# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
from __future__ import absolute_import

import re


class PerfDocLogger(object):
    '''
    Logger for the PerfDoc tooling. Handles the warnings by outputting
    them into through the StructuredLogger provided by lint.
    '''
    PATHS = []
    LOGGER = None
    FAILED = False

    def __init__(self):
        '''Initializes the PerfDocLogger.'''

        # Set up class attributes for all logger instances
        if not PerfDocLogger.LOGGER:
            raise Exception(
                "Missing linting LOGGER instance for PerfDocLogger initialization"
            )
        if not PerfDocLogger.PATHS:
            raise Exception(
                "Missing PATHS for PerfDocLogger initialization"
            )
        self.logger = PerfDocLogger.LOGGER

    def log(self, msg):
        '''
        Log an info message.

        :param str msg: Message to log.
        '''
        self.logger.info(msg)

    def warning(self, msg, files):
        '''
        Logs a validation warning message. The warning message is
        used as the error message that is output in the reviewbot.

        :param str msg: Message to log, it's also used as the error message
            for the issue that is output by the reviewbot.
        :param list/str files: The file(s) that this warning is about.
        '''
        if type(files) != list:
            files = [files]

        # Add a reviewbot error for each file that is given
        for file in files:
            # Get a relative path (reviewbot can't handle absolute paths)
            # TODO: Expand to outside of the testing directory
            fpath = re.sub(".*testing", "testing", file)

            # Filter out any issues that do not relate to the paths
            # that are being linted
            for path in PerfDocLogger.PATHS:
                if path not in file:
                    continue

                # Output error entry
                self.logger.lint_error(
                    message=msg,
                    lineno=0,
                    column=None,
                    path=fpath,
                    linter='perfdocs',
                    rule="Flawless performance docs."
                )

                PerfDocLogger.FAILED = True
                break

    def critical(self, msg):
        '''
        Log a critical message.

        :param str msg: Message to log.
        '''
        self.logger.critical(msg)