"""Live pilot admission preparation (NK-WP-0056-T06)."""
from __future__ import annotations

import datetime as dt
import hashlib
import importlib.util
import json
import pathlib
import subprocess
import sys
import tempfile
import unittest

HERE = pathlib.Path(__file__).resolve().parent
spec = importlib.util.spec_from_file_location("prepare_admission", HERE.parent / "prepare_admission.py")
P = importlib.util.module_from_spec(spec)
sys.modules["prepare_admission"] = P
spec.loader.exec_module(P)
START = dt.datetime(2026, 11, 5, 9, 0, tzinfo=dt.UTC)


@unittest.skipUnless((P.REPO / ".git").exists(), "needs a git checkout (CI tests a source tarball)")
class Prepare(unittest.TestCase):
    def setUp(self):
        self.commit = subprocess.run(["git", "-C", str(P.REPO), "rev-parse", "HEAD"], capture_output=True,
                                     text=True, check=True).stdout.strip()

    def test_pins_the_commits_content_and_is_valid(self):
        doc = P.prepare("BEA-2026-0099", self.commit, START, 2)
        spec = doc["spec"]
        self.assertEqual(spec["window"], {"not_before": "2026-11-05T09:00:00Z", "not_after": "2026-11-05T11:00:00Z"})
        self.assertEqual(spec["plan"]["source"]["commit"], self.commit[:12])
        for f in spec["plan"]["source"]["files"]:
            blob = subprocess.run(["git", "-C", str(P.REPO), "show", f"{self.commit}:{f['path']}"],
                                  capture_output=True, check=True).stdout
            self.assertEqual(f["sha256"], hashlib.sha256(blob).hexdigest())
        report = P.bea.evaluate(doc, json.loads(P.bea.SCHEMA.read_text()), as_of=START)
        self.assertTrue(report["valid"], report["findings"])

    def test_refusals(self):
        with tempfile.TemporaryDirectory() as tmp:
            out = pathlib.Path(tmp) / "a.yaml"
            out.write_text("exists")
            with self.assertRaises(SystemExit):
                P.main(["--id", "BEA-2026-0099", "--commit", self.commit, "--not-before", "2026-11-05T09:00:00Z",
                        "--out", str(out)])
            with self.assertRaises(SystemExit):
                P.main(["--id", "BEA-2026-0099", "--commit", self.commit, "--not-before", "2026-11-05T09:00:00Z",
                        "--hours", "3", "--out", str(pathlib.Path(tmp) / "b.yaml")])
            self.assertEqual(P.main(["--id", "BEA-2026-0099", "--commit", "0" * 40, "--not-before",
                                     "2026-11-05T09:00:00Z", "--out", str(pathlib.Path(tmp) / "c.yaml")]), 4)


if __name__ == "__main__":
    unittest.main()