"""Issue #33: the job budget travels, the wait caps follow it, and the two
clocks that close a job carry different labels.

- B1: the real wrapper takes the budget from --timeout > $MAM_JOB_TIMEOUT_S > 3600.
- B2: the loop runner derives its wait caps from the budget (+300 s) and hands
  the wrapper that budget explicitly; both hops run for real.
- B3: the real wrapper + subscriber label a spent budget `wall_clock_timeout`
  (subscriber rc 4) and silence `deadline_timeout` (rc 2); caller rc is 2 for
  both. These need the live broker from the environment (like test_issue6 t1_1).
- B4: the remote runner's two deadline wordings lead with the new label.
- B5: the sub-job table files `wall_clock_timeout` closes as unconfirmed.
"""

from __future__ import annotations

import json
import os
import re
import signal
import subprocess
import sys
import time
import uuid
from pathlib import Path

import pytest

REPO_ROOT = Path(__file__).resolve().parent.parent
SKILLS = REPO_ROOT / ".agents" / "skills"
WRAPPER = SKILLS / "multi-agent-mux-delegate-job" / "multi-agent-mux-delegate-job"
REGISTRY = SKILLS / "multi-agent-mux-delegate-job" / "scripts" / "registry.py"
PUBLISH = SKILLS / "multi-agent-mux-delegate-job" / "scripts" / "publish_event.py"

if str(SKILLS) not in sys.path:
    sys.path.insert(0, str(SKILLS))

UNREACHABLE = {"MQTT_BROKER": "127.0.0.1", "MQTT_PORT": "9", "MQTT_TLS": "0"}


def _env(home: Path, extra=None, broker: bool = False) -> dict:
    env = dict(os.environ)
    env["DELEGATE_JOB_PYTHON"] = sys.executable
    env["AGENT_PYTHON_BIN"] = sys.executable
    env["HOME"] = str(home)
    env["WORKSPACE_ROOT"] = str(home)
    env["PYTHONPATH"] = str(SKILLS)
    env["DELEGATE_JOB_LOGS_DIR"] = str(home / "logs")
    for k in ("MAM_JOBS_DIR", "MAM_REAL_ROOT", "MAM_JOB_ID", "MAM_JOB_TIMEOUT_S", "MAM_CHILD_WAIT_S",
              "MAM_WAIT_GRACE_S"):
        env.pop(k, None)
    if not broker:
        env["MAM_ENV_FILE"] = str(home / ".mam.env.absent")
        for k in ("MQTT_BROKER", "MQTT_HOST", "MQTT_PORT", "MQTT_TLS", "MQTT_USERNAME", "MQTT_PASSWORD"):
            env.pop(k, None)
        env.update(UNREACHABLE)
    if extra:
        env.update({k: str(v) for k, v in extra.items()})
    return env


def _dry_submit(env: dict, reg: Path, *extra: str) -> subprocess.CompletedProcess:
    return subprocess.run(["bash", str(WRAPPER), "submit", "--agent", "human", "--dry-run",
                           "--registry-dir", str(reg), "--prompt", "p", *extra],
                          capture_output=True, text=True, env=env, cwd=env["HOME"], timeout=120)


def _jid(res: subprocess.CompletedProcess) -> str:
    assert res.returncode == 0, res.stdout + res.stderr
    m = re.search(r"registered job:\s*(\S+)", res.stdout)
    assert m, res.stdout
    return m.group(1)


def _record(reg: Path, jid: str) -> dict:
    return json.loads((reg / f"{jid}.json").read_text(encoding="utf-8"))


def _events(reg: Path, jid: str) -> list:
    p = reg / f"{jid}.events.log"
    return [json.loads(l) for l in p.read_text().splitlines() if l.strip()] if p.exists() else []


def _publish(env: dict, reg: Path, jid: str, event: str, *extra: str) -> subprocess.CompletedProcess:
    tok = _record(reg, jid)["dispatch_token"]
    res = subprocess.run([sys.executable, str(PUBLISH), "--registry-dir", str(reg), "--job", jid,
                          "--event", event, "--expect-dispatch-token", tok, *extra],
                         capture_output=True, text=True, env=env, timeout=120)
    assert res.returncode in (0, 2), res.stderr
    return res


def _kill_timer(reg: Path, jid: str) -> None:
    try:
        os.kill(int((reg / f"{jid}.heartbeat.pid").read_text().strip()), signal.SIGKILL)
    except (OSError, ValueError):
        pass


