#!/usr/bin/env python3
# Row 110 round 2 (#1604), Sage's ask in comment 28355: the narrowing mutant.
# server.mjs:50 refuses an envelope that carries more than one of cap, human and
# tester. The mutant narrows the conflict check so a cap counts only when it is
# alone or is a reader cap (role null, not human). A role cap sent with a tester
# proof then passes the envelope and the request runs as the tester.
# Runs the FULL bus suite (node --test tests/*.test.mjs in packages/bus), not
# one named test. Restores server.mjs from the .orig copy whatever happens.
import os, shutil, subprocess, sys, signal

WT = os.path.expanduser('~/darkwing-scratch/r110/wt')
SRC = os.path.join(WT, 'packages/bus/src/server.mjs')
LOG = sys.argv[1]
OLD = "          [r.cap, r.human, r.tester].filter(Boolean).length !== 1\n"
NEW = ("          [r.cap && (!(r.human || r.tester) || ((c) => { try { const i = broker.identity(c); "
       "return i.role === null && !i.human; } catch { return true; } })(r.cap)), r.human, r.tester]"
       ".filter(Boolean).length !== 1\n")

text = open(SRC).read()
if text.count(OLD) != 1:
    sys.exit('STOP the line at server.mjs:50 is not unique or has moved')
if os.path.exists(SRC + '.orig'):
    sys.exit('STOP server.mjs.orig already exists')
shutil.copy2(SRC, SRC + '.orig')
try:
    open(SRC, 'w').write(text.replace(OLD, NEW))
    env = dict(os.environ, TMPDIR=os.path.expanduser('~/darkwing-scratch/r110/tmp'))
    with open(LOG, 'w') as out:
        p = subprocess.Popen('node --test tests/*.test.mjs', shell=True, cwd=os.path.join(WT, 'packages/bus'),
                             stdout=out, stderr=subprocess.STDOUT, env=env, start_new_session=True)
        try:
            rc = p.wait(timeout=600)
        except subprocess.TimeoutExpired:
            os.killpg(p.pid, signal.SIGKILL)
            p.wait()
            rc = 'timeout'
finally:
    shutil.move(SRC + '.orig', SRC)
restored = open(SRC).read() == text
log = open(LOG).read()
counts = [l for l in log.splitlines() if l.startswith(('ℹ pass', 'ℹ fail', 'ℹ skipped'))]
failed = [l.strip() for l in log.splitlines() if l.lstrip().startswith('✖') and 'failing tests' not in l]
print(f'mutant n1 rc={rc} {" ".join(counts)} restored={restored}')
for f in sorted(set(failed)):
    print('  ' + f)
print('KILLED' if rc != 0 else 'SURVIVED')