"""Tests for the global AuthMiddleware (fail-closed safety net)."""

import pytest
from starlette.testclient import TestClient

from app.gateway.auth_middleware import AuthMiddleware, _is_public
from app.gateway.csrf_middleware import CSRFMiddleware
from deerflow.config.authorization_config import AuthorizationConfig


@pytest.fixture(autouse=True)
def _default_route_authorization_config(monkeypatch):
    """Keep minimal middleware apps independent of a repository config.yaml."""
    monkeypatch.setattr(
        "app.gateway.authz._get_route_authorization_config",
        lambda: AuthorizationConfig(),
    )


# ── _is_public unit tests ─────────────────────────────────────────────────


@pytest.mark.parametrize(
    "path",
    [
        "/health",
        "/health/",
        "/docs",
        "/docs/",
        "/redoc",
        "/openapi.json",
        "/api/v1/auth/login/local",
        "/api/v1/auth/register",
        "/api/v1/auth/logout",
        "/api/v1/auth/setup-status",
    ],
)
def test_public_paths(path: str):
    assert _is_public(path) is True


@pytest.mark.parametrize(
    "path",
    [
        "/api/models",
        "/api/mcp/config",
        "/api/mcp/cache/reset",
        "/api/memory",
        "/api/skills",
        "/api/threads/123",
        "/api/threads/123/uploads",
        "/api/agents",
        "/api/channels",
        "/api/channels/providers",
        "/api/channels/slack/connect",
        "/api/runs/stream",
        "/api/threads/123/runs",
        "/api/v1/auth/me",
        "/api/v1/auth/change-password",
    ],
)
def test_protected_paths(path: str):
    assert _is_public(path) is False


# ── Trailing slash / normalization edge cases ─────────────────────────────


@pytest.mark.parametrize(
    "path",
    [
        "/api/v1/auth/login/local/",
        "/api/v1/auth/register/",
        "/api/v1/auth/logout/",
        "/api/v1/auth/setup-status/",
    ],
)
def test_public_auth_paths_with_trailing_slash(path: str):
    assert _is_public(path) is True


@pytest.mark.parametrize(
    "path",
    [
        "/api/models/",
        "/api/v1/auth/me/",
        "/api/v1/auth/change-password/",
    ],
)
def test_protected_paths_with_trailing_slash(path: str):
    assert _is_public(path) is False


def test_unknown_api_path_is_protected():
    """Fail-closed: any new /api/* path is protected by default."""
    assert _is_public("/api/new-feature") is False
    assert _is_public("/api/v2/something") is False
    assert _is_public("/api/v1/auth/new-endpoint") is False


# ── Middleware integration tests ──────────────────────────────────────────


def _make_app():
    """Create a minimal FastAPI app with AuthMiddleware for testing."""
    from fastapi import FastAPI, Request

    from deerflow.runtime.user_context import get_effective_user_id

    app = FastAPI()
    app.add_middleware(AuthMiddleware)

    @app.get("/health")
    async def health():
        return {"status": "ok"}

    @app.get("/api/v1/auth/me")
    async def auth_me(request: Request):
        from app.gateway.deps import get_current_user_from_request

        user = await get_current_user_from_request(request)
        return {
            "id": str(user.id),
            "email": user.email,
            "system_role": user.system_role,
            "needs_setup": user.needs_setup,
        }

    @app.get("/api/v1/auth/setup-status")
    async def setup_status():
        return {"needs_setup": False}

    @app.get("/api/models")
    async def models_get():
        return {"models": []}

    @app.get("/api/whoami")
    async def whoami(request: Request):
        user = request.state.user
        return {
            "id": str(user.id),
            "email": getattr(user, "email", None),
            "system_role": getattr(user, "system_role", None),
            "context_user_id": get_effective_user_id(),
        }

    @app.get("/api/current-user-from-dep")
    async def current_user_from_dep(request: Request):
        from app.gateway.deps import get_current_user_from_request

        user = await get_current_user_from_request(request)
        state_user = request.state.user
        return {
            "id": str(user.id),
            "state_id": str(state_user.id),
            "auth_source": request.state.auth_source,
            "context_user_id": get_effective_user_id(),
        }

    @app.put("/api/mcp/config")
    async def mcp_put():
        return {"ok": True}

    @app.post("/api/mcp/cache/reset")
    async def mcp_cache_reset():
        return {"ok": True}

    @app.delete("/api/threads/abc")
    async def thread_delete():
        return {"ok": True}

    @app.patch("/api/threads/abc")
    async def thread_patch():
        return {"ok": True}

    @app.post("/api/threads/abc/runs/stream")
    async def stream():
        return {"ok": True}

