"""Regression tests for endpoint owner scoping in secondary model routes."""

from pathlib import Path
from types import SimpleNamespace

import pytest
from fastapi import HTTPException


def _compare_request(user="alice", is_admin=False):
    return SimpleNamespace(
        state=SimpleNamespace(current_user=user),
        app=SimpleNamespace(
            state=SimpleNamespace(
                auth_manager=SimpleNamespace(is_admin=lambda u: is_admin)
            )
        ),
    )


def _compare_start_route(session_manager):
    from routes.compare_routes import setup_compare_routes

    router = setup_compare_routes(session_manager)
    # setup_compare_routes registers on a module-global router, so each call
    # appends another /start route; take the most recently registered one so we
    # get the handler bound to *this* session_manager.
    return [
        r.endpoint for r in router.routes
        if getattr(r, "path", "") == "/api/compare/start"
    ][-1]


class _FakeDB:
    """The endpoint lookup is patched, so only the trailing Comparison insert
    touches this — swallow add/commit/close so the test never hits a real DB."""

    def add(self, *a, **k):
        pass

    def commit(self):
        pass

    def close(self):
        pass


class _SessionStore:
    def __init__(self, store):
        self._store = store

    def get(self, key, default=None):
        return self._store.get(key, default)


def test_compare_start_rejects_unregistered_endpoint_for_non_admin(monkeypatch):
    import routes.compare_routes as cr

    monkeypatch.setattr(cr, "SessionLocal", lambda: _FakeDB())
    # Nothing visible to the caller matches the supplied URL → raw, unregistered.
    monkeypatch.setattr(cr, "_owned_endpoint_by_url", lambda *a, **k: None)

    start = _compare_start_route(
        SimpleNamespace(create_session=lambda **_: None, sessions={})
    )
    with pytest.raises(HTTPException) as exc:
        start(
            _compare_request(),
            prompt="p",
            model_a="a",
            model_b="b",
            endpoint_a="http://127.0.0.1:8000/v1",
            endpoint_b="http://127.0.0.1:8001/v1",
        )

    assert exc.value.status_code == 403


def test_compare_start_allows_owned_registered_endpoint_for_non_admin(monkeypatch):
    # Regression: the followup must not blanket-reject non-admins. Compare
    # resolves endpoints by URL (no endpoint_id), so a caller comparing a
    # registered endpoint they own has to be allowed — only truly raw,
    # unregistered URLs are rejected.
    import routes.compare_routes as cr

    monkeypatch.setattr(cr, "SessionLocal", lambda: _FakeDB())
    owned = SimpleNamespace(id=7, api_key="sk-secret", base_url="http://127.0.0.1:8000/v1")
    monkeypatch.setattr(cr, "_owned_endpoint_by_url", lambda *a, **k: owned)

    created = {}

    def _create_session(session_id, **_):
        created[session_id] = SimpleNamespace(headers={})

    start = _compare_start_route(
        SimpleNamespace(create_session=_create_session, sessions=_SessionStore(created))
    )
    # Must complete without raising 403.
    start(
        _compare_request(),
        prompt="p",
        model_a="a",
        model_b="b",
        endpoint_a="http://127.0.0.1:8000/v1",
        endpoint_b="http://127.0.0.1:8000/v1",
    )

    # Both [CMP] sessions created, each with the owned endpoint's key copied in.
    assert len(created) == 2
    for s in created.values():
        assert s.headers


def test_compare_start_rejects_another_users_private_endpoint(monkeypatch):
    # bob owns the endpoint at this URL; alice supplying the same URL gets no
    # match from the owner-scoped lookup (owner_filter drops bob's private row),
    # so compare treats it exactly like a raw unregistered URL → 403. She can
    # neither bind a session to his endpoint nor copy his key.
    import routes.compare_routes as cr

    monkeypatch.setattr(cr, "SessionLocal", lambda: _FakeDB())

