from flake8_class_newline.__version__ import __version__

new_lines_on = {}

DOUBLE_QUOTE = '"'
SINGLE_QUOTE = "'"
CLASS = 'class'
METHOD = 'def '
DECORATOR = '@'


def new_line_checker(logical_line, line_number, filename):
    if filename not in new_lines_on:
        new_lines_on[filename] = []

    if logical_line.startswith(CLASS):
        new_lines_on[filename].append(line_number + 1)

    if line_number in new_lines_on[filename]:
        # if the line is not only whitespace and not empty
        double_quotes = logical_line.strip().startswith(DOUBLE_QUOTE * 3)
        quotes = logical_line.strip().startswith(SINGLE_QUOTE * 3)

        is_method = logical_line.strip().startswith(METHOD)
        is_decorator = logical_line.strip().startswith(DECORATOR)
        is_callable = is_method or is_decorator

        not_only_space = not logical_line.isspace() and logical_line
        not_is_docstring = not (quotes or double_quotes)

        if not_only_space and not_is_docstring and is_callable:
            # this means there's something on the line
            offset = line_number, 0
            yield offset, 'CNL100 Class definition does not have a new line.'


new_line_checker.name = 'new_line_checker'
new_line_checker.version = __version__