"""ORCH-090 — STOP-status task cancellation + relaunch-hole close (unit + integ).

Covers 04-test-plan.yaml TC-01..TC-14 + the ADR-001 D7 deferred-cancel path:

  TC-01  STOP recognised + routed to handle_stop; unknown task -> no-op, never-raise.
  TC-02  active agent stopped via launcher.stop_process by jobs.pid; idle -> no-op.
  TC-03  queued+running jobs of the task -> terminal 'cancelled'; claim skips them.
  TC-04  reaper does NOT requeue a job of a terminal (cancelled) task.
  TC-05  full reset: remove_worktree + delete_remote_branch called; main untouched.
  TC-06  docs artefacts (and the task row) survive the reset.
  TC-07  idempotency: STOP on cancelled / done / missing -> no-op, no exception.
  TC-08  kill-switch off -> STOP inert; relaunch-hole gate inert.
  TC-09  GET /queue carries a read-only `stop` block; never-raise.
  TC-10  relaunch-hole closed: manual To Analyse on a mid-pipeline task -> no job.
  TC-11  To Analyse on analysis (idle) relaunches analyst; new task -> start_pipeline.
  TC-12  terminal-skip / restart-safe: reconciler skips a cancelled task; cancelled
         jobs are not revived by requeue_running_jobs.
  TC-13  e2e STOP: agent stopped, jobs cancelled, branch/worktree removed, durable
         'cancelled', keys tombstoned, notifications fired.
  TC-14  additive DB migration is idempotent (re-init_db) + columns present.
  D7     STOP in a critical merge/deploy window is DEFERRED, then applied by the
         deploy finalizer.
"""
import os
import tempfile

import pytest

os.environ["ORCH_DB_PATH"] = os.path.join(tempfile.gettempdir(), "test_stop_status.db")
os.environ.setdefault("ORCH_GITEA_TOKEN", "test-token")
os.environ.setdefault("ORCH_PLANE_API_TOKEN", "test-token")

import src.db as db  # noqa: E402
from src.db import (  # noqa: E402
    init_db, get_db, claim_next_job, get_task,
    cancel_jobs_for_task, mark_task_cancelled, get_task_by_plane_id,
    requeue_running_jobs, get_job,
)
from src import config as cfg  # noqa: E402
from src import cancel as cancel_mod  # noqa: E402
from src import stage_engine  # noqa: E402


@pytest.fixture(autouse=True)
def fresh_db(tmp_path, monkeypatch):
    dbfile = tmp_path / "stop.db"
    monkeypatch.setattr(db.settings, "db_path", str(dbfile))
    # STOP feature ON, all repos. Isolate repos_dir so the critical-window probe
    # (deploy markers / merge-lease) sees a clean tree by default.
    monkeypatch.setattr(cfg.settings, "stop_status_enabled", True, raising=False)
    monkeypatch.setattr(cfg.settings, "stop_status_repos", "", raising=False)
    monkeypatch.setattr(cfg.settings, "repos_dir", str(tmp_path / "repos"), raising=False)
    monkeypatch.setattr(cfg.settings, "host_repos_dir", str(tmp_path / "repos"), raising=False)
    monkeypatch.setattr(cfg.settings, "serial_gate_enabled", False, raising=False)
    monkeypatch.setattr(cfg.settings, "task_deps_enabled", False, raising=False)
    # Silence network side effects of cancel notifications.
    monkeypatch.setattr("src.stage_engine.plane_add_comment", lambda *a, **k: None, raising=False)
    monkeypatch.setattr("src.notifications.update_task_tracker", lambda *a, **k: None, raising=False)
    init_db()
    yield


