#!/usr/bin/env python3
"""Self-check for infra/playwright-summary.py — stdlib asserts, no framework.

Run: python3 infra/test_playwright_summary.py  (also runs in `make unit`).

A red e2e is only useful if the job summary says WHY it failed: #161 lost a 36-minute
verify-stack job whose only surviving output was one ✘ line with no assertion detail.
"""
import importlib.util
import io
import json
import os
import tempfile
from contextlib import redirect_stdout

# The script's filename is not a valid module name, so load it by path.
spec = importlib.util.spec_from_file_location(
    "playwright_summary",
    os.path.join(os.path.dirname(os.path.abspath(__file__)), "playwright-summary.py"),
)
summary = importlib.util.module_from_spec(spec)
spec.loader.exec_module(summary)


def render(report):
    """Run the renderer over a report dict and return its markdown."""
    with tempfile.NamedTemporaryFile("w", suffix=".json", delete=False) as fh:
        json.dump(report, fh)
        path = fh.name
    try:
        out = io.StringIO()
        with redirect_stdout(out):
            summary.main(path)
        return out.getvalue()
    finally:
        os.unlink(path)


def spec_entry(title, status, errors=()):
    return {
        "title": title,
        "file": "catalogus.spec.ts",
        "ok": status == "expected",
        "tests": [{"status": status, "results": [{"errors": [{"message": m} for m in errors]}]}],
    }


def test_failing_spec_reports_why():
    md = render({
        "stats": {"expected": 4, "unexpected": 1, "flaky": 0, "skipped": 0, "duration": 108_000},
        "suites": [{"file": "catalogus.spec.ts", "specs": [
            spec_entry("a beheerder sees the published zaaktypen in the catalogus", "unexpected",
                       ["locator.fill: Test timeout of 90000ms exceeded.\n"
                        "Call log:\n  - waiting for locator('#username')\n"]),
        ]}],
    })
    assert "❌" in md, md
    # The point of the slice: the summary names the cause, not just the verdict.
    assert "Test timeout of 90000ms exceeded" in md, md
    assert "waiting for locator('#username')" in md, md
    # A multi-line Playwright error must not break out of its table row.
    assert not any(line.startswith("Call log:") for line in md.splitlines()), md


def test_passing_run_stays_quiet():
    md = render({
        "stats": {"expected": 1, "unexpected": 0, "flaky": 0, "skipped": 0, "duration": 5_000},
        "suites": [{"file": "catalogus.spec.ts",
                    "specs": [spec_entry("a beheerder sees the catalogus", "expected")]}],
    })
    assert "✅" in md, md
    assert "timeout" not in md.lower(), md


def test_missing_report_is_not_a_crash():
    out = io.StringIO()
    with redirect_stdout(out):
        rc = summary.main("/nonexistent/playwright-report.json")
    assert rc == 0
    assert "did not reach the e2e step" in out.getvalue()


if __name__ == "__main__":
    for name, fn in sorted(globals().items()):
        if name.startswith("test_") and callable(fn):
            fn()
            print(f"  ok  {name}")
    print("playwright-summary self-check passed")