"""Absolute native budgets/source pins; no actual-v2 positive admission claim."""
from datetime import datetime,timedelta,timezone
from pathlib import Path
import signal
import sys
import threading
import time
from types import SimpleNamespace

import pytest
sys.path.insert(0,str(Path(__file__).resolve().parents[1]/'scripts'))
from test_task_execution_native_fixture import owner,bao_dev,compiler
from task_execution_native_fixture import NativeFixtureAdapter,_absolute_budget
from task_execution_journal import Refused


def test_absolute_budget_interrupts_source_work_and_restores_timer():
    before=signal.getitimer(signal.ITIMER_REAL)
    started=time.monotonic()
    with pytest.raises(Refused):
        with _absolute_budget(.03):time.sleep(.5)
    assert time.monotonic()-started<.3
    assert signal.getitimer(signal.ITIMER_REAL)==before


def test_nested_budget_cannot_refresh_outer_deadline():
    started=time.monotonic()
    with pytest.raises(Refused):
        with _absolute_budget(.05):
            time.sleep(.02)
            with _absolute_budget(1):time.sleep(.5)
    assert time.monotonic()-started<.3


def test_absolute_budget_rejects_foreign_threads():
    refused=[]
    def run():
        try:
            with _absolute_budget(1):pass
        except Refused:refused.append(True)
    worker=threading.Thread(target=run);worker.start();worker.join(2)
    assert refused==[True]


def test_slow_compiler_is_interrupted_before_native_effect():
    native=object.__new__(NativeFixtureAdapter)
    native.deadline=datetime.now(timezone.utc)+timedelta(seconds=5.05)
    native.monotonic_deadline=time.monotonic()+5.05
    native.binding='synthetic';native.plan=None;native.task=object();native._next_metadata=0
    native.journal=SimpleNamespace(_held=True,_admission='synthetic',_consumed_admission='synthetic',observe=lambda binding:{'state':'applying'})
    native.compiler=SimpleNamespace(pins=[],before_call=lambda *args:time.sleep(.5))
    sent=[];native._business=lambda *args,**kwargs:sent.append(True)
    with pytest.raises(Refused):native.metadata_call(0)
    assert sent==[]


@pytest.mark.parametrize('phase',['headers','body','body-and-slow-close'])
def test_absolute_transport_budget_interrupts_drip(phase,monkeypatch):
    from http.server import BaseHTTPRequestHandler,ThreadingHTTPServer
    class Drip(BaseHTTPRequestHandler):
        def log_message(self,*args):pass
        def do_GET(self):
            if phase=='headers':
                try:
                    for value in b'HTTP/1.1 200 OK\r\nX-Drip: '+b' '*1000:
                        self.connection.sendall(bytes([value]));time.sleep(.05)
                except (BrokenPipeError,ConnectionResetError):pass
                return
            self.send_response(200);self.send_header('Content-Type','application/json');self.send_header('Content-Length','1000');self.end_headers()
            try:
                for _ in range(1000):
                    self.wfile.write(b' ');self.wfile.flush();time.sleep(.05)
            except (BrokenPipeError,ConnectionResetError):pass
    server=ThreadingHTTPServer(('127.0.0.1',0),Drip)
    server.daemon_threads=True
    thread=threading.Thread(target=server.serve_forever,daemon=True);thread.start()
    native=object.__new__(NativeFixtureAdapter);native.host='127.0.0.1';native.port=server.server_port
    native.admission=SimpleNamespace(server_process=SimpleNamespace(poll=lambda:None))
    if phase=='body-and-slow-close':
        import http.client
        original_close=http.client.HTTPConnection.close
        def slow_close(connection):
            original_close(connection);time.sleep(5)
        monkeypatch.setattr(http.client.HTTPConnection,'close',slow_close)
    start=time.monotonic()
    try:
        with pytest.raises(Refused):native._http('GET','drip','synthetic')
        assert time.monotonic()-start<2.6
    finally:server.shutdown();server.server_close();thread.join(2)


