"""Уведомления: сервис (create/list/mark_read/purge) и триггеры (инвайт, старт/финиш партии)."""
from __future__ import annotations

from datetime import datetime, timedelta, timezone

from fastapi.testclient import TestClient
from sqlmodel import Session

from app.models import Notification, User
from app.services import notification_service
from tests.conftest import (
    add_group_member,
    csrf_headers,
    finish_match,
    login,
    start_match,
)


def _group(client: TestClient, name: str = "Группа") -> int:
    return client.post(
        "/api/groups", json={"name": name, "expansion_ids": []}, headers=csrf_headers(client)
    ).json()["id"]


def _dev_user(client: TestClient, nick: str) -> None:
    client.post("/api/auth/dev/users", json={"nickname": nick}, headers=csrf_headers(client))


def _make_user(engine, nick: str) -> int:
    with Session(engine) as s:
        u = User(nickname=nick, role="player", auth_provider="stub")
        s.add(u)
        s.commit()
        s.refresh(u)
        return u.id  # type: ignore[return-value]


# ─── Сервис ────────────────────────────────────────────────────────────────────

def test_create_list_mark_read(engine):
    uid = _make_user(engine, "Алиса")
    with Session(engine) as s:
        notification_service.create(s, uid, type="test", title="Привет", link="/account")
        data = notification_service.list_for_user(s, uid)
        assert data["unread_count"] == 1
        assert len(data["items"]) == 1
        assert data["items"][0]["title"] == "Привет"
        assert data["items"][0]["link"] == "/account"
        assert data["items"][0]["read_at"] is None

        marked = notification_service.mark_read(s, uid)
        assert marked == 1
        after = notification_service.list_for_user(s, uid)
        assert after["unread_count"] == 0
        assert after["items"][0]["read_at"] is not None


def test_purge_expired(engine):
    uid = _make_user(engine, "Боб")
    with Session(engine) as s:
        n = Notification(user_id=uid, type="test", title="Старое")
        s.add(n)
        s.commit()
        s.refresh(n)
        # Состарим запись за пределы окна хранения.
        n.created_at = datetime.now(timezone.utc).replace(tzinfo=None) - timedelta(
            hours=notification_service.RETENTION_HOURS + 1
        )
        s.add(n)
        s.commit()

        removed = notification_service.purge_expired(s)
        assert removed == 1
        assert notification_service.list_for_user(s, uid)["items"] == []


def test_notifications_require_auth(client: TestClient):
    assert client.get("/api/notifications").status_code == 401


# ─── Триггеры через HTTP ─────────────────────────────────────────────────────────

def test_invitation_creates_notification(client: TestClient):
    login(client, "Овнер")
    gid = _group(client)
    _dev_user(client, "Гость")
    r = client.post(
        f"/api/groups/{gid}/invitations", json={"nickname": "Гость"}, headers=csrf_headers(client)
    )
    assert r.status_code == 200, r.text

    login(client, "Гость")
    data = client.get("/api/notifications").json()
    invites = [n for n in data["items"] if n["type"] == "invite"]
    assert len(invites) == 1
    assert invites[0]["link"] == "/group"
    assert "Группа" in invites[0]["title"]
    assert data["unread_count"] >= 1


def test_match_notifications_exclude_actor(client: TestClient, engine):
    me = login(client, "Капитан")
    gid = _group(client)
    member_id = add_group_member(engine, gid, "Боец")
    fids = [f["id"] for f in client.get(f"/api/groups/{gid}/factions").json()]

    started = start_match(
        client,
        gid,
        [
            {"user_id": me["id"], "faction_id": fids[0]},
            {"user_id": member_id, "faction_id": fids[1]},
        ],
    )
    assert started.status_code == 200, started.text
    mid = started.json()["id"]

    # Инициатор (Капитан) себе уведомление не шлёт.
    mine = client.get("/api/notifications").json()
    assert all(n["type"] != "match_started" for n in mine["items"])

    # Участник получает уведомление о старте со ссылкой на партию.
    login(client, "Боец")
    his = client.get("/api/notifications").json()
    started_notifs = [n for n in his["items"] if n["type"] == "match_started"]
    assert len(started_notifs) == 1
    assert started_notifs[0]["link"] == f"/match/{mid}"

    # Финиш (инициатор снова Капитан) → участник получает уведомление о завершении.
    login(client, "Капитан")
    fin = finish_match(
        client,
        mid,
        [{"user_id": me["id"], "place": 1}, {"user_id": member_id, "place": 2}],
    )
    assert fin.status_code == 200, fin.text

    login(client, "Боец")
    his2 = client.get("/api/notifications").json()
    assert any(
        n["type"] == "match_finished" and n["link"] == f"/match/{mid}" for n in his2["items"]
    )


def test_mark_read_endpoint(client: TestClient):
    login(client, "Овнер2")
    gid = _group(client)
    _dev_user(client, "Гость2")
    client.post(
        f"/api/groups/{gid}/invitations", json={"nickname": "Гость2"}, headers=csrf_headers(client)
    )

    login(client, "Гость2")
    assert client.get("/api/notifications").json()["unread_count"] >= 1
    r = client.post("/api/notifications/read", json={}, headers=csrf_headers(client))
    assert r.status_code == 200, r.text
    assert client.get("/api/notifications").json()["unread_count"] == 0