#!/usr/bin/env python3
"""Review and sign-off on a Gitea pull request.

Submits a review (APPROVE, COMMENT, REQUEST_CHANGES). CLI merge is disabled:
the `--merge` flag is retained only for compatibility and fails closed without
making any API call. Merge is handled solely by the gated `gitea_merge_pr` MCP
workflow (#16), which enforces identity/profile/eligibility, explicit
confirmation, expected head SHA checking, and self-merge protection.

Live review submission is also disabled (#211): use the gated
``gitea_submit_pr_review`` MCP workflow, which enforces validation-phase
dry-run, final decision marking, and single-terminal review mutation rules.

Usage (review only — disabled):
    review_pr.py --pr-number 12 --event APPROVE --body "Approved and signed off"
"""
import os
import sys
import argparse

# Auto-execute using the project's local virtual environment Python
PROJECT_ROOT = os.path.dirname(os.path.abspath(__file__))
venv_python = os.path.join(PROJECT_ROOT, "venv", "bin", "python3")
if os.path.exists(venv_python) and sys.executable != venv_python:
    os.execv(venv_python, [venv_python] + sys.argv)

from gitea_auth import add_remote_args


def main(argv=None):
    parser = argparse.ArgumentParser(description="Review and sign-off on a Gitea pull request.")
    add_remote_args(parser)
    parser.add_argument("--pr-number", type=int, required=True, help="PR number/index to review.")
    parser.add_argument("--event", choices=["APPROVE", "COMMENT", "REQUEST_CHANGES"], default="APPROVE",
                        help="Review event/action type (default: APPROVE).")
    parser.add_argument("--body", default="", help="Review body/comment text.")
    parser.add_argument("--body-file", help="Read review body from this file ('-' for stdin).")
    parser.add_argument("--merge", action="store_true",
                        help="DISABLED — fails closed with no API call. CLI merge is not "
                             "supported; use the gated gitea_merge_pr MCP workflow (#16).")
    parser.add_argument("--merge-method", choices=["merge", "squash", "rebase"], default="merge",
                        help="Ignored — CLI merge is disabled (see --merge).")
    args = parser.parse_args(argv)

    if args.merge:
        print(
            "Direct CLI merge is disabled. Merge is only available through the "
            "gated #16 workflow (MCP tool 'gitea_merge_pr'), which enforces "
            "identity/profile/eligibility, explicit confirmation, expected head "
            "SHA checking, and self-merge protection. Re-run without --merge to "
            "see the review-submission guard message.",
            file=sys.stderr,
        )
        return 2

    print(
        "Direct CLI review submission is disabled (#211). Use the gated "
        "'gitea_submit_pr_review' MCP workflow, which enforces validation-phase "
        "dry-run, gitea_mark_final_review_decision, and single-terminal review "
        "mutation rules.",
        file=sys.stderr,
    )
    return 2


if __name__ == "__main__":
    sys.exit(main())