"""Тесты: лимиты (группа/партия), правка партии админом, переименование фракции, фильтры."""
from __future__ import annotations

from fastapi.testclient import TestClient

from tests.conftest import add_group_member, create_finished_match, csrf_headers, login, start_match


def _exp_id(client: TestClient, code: str) -> int:
    return next(e["id"] for e in client.get("/api/expansions").json() if e["code"] == code)


def _admin_login(client: TestClient, make_admin) -> None:
    make_admin("admin", "secret123")
    r = client.post(
        "/api/admin/auth/login",
        json={"username": "admin", "password": "secret123"},
        headers=csrf_headers(client),
    )
    assert r.status_code == 200, r.text


def test_group_invite_capacity_limit(client: TestClient):
    login(client, "Owner")
    gid = client.post(
        "/api/groups", json={"name": "Большая", "expansion_ids": []}, headers=csrf_headers(client)
    ).json()["id"]
    for i in range(1, 11):
        client.post("/api/auth/dev/users", json={"nickname": f"U{i}"}, headers=csrf_headers(client))
    statuses = []
    for i in range(1, 11):
        r = client.post(
            f"/api/groups/{gid}/invitations", json={"nickname": f"U{i}"}, headers=csrf_headers(client)
        )
        statuses.append(r.status_code)
    # owner(1) + 9 приглашений = 10 (лимит мест); 10-е приглашение сверх лимита → 409.
    assert statuses[:9] == [200] * 9
    assert statuses[9] == 409


def test_match_player_limit(client: TestClient, engine):
    me = login(client, "Owner")
    fw, fv = _exp_id(client, "forgotten_worlds"), _exp_id(client, "forsaken_voids")
    gid = client.post(
        "/api/groups", json={"name": "Группа", "expansion_ids": [fw, fv]}, headers=csrf_headers(client)
    ).json()["id"]
    ids = [me["id"]]
    for i in range(1, 7):
        ids.append(add_group_member(engine, gid, f"P{i}"))
    factions = client.get(f"/api/groups/{gid}/factions").json()
    fids = [f["id"] for f in factions]
    # 7 игроков на старте → 422 (максимум 6).
    roster = [{"user_id": uid, "faction_id": fids[i]} for i, uid in enumerate(ids)]
    r = start_match(client, gid, roster)
    assert r.status_code == 422
    assert "6" in r.json()["error"]["message"]


def test_admin_edit_match_and_filters(client: TestClient, make_admin, engine):
    me = login(client, "Аня")
    gid = client.post(
        "/api/groups", json={"name": "Группа", "expansion_ids": []}, headers=csrf_headers(client)
    ).json()["id"]
    b = add_group_member(engine, gid, "Боря")
    factions = {f["code"]: f["id"] for f in client.get(f"/api/groups/{gid}/factions").json()}
    mid = create_finished_match(
        client,
        gid,
        [
            {"user_id": me["id"], "faction_id": factions["orks"], "place": 1},
            {"user_id": b, "faction_id": factions["eldar"], "place": 2},
        ],
    )["id"]

    _admin_login(client, make_admin)

    # Фильтры: по игроку и по фракции находят партию.
    assert any(m["id"] == mid for m in client.get(f"/api/admin/matches?user_id={b}").json())
    assert any(
        m["id"] == mid for m in client.get(f"/api/admin/matches?faction_id={factions['orks']}").json()
    )

    # Правка: меняем фракцию Бори eldar → chaos.
    r = client.patch(
        f"/api/admin/matches/{mid}",
        json={
            "participants": [
                {"user_id": me["id"], "faction_id": factions["orks"], "place": 1},
                {"user_id": b, "faction_id": factions["chaos"], "place": 2},
            ]
        },
        headers=csrf_headers(client),
    )
    assert r.status_code == 200, r.text
    detail = client.get(f"/api/admin/matches/{mid}").json()
    bp = next(p for p in detail["participants"] if p["user_id"] == b)
    assert bp["faction_name"] == "Хаоситы"


def test_admin_rename_account(client: TestClient, make_admin):
    """Админ переименовывает аккаунт: валидируется формат и уникальность ника."""
    a = login(client, "Старое")
    client.post("/api/auth/dev/users", json={"nickname": "Занятое"}, headers=csrf_headers(client))
    _admin_login(client, make_admin)

    r = client.patch(
        f"/api/admin/users/{a['id']}", json={"nickname": "Новое"}, headers=csrf_headers(client)
    )
    assert r.status_code == 200, r.text
    assert r.json()["nickname"] == "Новое"

    # Занятый ник → 409, некорректный формат → 422.
    r = client.patch(
        f"/api/admin/users/{a['id']}", json={"nickname": "Занятое"}, headers=csrf_headers(client)
    )
    assert r.status_code == 409 and r.json()["error"]["code"] == "NICKNAME_TAKEN", r.text
    r = client.patch(
        f"/api/admin/users/{a['id']}", json={"nickname": "x"}, headers=csrf_headers(client)
    )
    assert r.status_code == 422, r.text


def test_dev_delete_account_keeps_matches(client: TestClient, make_admin, engine):
    """DEV-удаление: аккаунт удаляется, партии живут (игрок вычёркивается),
    его созданные партии и группы переназначаются на админа."""
    me = login(client, "Аня")  # владелец группы и создатель партии
    gid = client.post(
        "/api/groups", json={"name": "Группа", "expansion_ids": []}, headers=csrf_headers(client)
    ).json()["id"]
    b = add_group_member(engine, gid, "Боря")
    factions = {f["code"]: f["id"] for f in client.get(f"/api/groups/{gid}/factions").json()}
    mid = create_finished_match(
        client,
        gid,
        [
            {"user_id": me["id"], "faction_id": factions["orks"], "place": 1},
            {"user_id": b, "faction_id": factions["eldar"], "place": 2},
        ],
    )["id"]

    admin_id = make_admin("admin", "secret123")
    r = client.post(
        "/api/admin/auth/login",
        json={"username": "admin", "password": "secret123"},
        headers=csrf_headers(client),
    )
    assert r.status_code == 200, r.text

