"""Integration: the room HTTP surface (`routes_rooms.py`) over a live
in-process app.

Covers the three endpoints — `POST /api/rooms` (201 + the once-returned
server-minted token), `GET /api/rooms/{code}`, `POST /api/rooms/{code}/join` —
plus the named refusals (`room_full` 503 for a full room *and* a full
process, `room_closed` 410, `room_not_found` 404 for a malformed *or*
unknown code: the two must stay indistinguishable, US-02 criterion 4),
no-token-leakage for other players, name sanitization at the boundary, and
`/healthz`'s live room count. Time-dependent tests swap the app's
supervisor for one on a `FakeClock` *before* the TestClient's lifespan runs.
"""

from __future__ import annotations

import asyncio
from pathlib import Path
from typing import Any

import pytest
from fastapi import FastAPI
from fastapi.testclient import TestClient

from undercooked.config import Settings
from undercooked.server.app import create_app
from undercooked.server.clock import FakeClock
from undercooked.server.codes import CROCKFORD
from undercooked.server.rooms import RoomSupervisor
from undercooked.server.sessions import new_session

pytestmark = pytest.mark.integration

#: The test-isolated content dir (a recipe book, no levels) — explicit, so
#: the app never reads the shipped `levels/` implicitly.
FIXTURE_LEVELS_DIR = Path(__file__).resolve().parents[1] / "fixtures" / "levels"


def make_app(**settings_overrides: Any) -> FastAPI:
    settings = Settings(levels_dir=FIXTURE_LEVELS_DIR, **settings_overrides)
    return create_app(settings)


class FakeClockSupervisorApp:
    """An app whose supervisor runs on a `FakeClock`.

    Built by swapping `app.state.supervisor` *before* the TestClient's
    lifespan runs `supervisor.start()`; the lifespan then starts (and later
    shuts down) the fake-clock supervisor, so GC is drivable without sleeps.
    """

    def __init__(self, **settings_overrides: Any) -> None:
        self.app = make_app(**settings_overrides)
        self.clock = FakeClock()
        self.app.state.supervisor = RoomSupervisor(
            self.app.state.settings, self.clock, self.app.state.content
        )


def create_room(client: TestClient, name: str | None = None) -> dict[str, Any]:
    response = client.post("/api/rooms", json={"name": name} if name is not None else {})
    assert response.status_code == 201, response.text
    return response.json()


def join_room(
    client: TestClient, code: str, token: str, name: str | None = None
) -> tuple[int, dict[str, Any]]:
    body: dict[str, Any] = {"token": token}
    if name is not None:
        body["name"] = name
    response = client.post(f"/api/rooms/{code}/join", json=body)
    return response.status_code, response.json()


# ---------------------------------------------------------------------- create


def test_create_room_returns_201_with_a_crockford_code_seats_and_you() -> None:
    with TestClient(make_app()) as client:
        body = create_room(client, "Ada")

    assert len(body["room_code"]) == 5
    assert set(body["room_code"]) <= set(CROCKFORD)
    assert body["state"] == "lobby"
    assert body["seats"] == [
        {"index": 0, "name": "Ada", "host": True, "connected": True}
    ]
    assert len(body["you"]["token"]) == 32  # token_urlsafe(24): 24 bytes, base64url
    assert body["you"]["seat"] == 0
    assert body["you"]["host"] is True


def test_create_room_with_no_name_defaults_to_cook_1() -> None:
    with TestClient(make_app()) as client:
        body = create_room(client)
    assert body["seats"][0]["name"] == "Cook #1"


def test_create_room_sanitizes_the_name_at_the_boundary() -> None:
    with TestClient(make_app()) as client:
        body = client.post(
            "/api/rooms", json={"name": "  A<>d\x01a   B\n"}
        ).json()
    assert body["seats"][0]["name"] == "Ada B"

    with TestClient(make_app()) as client:
        body = client.post(
            "/api/rooms", json={"name": "A" * 40}
        ).json()
    assert body["seats"][0]["name"] == "A" * 16  # the 16-char cap


def test_create_room_without_any_body_is_the_bare_curl_criterion() -> None:
    """The phase's completion criterion: `curl -X POST /api/rooms`
    (no JSON body at all) must not 422 — it reads as no name, no
    token (a server-minted token, the `Cook #1` default)."""
    with TestClient(make_app()) as client:
        response = client.post("/api/rooms")
    assert response.status_code == 201, response.text
    body = response.json()
    assert body["seats"] == [
        {"index": 0, "name": "Cook #1", "host": True, "connected": True}
    ]
    assert len(body["you"]["token"]) == 32


def test_create_room_at_process_capacity_is_503_room_full() -> None:
    with TestClient(make_app(max_rooms=1)) as client:
        assert create_room(client)["room_code"]
        response = client.post("/api/rooms", json={})
    assert response.status_code == 503
    assert response.json() == {"code": "room_full"}


def test_create_room_rejects_malformed_bodies() -> None:
    with TestClient(make_app()) as client:
        assert client.post("/api/rooms", json={"name": "Ada", "extra": 1}).status_code == 422
        assert client.post("/api/rooms", json={"n": "Ada"}).status_code == 422


