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import optparse
import unittest

from webkitpy.common.system.output_capture import OutputCapture
from webkitpy.tool.commands.command import Command


class TrivialCommand(Command):
    name = "trivial"
    help_text = "help text"
    long_help = "trivial command long help text"
    show_in_main_help = True

    def __init__(self, **kwargs):
        super(TrivialCommand, self).__init__(**kwargs)

    def execute(self, options, args, tool):
        pass


class DummyTool(object):
    def name(self):
        return "dummy-tool"


class CommandTest(unittest.TestCase):

    def test_name_with_arguments_with_two_args(self):
        class TrivialCommandWithArgs(TrivialCommand):
            argument_names = "ARG1 ARG2"
        command = TrivialCommandWithArgs()
        self.assertEqual(command.name_with_arguments(), "trivial ARG1 ARG2")

    def test_name_with_arguments_with_options(self):
        command = TrivialCommand(options=[optparse.make_option("--my_option")])
        self.assertEqual(command.name_with_arguments(), "trivial [options]")

    def test_parse_required_arguments(self):
        self.assertEqual(Command._parse_required_arguments("ARG1 ARG2"), ["ARG1", "ARG2"])
        self.assertEqual(Command._parse_required_arguments("[ARG1] [ARG2]"), [])
        self.assertEqual(Command._parse_required_arguments("[ARG1] ARG2"), ["ARG2"])
        # Note: We might make our arg parsing smarter in the future and allow this type of arguments string.
        self.assertRaises(Exception, Command._parse_required_arguments, "[ARG1 ARG2]")

    def test_required_arguments(self):
        class TrivialCommandWithRequiredAndOptionalArgs(TrivialCommand):
            argument_names = "ARG1 ARG2 [ARG3]"
        two_required_arguments = TrivialCommandWithRequiredAndOptionalArgs()
        expected_logs = ("2 arguments required, 1 argument provided.  Provided: 'foo'  Required: ARG1 ARG2\n"
                         "See 'dummy-tool help trivial' for usage.\n")
        exit_code = OutputCapture().assert_outputs(self, two_required_arguments.check_arguments_and_execute,
                                                   [None, ["foo"], DummyTool()], expected_logs=expected_logs)
        self.assertEqual(exit_code, 1)