# Copyright (c) 2026 Krzysztof Rudnicki. MIT licence.
"""The fake server's group endpoints, including the join the bot self-heals with."""

from __future__ import annotations

import pytest
from fastapi.testclient import TestClient

from fake_signal.server import create_app
from fake_signal.state import State

NUMBER = "+15550001234"
GROUP = "group.first=="
INTERNAL = "first=="


@pytest.fixture
def state() -> State:
    return State(base_url="http://testserver", accounts=[NUMBER])


@pytest.fixture
def client(state: State) -> TestClient:
    return TestClient(create_app(state))


def _entry(group_id: str, *, member: bool = True, joinable: bool = True) -> dict[str, object]:
    return {
        "id": group_id,
        "internal_id": INTERNAL,
        "name": "g",
        "member": member,
        "joinable": joinable,
    }


def test_groups_require_a_registered_account(client: TestClient) -> None:
    assert client.get("/v1/groups/+15559999999").status_code == 400


def test_adding_groups_keeps_the_existing_ones(client: TestClient) -> None:
    """Replacing instead of adding would delete state a later scenario needs."""
    client.post("/_control/groups", json=[_entry(GROUP)])
    client.post("/_control/groups/add", json=[_entry("group.second==")])
    listed = client.get(f"/v1/groups/{NUMBER}").json()
    assert [g["id"] for g in listed] == [GROUP, "group.second=="]


def test_adding_a_group_twice_does_not_duplicate_it(client: TestClient) -> None:
    client.post("/_control/groups", json=[_entry(GROUP)])
    assert client.post("/_control/groups/add", json=[_entry(GROUP)]).json() == {"groups": 1}


def test_join_requires_a_registered_account(client: TestClient) -> None:
    assert client.post(f"/v1/groups/+15559999999/{GROUP}/join").status_code == 400


def test_join_turns_an_invitation_into_membership(client: TestClient) -> None:
    client.post("/_control/groups", json=[_entry(GROUP, member=False)])
    assert client.post(f"/v1/groups/{NUMBER}/{GROUP}/join").status_code == 201
    assert client.get(f"/v1/groups/{NUMBER}").json()[0]["member"] is True


def test_join_answers_201_even_when_it_changed_nothing(client: TestClient) -> None:
    """The real endpoint does too, which is why the bot re-reads the listing."""
    client.post("/_control/groups", json=[_entry(GROUP, member=False, joinable=False)])
    assert client.post(f"/v1/groups/{NUMBER}/{GROUP}/join").status_code == 201
    assert client.get(f"/v1/groups/{NUMBER}").json()[0]["member"] is False