# --------------------------------------------------------------------------- helpers
def _make_task(plane_id, work_item_id, stage="development", repo="orchestrator",
               branch=None):
    branch = branch or f"feature/{work_item_id}-slug"
    conn = get_db()
    cur = conn.execute(
        "INSERT INTO tasks (plane_id, work_item_id, repo, branch, stage, plane_issue_id, title) "
        "VALUES (?, ?, ?, ?, ?, ?, ?)",
        (plane_id, work_item_id, repo, branch, stage, plane_id, work_item_id),
    )
    tid = cur.lastrowid
    conn.commit()
    conn.close()
    return tid


def _make_job(task_id, repo="orchestrator", agent="developer", status="running",
              pid=None, run_id=None, attempts=1, max_attempts=2):
    conn = get_db()
    cur = conn.execute(
        "INSERT INTO jobs (agent, repo, task_id, status, pid, run_id, attempts, max_attempts) "
        "VALUES (?, ?, ?, ?, ?, ?, ?, ?)",
        (agent, repo, task_id, status, pid, run_id, attempts, max_attempts),
    )
    jid = cur.lastrowid
    conn.commit()
    conn.close()
    return jid


def _job_status(job_id):
    j = get_job(job_id)
    return j["status"] if j else None


def _stub_full_reset(monkeypatch):
    """Stub the side-effecting cleanup steps (signals / git / gitea) of a full reset."""
    calls = {"stop": [], "worktree": [], "branch": []}
    from src.agents.launcher import launcher

    def _stop(pid, run_id, *, reason="stop"):
        calls["stop"].append((pid, run_id, reason))
        return True
    monkeypatch.setattr(launcher, "stop_process", _stop, raising=True)
    monkeypatch.setattr("src.git_worktree.remove_worktree",
                        lambda repo, branch: calls["worktree"].append((repo, branch)),
                        raising=True)
    monkeypatch.setattr("src.gitea.delete_remote_branch",
                        lambda repo, branch: calls["branch"].append((repo, branch)) or True,
                        raising=True)
    return calls


# =========================================================================== TC-01
@pytest.mark.asyncio
async def test_tc01_stop_routed_and_unknown_is_noop(monkeypatch):
    from src.webhooks import plane as plane_wh

    proj_states = {
        "stop": "STOP-UUID", "to_analyse": "TA-UUID", "approved": "AP-UUID",
        "rejected": "RJ-UUID", "confirm_deploy": None,
    }
    monkeypatch.setattr("src.plane_sync.get_project_states", lambda pid: proj_states)
    seen = []

    async def _stub_stop(data, project_id=""):
        seen.append(data.get("id"))
    monkeypatch.setattr(plane_wh, "handle_stop", _stub_stop)

    # STOP state -> routed to handle_stop.
    await plane_wh.handle_issue_updated({"id": "PL-1", "state": {"id": "STOP-UUID"}}, "proj")
    assert seen == ["PL-1"]

    # A non-STOP state does not route to handle_stop.
    await plane_wh.handle_issue_updated({"id": "PL-2", "state": {"id": "AP-UUID"}}, "proj")
    assert seen == ["PL-1"]

    # Unknown task on the real handler -> no-op, never raises.
    await plane_wh.handle_stop({"id": "does-not-exist"}, "proj")


# =========================================================================== TC-02
def test_tc02_stop_active_agent_by_pid(monkeypatch):
    calls = _stub_full_reset(monkeypatch)
    tid = _make_task("PL-10", "ORCH-310", stage="development")
    _make_job(tid, status="running", pid=4242, run_id=77)

    res = stage_engine.cancel_task(tid)
    assert res["ok"] and not res["deferred"]
    assert calls["stop"] == [(4242, 77, f"STOP cancel task {tid}")]
    assert res["stopped"] == 1


def test_tc02_idle_agent_no_stop(monkeypatch):
    calls = _stub_full_reset(monkeypatch)
    tid = _make_task("PL-11", "ORCH-311", stage="development")
    _make_job(tid, status="queued", pid=None)  # no running process

    res = stage_engine.cancel_task(tid)
    assert res["ok"] and res["stopped"] == 0
    assert calls["stop"] == []


# =========================================================================== TC-03
def test_tc03_jobs_cancelled_and_claim_skips(monkeypatch):
    _stub_full_reset(monkeypatch)
    tid = _make_task("PL-20", "ORCH-320", stage="development")
    jq = _make_job(tid, status="queued")
    jr = _make_job(tid, status="running", pid=None)

    stage_engine.cancel_task(tid)
    assert _job_status(jq) == "cancelled"
    assert _job_status(jr) == "cancelled"
    # claim_next_job selects only status='queued' -> a cancelled job is never claimed.
    assert claim_next_job() is None


def test_tc03_cancel_jobs_helper_only_queued(monkeypatch):
    tid = _make_task("PL-21", "ORCH-321")
    jq = _make_job(tid, status="queued")
    jr = _make_job(tid, status="running", pid=None)
    n = cancel_jobs_for_task(tid, only_queued=True)
    assert n == 1
    assert _job_status(jq) == "cancelled"
    assert _job_status(jr) == "running"  # the running deploy/merge actor is left alone


