from __future__ import annotations

"""Command-line entry point for publishing CI test metrics."""

import argparse
import json
from pathlib import Path

from .summary import load_junit_summary, publish_quality_metrics


def _build_parser() -> argparse.ArgumentParser:
    """Build the CLI parser for the metrics publisher."""

    parser = argparse.ArgumentParser(description="Publish test-suite metrics to Pushgateway")
    parser.add_argument("--gateway", required=True, help="Pushgateway base URL")
    parser.add_argument("--suite", required=True, help="Logical suite name")
    parser.add_argument("--job", default="platform-quality-ci", help="Pushgateway job label")
    parser.add_argument("--status", choices=("ok", "failed"), required=True, help="Gate outcome")
    parser.add_argument("--junit", nargs="*", default=(), help="JUnit XML files to aggregate")
    parser.add_argument("--quality-report", default="build/quality-gate.json", help="Quality gate JSON report")
    return parser


def _load_quality_report(path: Path) -> tuple[float, int]:
    """Read workspace coverage/LOC summary from the quality gate JSON output."""

    if not path.exists():
        return 0.0, 0
    payload = json.loads(path.read_text(encoding="utf-8"))
    coverage = payload.get("workspace_line_coverage_percent")
    if not isinstance(coverage, (int, float)):
        coverage = 0.0
    source_lines = payload.get("source_lines_over_500")
    if not isinstance(source_lines, int):
        source_lines = 0
    return float(coverage), int(source_lines)


def main(argv: list[str] | None = None) -> int:
    """Parse arguments, aggregate JUnit files, and publish metrics."""

    parser = _build_parser()
    args = parser.parse_args(argv)
    summary = load_junit_summary(Path(path) for path in args.junit)
    coverage_percent, source_lines_over_500 = _load_quality_report(Path(args.quality_report))
    publish_quality_metrics(
        gateway=args.gateway,
        suite=args.suite,
        job=args.job,
        status=args.status,
        summary=summary,
        workspace_line_coverage_percent=coverage_percent,
        source_lines_over_500=source_lines_over_500,
    )
    return 0


if __name__ == "__main__":
    raise SystemExit(main())