    @app.get("/api/future-endpoint")
    async def future():
        return {"ok": True}

    return app


def _make_auth_csrf_app():
    """Create a minimal app with production middleware ordering."""
    from fastapi import FastAPI

    app = FastAPI()
    app.add_middleware(AuthMiddleware)
    app.add_middleware(CSRFMiddleware)

    @app.post("/api/threads/abc/runs/stream")
    async def protected_mutation():
        return {"ok": True}

    return app


@pytest.fixture
def client(monkeypatch):
    monkeypatch.setenv("DEER_FLOW_AUTH_DISABLED", "")
    return TestClient(_make_app())


def test_public_path_no_cookie(client):
    res = client.get("/health")
    assert res.status_code == 200


def test_public_auth_path_no_cookie(client):
    """Public auth endpoints (login/register) pass without cookie."""
    res = client.get("/api/v1/auth/setup-status")
    assert res.status_code == 200


@pytest.mark.parametrize(
    "encoded_path",
    [
        "/api/v1/auth/setup-sta%0Atus",
        "/api/v1/auth/setup-sta%0Dtus",
        "/api/v1/auth/setup-sta%09tus",
        "/api/v1/auth/setup-status%23private",
        "/api/v1/auth/setup-status%3Fprivate",
    ],
)
def test_url_reconstruction_cannot_turn_a_protected_route_path_public(
    monkeypatch,
    encoded_path,
):
    from fastapi import FastAPI

    monkeypatch.setenv("DEER_FLOW_AUTH_DISABLED", "")
    app = FastAPI()
    app.add_middleware(AuthMiddleware)

    @app.get("/api/v1/auth/setup-sta{gap}tus")
    async def control_gap(gap: str):
        return {"gap": gap}

    @app.get("/api/v1/auth/setup-status{suffix}")
    async def delimiter_suffix(suffix: str):
        return {"suffix": suffix}

    response = TestClient(app).get(encoded_path)

    assert response.status_code == 401


def test_auth_uses_the_same_root_path_projection_as_the_router(monkeypatch):
    from fastapi import FastAPI

    monkeypatch.setenv("DEER_FLOW_AUTH_DISABLED", "")
    child = FastAPI()
    child.add_middleware(AuthMiddleware)

    @child.get("/health")
    async def health():
        return {"ok": True}

    parent = FastAPI()
    parent.mount("/prefix", child)

    response = TestClient(parent).get("/prefix/health")

    assert response.status_code == 200


def test_protected_auth_path_no_cookie(client):
    """/auth/me requires cookie even though it's under /api/v1/auth/."""
    res = client.get("/api/v1/auth/me")
    assert res.status_code == 401


def test_protected_path_no_cookie_returns_401(client):
    res = client.get("/api/models")
    assert res.status_code == 401
    body = res.json()
    assert body["detail"]["code"] == "not_authenticated"


def test_auth_disabled_allows_protected_path_without_cookie(monkeypatch):
    monkeypatch.setenv("DEER_FLOW_AUTH_DISABLED", "1")
    client = TestClient(_make_app())

    res = client.get("/api/models")

    assert res.status_code == 200
    assert res.json() == {"models": []}


def test_auth_disabled_stamps_default_admin_user_without_cookie(monkeypatch):
    monkeypatch.setenv("DEER_FLOW_AUTH_DISABLED", "1")
    client = TestClient(_make_app())

    res = client.get("/api/whoami")

    assert res.status_code == 200
    assert res.json() == {
        "id": "default",
        "email": "default@test.local",
        "system_role": "admin",
        "context_user_id": "default",
    }


def test_auth_disabled_auth_me_reuses_middleware_user_without_cookie(monkeypatch):
    monkeypatch.setenv("DEER_FLOW_AUTH_DISABLED", "1")
    client = TestClient(_make_app())

    res = client.get("/api/v1/auth/me")

    assert res.status_code == 200
    assert res.json() == {
        "id": "default",
        "email": "default@test.local",
        "system_role": "admin",
        "needs_setup": False,
    }


def test_auth_disabled_does_not_clobber_valid_session_cookie(monkeypatch):
    from types import SimpleNamespace

    async def fake_current_user(request):
        return SimpleNamespace(
            id="session-user",
            email="session@test.local",
            system_role="user",
            needs_setup=False,
        )

    monkeypatch.setenv("DEER_FLOW_AUTH_DISABLED", "1")
    monkeypatch.setattr("app.gateway.deps.get_current_user_from_request", fake_current_user)
    client = TestClient(_make_app())

    res = client.get("/api/whoami", cookies={"access_token": "valid-session"})

    assert res.status_code == 200
    assert res.json() == {
        "id": "session-user",
        "email": "session@test.local",
        "system_role": "user",
        "context_user_id": "session-user",
    }


