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import random
import unittest

from webkitpy.common.system.outputcapture import OutputCapture
from webkitpy.tool.bot import irc_command
from webkitpy.tool.bot.queueengine import TerminateQueue
from webkitpy.tool.bot.sheriff import Sheriff
from webkitpy.tool.bot.ircbot import IRCBot
from webkitpy.tool.bot.ircbot import UnknownCommand
from webkitpy.tool.bot.sheriff_unittest import MockSheriffBot
from webkitpy.tool.mocktool import MockTool


def run(message):
    tool = MockTool()
    tool.ensure_irc_connected(None)
    bot = IRCBot("sheriffbot", tool, Sheriff(tool, MockSheriffBot()), irc_command.commands)
    bot._message_queue.post(["mock_nick", message])
    bot.process_pending_messages()


class IRCBotTest(unittest.TestCase):
    def test_parse_command_and_args(self):
        tool = MockTool()
        bot = IRCBot("sheriffbot", tool, Sheriff(tool, MockSheriffBot()), irc_command.commands)
        self.assertEqual(bot._parse_command_and_args(""), (UnknownCommand, [""]))
        self.assertEqual(bot._parse_command_and_args("   "), (UnknownCommand, [""]))
        self.assertEqual(bot._parse_command_and_args(" hi "), (irc_command.Hi, []))
        self.assertEqual(bot._parse_command_and_args(" hi there "), (irc_command.Hi, ["there"]))

    def test_exception_during_command(self):
        tool = MockTool()
        tool.ensure_irc_connected(None)
        bot = IRCBot("sheriffbot", tool, Sheriff(tool, MockSheriffBot()), irc_command.commands)

        class CommandWithException(object):
            def execute(self, nick, args, tool, sheriff):
                raise Exception("mock_exception")

        bot._parse_command_and_args = lambda request: (CommandWithException, [])
        expected_logs = 'MOCK: irc.post: Exception executing command: mock_exception\n'
        OutputCapture().assert_outputs(self, bot.process_message, args=["mock_nick", "ignored message"], expected_logs=expected_logs)


        class CommandWithException(object):
            def execute(self, nick, args, tool, sheriff):
                raise KeyboardInterrupt()

        bot._parse_command_and_args = lambda request: (CommandWithException, [])
        # KeyboardInterrupt and SystemExit are not subclasses of Exception and thus correctly will not be caught.
        OutputCapture().assert_outputs(self, bot.process_message, args=["mock_nick", "ignored message"], expected_exception=KeyboardInterrupt)

    def test_hi(self):
        random.seed(23324)
        expected_logs = 'MOCK: irc.post: "Only you can prevent forest fires." -- Smokey the Bear\n'
        OutputCapture().assert_outputs(self, run, args=["hi"], expected_logs=expected_logs)

    def test_help(self):
        expected_logs = 'MOCK: irc.post: mock_nick: Available commands: create-bug, help, hi, ping, restart, revert, whois, yt?\nMOCK: irc.post: mock_nick: Type "mock-sheriff-bot: help COMMAND" for help on my individual commands.\n'
        OutputCapture().assert_outputs(self, run, args=["help"], expected_logs=expected_logs)
        expected_logs = 'MOCK: irc.post: mock_nick: Usage: hi\nMOCK: irc.post: mock_nick: Responds with hi.\nMOCK: irc.post: mock_nick: Aliases: hello\n'
        OutputCapture().assert_outputs(self, run, args=["help hi"], expected_logs=expected_logs)
        OutputCapture().assert_outputs(self, run, args=["help hello"], expected_logs=expected_logs)

    def test_restart(self):
        expected_logs = "MOCK: irc.post: Restarting...\n"
        OutputCapture().assert_outputs(self, run, args=["restart"], expected_logs=expected_logs, expected_exception=TerminateQueue)

    def test_rollout(self):
        expected_logs = "MOCK: irc.post: mock_nick: Preparing revert for https://trac.webkit.org/changeset/21654 ...\nMOCK: irc.post: mock_nick, abarth, ap, darin: Created a revert patch: http://example.com/36936\n"
        OutputCapture().assert_outputs(self, run, args=["rollout 21654 This patch broke the world"], expected_logs=expected_logs)