# ------------------------------------------------------------------------ get


def test_get_room_shows_seats_without_any_tokens() -> None:
    with TestClient(make_app()) as client:
        code = create_room(client, "Ada")["room_code"]
        body = client.get(f"/api/rooms/{code.lower()}").json()  # normalized

    assert body["room_code"] == code
    assert body["state"] == "lobby"
    assert len(body["seats"]) == 1
    assert set(body["seats"][0]) == {"index", "name", "host", "connected"}
    assert "token" not in body["seats"][0]
    assert body["you"] is None  # no caller identity exists in a GET


def test_get_unknown_and_malformed_codes_are_indistinguishable() -> None:
    """US-02 criterion 4: `ZZZZZ` (unknown) and `!!!` (malformed) must
    produce the *same* response, so the API is not a room-existence oracle."""
    with TestClient(make_app()) as client:
        unknown = client.get("/api/rooms/ZZZZZ")
        malformed = client.get("/api/rooms/!!!")
    assert unknown.status_code == 404
    assert malformed.status_code == 404
    assert unknown.json() == malformed.json() == {"code": "room_not_found"}


# ----------------------------------------------------------------------- join


def test_join_seats_the_player_in_the_next_seat_and_hides_other_tokens() -> None:
    with TestClient(make_app()) as client:
        code = create_room(client, "Ada")["room_code"]
        status, body = join_room(client, code, "tok-bob", "Bob")

    assert status == 200
    assert body["you"] == {"token": "tok-bob", "seat": 1, "host": False}
    assert [seat["name"] for seat in body["seats"]] == ["Ada", "Bob"]
    for seat in body["seats"]:
        assert "token" not in seat
    blob = str(body["seats"])
    assert "tok-bob" not in blob  # never in the *other* players' views


def test_join_rejoin_is_idempotent_and_keeps_the_seat() -> None:
    with TestClient(make_app()) as client:
        code = create_room(client, "Ada")["room_code"]
        status_first, body_first = join_room(client, code, "tok-bob", "Bob")
        status_second, body_second = join_room(client, code, "tok-bob")

    assert status_first == 200 and status_second == 200
    assert body_second["you"]["seat"] == body_first["you"]["seat"] == 1
    assert len(body_second["seats"]) == 2  # no second seat was minted


def test_join_updates_the_name_only_when_one_is_typed() -> None:
    with TestClient(make_app()) as client:
        code = create_room(client, "Ada")["room_code"]
        join_room(client, code, "tok-bob", "Bob")
        status, body = join_room(client, code, "tok-bob", "Robert")
        assert status == 200
        assert body["seats"][1]["name"] == "Robert"
        status, body = join_room(client, code, "tok-bob")
        assert status == 200
        assert body["seats"][1]["name"] == "Robert"  # untouched on rejoin


def test_join_a_full_room_is_503_room_full() -> None:
    with TestClient(make_app(max_players=1)) as client:
        code = create_room(client, "Ada")["room_code"]
        status, body = join_room(client, code, "tok-bob", "Bob")
    assert status == 503
    assert body == {"code": "room_full"}


def test_join_a_closed_room_is_410_room_closed() -> None:
    """Close the room *before* the app starts (no tick task exists yet, so
    the close happens in this test's own loop — never across the TestClient's
    portal loop), then watch the API report the closed room until the GC
    pass would drop it."""
    fixture = FakeClockSupervisorApp()
    session = new_session("Ada", fixture.clock)
    room = fixture.app.state.supervisor.create_room(session, "Ada")
    asyncio.run(fixture.app.state.supervisor.close_room(room.code))

    with TestClient(fixture.app) as client:
        inspect = client.get(f"/api/rooms/{room.code}")
        assert inspect.status_code == 200  # still in the registry
        assert inspect.json()["state"] == "closed"
        status, body = join_room(client, room.code, "tok-bob", "Bob")
    assert status == 410
    assert body == {"code": "room_closed"}

    with TestClient(fixture.app) as client:  # after shutdown the room is gone
        assert client.get(f"/api/rooms/{room.code}").status_code == 404


def test_join_unknown_and_malformed_codes_are_indistinguishable() -> None:
    with TestClient(make_app()) as client:
        unknown = client.post("/api/rooms/ZZZZZ/join", json={"token": "tok"})
        malformed = client.post("/api/rooms/!!!/join", json={"token": "tok"})
    assert unknown.status_code == 404
    assert malformed.status_code == 404
    assert unknown.json() == malformed.json() == {"code": "room_not_found"}


def test_join_rejects_malformed_bodies() -> None:
    with TestClient(make_app()) as client:
        code = create_room(client)["room_code"]
        assert client.post(f"/api/rooms/{code}/join", json={"n": "tok"}).status_code == 422
        assert (
            client.post(f"/api/rooms/{code}/join", json={"token": ""}).status_code == 422
        )
        assert (
            client.post(
                f"/api/rooms/{code}/join", json={"token": "tok", "extra": 1}
            ).status_code
            == 422
        )


def test_join_moves_a_token_between_rooms() -> None:
    with TestClient(make_app()) as client:
        code_a = create_room(client, "Ada")["room_code"]
        code_b = create_room(client, "Bob")["room_code"]
        status, _ = join_room(client, code_a, "tok-ada2", "Ada2")
        assert status == 200
        status, body = join_room(client, code_b, "tok-ada2")
        assert status == 200
        assert body["you"]["seat"] == 1  # seated in room B
        room_a = client.get(f"/api/rooms/{code_a}").json()
    assert len(room_a["seats"]) == 1  # the token was evicted from room A


def test_healthz_reports_the_live_room_count() -> None:
    with TestClient(make_app()) as client:
        assert client.get("/healthz").json()["rooms"] == 0
        create_room(client, "Ada")
        create_room(client, "Bob")
        body = client.get("/healthz").json()
    assert body["status"] == "ok"
    assert body["rooms"] == 2