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import unittest

from webkitpy.common.net.bugzilla import Attachment
from webkitpy.common.system.outputcapture import OutputCapture
from webkitpy.common.system.executive import ScriptError
from webkitpy.thirdparty.mock import Mock
from webkitpy.tool.commands.stepsequence import StepSequenceErrorHandler
from webkitpy.tool.mocktool import MockTool


class MockQueueEngine(object):
    def __init__(self, name, queue, wakeup_event):
        pass

    def run(self):
        pass


class QueuesTest(unittest.TestCase):
    # This is _patch1 in mocktool.py
    mock_work_item = MockTool().bugs.fetch_attachment(197)

    def assert_outputs(self, func, func_name, args, expected_stdout, expected_stderr, expected_exceptions):
        exception = None
        if expected_exceptions and func_name in expected_exceptions:
            exception = expected_exceptions[func_name]

        OutputCapture().assert_outputs(self,
                func,
                args=args,
                expected_stdout=expected_stdout.get(func_name, ""),
                expected_stderr=expected_stderr.get(func_name, ""),
                expected_exception=exception)

    def _default_begin_work_queue_stderr(self, name):
        checkout_dir = '/mock-checkout'
        string_replacements = {"name": name, 'checkout_dir': checkout_dir}
        return "CAUTION: %(name)s will discard all local changes in \"%(checkout_dir)s\"\nRunning WebKit %(name)s.\nMOCK: update_status: %(name)s Starting Queue\n" % string_replacements

    def assert_queue_outputs(self, queue, args=None, work_item=None, expected_stdout=None, expected_stderr=None, expected_exceptions=None, options=None, tool=None):
        if not tool:
            tool = MockTool()
            # This is a hack to make it easy for callers to not have to setup a custom MockFileSystem just to test the commit-queue
            # the cq tries to read the layout test results, and will hit a KeyError in MockFileSystem if we don't do this.
            tool.filesystem.write_text_file('/mock-results/results.html', "")
        if not expected_stdout:
            expected_stdout = {}
        if not expected_stderr:
            expected_stderr = {}
        if not args:
            args = []
        if not options:
            options = Mock()
            options.port = None
        if not work_item:
            work_item = self.mock_work_item
        tool.user.prompt = lambda message: "yes"

        queue.execute(options, args, tool, engine=MockQueueEngine)

        self.assert_outputs(queue.queue_log_path, "queue_log_path", [], expected_stdout, expected_stderr, expected_exceptions)
        self.assert_outputs(queue.work_item_log_path, "work_item_log_path", [work_item], expected_stdout, expected_stderr, expected_exceptions)
        self.assert_outputs(queue.begin_work_queue, "begin_work_queue", [], expected_stdout, expected_stderr, expected_exceptions)
        self.assert_outputs(queue.should_continue_work_queue, "should_continue_work_queue", [], expected_stdout, expected_stderr, expected_exceptions)
        self.assert_outputs(queue.next_work_item, "next_work_item", [], expected_stdout, expected_stderr, expected_exceptions)
        self.assert_outputs(queue.should_proceed_with_work_item, "should_proceed_with_work_item", [work_item], expected_stdout, expected_stderr, expected_exceptions)
        self.assert_outputs(queue.process_work_item, "process_work_item", [work_item], expected_stdout, expected_stderr, expected_exceptions)
        self.assert_outputs(queue.handle_unexpected_error, "handle_unexpected_error", [work_item, "Mock error message"], expected_stdout, expected_stderr, expected_exceptions)
        # Should we have a different function for testing StepSequenceErrorHandlers?
        if isinstance(queue, StepSequenceErrorHandler):
            self.assert_outputs(queue.handle_script_error, "handle_script_error", [tool, {"patch": self.mock_work_item}, ScriptError(message="ScriptError error message", script_args="MockErrorCommand")], expected_stdout, expected_stderr, expected_exceptions)