# =========================================================================== TC-04
def test_tc04_reaper_does_not_requeue_terminal_task(monkeypatch):
    from src.job_reaper import JobReaper
    tid = _make_task("PL-30", "ORCH-330", stage="development")
    jid = _make_job(tid, status="running", pid=999999, attempts=1, max_attempts=2)
    # Task is flipped to cancelled (as STOP would) while the job is still running.
    mark_task_cancelled(tid)

    reaper = JobReaper()
    job = get_job(jid)
    reaper._reap_unknown_outcome(job, reason="dead pid")
    # NOT requeued (attempts<max would normally requeue) -> terminal 'cancelled'.
    assert _job_status(jid) == "cancelled"


# =========================================================================== TC-05
def test_tc05_full_reset_removes_branch_and_worktree(monkeypatch):
    calls = _stub_full_reset(monkeypatch)
    tid = _make_task("PL-40", "ORCH-340", stage="review", branch="feature/ORCH-340-x")

    stage_engine.cancel_task(tid)
    assert calls["worktree"] == [("orchestrator", "feature/ORCH-340-x")]
    assert calls["branch"] == [("orchestrator", "feature/ORCH-340-x")]


def test_tc05_delete_remote_branch_refuses_main():
    from src import gitea
    # main is never deletable by the cancel path (self-hosting safety, NFR-3).
    assert gitea.delete_remote_branch("orchestrator", "main") is False
    assert gitea.delete_remote_branch("orchestrator", "master") is False


# =========================================================================== TC-06
def test_tc06_docs_and_task_row_survive(monkeypatch, tmp_path):
    _stub_full_reset(monkeypatch)
    tid = _make_task("PL-50", "ORCH-350", stage="development")
    # A stand-in docs artefact: cancel must not delete it.
    docs = tmp_path / "docs" / "work-items" / "ORCH-350"
    docs.mkdir(parents=True)
    (docs / "02-trz.md").write_text("trz")

    stage_engine.cancel_task(tid)
    assert (docs / "02-trz.md").exists(), "docs artefacts must be preserved"
    # The task ROW is kept (durable audit), flipped to cancelled.
    assert get_task(tid)["stage"] == "cancelled"


# =========================================================================== TC-07
def test_tc07_idempotent_on_cancelled_done_missing(monkeypatch):
    calls = _stub_full_reset(monkeypatch)
    # already cancelled
    tid = _make_task("PL-60", "ORCH-360", stage="cancelled")
    res = stage_engine.cancel_task(tid)
    assert res["ok"] and res["note"].startswith("already-terminal")
    assert calls["stop"] == [] and calls["branch"] == []
    # done
    tid2 = _make_task("PL-61", "ORCH-361", stage="done")
    res2 = stage_engine.cancel_task(tid2)
    assert res2["note"].startswith("already-terminal")
    # missing
    res3 = stage_engine.cancel_task(999999)
    assert res3["note"] == "no-task"


# =========================================================================== TC-08
def test_tc08_kill_switch_off_inert(monkeypatch):
    monkeypatch.setattr(cfg.settings, "stop_status_enabled", False, raising=False)
    assert cancel_mod.applies("orchestrator") is False


@pytest.mark.asyncio
async def test_tc08_kill_switch_off_handle_stop_noop(monkeypatch):
    monkeypatch.setattr(cfg.settings, "stop_status_enabled", False, raising=False)
    calls = _stub_full_reset(monkeypatch)
    from src.webhooks import plane as plane_wh
    tid = _make_task("PL-70", "ORCH-370", stage="development")
    _make_job(tid, status="running", pid=4242)
    await plane_wh.handle_stop({"id": "PL-70"}, "proj")
    # Nothing was cancelled (kill-switch off -> applies() False -> no-op).
    assert calls["stop"] == []
    assert get_task(tid)["stage"] == "development"


def test_tc08_scope_csv(monkeypatch):
    monkeypatch.setattr(cfg.settings, "stop_status_repos", "enduro-trails", raising=False)
    assert cancel_mod.applies("enduro-trails") is True
    assert cancel_mod.applies("orchestrator") is False


