"""
BAN YARO — pytest Fixtures
Wichtig:
  - ENV-Variablen werden VOR dem Import von `backend.main` gesetzt,
    weil `database.DB_PATH = os.getenv("DB_PATH", ...)` beim Modul-Import gebunden wird.
  - Wir mocken APScheduler weg, damit beim lifespan-Startup keine Hintergrund-Jobs starten.
  - Pro Test-Session legen wir eine frische SQLite-Datei in tmp_path an.
"""

from __future__ import annotations

import os
import sys
import secrets
import tempfile
import shutil
from pathlib import Path

import pytest

ROOT       = Path(__file__).resolve().parent.parent
BACKEND_DIR = ROOT / "backend"

# Backend-Pfad in sys.path, damit `from main import app` funktioniert
sys.path.insert(0, str(BACKEND_DIR))


# ------------------------------------------------------------------
# Session-weite App-Instanz
# ------------------------------------------------------------------
@pytest.fixture(scope="session")
def _tmp_db_dir():
    """Temp-Verzeichnis für DB + Media während der Test-Session."""
    d = tempfile.mkdtemp(prefix="banyaro-tests-")
    yield Path(d)
    shutil.rmtree(d, ignore_errors=True)


@pytest.fixture(scope="session")
def app(_tmp_db_dir):
    """
    Initialisiert die FastAPI-App einmal pro Test-Session mit:
      - Test-DB in tmp_path
      - Stubbed Scheduler (keine Background-Jobs)
      - KI_MODE=off (keine Netzwerk-Aufrufe)
      - SMTP-Versand wird gemockt
    """
    db_file    = _tmp_db_dir / "test.db"
    media_dir  = _tmp_db_dir / "media"
    breeder_dir = _tmp_db_dir / "breeder_docs"
    media_dir.mkdir(exist_ok=True)
    breeder_dir.mkdir(exist_ok=True)

    os.environ["DB_PATH"]          = str(db_file)
    os.environ["MEDIA_DIR"]        = str(media_dir)
    os.environ["BREEDER_DOCS_DIR"] = str(breeder_dir)
    os.environ["KI_MODE"]    = "off"
    os.environ["ENV"]        = "test"
    os.environ["JWT_SECRET"] = "test-secret-" + secrets.token_hex(8)
    os.environ["STAGING"]    = "false"
    os.environ["ADMIN_EMAIL"] = "test-admin@example.com"
    # SMTP nicht konfigurieren → _SMTP_READY=False, Mails werden geskippt
    os.environ.pop("SMTP_SUPPORT_USER", None)
    os.environ.pop("SMTP_SUPPORT_PASS", None)

    # Scheduler-Modul vor main-Import stubben — sonst startet APScheduler beim Lifespan
    import scheduler as _sched
    _sched.start = lambda: None      # type: ignore[assignment]
    _sched.stop  = lambda: None      # type: ignore[assignment]

    # Mailer abklemmen — keine echten E-Mails
    import mailer as _mailer
    async def _noop_send(*args, **kwargs):
        return True
    _mailer.send_email = _noop_send  # type: ignore[assignment]

    # Rate-Limit + Login-Lockout fuer Tests deaktivieren — sonst
    # blockiert /api/auth/register nach 5 Aufrufen die ganze Test-Session.
    import ratelimit as _rl
    _noop_rl = lambda *a, **kw: None
    _rl.check                = _noop_rl                       # type: ignore[assignment]
    _rl.is_account_locked    = lambda *a, **kw: False         # type: ignore[assignment]
    _rl.record_login_failure = lambda *a, **kw: 0             # type: ignore[assignment]

    # App importieren (initialisiert DB beim lifespan)
    from main import app as fastapi_app

    # Module-level Aliase ersetzen (Imports der Form `from ratelimit import check as rl_check`)
    import routes.auth as _routes_auth
    _routes_auth.rl_check = _noop_rl  # type: ignore[assignment]
    if hasattr(_routes_auth, "_db_is_account_locked"):
        _routes_auth._db_is_account_locked = lambda *a, **kw: None       # type: ignore[assignment]
    if hasattr(_routes_auth, "_db_record_login_failure"):
        _routes_auth._db_record_login_failure = lambda *a, **kw: 0       # type: ignore[assignment]

    return fastapi_app


@pytest.fixture(scope="session")
def client(app):
    """FastAPI TestClient — triggert lifespan (init_db, seed_movies, …)."""
    from fastapi.testclient import TestClient
    with TestClient(app) as c:
        yield c


# ------------------------------------------------------------------
# Test-User
# ------------------------------------------------------------------
def _register_and_verify(client, email: str, password: str, name: str) -> dict:
    """Helper: Register User + setzt email_verified=1 direkt in der DB."""
    r = client.post("/api/auth/register", json={
        "email": email, "password": password, "name": name
    })
    assert r.status_code == 200, f"Register failed: {r.status_code} {r.text}"

    # email_verified=1 setzen (umgeht E-Mail-Verifikation für Tests)
    from database import db
    with db() as conn:
        conn.execute(
            "UPDATE users SET email_verified=1 WHERE email=?", (email,)
        )
    return {"email": email, "password": password, "name": name}


def _login(client, email: str, password: str) -> str:
    """Helper: Login → JWT-Token zurueck."""
    r = client.post("/api/auth/login", json={"email": email, "password": password})
    assert r.status_code == 200, f"Login failed: {r.status_code} {r.text}"
    return r.json()["token"]


@pytest.fixture
def user(client):
    """Frisch registrierter und verifizierter Test-User mit JWT-Token."""
    email = f"user-{secrets.token_hex(4)}@example.com"
    pw    = "TestPass123!"
    name  = f"tester{secrets.token_hex(3)}"
    info  = _register_and_verify(client, email, pw, name)
    token = _login(client, email, pw)
    info["token"]   = token
    info["headers"] = {"Authorization": f"Bearer {token}"}
    return info


@pytest.fixture
def admin(client):
    """Test-Admin: registriert, verifiziert, rolle='admin' direkt in DB gesetzt."""
    email = f"admin-{secrets.token_hex(4)}@example.com"
    pw    = "AdminPass123!"
    # "admin"/"administrator" sind in der Blocklist → Bezeichner "ops..." verwenden
    name  = f"ops{secrets.token_hex(3)}"
    info  = _register_and_verify(client, email, pw, name)
    from database import db
    with db() as conn:
        conn.execute("UPDATE users SET rolle='admin' WHERE email=?", (email,))
    token = _login(client, email, pw)
    info["token"]   = token
    info["headers"] = {"Authorization": f"Bearer {token}"}
    return info


@pytest.fixture
def dog(client, user):
    """Erstellt einen Hund fuer den Test-User und gibt das Hund-Objekt zurueck."""
    r = client.post(
        "/api/dogs",
        headers=user["headers"],
        json={"name": "Buddy", "rasse": "Labrador", "is_public": False},
    )
    assert r.status_code in (200, 201), f"create_dog failed: {r.status_code} {r.text}"
    return r.json()