"""Bound this run's native probe or paid job pickup to five minutes."""

from __future__ import annotations

import json
import os
import re
import subprocess
import sys
import time


def wait_for_runner(*, timeout: float = 300, job_name: str | None = None) -> None:
    """Require probe success, or bound pickup of the named paid job."""
    repository = os.environ.get("GITHUB_REPOSITORY", "")
    run_id = os.environ.get("GITHUB_RUN_ID", "")
    if repository != "abhigyanpatwari/GitNexus" or not re.fullmatch(r"\d+", run_id):
        raise ValueError(
            "runner pickup requires this repository's current workflow run"
        )
    until = time.monotonic() + timeout
    paid = job_name is not None
    job_name = job_name or "Verify the runner service is online"
    # Never start a request with no time left, nor let one outlive the deadline.
    while (remaining := until - time.monotonic()) > 0:
        result = subprocess.run(
            [
                "gh",
                "api",
                f"repos/{repository}/actions/runs/{run_id}/jobs?per_page=100",
            ],
            capture_output=True,
            text=True,
            timeout=min(30, remaining),
        )
        if result.returncode:
            raise RuntimeError(
                "cannot verify runner pickup through the current run's jobs API"
            )
        jobs = json.loads(result.stdout).get("jobs", [])
        probes = [
            job for job in jobs if job.get("name", "").split(" / ")[-1] == job_name
        ]
        if len(probes) > 1:
            raise RuntimeError("current run has multiple runner pickup probes")
        if paid and probes:
            if probes[0].get("status") == "in_progress":
                return
            if probes[0].get("status") == "completed":
                if probes[0].get("conclusion") in ("skipped", "cancelled"):
                    raise RuntimeError("paid job did not run")
                return
        if probes and probes[0].get("status") == "completed":
            if probes[0].get("conclusion") != "success":
                raise RuntimeError("runner pickup probe failed")
            return
        time.sleep(min(10, max(0, until - time.monotonic())))
    raise RuntimeError(
        "runner service did not complete its pickup probe before the deadline"
    )


if __name__ == "__main__":
    try:
        args = sys.argv[1:]
        if len(args) == 2 and args[0] == "--job-name" and args[1].strip():
            wait_for_runner(job_name=args[1])
        elif args == []:
            wait_for_runner()
        else:
            raise ValueError("expected no arguments or --job-name NAME")
        print("The dedicated runner picked up this run's requested job.")
    except (
        ValueError,
        RuntimeError,
        subprocess.TimeoutExpired,
        OSError,
        json.JSONDecodeError,
    ) as exc:
        message = (
            str(exc)
            if isinstance(exc, (ValueError, RuntimeError))
            else "runner readiness command failed"
        )
        print(f"::error::{message}")
        raise SystemExit(1) from None