# =========================================================================== TC-09
def test_tc09_queue_has_stop_block_and_keeps_keys(monkeypatch):
    import asyncio
    from src import main
    payload = asyncio.run(main.queue())
    for key in ("counts", "serial_gate", "task_deps", "auto_labels", "recent"):
        assert key in payload, f"existing /queue key '{key}' preserved"
    assert "stop" in payload
    blk = payload["stop"]
    assert blk["enabled"] is True
    assert "repos" in blk and "cancelled_count" in blk and "recent" in blk


def test_tc09_snapshot_never_raises(monkeypatch):
    # Force a DB error inside the snapshot -> minimal dict, no raise.
    monkeypatch.setattr("src.db.cancelled_tasks_snapshot",
                        lambda *a, **k: (_ for _ in ()).throw(RuntimeError("boom")))
    snap = cancel_mod.snapshot()
    assert snap["enabled"] is True and snap["cancelled_count"] == 0


# =========================================================================== TC-10
@pytest.mark.asyncio
async def test_tc10_relaunch_hole_closed_midpipeline(monkeypatch):
    from src.webhooks import plane as plane_wh
    monkeypatch.setattr("src.plane_sync.add_comment", lambda *a, **k: None, raising=False)
    monkeypatch.setattr("src.plane_sync.set_issue_analysis", lambda *a, **k: None, raising=False)
    tid = _make_task("PL-80", "ORCH-380", stage="development")

    await plane_wh.handle_status_start({"id": "PL-80"}, "proj")
    # No stage agent was relaunched (no job created) for a mid-pipeline task.
    conn = get_db()
    n = conn.execute("SELECT COUNT(*) FROM jobs WHERE task_id=?", (tid,)).fetchone()[0]
    conn.close()
    assert n == 0


# =========================================================================== TC-11
@pytest.mark.asyncio
async def test_tc11_analysis_idle_relaunches_analyst(monkeypatch):
    from src.webhooks import plane as plane_wh
    monkeypatch.setattr("src.plane_sync.add_comment", lambda *a, **k: None, raising=False)
    monkeypatch.setattr("src.plane_sync.set_issue_analysis", lambda *a, **k: None, raising=False)
    tid = _make_task("PL-90", "ORCH-390", stage="analysis")

    await plane_wh.handle_status_start({"id": "PL-90"}, "proj")
    conn = get_db()
    rows = conn.execute("SELECT agent FROM jobs WHERE task_id=?", (tid,)).fetchall()
    conn.close()
    assert [r[0] for r in rows] == ["analyst"], "analyst resume is still legitimate"


@pytest.mark.asyncio
async def test_tc11_new_task_starts_pipeline(monkeypatch):
    from src.webhooks import plane as plane_wh
    started = []

    async def _stub_start(data, project_id=""):
        started.append(data.get("id"))
    monkeypatch.setattr(plane_wh, "start_pipeline", _stub_start)
    await plane_wh.handle_status_start({"id": "PL-NEW"}, "proj")
    assert started == ["PL-NEW"]  # the ONLY pipeline-start entry point


# =========================================================================== TC-12
def test_tc12_reconciler_skips_cancelled(monkeypatch):
    from src.reconciler import Reconciler
    # Avoid any Plane network in the gate pass.
    monkeypatch.setattr("src.reconciler.fetch_issue_state",
                        lambda *a, **k: (_ for _ in ()).throw(AssertionError("no net")),
                        raising=False)
    tid = _make_task("PL-100", "ORCH-400", stage="development")
    mark_task_cancelled(tid)
    rec = Reconciler()
    rec.reconcile_gate_once()
    assert rec.skipped_terminal_total == 1


def test_tc12_requeue_running_does_not_revive_cancelled(monkeypatch):
    tid = _make_task("PL-101", "ORCH-401", stage="development")
    jc = _make_job(tid, status="running", pid=None)
    cancel_jobs_for_task(tid)  # -> cancelled
    assert _job_status(jc) == "cancelled"
    # Startup recovery flips only 'running' jobs; a cancelled job is untouched.
    requeue_running_jobs()
    assert _job_status(jc) == "cancelled"