    def test_revert(self):
        expected_logs = "MOCK: irc.post: mock_nick: Preparing revert for https://trac.webkit.org/changeset/21654 ...\nMOCK: irc.post: mock_nick, abarth, ap, darin: Created a revert patch: http://example.com/36936\n"
        OutputCapture().assert_outputs(self, run, args=["revert 21654 This patch broke the world"], expected_logs=expected_logs)

    def test_multi_revert(self):
        expected_logs = "MOCK: irc.post: mock_nick: Preparing revert for https://trac.webkit.org/changeset/21654, https://trac.webkit.org/changeset/21655, and https://trac.webkit.org/changeset/21656 ...\nMOCK: irc.post: mock_nick, abarth, ap, darin: Created a revert patch: http://example.com/36936\n"
        OutputCapture().assert_outputs(self, run, args=["revert 21654 21655 21656 This 21654 patch broke the world"], expected_logs=expected_logs)

    def test_revert_with_r_in_svn_revision(self):
        expected_logs = "MOCK: irc.post: mock_nick: Preparing revert for https://trac.webkit.org/changeset/21654 ...\nMOCK: irc.post: mock_nick, abarth, ap, darin: Created a revert patch: http://example.com/36936\n"
        OutputCapture().assert_outputs(self, run, args=["revert r21654 This patch broke the world"], expected_logs=expected_logs)

    def test_multi_revert_with_r_in_svn_revision(self):
        expected_logs = "MOCK: irc.post: mock_nick: Preparing revert for https://trac.webkit.org/changeset/21654, https://trac.webkit.org/changeset/21655, and https://trac.webkit.org/changeset/21656 ...\nMOCK: irc.post: mock_nick, abarth, ap, darin: Created a revert patch: http://example.com/36936\n"
        OutputCapture().assert_outputs(self, run, args=["revert r21654 21655 r21656 This r21654 patch broke the world"], expected_logs=expected_logs)

    def test_revert_bananas(self):
        expected_logs = "MOCK: irc.post: mock_nick: Usage: revert SVN_REVISION [SVN_REVISIONS] REASON\n"
        OutputCapture().assert_outputs(self, run, args=["revert bananas"], expected_logs=expected_logs)

    def test_revert_invalidate_revision(self):
        # When folks pass junk arguments, we should just spit the usage back at them.
        expected_logs = "MOCK: irc.post: mock_nick: Usage: revert SVN_REVISION [SVN_REVISIONS] REASON\n"
        OutputCapture().assert_outputs(self, run,
                                       args=["revert --component=Tools 21654"],
                                       expected_logs=expected_logs)

    def test_revert_invalidate_reason(self):
        # FIXME: I'm slightly confused as to why this doesn't return the USAGE message.
        expected_logs = """MOCK: irc.post: mock_nick: Preparing revert for https://trac.webkit.org/changeset/21654 ...
MOCK: irc.post: mock_nick, abarth, ap, darin: Failed to create revert patch:
MOCK: irc.post: The revert reason may not begin with - (\"-bad (Requested by mock_nick on #webkit).\").
"""
        OutputCapture().assert_outputs(self, run,
                                       args=["revert 21654 -bad"],
                                       expected_logs=expected_logs)

    def test_multi_revert_invalidate_reason(self):
        expected_logs = """MOCK: irc.post: mock_nick: Preparing revert for https://trac.webkit.org/changeset/21654, https://trac.webkit.org/changeset/21655, and https://trac.webkit.org/changeset/21656 ...
MOCK: irc.post: mock_nick, abarth, ap, darin: Failed to create revert patch:
MOCK: irc.post: The revert reason may not begin with - (\"-bad (Requested by mock_nick on #webkit).\").
"""
        OutputCapture().assert_outputs(self, run,
                                       args=["revert "
                                             "21654 21655 r21656 -bad"],
                                       expected_logs=expected_logs)

    def test_revert_no_reason(self):
        expected_logs = "MOCK: irc.post: mock_nick: Usage: revert SVN_REVISION [SVN_REVISIONS] REASON\n"
        OutputCapture().assert_outputs(self, run, args=["revert 21654"], expected_logs=expected_logs)

    def test_multi_revert_no_reason(self):
        expected_logs = "MOCK: irc.post: mock_nick: Usage: revert SVN_REVISION [SVN_REVISIONS] REASON\n"
        OutputCapture().assert_outputs(self, run, args=["revert 21654 21655 r21656"], expected_logs=expected_logs)