# Copyright 2020 The Tint Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Presubmit script for Tint.
See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
for more details about the presubmit API built into depot_tools.
"""

import re

USE_PYTHON3 = True


def _LicenseHeader(input_api):
    """Returns the license header regexp."""
    # Accept any year number from 2019 to the current year
    current_year = int(input_api.time.strftime('%Y'))
    allowed_years = (str(s) for s in reversed(xrange(2019, current_year + 1)))
    years_re = '(' + '|'.join(allowed_years) + ')'
    license_header = (
        r'.*? Copyright( \(c\))? %(year)s The Tint [Aa]uthors\n '
        r'.*?\n'
        r'.*? Licensed under the Apache License, Version 2.0 (the "License");\n'
        r'.*? you may not use this file except in compliance with the License.\n'
        r'.*? You may obtain a copy of the License at\n'
        r'.*?\n'
        r'.*?     http://www.apache.org/licenses/LICENSE-2.0\n'
        r'.*?\n'
        r'.*? Unless required by applicable law or agreed to in writing, software\n'
        r'.*? distributed under the License is distributed on an "AS IS" BASIS,\n'
        r'.*? WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n'
        r'.*? See the License for the specific language governing permissions and\n'
        r'.*? limitations under the License.\n') % {
            'year': years_re,
        }
    return license_header


REGEXES = [
    r"(?i)black[-_]?list",
    r"(?i)white[-_]?list",
    r"(?i)gr[ea]y[-_]?list",
    r"(?i)(first class citizen)",
    r"(?i)black[-_]?hat",
    r"(?i)white[-_]?hat",
    r"(?i)gr[ea]y[-_]?hat",
    r"(?i)master",
    r"(?i)slave",
    r"(?i)\bhim\b",
    r"(?i)\bhis\b",
    r"(?i)\bshe\b",
    r"(?i)\bher\b",
    r"(?i)\bguys\b",
    r"(?i)\bhers\b",
    r"(?i)\bman\b",
    r"(?i)\bwoman\b",
    r"(?i)\she\s",
    r"(?i)\she$",
    r"(?i)^he\s",
    r"(?i)^he$",
    r"(?i)\she['|\u2019]d\s",
    r"(?i)\she['|\u2019]d$",
    r"(?i)^he['|\u2019]d\s",
    r"(?i)^he['|\u2019]d$",
    r"(?i)\she['|\u2019]s\s",
    r"(?i)\she['|\u2019]s$",
    r"(?i)^he['|\u2019]s\s",
    r"(?i)^he['|\u2019]s$",
    r"(?i)\she['|\u2019]ll\s",
    r"(?i)\she['|\u2019]ll$",
    r"(?i)^he['|\u2019]ll\s",
    r"(?i)^he['|\u2019]ll$",
    r"(?i)grandfather",
    r"(?i)\bmitm\b",
    r"(?i)\bcrazy\b",
    r"(?i)\binsane\b",
    r"(?i)\bblind\sto\b",
    r"(?i)\bflying\sblind\b",
    r"(?i)\bblind\seye\b",
    r"(?i)\bcripple\b",
    r"(?i)\bcrippled\b",
    r"(?i)\bdumb\b",
    r"(?i)\bdummy\b",
    r"(?i)\bparanoid\b",
    r"(?i)\bsane\b",
    r"(?i)\bsanity\b",
    r"(?i)red[-_]?line",
]

REGEX_LIST = []
for reg in REGEXES:
    REGEX_LIST.append(re.compile(reg))

def CheckNonInclusiveLanguage(input_api, output_api, source_file_filter=None):
    """Checks the files for non-inclusive language."""

    matches = []
    for f in input_api.AffectedFiles(include_deletes=False,
                                     file_filter=source_file_filter):
        for line_num, line in f.ChangedContents():
            for reg in REGEX_LIST:
                match = reg.search(line)
                if match:
                    matches.append(
                        "{} ({}): found non-inclusive language: {}".format(
                            f.LocalPath(), line_num, match.group(0)))

    if len(matches):
        return [
            output_api.PresubmitPromptWarning('Non-inclusive language found:',
                                              items=matches)
        ]

    return []


def CheckChange(input_api, output_api):
    results = []

    results += input_api.canned_checks.CheckChangeHasDescription(
        input_api, output_api)
    results += input_api.canned_checks.CheckPatchFormatted(input_api,
                                                           output_api,
                                                           check_python=True)
    results += input_api.canned_checks.CheckGNFormatted(input_api, output_api)
    results += input_api.canned_checks.CheckChangeHasNoCrAndHasOnlyOneEol(
        input_api, output_api)
    results += input_api.canned_checks.CheckChangeHasNoTabs(
        input_api, output_api)
    results += input_api.canned_checks.CheckChangeTodoHasOwner(
        input_api, output_api)
    results += input_api.canned_checks.CheckChangeHasNoStrayWhitespace(
        input_api, output_api)
    results += input_api.canned_checks.CheckDoNotSubmit(input_api, output_api)
    results += input_api.canned_checks.CheckChangeLintsClean(input_api,
                                                             output_api,
                                                             lint_filters="")

    def NonInclusiveFileFilter(file):
        filter_list = [
            "docs/tint/spirv-input-output-variables.md",  # External URL
            "test/tint/samples/compute_boids.wgsl ",  # External URL
        ]
        return file in filter_list

    results += CheckNonInclusiveLanguage(input_api, output_api,
                                         NonInclusiveFileFilter)

    return results


def CheckChangeOnUpload(input_api, output_api):
    return CheckChange(input_api, output_api)


def CheckChangeOnCommit(input_api, output_api):
    return CheckChange(input_api, output_api)