import re

from common import dates
from common.git import Git
from common.releasedata import ProductData, config_from_argv

"""Fetches Red Hat OpenShift versions from the documentation's git repository"""

VERSION_AND_DATE_PATTERN = re.compile(
    r"{product-title}\s(?P<version>{product-version}\.\d+|\d+\.\d+\.\d+).*\n+Issued:\s(?P<date>\d\d?\s[a-zA-Z]+\s\d{4}|\d{4}-\d\d-\d\d)$",
    re.MULTILINE,
)

config = config_from_argv()
with ProductData(config.product) as product_data:
    git = Git(config.url)
    git.setup()

    # only fetch v4+ branches, because the format was different in openshift v3
    for branch in git.list_branches("refs/heads/enterprise-[4-9]*"):
        branch_version = branch.split("-")[1]
        file_version = branch_version.replace(".", "-")
        release_notes_filename = f"release_notes/ocp-{file_version}-release-notes.adoc"
        git.checkout(branch, file_list=[release_notes_filename])

        release_notes_file = git.repo_dir / release_notes_filename
        if not release_notes_file.exists():
            continue

        with release_notes_file.open("rb") as f:
            content = f.read().decode("utf-8")
            for version, date_str in VERSION_AND_DATE_PATTERN.findall(content):
                product_data.declare_version(
                    version.replace("{product-version}", branch_version),
                    dates.parse_date(date_str),
                )