import pathlib
import subprocess
from common import endoflife
from hashlib import sha1
from os.path import exists
from subprocess import call

"""Fetch Debian versions with their dates from www.debian.org source repository.
"""

PRODUCT = "debian"
REPO_URL = "https://salsa.debian.org/webmaster-team/webwml.git"
REPO_SHA1 = sha1(REPO_URL.encode()).hexdigest()
REPO_DIR = pathlib.Path(f"~/.cache/git/debian.md_{REPO_SHA1}").expanduser()


# Checkout the Debian website repository.
def clone_repository():
    git_opts = f"--git-dir={REPO_DIR}/.git --work-tree={REPO_DIR}"
    REPO_DIR.mkdir(parents=True, exist_ok=True)

    if not exists(f"{REPO_DIR}/.git"):
        call(f"git {git_opts} init", shell=True)
        call(f"git {git_opts} remote add origin {REPO_URL}", shell=True)

    call(f"git {git_opts} config core.sparseCheckout true", shell=True)
    with open(f"{REPO_DIR}/.git/info/sparse-checkout", "w") as f:
        f.write("english/News/")

    ret_code = call(f"git {git_opts} pull --depth 1 origin master", shell=True)
    exit(-ret_code) if ret_code < 0 else None


def extract_major_releases(releases):
    child = subprocess.Popen(
        f"grep -RhE -A 1 '<define-tag pagetitle>Debian [0-9]+.+</q> released' {REPO_DIR}/english/News "
        f"| cut -d '<' -f 2 "
        f"| cut -d '>' -f 2 "
        f"| grep -v -- '--'",
        shell=True, stdout=subprocess.PIPE)
    output = child.communicate()[0].decode('utf-8')

    is_release_line = True
    version = None
    for line in output.split('\n'):
        if line:
            if is_release_line:
                version = line.split(" ")[1]
                is_release_line = False
            else:
                date = line
                releases[version] = date
                print(f"{version}: {date}")
                is_release_line = True


def extract_point_releases(releases):
    child = subprocess.Popen(
        f"grep -Rh -B 10 '<define-tag revision>' {REPO_DIR}/english/News "
        "| grep -Eo '(release_date>(.*)<|revision>(.*)<)' "
        "| cut -d '>' -f 2,4 "
        "| tr -d '<' "
        "| sed 's/[[:space:]]+/ /' "
        "| paste -d ' ' - -",
        shell=True, stdout=subprocess.PIPE)
    output = child.communicate()[0].decode('utf-8')

    for line in output.split('\n'):
        if line:
            parts = line.split(' ')
            date = parts[0]
            version = parts[1]
            print(f"{version}: {date}")
            releases[version] = date


print(f"::group::{PRODUCT}")
clone_repository()
all_releases = {}
extract_major_releases(all_releases)
extract_point_releases(all_releases)
endoflife.write_releases(PRODUCT, dict(
    # sort by date then version (desc)
    sorted(all_releases.items(), key=lambda x: (x[1], x[0]), reverse=True)
))
print("::endgroup::")