# Copyright (C) 2016 Apple Inc. All rights reserved.
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"""Checks WebKit style for the contributors.json file."""

import difflib
import json
import re
from sets import Set
from jsonchecker import JSONChecker
from webkitpy.common.config.committers import CommitterList
from webkitpy.common.system.filesystem import FileSystem


class ContributorsChecker(JSONChecker):
    """Processes contributors.json lines"""

    def __init__(self, file_path, handle_style_error):
        super(ContributorsChecker, self).__init__(file_path, handle_style_error)
        self._file_path = file_path

    def check(self, lines):
        super(ContributorsChecker, self).check(lines)
        canonicalized = CommitterList().as_json()
        actual = FileSystem().read_text_file(self._file_path)
        diff = self._unidiff_output(actual, canonicalized)
        if diff:
            self._handle_style_error(0, 'json/syntax', 5, 'contributors.json differs from the canonical format. Use "validate-committer-lists --canonicalize" to reformat it.')
            print(diff)

    def _unidiff_output(self, expected, actual):
        expected = expected.splitlines(1)
        actual = actual.splitlines(1)
        diff = difflib.unified_diff(expected, actual)
        return ''.join(diff)