    def _scoped(db, base, owner):
        # Only the owner ("bob") can see this private row; everyone else → None.
        if owner == "bob":
            return SimpleNamespace(id=9, api_key="sk-bob", base_url=base)
        return None

    monkeypatch.setattr(cr, "_owned_endpoint_by_url", _scoped)

    created = {}

    def _create_session(session_id, **_):
        created[session_id] = SimpleNamespace(headers={})

    start = _compare_start_route(
        SimpleNamespace(create_session=_create_session, sessions=_SessionStore(created))
    )
    with pytest.raises(HTTPException) as exc:
        start(
            _compare_request(user="alice"),
            prompt="p",
            model_a="a",
            model_b="b",
            endpoint_a="http://10.0.0.5:9000/v1",
            endpoint_b="http://10.0.0.5:9000/v1",
        )

    assert exc.value.status_code == 403
    # Nothing was created → no session bound to bob's endpoint, no key copied.
    assert created == {}


def test_compare_start_rejects_before_creating_any_session_on_mixed_endpoints(monkeypatch):
    # Mixed request: endpoint A is a registered endpoint the caller owns,
    # endpoint B is a raw/unregistered URL. Both endpoints are resolved and
    # validated up front, so the unregistered B makes the WHOLE request 403 with
    # nothing created — no half-built [CMP] session for A, and therefore none of
    # A's Authorization header left behind. Fails on the old interleaved loop
    # that created A's session before reaching (and rejecting) B.
    import routes.compare_routes as cr
    from src.endpoint_resolver import normalize_base

    monkeypatch.setattr(cr, "SessionLocal", lambda: _FakeDB())
    owned = SimpleNamespace(id=7, api_key="sk-secret", base_url="http://127.0.0.1:8000/v1")
    owned_base = normalize_base(owned.base_url)

    def _scoped(db, base, owner):
        # Only endpoint A's URL maps to a visible registered endpoint; B → None.
        return owned if base == owned_base else None

    monkeypatch.setattr(cr, "_owned_endpoint_by_url", _scoped)

    created = {}

    def _create_session(session_id, **kw):
        created[session_id] = SimpleNamespace(headers={})

    start = _compare_start_route(
        SimpleNamespace(create_session=_create_session, sessions=_SessionStore(created))
    )
    with pytest.raises(HTTPException) as exc:
        start(
            _compare_request(),
            prompt="p",
            model_a="a",
            model_b="b",
            endpoint_a="http://127.0.0.1:8000/v1",     # owned, registered
            endpoint_b="http://203.0.113.9:9999/v1",   # raw, unregistered
        )

    assert exc.value.status_code == 403
    # No partial session survives the reject, so no copied header does either.
    assert created == {}


def test_compare_start_binds_session_to_registered_endpoint_url(monkeypatch):
    # The session must dial the registered endpoint's OWN normalized base URL,
    # never the raw caller-supplied string. Mint the owned row with a base URL
    # that differs from the messy raw input so a regression to `endpoint_url=
    # endpoint` would surface here.
    import routes.compare_routes as cr
    from src.endpoint_resolver import build_chat_url, normalize_base

    monkeypatch.setattr(cr, "SessionLocal", lambda: _FakeDB())
    owned = SimpleNamespace(id=7, api_key="sk-secret", base_url="http://127.0.0.1:8000/v1")
    monkeypatch.setattr(cr, "_owned_endpoint_by_url", lambda *a, **k: owned)

    created = {}
    captured = {}

    def _create_session(session_id, **kw):
        created[session_id] = SimpleNamespace(headers={})
        captured[session_id] = kw

    start = _compare_start_route(
        SimpleNamespace(create_session=_create_session, sessions=_SessionStore(created))
    )
    raw_url = "http://127.0.0.1:8000/v1/"  # trailing slash → not byte-identical
    start(
        _compare_request(),
        prompt="p",
        model_a="a",
        model_b="b",
        endpoint_a=raw_url,
        endpoint_b=raw_url,
    )

