# 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,
# 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 webkitpy.tool.bot.irc_command as irc_command

from webkitpy.common.net.irc.ircbot import IRCBotDelegate
from webkitpy.common.thread.threadedmessagequeue import ThreadedMessageQueue


class _IRCThreadTearoff(object):
    def __init__(self, password, message_queue, wakeup_event):
        self._password = password
        self._message_queue = message_queue
        self._wakeup_event = wakeup_event

    # IRCBotDelegate methods

    def irc_message_received(self, message):
        self._message_queue.post(message)
        self._wakeup_event.set()

    def irc_nickname(self):
        return "sheriffbot"

    def irc_password(self):
        return self._password


class SheriffIRCBot(IRCBotDelegate):
    # FIXME: Lame.  We should have an auto-registering CommandCenter.
    commands = {
        "last-green-revision": irc_command.LastGreenRevision,
        "hi": irc_command.Hi,
    }

    def __init__(self, tool):
        self._tool = tool
        self._message_queue = ThreadedMessageQueue()

    def irc_delegate(self):
        return _IRCThreadTearoff(self._tool.irc_password, self._message_queue, self._tool.wakeup_event)

    def process_message(self, message):
        tokenized_message = message.strip().split(" ")
        if not tokenized_message:
            return
        command = self.commands.get(tokenized_message[0])
        if not command:
            self._tool.irc().post("Available commands: %s" % ", ".join(self.commands.keys()))
            return
        response = command().execute(tokenized_message[1:], self._tool)
        if response:
            self._tool.irc().post(response)

    def process_pending_messages(self):
        (messages, is_running) = self._message_queue.take_all()
        for message in messages:
            self.process_message(message)
