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"""WebKit Gtk implementation of the Port interface."""

import logging
import os
import signal

from webkitpy.layout_tests.port.webkit import WebKitPort

_log = logging.getLogger("webkitpy.layout_tests.port.gtk")


class GtkPort(WebKitPort):
    """WebKit Gtk implementation of the Port class."""

    def __init__(self, **kwargs):
        kwargs.setdefault('port_name', 'gtk')
        WebKitPort.__init__(self, **kwargs)

    def _tests_for_other_platforms(self):
        # FIXME: This list could be dynamic based on platform name and
        # pushed into base.Port.
        # This really need to be automated.
        return [
            "platform/chromium",
            "platform/win",
            "platform/qt",
            "platform/mac",
        ]

    def _path_to_apache_config_file(self):
        # FIXME: This needs to detect the distribution and change config files.
        return self._filesystem.join(self.layout_tests_dir(), 'http', 'conf',
                                     'apache2-debian-httpd.conf')

    def _shut_down_http_server(self, server_pid):
        """Shut down the httpd web server. Blocks until it's fully
        shut down.

        Args:
            server_pid: The process ID of the running server.
        """
        # server_pid is not set when "http_server.py stop" is run manually.
        if server_pid is None:
            # FIXME: This isn't ideal, since it could conflict with
            # lighttpd processes not started by http_server.py,
            # but good enough for now.
            self._executive.kill_all('apache2')
        else:
            try:
                os.kill(server_pid, signal.SIGTERM)
                # TODO(mmoss) Maybe throw in a SIGKILL just to be sure?
            except OSError:
                # Sometimes we get a bad PID (e.g. from a stale httpd.pid
                # file), so if kill fails on the given PID, just try to
                # 'killall' web servers.
                self._shut_down_http_server(None)

    def _path_to_driver(self):
        return self._build_path('Programs', 'DumpRenderTree')

    def check_build(self, needs_http):
        if not self._check_driver():
            return False
        return True

    def _path_to_apache(self):
        if self._is_redhat_based():
            return '/usr/sbin/httpd'
        else:
            return '/usr/sbin/apache2'

    def _path_to_apache_config_file(self):
        if self._is_redhat_based():
            config_name = 'fedora-httpd.conf'
        else:
            config_name = 'apache2-debian-httpd.conf'

        return self._filesystem.join(self.layout_tests_dir(), 'http', 'conf',
                            config_name)

    def _path_to_wdiff(self):
        if self._is_redhat_based():
            return '/usr/bin/dwdiff'
        else:
            return '/usr/bin/wdiff'

    def _is_redhat_based(self):
        return self._filesystem.exists(self._filesystem.join('/etc', 'redhat-release'))