# ---------------------------------------------------------------------------
# B1 - the wrapper's budget: --timeout > MAM_JOB_TIMEOUT_S > 3600
# ---------------------------------------------------------------------------

@pytest.mark.parametrize("env_val,flag,expected,warns", [
    (None, None, 3600, False),
    ("7", None, 7, False),
    ("7", "9", 9, False),
    ("abc", None, 3600, True),
])
def test_b1_the_wrapper_takes_the_budget_from_flag_env_or_default(tmp_path, env_val, flag, expected, warns):
    env = _env(tmp_path, {"MAM_JOB_TIMEOUT_S": env_val} if env_val else None)
    res = _dry_submit(env, tmp_path / "reg", *(["--timeout", flag] if flag else []))
    assert _record(tmp_path / "reg", _jid(res))["timeout_sec"] == expected
    assert ("MAM_JOB_TIMEOUT_S=abc ignored" in res.stderr) is warns, res.stderr


# ---------------------------------------------------------------------------
# B2 - the runner: budget -> wait caps, and the budget handed to the wrapper
# ---------------------------------------------------------------------------

def _runner(tmp_path, monkeypatch, *argv, **env):
    monkeypatch.setenv("WORKSPACE_ROOT", str(tmp_path))
    monkeypatch.setenv("MAM_JOBS_DIR", str(tmp_path / "reg"))
    monkeypatch.setenv("DELEGATE_JOB_LOGS_DIR", str(tmp_path / "logs"))
    for k in ("MAM_REAL_ROOT", "MAM_JOB_TIMEOUT_S", "MAM_CHILD_WAIT_S", "MAM_WAIT_GRACE_S", "MAM_JOB_TREE_MAX"):
        monkeypatch.delenv(k, raising=False)
    for k, v in env.items():
        monkeypatch.setenv(k, str(v))
    from lib_py.loop import runner as lr
    r = lr.LoopRunner(["--creator", "c", "--task", "t", *argv])
    r.parse_args()
    return r


def test_b2_the_wait_caps_are_the_budget_plus_300(tmp_path, monkeypatch):
    assert _runner(tmp_path, monkeypatch, "--job-timeout", "10").job_wait_s == 310
    assert _runner(tmp_path, monkeypatch, MAM_JOB_TIMEOUT_S=20).job_wait_s == 320
    assert _runner(tmp_path, monkeypatch, "--job-timeout", "10", MAM_JOB_TIMEOUT_S=20).job_wait_s == 310
    r = _runner(tmp_path, monkeypatch)
    assert (r.job_budget, r.job_wait_s) == (3600, 3900)  # no option: today's numbers
    assert "--job-timeout" in "\n".join(_usage_lines(r))


def _usage_lines(r):
    import io, contextlib
    buf = io.StringIO()
    with contextlib.redirect_stdout(buf), contextlib.redirect_stderr(buf):
        try:
            r.print_usage()
        except SystemExit:
            pass
    return buf.getvalue().splitlines()


def test_b2_an_invalid_job_timeout_is_refused(tmp_path, monkeypatch):
    with pytest.raises(SystemExit):
        _runner(tmp_path, monkeypatch, "--job-timeout", "0")


def test_b2_the_child_wait_defaults_to_the_budget_and_an_explicit_value_wins(tmp_path, monkeypatch, capsys):
    env = _env(tmp_path)
    reg = tmp_path / "reg"
    p = _jid(_dry_submit(env, reg))
    _jid(_dry_submit(env, reg, "--parent-job", p))

    start = time.time()
    r = _runner(tmp_path, monkeypatch, "--job-timeout", "1", MAM_WAIT_GRACE_S=1)
    assert r.wait_for_descendants(p, interval=0.5) is False
    assert 2 <= time.time() - start < 8
    assert "ended after 2s (MAM_CHILD_WAIT_S default: job budget 1 + 1)" in capsys.readouterr().out

