#!/usr/bin/env python3
"""Emit a JUnit report marking every discovered Chainsaw test as *skipped*.

Used in Phase 0 (and any run where no cluster is reachable): the behavior tests are
valid scaffolds but cannot execute without a cluster, so instead of failing the suite we
emit a JUnit file whose testcases are `<skipped>` with the reason. This keeps the
merge/phase gate green while the coverage report still shows which requirements have a
verifying test. As later phases deliver a dev/test cluster, run.sh hands execution to
Chainsaw, which emits the real pass/fail JUnit and this shim is no longer used.

Each testcase carries its verified R-* IDs in the `classname` + a property so the JUnit
remains requirement-tagged (R-TEST-04) even in skipped form.
"""
from __future__ import annotations

import argparse
import re
import sys
import xml.etree.ElementTree as ET
from pathlib import Path
from xml.dom import minidom

LABEL_PREFIX = "conformance.home.k3s"
LABEL_LINE_RE = re.compile(
    r"^\s*" + re.escape(LABEL_PREFIX) + r"/(R-[A-Z0-9]+-[0-9]+)\s*:\s*[\"']?true", re.I
)


def collect(path: Path) -> tuple[str, list[str], str]:
    text = path.read_text()
    name_m = re.search(r"^\s*name:\s*(\S+)", text, re.M)
    name = name_m.group(1) if name_m else path.parent.name
    reqs = sorted({m.group(1).upper() for m in
                   (LABEL_LINE_RE.match(l) for l in text.splitlines()) if m})
    rel = str(path)
    layer = ("L0" if "l0-static" in rel
             else "L1" if "l1-rendering" in rel else "L2" if "l2-behavioral" in rel
             else "L3" if "l3-fault-injection" in rel else "META")
    return name, reqs, layer


def main() -> int:
    ap = argparse.ArgumentParser(description=__doc__)
    here = Path(__file__).resolve().parent.parent
    ap.add_argument("--tests", type=Path, default=here / "tests")
    ap.add_argument("--out", type=Path,
                    default=here / "_artifacts" / "report.junit.xml")
    ap.add_argument("--reason", default="no cluster reachable (Phase 0 scaffold): "
                    "behavior test not executed")
    args = ap.parse_args()

    files = sorted(args.tests.rglob("chainsaw-test.yaml"))
    suite = ET.Element("testsuite", {
        "name": "home-k3s-conformance (scaffold/skipped)",
        "tests": str(len(files)),
        "failures": "0",
        "errors": "0",
        "skipped": str(len(files)),
    })
    for f in files:
        name, reqs, layer = collect(f)
        tc = ET.SubElement(suite, "testcase", {
            # classname carries layer + requirement tags so the JUnit stays traceable.
            "classname": f"{layer}:{','.join(reqs) if reqs else 'UNTAGGED'}",
            "name": name,
        })
        props = ET.SubElement(tc, "properties")
        ET.SubElement(props, "property",
                      {"name": "requirements", "value": ",".join(reqs)})
        ET.SubElement(props, "property", {"name": "layer", "value": layer})
        ET.SubElement(props, "property", {"name": "path", "value": str(f)})
        ET.SubElement(tc, "skipped", {"message": args.reason})

    root = ET.Element("testsuites", {
        "name": "home-k3s-conformance",
        "tests": str(len(files)),
        "skipped": str(len(files)),
        "failures": "0",
        "errors": "0",
    })
    root.append(suite)

    args.out.parent.mkdir(parents=True, exist_ok=True)
    xml = minidom.parseString(ET.tostring(root, "utf-8")).toprettyxml(indent="  ")
    args.out.write_text(xml)
    print(f"[junit] wrote skipped JUnit for {len(files)} scaffolded test(s) -> {args.out}",
          file=sys.stderr)
    return 0


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