# Copyright 2025 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Pings an email address about any autogenerated CLs that need review."""

import argparse
import logging
from pathlib import Path
from typing import List

from cros_utils import cros_paths
from cros_utils import email_sender
from cros_utils import git_utils


def count_outstanding_cls(chromeos_root: Path) -> int:
    query = " ".join(
        (
            "owner:mobiletc-prebuild@google.com",
            "topic:crostc-auto-cl",
            "status:open",
            "-is:wip",
            "-is:submittable",
        )
    )
    cls = git_utils.query_gerrit(
        chromeos_root,
        query,
    )
    logging.info("CLs matching query %r: %s", query, cls)
    return len(cls)


def main(argv: List[str]) -> None:
    # This is meant to be run from a ChromeOS tree for simplicity.
    chromeos_root = cros_paths.script_chromiumos_checkout_or_exit()

    logging.basicConfig(
        format=">> %(asctime)s: %(levelname)s: %(filename)s:%(lineno)d: "
        "%(message)s",
        level=logging.INFO,
    )

    parser = argparse.ArgumentParser(
        description=__doc__,
        formatter_class=argparse.RawDescriptionHelpFormatter,
    )
    parser.add_argument(
        "--email",
        help="Email to send ping to",
    )
    parser.add_argument(
        "-n",
        "--dry-run",
        action="store_true",
        help="Don't actually send an email",
    )
    opts = parser.parse_args(argv)

    if not (opts.email or opts.dry_run):
        parser.error("You must pass either --dry-run or --email")

    logging.info("Searching for CLs that need a review...")
    num_outstanding_cls = count_outstanding_cls(chromeos_root)
    if not num_outstanding_cls:
        logging.info("No outstanding CLs found; exit")
        return

    logging.info(
        "Sending email notification of %d outstanding CLs", num_outstanding_cls
    )

    # NOTE: Please keep this subject constant, so Chat threads these
    # notifications instead of posting new discussions.
    subject = "Autogenerated CL(s) need review"
    body = (
        f"http://go/crostc-unreviewed-auto-cls says {num_outstanding_cls} "
        "need(s) review"
    )
    if opts.dry_run:
        logging.info("--dry-run specified; skipping sending email")
        logging.info("Subject: %s", subject)
        logging.info("Body: %s", body)
        return

    email_sender.EmailSender().SendX20Email(
        subject=subject,
        identifier="cl-pings",
        text_body=body,
        direct_recipients=(opts.email,),
    )