    # Удаляем участника Борю → партия жива, его строка участия вычеркнута.
    r = client.delete(f"/api/admin/dev/users/{b}", headers=csrf_headers(client))
    assert r.status_code == 200, r.text
    assert all(u["id"] != b for u in client.get("/api/admin/users").json())
    detail = client.get(f"/api/admin/matches/{mid}").json()
    assert [p["user_id"] for p in detail["participants"]] == [me["id"]]  # Боря вычеркнут
    assert detail["player_count"] == 2  # player_count НЕ пересчитывается (осознанно)

    # Удаляем создателя/владельца Аню → партия и группа сохраняются, переходят к админу.
    r = client.delete(f"/api/admin/dev/users/{me['id']}", headers=csrf_headers(client))
    assert r.status_code == 200, r.text
    assert client.get(f"/api/admin/matches/{mid}").json()["created_by"] == admin_id
    grp = next(g for g in client.get("/api/admin/groups").json() if g["id"] == gid)
    assert grp["owner_id"] == admin_id


def test_dev_delete_account_rejects_admin(client: TestClient, make_admin):
    """Админа удалить нельзя."""
    admin_id = make_admin("admin", "secret123")
    r = client.post(
        "/api/admin/auth/login",
        json={"username": "admin", "password": "secret123"},
        headers=csrf_headers(client),
    )
    assert r.status_code == 200, r.text
    r = client.delete(f"/api/admin/dev/users/{admin_id}", headers=csrf_headers(client))
    assert r.status_code == 422, r.text


def test_admin_rename_faction_system_wide(client: TestClient, make_admin, engine):
    me = login(client, "Кто-то")
    gid = client.post(
        "/api/groups", json={"name": "Группа", "expansion_ids": []}, headers=csrf_headers(client)
    ).json()["id"]
    b = add_group_member(engine, gid, "Друг")
    factions = {f["code"]: f["id"] for f in client.get(f"/api/groups/{gid}/factions").json()}
    mid = create_finished_match(
        client,
        gid,
        [
            {"user_id": me["id"], "faction_id": factions["orks"], "place": 1},
            {"user_id": b, "faction_id": factions["eldar"], "place": 2},
        ],
    )["id"]

    _admin_login(client, make_admin)
    r = client.patch(
        f"/api/admin/factions/{factions['orks']}",
        json={"name_ru": "Орки WAAAGH"},
        headers=csrf_headers(client),
    )
    assert r.status_code == 200, r.text

    # Изменение отражается в существующей партии (имя хранится один раз).
    detail = client.get(f"/api/admin/matches/{mid}").json()
    ap = next(p for p in detail["participants"] if p["user_id"] == me["id"])
    assert ap["faction_name"] == "Орки WAAAGH"


def test_admin_delete_group_with_matches_is_conflict(client: TestClient, make_admin, engine):
    """Группу с партиями удалять нельзя — но ответ должен быть внятным 409.

    Регрессия: matches.group_id — ON DELETE RESTRICT, и голый session.delete ронял
    IntegrityError наружу пятисоткой без конверта ошибки."""
    me = login(client, "Owner")
    gid = client.post(
        "/api/groups", json={"name": "Группа", "expansion_ids": []}, headers=csrf_headers(client)
    ).json()["id"]
    p2 = add_group_member(engine, gid, "Игрок2")
    fids = [f["id"] for f in client.get(f"/api/groups/{gid}/factions").json()]
    create_finished_match(
        client, gid,
        [
            {"user_id": me["id"], "faction_id": fids[0], "place": 1},
            {"user_id": p2, "faction_id": fids[1], "place": 2},
        ],
    )

    _admin_login(client, make_admin)
    r = client.delete(f"/api/admin/groups/{gid}", headers=csrf_headers(client))
    assert r.status_code == 409, r.text
    assert client.get("/api/admin/groups").status_code == 200


def test_last_owner_cannot_demote_self(client: TestClient, engine):
    """Единственный владелец не может разжаловать сам себя.

    Регрессия: change_role не проверял последнего владельца (в отличие от удаления),
    и группа оставалась без владельца навсегда — назначить нового было некому."""
    me = login(client, "Owner")
    gid = client.post(
        "/api/groups", json={"name": "Группа", "expansion_ids": []}, headers=csrf_headers(client)
    ).json()["id"]
    add_group_member(engine, gid, "Игрок2")

    r = client.patch(
        f"/api/groups/{gid}/members/{me['id']}",
        json={"role": "member"},
        headers=csrf_headers(client),
    )
    assert r.status_code == 403, r.text
    members = client.get(f"/api/groups/{gid}/members").json()
    assert any(m["user_id"] == me["id"] and m["role"] == "owner" for m in members)