#!/usr/bin/env python3

# Copyright 2016 gRPC 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.

import os
import re
import subprocess
import sys

import yaml

errors = 0

os.chdir(os.path.join(os.path.dirname(sys.argv[0]), "../../.."))

# hack import paths to pick up extra code
sys.path.insert(0, os.path.abspath("tools/buildgen/plugins"))
from expand_version import Version

try:
    branch_name = subprocess.check_output(
        "git rev-parse --abbrev-ref HEAD", shell=True
    ).decode()
except:
    print("WARNING: not a git repository")
    branch_name = None

if branch_name is not None:
    m = re.match(r"^release-([0-9]+)_([0-9]+)$", branch_name)
    if m:
        print("RELEASE branch")
        # version number should align with the branched version
        check_version = lambda version: (
            version.major == int(m.group(1))
            and version.minor == int(m.group(2))
        )
        warning = (
            'Version key "%%s" value "%%s" should have a major version %s and'
            " minor version %s" % (m.group(1), m.group(2))
        )
    elif re.match(r"^debian/.*$", branch_name):
        # no additional version checks for debian branches
        check_version = lambda version: True
    else:
        # all other branches should have a -dev tag
        check_version = lambda version: version.tag == "dev"
        warning = 'Version key "%s" value "%s" should have a -dev tag'
else:
    check_version = lambda version: True

with open("build_handwritten.yaml", "r") as f:
    build_yaml = yaml.safe_load(f.read())

settings = build_yaml["settings"]

top_version = Version(settings["version"])
if not check_version(top_version):
    errors += 1
    print((warning % ("version", top_version)))

for tag, value in list(settings.items()):
    if re.match(r"^[a-z]+_version$", tag):
        value = Version(value)
        if tag != "core_version":
            if value.major != top_version.major:
                errors += 1
                print(
                    "major version mismatch on %s: %d vs %d"
                    % (tag, value.major, top_version.major)
                )
            if value.minor != top_version.minor:
                errors += 1
                print(
                    "minor version mismatch on %s: %d vs %d"
                    % (tag, value.minor, top_version.minor)
                )
        if not check_version(value):
            errors += 1
            print((warning % (tag, value)))

sys.exit(errors)