#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Tests for minagent_header_gate.py (R-470/R-472) — each case writes a CHANGELOG and runs the REAL gate.

Run from controller/:  python3 scripts/test_minagent_header_gate.py
"""
import os
import subprocess
import sys
import tempfile
import unittest

SCRIPTS = os.path.dirname(os.path.abspath(__file__))
GATE = os.path.join(SCRIPTS, "minagent_header_gate.py")


def run(body):
    with tempfile.NamedTemporaryFile("w", suffix=".md", delete=False, encoding="utf-8") as f:
        f.write(body)
        path = f.name
    try:
        env = dict(os.environ, MINAGENT_GATE_CHANGELOG=path)
        p = subprocess.run([sys.executable, GATE], capture_output=True, text=True, env=env)
        return p.returncode, p.stdout + p.stderr
    finally:
        os.unlink(path)


class MinAgentHeaderGateTest(unittest.TestCase):
    def test_header_line_passes(self):
        rc, out = run("## v0.239.0 — x (2026-09-13)\n\n**MinAgent: 0.129.0** (unchanged)\n\nbody\n\n## v0.238.1 — y\n")
        self.assertEqual(rc, 0, out)
        self.assertIn("v0.239.0 declares MinAgent 0.129.0", out)

    def test_missing_line_fails_naming_the_header(self):
        rc, out = run("## v0.239.0 — x (2026-09-13)\n\nbody\n\n## v0.238.1 — y\n\n**MinAgent: 0.129.0** (unchanged)\n")
        self.assertEqual(rc, 1, out)
        self.assertIn("v0.239.0", out)

    def test_decoy_body_mention_is_not_the_line(self):
        """R-421: the word in prose, a code span, or a non-bold form is the LABEL without the FACT.

        COMPANION RED-PROOF F (REPORT.md): relax MINAGENT_LINE_RE to a plain search for 'MinAgent'.
        This test then passes the decoy and fails."""
        decoy = ("## v0.239.0 — x (2026-09-13)\n\n"
                 "MinAgent is unchanged from the previous release, see `**MinAgent: 0.129.0**` there.\n"
                 "The agent requirement (MinAgent: 0.129.0) did not move.\n\n## v0.238.1 — y\n")
        rc, out = run(decoy)
        self.assertEqual(rc, 1, out)

    def test_no_header_is_inconclusive(self):
        rc, out = run("# CHANGELOG\n\nnothing released\n")
        self.assertEqual(rc, 2, out)


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