    start = time.time()
    r = _runner(tmp_path, monkeypatch, "--job-timeout", "600", MAM_CHILD_WAIT_S=2)
    assert r.wait_for_descendants(p, interval=0.5) is False
    assert 2 <= time.time() - start < 8
    assert "ended after 2s (MAM_CHILD_WAIT_S)" in capsys.readouterr().out


def test_b2_the_runner_hands_the_wrapper_its_budget_and_the_wrapper_registers_it(tmp_path, monkeypatch):
    # hop 1: the runner execs the wrapper with --timeout (a recording wrapper at the control root)
    rec = tmp_path / "rec.args"
    w = tmp_path / ".agents" / "skills" / "multi-agent-mux-delegate-job" / "multi-agent-mux-delegate-job"
    w.parent.mkdir(parents=True)
    w.write_text(f'#!/usr/bin/env bash\nprintf "%s\\n" "$@" > "{rec}"\necho "registered job: fake33"\n')
    w.chmod(0o755)
    r = _runner(tmp_path, monkeypatch, "--job-timeout", "10")
    assert r.delegate_job("c", "claude", "Worker", "task") == "fake33"
    args = rec.read_text().splitlines()
    assert args[args.index("--timeout") + 1] == "10"
    # env only: still passed explicitly
    r = _runner(tmp_path, monkeypatch, MAM_JOB_TIMEOUT_S=20)
    assert r.contract_args()[:2] == ["--timeout", "20"]

    # hop 2: the real wrapper registers what the runner hands it
    reg = tmp_path / "reg2"
    res = _dry_submit(_env(tmp_path), reg, *_runner(tmp_path, monkeypatch, "--job-timeout", "10").contract_args())
    assert _record(reg, _jid(res))["timeout_sec"] == 10


# ---------------------------------------------------------------------------
# B3 - the real wrapper + subscriber: which clock closed the job
# ---------------------------------------------------------------------------

def _run_wrapper_bg(env: dict, reg: Path, *extra: str) -> subprocess.Popen:
    return subprocess.Popen(["bash", str(WRAPPER), "submit", "--agent", "human", "--registry-dir", str(reg),
                             "--workdir", env["HOME"], "--prompt", "b3", *extra],
                            stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True, env=env, cwd=env["HOME"])


def _wait_subscribed(reg: Path, timeout: float = 30) -> str:
    deadline = time.time() + timeout
    while time.time() < deadline:
        for f in reg.glob("*.subscriber.out"):
            if "SUBSCRIBED" in f.read_text(errors="replace"):
                return f.name.split(".")[0]
        time.sleep(0.1)
    raise AssertionError("the subscriber never subscribed (is the broker up?)")


def _last_error(reg: Path, jid: str) -> str:
    errs = [e for e in _events(reg, jid) if e.get("event") == "error"]
    assert errs, _events(reg, jid)
    return errs[-1].get("detail", "")


def test_b3_wall_clock_before_idle_is_labelled_wall_clock_timeout(tmp_path):
    env = _env(tmp_path, broker=True)
    reg = tmp_path / "jobs"
    proc = _run_wrapper_bg(env, reg, "--timeout", "3", "--idle-timeout", "30")
    out, err = proc.communicate(timeout=90)
    assert proc.returncode == 2, out + err
    jid = next(reg.glob("*.json")).stem
    assert _record(reg, jid)["status"] == "error"
    assert _last_error(reg, jid) == "wall_clock_timeout"
    assert "wall-clock timeout" in (reg / f"{jid}.subscriber.out").read_text()
    assert "closed by wall_clock clock" in err