    expected = build_chat_url(normalize_base(owned.base_url))
    assert captured and all(kw["endpoint_url"] == expected for kw in captured.values())
    # The owned endpoint's key is copied into each session's headers.
    for s in created.values():
        assert s.headers


def test_compare_start_admin_raw_endpoint_carries_no_borrowed_key(monkeypatch):
    # Explicit admin/raw-endpoint behavior: an admin may pass a raw URL that
    # matches no registered endpoint. It is allowed (the reject helper is a
    # no-op for admins), the session keeps the raw URL, and — because nothing
    # matched — no key/headers are inherited from any endpoint row.
    import routes.compare_routes as cr

    monkeypatch.setattr(cr, "SessionLocal", lambda: _FakeDB())
    monkeypatch.setattr(cr, "_owned_endpoint_by_url", lambda *a, **k: None)

    created = {}
    captured = {}

    def _create_session(session_id, **kw):
        created[session_id] = SimpleNamespace(headers={})
        captured[session_id] = kw

    start = _compare_start_route(
        SimpleNamespace(create_session=_create_session, sessions=_SessionStore(created))
    )
    raw_url = "http://198.51.100.7:1234/v1"
    start(
        _compare_request(user="root", is_admin=True),
        prompt="p",
        model_a="a",
        model_b="b",
        endpoint_a=raw_url,
        endpoint_b=raw_url,
    )

    assert len(created) == 2
    for kw in captured.values():
        assert kw["endpoint_url"] == raw_url  # raw URL preserved for admins
    for s in created.values():
        assert s.headers == {}  # no borrowed key/headers


def test_compare_start_prefers_endpoint_id_over_url(monkeypatch):
    # Two endpoints visible to the caller share a base_url but hold DIFFERENT
    # api_keys (e.g. two accounts on one provider). A base_url-only match returns
    # whichever row sorts first, so it can copy the WRONG key. Passing the
    # explicit id must pin the intended endpoint and copy ITS key.
    import routes.compare_routes as cr
    from src.endpoint_resolver import build_chat_url, build_headers, normalize_base

    monkeypatch.setattr(cr, "SessionLocal", lambda: _FakeDB())

    url = "http://127.0.0.1:8000/v1"
    by_url = SimpleNamespace(id=1, api_key="sk-first", base_url=url)   # URL match
    by_id = SimpleNamespace(id=2, api_key="sk-second", base_url=url)   # id match

    # URL resolution would return the WRONG row; the id resolves the intended one.
    monkeypatch.setattr(cr, "_owned_endpoint_by_url", lambda *a, **k: by_url)
    monkeypatch.setattr(
        cr, "_owned_endpoint_by_id", lambda db, eid, owner: by_id if eid == "2" else None
    )

    created = {}
    captured = {}

    def _create_session(session_id, **kw):
        created[session_id] = SimpleNamespace(headers={})
        captured[session_id] = kw

    start = _compare_start_route(
        SimpleNamespace(create_session=_create_session, sessions=_SessionStore(created))
    )
    start(
        _compare_request(),
        prompt="p",
        model_a="a",
        model_b="b",
        endpoint_a="",
        endpoint_b="",
        endpoint_a_id="2",
        endpoint_b_id="2",
    )

    expected_url = build_chat_url(normalize_base(url))
    expected_headers = build_headers("sk-second", url)
    assert captured and all(kw["endpoint_url"] == expected_url for kw in captured.values())
    # The id's key is copied in, NOT the same-URL row's key.
    for s in created.values():
        assert s.headers == expected_headers


def test_compare_start_rejects_unowned_endpoint_id(monkeypatch):
    # An id the caller can't see (wrong owner / deleted) must 404 and must NOT
    # silently fall back to a same-URL row with a different key.
    import routes.compare_routes as cr

