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"""Checks WebKit style for test_expectations files."""

import logging

from webkitpy.common.host import Host
from webkitpy.layout_tests.models.test_expectations import TestExpectationParser
from webkitpy.style.checkers.common import TabChecker


class TestExpectationsChecker(object):
    """Processes TestExpectations lines for validating the syntax."""

    categories = set(['test/expectations'])

    def __init__(self, file_path, handle_style_error, host=None):
        self._file_path = file_path
        self._handle_style_error = handle_style_error
        self._tab_checker = TabChecker(file_path, handle_style_error)

        # FIXME: host should be a required parameter, not an optional one.
        host = host or Host()

        self._port_obj = host.port_factory.get()

        # Suppress error messages of test_expectations module since they will be reported later.
        log = logging.getLogger('webkitpy.layout_tests.layout_package.test_expectations')
        log.setLevel(logging.CRITICAL)

    def _handle_error_message(self, lineno, message, confidence):
        pass

    def check_test_expectations(self, expectations_str, tests=None):
        parser = TestExpectationParser(self._port_obj, tests, is_lint_mode=True)
        expectations = parser.parse('expectations', expectations_str)

        level = 5
        for expectation_line in expectations:
            for warning in expectation_line.warnings:
                self._handle_style_error(expectation_line.line_numbers, 'test/expectations', level, warning)

    def check_tabs(self, lines):
        self._tab_checker.check(lines)

    def check(self, lines):
        expectations = '\n'.join(lines)
        if self._port_obj:
            self.check_test_expectations(expectations_str=expectations, tests=None)

        # Warn tabs in lines as well
        self.check_tabs(lines)