def test_auth_disabled_does_not_clobber_internal_auth_identity(monkeypatch):
    from app.gateway.internal_auth import create_internal_auth_headers
    from deerflow.runtime.user_context import DEFAULT_USER_ID

    monkeypatch.setenv("DEER_FLOW_AUTH_DISABLED", "1")
    client = TestClient(_make_app())

    res = client.get(
        "/api/current-user-from-dep",
        headers=create_internal_auth_headers(),
    )

    assert res.status_code == 200
    assert res.json() == {
        "id": DEFAULT_USER_ID,
        "state_id": DEFAULT_USER_ID,
        "auth_source": "internal",
        "context_user_id": DEFAULT_USER_ID,
    }


def test_auth_disabled_skips_csrf_for_state_changing_requests(monkeypatch):
    monkeypatch.setenv("DEER_FLOW_AUTH_DISABLED", "1")
    client = TestClient(_make_auth_csrf_app())

    res = client.post("/api/threads/abc/runs/stream")

    assert res.status_code == 200
    assert res.json() == {"ok": True}


def test_auth_disabled_is_ignored_in_explicit_production_env(monkeypatch):
    monkeypatch.setenv("DEER_FLOW_AUTH_DISABLED", "1")
    monkeypatch.setenv("DEER_FLOW_ENV", "production")
    client = TestClient(_make_app())

    res = client.get("/api/models")

    assert res.status_code == 401


def test_auth_disabled_startup_warning_when_effective(monkeypatch, caplog):
    from app.gateway.auth_disabled import warn_if_auth_disabled_enabled

    monkeypatch.setenv("DEER_FLOW_AUTH_DISABLED", "1")
    monkeypatch.delenv("DEER_FLOW_ENV", raising=False)
    monkeypatch.delenv("ENVIRONMENT", raising=False)

    with caplog.at_level("WARNING", logger="app.gateway.auth_disabled"):
        warn_if_auth_disabled_enabled()

    assert "authentication is bypassed" in caplog.text
    assert "default" in caplog.text


def test_auth_disabled_startup_warning_suppressed_in_explicit_production_env(monkeypatch, caplog):
    from app.gateway.auth_disabled import warn_if_auth_disabled_enabled

    monkeypatch.setenv("DEER_FLOW_AUTH_DISABLED", "1")
    monkeypatch.setenv("ENVIRONMENT", "production")

    with caplog.at_level("WARNING", logger="app.gateway.auth_disabled"):
        warn_if_auth_disabled_enabled()

    assert "authentication is bypassed" not in caplog.text


def test_protected_path_with_junk_cookie_rejected(client):
    """Junk cookie → 401. Middleware strictly validates the JWT now
    (AUTH_TEST_PLAN test 7.5.8); it no longer silently passes bad
    tokens through to the route handler."""
    client.cookies.set("access_token", "some-token")
    res = client.get("/api/models")
    assert res.status_code == 401


def test_protected_post_no_cookie_returns_401(client):
    res = client.post("/api/threads/abc/runs/stream")
    assert res.status_code == 401


def test_mcp_cache_reset_post_no_cookie_returns_401(client):
    res = client.post("/api/mcp/cache/reset")
    assert res.status_code == 401


def test_protected_post_with_internal_auth_header_passes():
    from app.gateway.internal_auth import create_internal_auth_headers

    app = _make_app()
    client = TestClient(app)

    res = client.post(
        "/api/threads/abc/runs/stream",
        headers=create_internal_auth_headers(),
    )

    assert res.status_code == 200


def test_internal_auth_owner_header_of_suspended_account_rejected(tmp_path):
    """(#3462 gap 3) IM-channel dispatch surface: the internal principal is
    synthesized from trusted headers without a users-row lookup, so the
    middleware itself rejects an owner-bound internal call whose account was
    suspended — at the very next request, like every other surface."""
    import asyncio
    import json

    from starlette.requests import Request as StarletteRequest
    from starlette.responses import PlainTextResponse

    from app.gateway.auth.models import User
    from app.gateway.auth.repositories.sqlite import SQLiteUserRepository
    from app.gateway.auth_middleware import AuthMiddleware
    from app.gateway.internal_auth import create_internal_auth_headers
    from deerflow.persistence.engine import close_engine, get_session_factory, init_engine

    async def _dispatch(owner_user_id: str):
        headers = create_internal_auth_headers(owner_user_id=owner_user_id)
        scope = {
            "type": "http",
            "method": "POST",
            "path": "/api/threads/abc/runs/stream",
            "root_path": "",
            "query_string": b"",
            "headers": [(name.lower().encode(), value.encode()) for name, value in headers.items()],
        }

        async def call_next(_request):
            return PlainTextResponse("route-reached")