# =========================================================================== TC-13
def test_tc13_end_to_end_stop(monkeypatch):
    calls = _stub_full_reset(monkeypatch)
    tid = _make_task("PL-110", "ORCH-410", stage="review", branch="feature/ORCH-410-e2e")
    jr = _make_job(tid, status="running", pid=5555, run_id=11)
    jq = _make_job(tid, status="queued")

    res = stage_engine.cancel_task(tid, reason="Plane STOP status")
    assert res["ok"] and not res["deferred"]
    # agent stopped
    assert calls["stop"] and calls["stop"][0][0] == 5555
    # jobs cancelled
    assert _job_status(jr) == "cancelled" and _job_status(jq) == "cancelled"
    # worktree + branch removed
    assert calls["worktree"] and calls["branch"]
    # durable terminal + key tombstone (re-create via To Analyse no longer collides)
    t = get_task(tid)
    assert t["stage"] == "cancelled" and t["cancelled_at"]
    assert t["plane_id"].endswith(f"#cancelled-{tid}")
    assert t["work_item_id"].endswith(f"#cancelled-{tid}")
    # plane_issue_id is tombstoned too (the lookup ORs on it) but the original UUID
    # remains recoverable from the parseable suffix (audit link preserved).
    assert t["plane_issue_id"] == f"PL-110#cancelled-{tid}"
    assert t["plane_issue_id"].split("#cancelled-")[0] == "PL-110"
    assert get_task_by_plane_id("PL-110") is None  # freed for a fresh start


# =========================================================================== TC-14
def test_tc14_migration_idempotent_and_columns_present():
    # Re-running init_db must not fail (idempotent _ensure_column).
    init_db()
    init_db()
    conn = get_db()
    cols = {r[1] for r in conn.execute("PRAGMA table_info(tasks)").fetchall()}
    conn.close()
    assert "cancelled_at" in cols and "cancel_requested_at" in cols


def test_tc14_existing_contracts_intact():
    # The additive job status set still has the original statuses working.
    tid = _make_task("PL-120", "ORCH-420")
    jid = _make_job(tid, status="queued")
    # A queued job is still claimable when no gate blocks it.
    claimed = claim_next_job()
    assert claimed is not None and claimed["id"] == jid


# =========================================================================== D7
def test_d7_stop_in_critical_window_defers(monkeypatch):
    calls = _stub_full_reset(monkeypatch)
    from src import self_deploy
    tid = _make_task("PL-130", "ORCH-430", stage="deploy", branch="feature/ORCH-430-d")
    # self-deploy Phase B initiated -> critical window.
    self_deploy.write_marker("orchestrator", "ORCH-430", self_deploy.INITIATED, content="1")
    jq = _make_job(tid, status="queued")
    jr = _make_job(tid, status="running", pid=7777)  # the deploy actor

    res = stage_engine.cancel_task(tid)
    assert res["deferred"] is True and res["ok"]
    # Only queued jobs cancelled; the running deploy actor is NOT killed.
    assert _job_status(jq) == "cancelled"
    assert _job_status(jr) == "running"
    assert calls["stop"] == [] and calls["branch"] == []
    # The deferred flag is durable; the task is NOT yet terminal.
    t = get_task(tid)
    assert t["cancel_requested_at"] and t["stage"] == "deploy"


def test_d7_in_critical_window_detection(monkeypatch):
    from src import self_deploy
    task = {"repo": "orchestrator", "work_item_id": "ORCH-431", "branch": "feature/x"}
    assert cancel_mod.in_critical_window(task) is False
    self_deploy.write_marker("orchestrator", "ORCH-431", self_deploy.INITIATED, content="1")
    assert cancel_mod.in_critical_window(task) is True


