"""Integration: the librarian -> bot RESULT delivery contract.

A search that 'vanishes' (watchdog fires "zeżarło") means the result never
reached the bot's inbound queue. These tests pin down the contract so we can
tell a CODE break (wrong shape / uuid / auth handling) from a TRANSPORT break
(the librarian can't reach the bot at all - wrong address/port). They prove the
bot side is correct end to end, which isolates a systematic vanish to transport.

The result the librarian sends is exactly:
    {uuid: {DOI: {"Title": [<title>...], "type": <str>}}}
(see conjurer_librarian.answer_query -> final_result, POSTed to /conjurer).
"""
import threading
import time

import pytest

import communication_subroutine as cs


def _drain(queue):
    while not queue.empty():
        queue.get()


@pytest.fixture
def comm_threads():
    cs.awaiting_q.clear()
    _drain(cs.incoming_q)
    _drain(cs.OUT_COMM_Q)
    _drain(cs.IN_COMM_Q)
    cs.API_KEY = None
    stop = threading.Event()
    workers = [
        threading.Thread(target=cs.scan_queue, kwargs={"stop_event": stop}, daemon=True),
        threading.Thread(target=cs.scan_incoming, kwargs={"stop_event": stop}, daemon=True),
    ]
    for worker in workers:
        worker.start()
    yield
    stop.set()
    for worker in workers:
        worker.join(timeout=3)


def _dispatch(uuid, query="kwas foliowy"):
    """Mimic the bot dispatching a search: a QueryControl enters the comm queue
    and scan_queue moves it into awaiting_q."""
    qc = cs.QueryControl("siara", uuid, query, None)
    cs.OUT_COMM_Q.put(qc)
    deadline = time.time() + 2
    while time.time() < deadline:
        if any(getattr(r, "uuid", None) == uuid for r in list(cs.awaiting_q)):
            return qc
        time.sleep(0.01)
    raise AssertionError("scan_queue never moved the query into awaiting_q")


# The exact result the librarian emits for one found DOI.
def _result_payload(uuid):
    return {uuid: {"10.1000/xyz": {"Title": ["A Real Paper"], "type": "journal-article"}}}


def test_librarian_result_reaches_bot_when_transport_is_fine(comm_threads):
    _dispatch("uuid-ok")
    client = cs.app.test_client()

    resp = client.post("/conjurer", json=_result_payload("uuid-ok"))

    assert resp.status_code == 200
    got = cs.IN_COMM_Q.get(timeout=3)
    assert got.uuid == "uuid-ok"
    assert got.stop is True
    # Exactly the shape check_data_q renders: entries[DOI]["Title"][0] / ["type"].
    assert got.entries == {"10.1000/xyz": {"Title": ["A Real Paper"], "type": "journal-article"}}


def test_empty_result_is_still_delivered_not_vanished(comm_threads):
    # A search that found nothing sends {uuid: {}} - it must STILL be delivered
    # (renders "niestety nie ma nic"), never look like a lost result.
    _dispatch("uuid-empty")
    client = cs.app.test_client()

    resp = client.post("/conjurer", json={"uuid-empty": {}})

    assert resp.status_code == 200
    got = cs.IN_COMM_Q.get(timeout=3)
    assert got.uuid == "uuid-empty"
    assert got.entries == {}


def test_wrong_api_key_rejects_result_so_it_vanishes(comm_threads):
    # (b) reproduction: if the librarian's CONJURER_API_KEY differs from the
    # bot's, /conjurer returns 401 and the result is never queued - the search
    # silently vanishes exactly as reported.
    cs.API_KEY = "bot-secret"
    _dispatch("uuid-auth")
    client = cs.app.test_client()

    resp = client.post(
        "/conjurer",
        json=_result_payload("uuid-auth"),
        headers={"X-Conjurer-Api-Key": "librarian-DIFFERENT-key"},
    )

    assert resp.status_code == 401
    time.sleep(0.4)
    assert cs.IN_COMM_Q.empty()  # nothing delivered


def test_uuid_mismatch_orphans_result_away_from_the_querent(comm_threads):
    # (b) reproduction: if the uuid the librarian echoes back doesn't byte-match
    # what the bot stored, scan_incoming can't match it -> it goes to the orphan
    # path (posted to the fallback channel, NOT the querent) and the querent's
    # pending entry is never cleared, so the watchdog still flags it lost.
    _dispatch("uuid-stored")
    client = cs.app.test_client()

    client.post("/conjurer", json=_result_payload("uuid-DIFFERENT"))

    got = cs.IN_COMM_Q.get(timeout=3)
    assert got.author == "Orphaned"
    assert got.uuid == "uuid-DIFFERENT"
    # The original querent's record is untouched (still awaiting) - it "vanished".
    assert any(getattr(r, "uuid", None) == "uuid-stored" for r in list(cs.awaiting_q))