"""Tests for POST /api/worlds/{id}/join.

The happy path spawns a real Godot process, so it's covered by a manual /
checkpoint integration test, not here. These cover the envelope: auth,
visibility, and the 503 when orchestration is disabled (the default).
"""

import pytest
from fastapi.testclient import TestClient

from app.main import app


def _auth(client: TestClient, name: str) -> tuple[dict, int]:
    r = client.post("/api/auth/register", json={
        "username": name, "email": f"{name}@e.com", "password": "secret123", "date_of_birth": "1990-01-01",
    })
    assert r.status_code == 201, r.text
    headers = {"Authorization": f"Bearer {r.json()['access_token']}"}
    me = client.get("/api/users/me", headers=headers)
    return headers, me.json()["id"]


def _make_world(client: TestClient, headers: dict, visibility: str = "public") -> int:
    r = client.post("/api/worlds/", headers=headers, json={"name": "W", "visibility": visibility})
    assert r.status_code == 201, r.text
    return r.json()["id"]


class TestJoinWorld:
    def test_requires_auth(self):
        client = TestClient(app)
        assert client.post("/api/worlds/1/join").status_code == 401

    def test_unknown_world_is_404(self):
        client = TestClient(app)
        headers, _ = _auth(client, "join_404")
        assert client.post("/api/worlds/999999/join", headers=headers).status_code == 404

    def test_private_world_of_another_user_is_404(self):
        client = TestClient(app)
        owner_headers, _ = _auth(client, "join_owner")
        wid = _make_world(client, owner_headers, "private")
        other_headers, _ = _auth(client, "join_other")
        assert client.post(f"/api/worlds/{wid}/join", headers=other_headers).status_code == 404

    def test_disabled_orchestration_returns_503(self):
        # GAME_SERVERS_ENABLED defaults to False in tests.
        client = TestClient(app)
        headers, _ = _auth(client, "join_503")
        wid = _make_world(client, headers, "public")
        r = client.post(f"/api/worlds/{wid}/join", headers=headers)
        assert r.status_code == 503
        assert "not enabled" in r.json()["detail"]