    monkeypatch.setattr(cr, "SessionLocal", lambda: _FakeDB())
    # A same-URL row exists and would resolve, but the governing id is invisible.
    monkeypatch.setattr(
        cr,
        "_owned_endpoint_by_url",
        lambda *a, **k: SimpleNamespace(id=1, api_key="sk", base_url="http://127.0.0.1:8000/v1"),
    )
    monkeypatch.setattr(cr, "_owned_endpoint_by_id", lambda *a, **k: None)

    created = {}

    def _create_session(session_id, **_):
        created[session_id] = SimpleNamespace(headers={})

    start = _compare_start_route(
        SimpleNamespace(create_session=_create_session, sessions=_SessionStore(created))
    )
    with pytest.raises(HTTPException) as exc:
        start(
            _compare_request(),
            prompt="p",
            model_a="a",
            model_b="b",
            endpoint_a="",
            endpoint_b="",
            endpoint_a_id="999",
            endpoint_b_id="999",
        )

    assert exc.value.status_code == 404
    assert created == {}


def test_compare_endpoint_key_lookup_is_owner_scoped():
    body = Path("routes/compare_routes.py").read_text(encoding="utf-8")
    start_body = body.split("def start_comparison", 1)[1].split("# Store comparison record", 1)[0]
    helper_body = body.split("def _owned_endpoint_by_url", 1)[1].split("class RecordVoteRequest", 1)[0]
    id_helper_body = body.split("def _owned_endpoint_by_id", 1)[1].split("class RecordVoteRequest", 1)[0]

    assert "_reject_raw_endpoint_url_for_non_admin" in start_body
    assert "_owned_endpoint_by_url(db, base, user)" in start_body
    # Credentials prefer an explicit endpoint id (pins the exact key) and only
    # fall back to URL matching for legacy / admin raw-URL callers.
    assert "_owned_endpoint_by_id(db, eid, user)" in start_body
    # The session binds to the resolved endpoint's stored base URL, not the raw
    # caller-supplied string (the reviewer's remaining compare blocker).
    assert "build_chat_url(normalize_base(ep.base_url))" in start_body
    assert "owner_filter(q, ModelEndpoint, owner)" in helper_body
    # The id lookup is owner-scoped the same way the URL lookup is.
    assert "owner_filter(q, ModelEndpoint, owner)" in id_helper_body


def test_gallery_image_endpoint_lookups_are_owner_scoped():
    body = Path("routes/gallery_routes.py").read_text(encoding="utf-8")
    helper_body = body.split("def _visible_image_endpoint_query", 1)[1].split(
        "def _first_visible_image_endpoint", 1
    )[0]

    assert "owner_filter(q, ModelEndpoint, owner)" in helper_body
    assert body.count("_first_visible_image_endpoint(db, user)") >= 4
    assert body.count("_visible_image_endpoint_for_base(db,") >= 2
    assert "def _current_user_is_admin" in body
    assert body.count('raise HTTPException(403, "Choose a registered image endpoint")') == 2
    for marker in (
        "async def gallery_ai_upscale",
        "async def gallery_style_transfer",
        "async def inpaint_proxy",
        "async def harmonize_image",
    ):
        section = body.split(marker, 1)[1].split("@router.", 1)[0]
        assert "user = require_privilege(request, \"can_generate_images\")" in section
        assert (
            "_first_visible_image_endpoint(db, user)" in section
            or "_visible_image_endpoint_for_base(db," in section
        )


def test_research_endpoint_resolution_passes_owner():
    body = Path("routes/research_routes.py").read_text(encoding="utf-8")

    assert "def _resolve_research_endpoint(sess, owner:" in body
    assert 'resolve_endpoint("research", owner=user)' in body
    assert 'resolve_endpoint("utility", owner=user)' in body
    assert 'resolve_endpoint("default", owner=user)' in body
    assert 'resolve_endpoint("chat", owner=user)' in body
    helper_body = body.split("def _owned_enabled_endpoint", 1)[1].split("def setup_research_routes", 1)[0]
    assert "owner_filter(q, ModelEndpoint, owner)" in helper_body
    assert body.count("_owned_enabled_endpoint(db, user") >= 2