def test_b3_silence_is_still_labelled_deadline_timeout(tmp_path):
    env = _env(tmp_path, broker=True)
    reg = tmp_path / "jobs"
    proc = _run_wrapper_bg(env, reg, "--timeout", "30", "--idle-timeout", "2")
    try:
        jid = _wait_subscribed(reg)
        _publish(env, reg, jid, "started")  # then nothing: silence for K x N
        out, err = proc.communicate(timeout=90)
    finally:
        proc.kill()
    assert proc.returncode == 2, out + err
    assert _record(reg, jid)["status"] == "error"
    assert _last_error(reg, jid) == "deadline_timeout"
    assert "idle timeout" in (reg / f"{jid}.subscriber.out").read_text()
    assert "closed by no_event clock" in err


def test_b3_a_heartbeating_job_that_spends_its_budget_is_wall_clock_timeout(tmp_path):
    """The #33 motivating case: a live agent (heartbeats keep coming) whose
    work outlasts the budget was reported as `deadline_timeout`."""
    env = _env(tmp_path, broker=True)
    reg = tmp_path / "jobs"
    proc = _run_wrapper_bg(env, reg, "--timeout", "6", "--idle-timeout", "3")
    jid = None
    try:
        jid = _wait_subscribed(reg)
        _publish(env, reg, jid, "started", "--heartbeat", "1")
        out, err = proc.communicate(timeout=90)
    finally:
        proc.kill()
        if jid:
            _kill_timer(reg, jid)
    assert proc.returncode == 2, out + err
    assert _last_error(reg, jid) == "wall_clock_timeout"
    assert "wall-clock timeout" in (reg / f"{jid}.subscriber.out").read_text()


# ---------------------------------------------------------------------------
# B4 - the remote runner's deadlines are wall clocks
# ---------------------------------------------------------------------------

def _dispatch(timeout_sec=1) -> dict:
    return {"job_id": uuid.uuid4().hex[:8], "brief": "b", "dispatch_token": "tok-" + uuid.uuid4().hex,
            "attempt_id": 1, "auth_token": None, "timeout_sec": timeout_sec, "heartbeat_sec": 30,
            "heartbeat_misses": 4, "ack_timeout_sec": 5}


@pytest.mark.parametrize("cmd,prefix", [("sleep 5", "wall_clock_timeout: agent command exceeded timeout_sec 1"),
                                        (None, "wall_clock_timeout (remote runner)")])
def test_b4_the_remote_runner_labels_its_deadline_wall_clock_timeout(tmp_path, monkeypatch, cmd, prefix):
    from lib_py.delegation import remote
    for k, v in _env(tmp_path).items():
        monkeypatch.setenv(k, v)
    monkeypatch.chdir(tmp_path)
    reg = tmp_path / "jobs"
    d = _dispatch()
    try:
        remote.handle_dispatch(d, str(reg), "s", cmd)
        assert _record(reg, d["job_id"])["status"] == "error"
        assert _last_error(reg, d["job_id"]).startswith(prefix)
    finally:
        _kill_timer(reg, d["job_id"])


# ---------------------------------------------------------------------------
# B5 - the sub-job table: a wall-clock close is unconfirmed, like a deadline close
# ---------------------------------------------------------------------------

@pytest.mark.parametrize("request_kind,detail", [
    ("wall_clock_timeout", "wall_clock_timeout"),
    ("wall_clock_timeout", "wall_clock_timeout: agent command exceeded timeout_sec 1"),
    ("deadline_timeout", "deadline_timeout"),
])
def test_b5_a_wall_clock_close_is_closed_unconfirmed(tmp_path, monkeypatch, request_kind, detail):
    env = _env(tmp_path)
    reg = tmp_path / "reg"
    p = _jid(_dry_submit(env, reg))
    c = _jid(_dry_submit(env, reg, "--parent-job", p))
    tok = _record(reg, c)["dispatch_token"]
    res = subprocess.run([sys.executable, str(REGISTRY), "--registry-dir", str(reg), "close", "--job", c,
                          "--request", request_kind, "--expect-dispatch-token", tok],
                         capture_output=True, text=True, env=env, timeout=120)
    assert res.returncode == 0, res.stderr
    assert _record(reg, c)["status"] == "error"
    _publish(env, reg, c, "error", "--detail", detail)
    block = _runner(tmp_path, monkeypatch)._subjobs_block([p])
    assert f"| CLOSED-UNCONFIRMED | {detail} |" in block, block