def test_d7_lease_held_idle_parking_is_not_critical(monkeypatch):
    """ORCH-090 review P1: a task PARKED on `deploy` awaiting Confirm Deploy holds the
    merge-lease but is fully reversible -> NOT a critical window (else the deferred
    cancel is never applied and the task wedges)."""
    from src import merge_gate
    os.makedirs(cfg.settings.repos_dir, exist_ok=True)
    branch = "feature/ORCH-432-park"
    tid = _make_task("PL-432", "ORCH-432", stage="deploy", branch=branch)
    # Lease HELD by this task's branch, NO INITIATED marker, NO running job.
    acquired, _ = merge_gate.acquire_merge_lease("orchestrator", branch, "ORCH-432")
    assert acquired
    assert merge_gate.current_lease_holder("orchestrator") == branch
    task = get_task(tid)
    assert cancel_mod.in_critical_window(task) is False


def test_d7_lease_held_with_running_actor_still_critical(monkeypatch):
    """Lease held AND a deploy/merge actor actually running -> still critical (defer)."""
    from src import merge_gate
    os.makedirs(cfg.settings.repos_dir, exist_ok=True)
    branch = "feature/ORCH-433-merge"
    tid = _make_task("PL-433", "ORCH-433", stage="deploy", branch=branch)
    merge_gate.acquire_merge_lease("orchestrator", branch, "ORCH-433")
    _make_job(tid, status="running", pid=9191)  # the merge/deploy actor
    task = get_task(tid)
    assert cancel_mod.in_critical_window(task) is True


def test_d7_stop_on_deploy_awaiting_confirm_full_resets(monkeypatch):
    """End-to-end of the P1 fix: STOP while parked on `deploy` awaiting Confirm Deploy
    -> immediate FULL reset (terminal cancelled, branch deleted, lease released)."""
    calls = _stub_full_reset(monkeypatch)
    from src import merge_gate
    os.makedirs(cfg.settings.repos_dir, exist_ok=True)
    branch = "feature/ORCH-434-park"
    tid = _make_task("PL-434", "ORCH-434", stage="deploy", branch=branch)
    merge_gate.acquire_merge_lease("orchestrator", branch, "ORCH-434")

    res = stage_engine.cancel_task(tid)

    assert res["ok"] and not res["deferred"]
    assert res["note"] == "cancelled"
    # Durable terminal + branch deleted -> repo no longer wedged.
    assert get_task(tid)["stage"] == "cancelled"
    assert calls["branch"], "full reset deletes the remote feature branch"
    # The held lease was released (step 3c) -> the repo's serial-gate is unblocked.
    assert merge_gate.current_lease_holder("orchestrator") is None


def test_d7_repeated_stop_in_critical_window_no_duplicate_notify(monkeypatch):
    """AC-6 / P2: a repeated STOP while still deferred does not re-notify."""
    _stub_full_reset(monkeypatch)
    from src import self_deploy
    notifies = []
    monkeypatch.setattr(stage_engine, "_notify_cancel",
                        lambda *a, **k: notifies.append(a), raising=True)
    tid = _make_task("PL-435", "ORCH-435", stage="deploy", branch="feature/ORCH-435-d")
    self_deploy.write_marker("orchestrator", "ORCH-435", self_deploy.INITIATED, content="1")

    r1 = stage_engine.cancel_task(tid)
    r2 = stage_engine.cancel_task(tid)
    assert r1["deferred"] and r1["note"] == "deferred-critical-window"
    assert r2["deferred"] and r2["note"] == "deferred-already-pending"
    assert len(notifies) == 1, "only the first deferral transition notifies"


def test_d7_deferred_applied_by_finalizer(monkeypatch):
    """After the irreversible step finishes, the finalizer applies the deferred cancel."""
    calls = _stub_full_reset(monkeypatch)
    tid = _make_task("PL-140", "ORCH-440", stage="development", branch="feature/ORCH-440-d")
    # Mark a deferred cancellation pending (as the critical-window path would).
    db.set_task_cancel_requested(tid)

    # force=True is what run_deploy_finalizer uses once the step completed honestly.
    res = stage_engine.cancel_task(tid, force=True, source="deferred")
    assert res["ok"] and not res["deferred"]
    assert get_task(tid)["stage"] == "cancelled"
    assert calls["branch"], "deferred cancel applies the full reset"