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from app.services.email import ConsoleEmailProvider
from tests.conftest import last_code


def _signup(client, email="writer@example.com", password="stardust-42"):
    r = client.post("/api/auth/email/register/start", json={"email": email, "password": password, "name": "Ada L"})
    assert r.status_code == 200, r.text
    r = client.post("/api/auth/email/register/verify", json={"email": email, "code": last_code()})
    assert r.status_code == 200, r.text
    return r.json()


def test_signup_login_me_logout(client):
    data = _signup(client)
    assert data["created"] is True
    assert any(e.subject == "Welcome to Notestack" for e in ConsoleEmailProvider.sent)
    headers = {"Authorization": f"Bearer {data['access_token']}"}
    assert client.get("/api/auth/me", headers=headers).json()["email"] == "writer@example.com"

    r = client.post("/api/auth/email/login", json={"email": "WRITER@example.com", "password": "stardust-42"})
    assert r.status_code == 200

    assert client.post("/api/auth/logout", headers=headers).status_code == 200
    assert client.get("/api/auth/me", headers=headers).status_code == 401  # token_version bumped


def test_wrong_code_and_attempt_limit(client):
    client.post("/api/auth/email/register/start", json={"email": "a@b.co", "password": "longenough"})
    for _ in range(5):
        r = client.post("/api/auth/email/register/verify", json={"email": "a@b.co", "code": "000000"})
        if last_code() == "000000":
            return  # astronomically unlikely collision
        assert r.status_code == 400
    r = client.post("/api/auth/email/register/verify", json={"email": "a@b.co", "code": last_code()})
    assert r.json()["detail"]["code"] == "too_many_attempts"


def test_resend_cooldown(client):
    client.post("/api/auth/email/register/start", json={"email": "c@d.co", "password": "longenough"})
    r = client.post("/api/auth/email/register/resend", json={"email": "c@d.co"})
    assert r.status_code == 429


def test_bad_password_and_weak_password(client):
    _signup(client)
    r = client.post("/api/auth/email/login", json={"email": "writer@example.com", "password": "nope-nope"})
    assert r.status_code == 401
    r = client.post("/api/auth/email/register/start", json={"email": "x@y.co", "password": "short"})
    assert r.status_code == 400


def test_password_reset_revokes_old_tokens(client):
    data = _signup(client)
    old = {"Authorization": f"Bearer {data['access_token']}"}
    client.post("/api/auth/password/forgot/start", json={"email": "writer@example.com"})
    code = last_code()
    r = client.post("/api/auth/password/forgot/check", json={"email": "writer@example.com", "code": code})
    assert r.status_code == 200
    r = client.post("/api/auth/password/forgot/complete",
                    json={"email": "writer@example.com", "code": code, "password": "new-orbit-99"})
    assert r.status_code == 200
    assert client.get("/api/auth/me", headers=old).status_code == 401


def test_google_user_cannot_use_password(client, db_session):
    from app.services.auth_identity import resolve_or_create_google_user

    resolve_or_create_google_user(db_session, email="g@example.com", google_id="123", name="G", avatar_url=None)
    db_session.commit()
    r = client.post("/api/auth/email/register/start", json={"email": "g@example.com", "password": "longenough"})
    assert r.status_code == 409
    assert r.json()["detail"]["code"] == "wrong_provider"


def test_delete_account(client):
    data = _signup(client)
    headers = {"Authorization": f"Bearer {data['access_token']}"}
    assert client.post("/api/auth/delete-account", headers=headers).status_code == 200
    r = client.post("/api/auth/email/login", json={"email": "writer@example.com", "password": "stardust-42"})
    assert r.status_code == 403


def _google_redirect(client, monkeypatch, claims: dict, next_path="/app/notebooks"):
    from urllib.parse import parse_qs, urlparse

    from app.config import settings
    from app.routers import auth as auth_router

    monkeypatch.setattr(settings, "google_client_id", "cid")
    monkeypatch.setattr(settings, "google_client_secret", "secret")
    assert client.get("/api/auth/providers").json() == {"google": "redirect"}

    r = client.get("/api/auth/google/start", params={"next": next_path}, follow_redirects=False)
    assert r.status_code == 302
    q = parse_qs(urlparse(r.headers["location"]).query)
    assert q["redirect_uri"] == ["http://localhost:8000/api/auth/google/callback"]
    monkeypatch.setattr(auth_router, "exchange_google_code", lambda code: {"nonce": q["nonce"][0], **claims})
    r = client.get("/api/auth/google/callback", params={"code": "abc", "state": q["state"][0]},
                   follow_redirects=False)
    assert r.status_code == 302
    location = urlparse(r.headers["location"])
    return location, parse_qs(location.fragment)


def test_google_redirect_flow(client, monkeypatch):
    claims = {"email": "Star@Example.com", "email_verified": True, "sub": "g-1", "name": "Star"}
    location, frag = _google_redirect(client, monkeypatch, claims)
    assert location.path == "/auth/callback"
    assert frag["next"] == ["/app/notebooks"]
    r = client.post("/api/auth/ticket", json={"ticket": frag["ticket"][0]})
    assert r.status_code == 200
    data = r.json()
    assert data["created"] is True and data["user"]["email"] == "star@example.com"
    me = client.get("/api/auth/me", headers={"Authorization": f"Bearer {data['access_token']}"})
    assert me.json()["auth_provider"] == "google"
    # A ticket is not a session token.
    assert client.get("/api/auth/me", headers={"Authorization": f"Bearer {frag['ticket'][0]}"}).status_code == 401


def test_google_redirect_rejects_open_redirect_and_email_accounts(client, monkeypatch):
    _signup(client, email="taken@example.com")
    claims = {"email": "taken@example.com", "email_verified": True, "sub": "g-2"}
    location, frag = _google_redirect(client, monkeypatch, claims, next_path="//evil.example")
    assert location.path == "/auth"
    assert "password" in frag["error"][0]


def test_google_callback_requires_state_cookie(client, monkeypatch):
    from datetime import timedelta

    from app.auth import encode_signed

    state = encode_signed({"typ": "oauth_state", "nonce": "n", "next": "/app"}, timedelta(minutes=5))
    r = client.get("/api/auth/google/callback", params={"code": "abc", "state": state}, follow_redirects=False)
    assert r.headers["location"].startswith("http://localhost:5173/auth#error=")


def test_safe_next():
    from app.routers.auth import _safe_next

    assert _safe_next("/app/notebooks/1?x=1") == "/app/notebooks/1?x=1"
    for bad in (None, "", "https://evil.example", "//evil.example", r"/\evil.example"):
        assert _safe_next(bad) == "/app"