def test_cleanup_remains_independent_but_absolute_after_business_expiry(owner,monkeypatch):
    from test_task_execution_native_fixture import admit
    from task_execution_cleanup import run_cleanup
    native,journal,binding,call,*_=owner
    with journal.locked():
        admit(native,journal,binding);native.materialize_grant()
        original=native._http
        def stalled(method,path,token,body=b''):
            if path=='auth/token/revoke-self' and token==native.task.token:time.sleep(5)
            return original(method,path,token,body)
        monkeypatch.setattr(native,'_http',stalled)
        native.monotonic_deadline=time.monotonic()-1
        native._task_monotonic_deadline=time.monotonic()-1
        started=time.monotonic();result=run_cleanup(journal,binding,native)
        assert time.monotonic()-started<3
        assert not result['confirmed']
        assert [x['outcome'] for x in result['obligations']]==['unconfirmed','confirmed','confirmed']
        assert journal.observe(binding)['external_outcome_unknown']
        # Explicit independent synthetic owner recovery, never adapter retry.
        assert call('POST','auth/token/revoke-accessor',{'accessor':native.task.accessor})[0] in {200,204}


def test_absolute_budget_invalid_input_and_conflicting_timer_refuse():
    original_handler=signal.getsignal(signal.SIGALRM)
    original_timer=signal.getitimer(signal.ITIMER_REAL)
    for value in [True,None,0,-1,float('nan'),float('inf')]:
        with pytest.raises(Refused):
            with _absolute_budget(value):pass
        assert signal.getsignal(signal.SIGALRM)==original_handler
        assert signal.getitimer(signal.ITIMER_REAL)==original_timer
    try:
        signal.signal(signal.SIGALRM,lambda *args:None)
        signal.setitimer(signal.ITIMER_REAL,1)
        with pytest.raises(Refused):
            with _absolute_budget(.1):pass
        assert signal.getitimer(signal.ITIMER_REAL)[0]>0
    finally:
        signal.setitimer(signal.ITIMER_REAL,0)
        signal.signal(signal.SIGALRM,original_handler)


def test_actual_credential_bound_interrupts_before_later_global_deadline():
    native=object.__new__(NativeFixtureAdapter)
    native.deadline=datetime.now(timezone.utc)+timedelta(minutes=10)
    native.monotonic_deadline=time.monotonic()+600
    native._task_wall_deadline=datetime.now(timezone.utc)+timedelta(seconds=5.05)
    native._task_monotonic_deadline=time.monotonic()+5.05
    native.binding='synthetic';native.plan=None;native.task=object();native._next_metadata=0
    native.journal=SimpleNamespace(_held=True,_admission='synthetic',_consumed_admission='synthetic',observe=lambda binding:{'state':'applying'})
    native.compiler=SimpleNamespace(pins=[],before_call=lambda *args:time.sleep(.5))
    sent=[];native._business=lambda *args,**kwargs:sent.append(True)
    started=time.monotonic()
    with pytest.raises(Refused):native.metadata_call(0)
    assert time.monotonic()-started<.3 and sent==[]



@pytest.mark.parametrize('case',['valid','drift','writable','symlink','fifo','oversize'])
def test_exact_owner_source_bundle_is_bounded_and_fails_closed(tmp_path,case):
    import hashlib
    import os
    from task_execution_mediator import _source_bundle
    source=tmp_path/'owner-source.py';source.write_bytes(b'# independently installed source\n');source.chmod(0o600)
    roles=['engine_dispatcher','platform_mediator','typed_ccr','policy_auth']
    item={'path':str(source),'sha256':'sha256:'+hashlib.sha256(source.read_bytes()).hexdigest()}
    descriptor={'source_bundle':{role:dict(item) for role in roles}}
    if case=='valid':_source_bundle(descriptor);return
    if case=='drift':source.write_bytes(b'# drift\n')
    elif case=='writable':source.chmod(0o666)
    elif case=='symlink':
        target=tmp_path/'target.py';source.rename(target);source.symlink_to(target)
    elif case=='fifo':source.unlink();os.mkfifo(source,0o600)
    elif case=='oversize':source.write_bytes(b'X'*1048577)
    started=time.monotonic()
    with pytest.raises(Refused):_source_bundle(descriptor)
    assert time.monotonic()-started<.5