_time)

    def clobber_old_port_specific_results(self):
        if not self.get_option('disable_breakpad'):
            self._dump_reader.clobber_old_results()

    def operating_system(self):
        return 'linux'

    def path_to_apache(self):
        # The Apache binary path can vary depending on OS and distribution
        # See http://wiki.apache.org/httpd/DistrosDefaultLayout
        for path in ["/usr/sbin/httpd", "/usr/sbin/apache2"]:
            if self._filesystem.exists(path):
                return path
        _log.error("Could not find apache. Not installed or unknown path.")
        return None

    #
    # PROTECTED METHODS
    #

    def _check_apache_install(self):
        result = self._check_file_exists(self.path_to_apache(), "apache2")
        result = self._check_file_exists(self.path_to_apache_config_file(), "apache2 config file") and result
        if not result:
            _log.error('    Please install using: "sudo apt-get install apache2 libapache2-mod-php5"')
            _log.error('')
        return result

    def _wdiff_missing_message(self):
        return 'wdiff is not installed; please install using "sudo apt-get install wdiff"'

    def _path_to_driver(self, configuration=None):
        binary_name = self.driver_name()
        return self._build_path_with_configuration(configuration, binary_name)

    def _path_to_helper(self):
        return None