        response = await AuthMiddleware(None).dispatch(StarletteRequest(scope), call_next)
        body = json.loads(response.body) if response.status_code != 200 else {}
        return response.status_code, body

    async def _run():
        await init_engine("sqlite", url=f"sqlite+aiosqlite:///{tmp_path}/users.db", sqlite_dir=str(tmp_path))
        repo = SQLiteUserRepository(get_session_factory())
        owner = await repo.create_user(User(email="channel-owner@example.com", system_role="user"))
        await repo.set_disabled(str(owner.id), True)

        import app.gateway.deps as deps_module

        saved_repo, saved_provider = deps_module._cached_repo, deps_module._cached_local_provider
        deps_module._cached_repo = repo
        deps_module._cached_local_provider = None
        try:
            status_code, body = await _dispatch(str(owner.id))
            assert status_code == 401
            assert body["detail"]["code"] == "account_disabled"

            # Unknown owner ids stay allowed: an account that does not exist
            # in the users store cannot be suspended.
            status_code, body = await _dispatch("no-such-owner")
            assert status_code == 200

            # Re-enabling restores the internal surface immediately.
            await repo.set_disabled(str(owner.id), False)
            status_code, body = await _dispatch(str(owner.id))
            assert status_code == 200
        finally:
            deps_module._cached_repo = saved_repo
            deps_module._cached_local_provider = saved_provider

    try:
        asyncio.run(_run())
    finally:
        asyncio.run(close_engine())


def test_internal_auth_owner_gate_skipped_in_auth_disabled_mode(monkeypatch):
    """Auth-disabled mode sends the synthetic auth-disabled identity as the
    internal owner; deployments may have no users store at all there, so the
    suspension gate must not attempt a lookup (it would fail the request)."""
    import asyncio

    from starlette.requests import Request as StarletteRequest
    from starlette.responses import PlainTextResponse

    from app.gateway.auth_disabled import AUTH_DISABLED_USER_ID
    from app.gateway.auth_middleware import AuthMiddleware
    from app.gateway.internal_auth import create_internal_auth_headers

    monkeypatch.setenv("DEER_FLOW_AUTH_DISABLED", "1")

    async def _run():
        headers = create_internal_auth_headers(owner_user_id=AUTH_DISABLED_USER_ID)
        scope = {
            "type": "http",
            "method": "POST",
            "path": "/api/threads/abc/runs/stream",
            "root_path": "",
            "query_string": b"",
            "headers": [(name.lower().encode(), value.encode()) for name, value in headers.items()],
        }

        async def call_next(_request):
            return PlainTextResponse("route-reached")

        # No engine / users store is configured on purpose: a lookup here
        # would raise and 500 the request.
        response = await AuthMiddleware(None).dispatch(StarletteRequest(scope), call_next)
        assert response.status_code == 200

    asyncio.run(_run())


def test_protected_post_with_non_ascii_internal_auth_header_returns_401(client):
    from app.gateway.internal_auth import INTERNAL_AUTH_HEADER_NAME

    res = client.post(
        "/api/threads/abc/runs/stream",
        headers={INTERNAL_AUTH_HEADER_NAME: "forged-tok\xe9n".encode("latin-1")},
    )

    assert res.status_code == 401


# ── Method matrix: PUT/DELETE/PATCH also protected ────────────────────────


def test_protected_put_no_cookie(client):
    res = client.put("/api/mcp/config")
    assert res.status_code == 401


def test_protected_delete_no_cookie(client):
    res = client.delete("/api/threads/abc")
    assert res.status_code == 401


def test_protected_patch_no_cookie(client):
    res = client.patch("/api/threads/abc")
    assert res.status_code == 401


def test_put_with_junk_cookie_rejected(client):
    """Junk cookie on PUT → 401 (strict JWT validation in middleware)."""
    client.cookies.set("access_token", "tok")
    res = client.put("/api/mcp/config")
    assert res.status_code == 401


def test_delete_with_junk_cookie_rejected(client):
    """Junk cookie on DELETE → 401 (strict JWT validation in middleware)."""
    client.cookies.set("access_token", "tok")
    res = client.delete("/api/threads/abc")
    assert res.status_code == 401


# ── Fail-closed: unknown future endpoints ─────────────────────────────────


def test_unknown_endpoint_no_cookie_returns_401(client):
    """Any new /api/* endpoint is blocked by default without cookie."""
    res = client.get("/api/future-endpoint")
    assert res.status_code == 401


def test_unknown_endpoint_with_junk_cookie_rejected(client):
    """New endpoints are also protected by strict JWT validation."""
    client.cookies.set("access_token", "tok")
    res = client.get("/api/future-endpoint")
    assert res.status_code == 401