"""
Unit tests for litellm/proxy/google_endpoints/agents_endpoints.py

Focus: verify that list_gemini_agents, get_gemini_agent, delete_gemini_agent,
and list_gemini_agent_versions correctly forward per-request credentials
(api_key, api_base, …) supplied via the JSON-encoded litellm_params_template
query parameter.  Flat credential query params (e.g. ?api_key=…) are no
longer accepted — they would appear in server logs.
"""

import json
import os
import sys
from unittest.mock import AsyncMock, MagicMock, patch

import pytest
from fastapi import Request
from fastapi.datastructures import Headers, QueryParams

sys.path.insert(0, os.path.abspath("../.."))

from litellm.proxy.google_endpoints.agents_endpoints import (
    _merge_query_params_into_data,
)


# ---------------------------------------------------------------------------
# Helpers
# ---------------------------------------------------------------------------


def _make_request(query_string: str = "") -> MagicMock:
    """Build a minimal mock Request whose query_params match *query_string*."""
    req = MagicMock(spec=Request)
    req.query_params = QueryParams(query_string)
    req.headers = Headers({})
    return req


# ---------------------------------------------------------------------------
# _merge_query_params_into_data – unit tests for the helper
# ---------------------------------------------------------------------------


class TestMergeQueryParamsIntoData:
    def test_no_query_params_leaves_data_unchanged(self):
        data = {"custom_llm_provider": "gemini"}
        request = _make_request("")
        result = _merge_query_params_into_data(data, request)
        assert result == {"custom_llm_provider": "gemini"}

    def test_flat_api_key_is_ignored(self):
        """Flat credential params must NOT be merged (they leak into server logs)."""
        data = {"custom_llm_provider": "gemini"}
        request = _make_request("api_key=AIzaSyTest123")
        _merge_query_params_into_data(data, request)
        assert "api_key" not in data
        assert data["custom_llm_provider"] == "gemini"

    def test_flat_params_are_silently_dropped(self):
        """Flat params (including name injection attempts) are ignored entirely."""
        data = {"name": "my-agent", "custom_llm_provider": "gemini"}
        request = _make_request("name=INJECTED&api_key=AIzaSyTest")
        _merge_query_params_into_data(data, request)
        assert data["name"] == "my-agent"
        assert "api_key" not in data

    def test_litellm_params_template_json_is_expanded(self):
        template = json.dumps(
            {"api_key": "AIzaFromTemplate", "api_base": "https://example.com"}
        )
        from urllib.parse import quote

        request = _make_request(f"litellm_params_template={quote(template)}")
        data = {"custom_llm_provider": "gemini"}
        _merge_query_params_into_data(data, request)
        assert data["api_key"] == "AIzaFromTemplate"
        assert data["api_base"] == "https://example.com"
        # The raw template key itself must NOT appear in data
        assert "litellm_params_template" not in data

    def test_litellm_params_template_does_not_overwrite_existing(self):
        template = json.dumps(
            {"api_key": "FromTemplate", "custom_llm_provider": "openai"}
        )
        from urllib.parse import quote

        request = _make_request(f"litellm_params_template={quote(template)}")
        data = {"custom_llm_provider": "gemini"}
        _merge_query_params_into_data(data, request)
        # custom_llm_provider was already set; template must not override it
        assert data["custom_llm_provider"] == "gemini"
        assert data["api_key"] == "FromTemplate"

    def test_invalid_litellm_params_template_json_is_ignored(self):
        request = _make_request("litellm_params_template=NOT_VALID_JSON")
        data = {"custom_llm_provider": "gemini"}
        _merge_query_params_into_data(data, request)
        # Bad JSON is silently skipped; other data stays intact
        assert data == {"custom_llm_provider": "gemini"}

    def test_template_only_no_flat_params_merged(self):
        """Only litellm_params_template is expanded; unknown flat params are dropped."""
        template = json.dumps({"api_key": "FromTemplate"})
        from urllib.parse import quote

        qs = f"litellm_params_template={quote(template)}&vertex_project=my-project"
        request = _make_request(qs)
        data = {"custom_llm_provider": "gemini"}
        _merge_query_params_into_data(data, request)
        assert data["api_key"] == "FromTemplate"
        # flat vertex_project is ignored since it wasn't in litellm_params_template
        assert "vertex_project" not in data
        assert "litellm_params_template" not in data


# ---------------------------------------------------------------------------
# Endpoint-level smoke tests: data dict is populated before the processor call
# ---------------------------------------------------------------------------


@pytest.fixture
def mock_srv():
    """Patch _proxy_server_imports to return lightweight fakes."""
    srv = {
        "general_settings": {},
        "llm_router": MagicMock(),
        "proxy_config": MagicMock(),
        "proxy_logging_obj": MagicMock(),
        "select_data_generator": MagicMock(),
        "user_api_base": None,
        "user_max_tokens": None,
        "user_model": None,
        "user_request_timeout": None,
        "user_temperature": None,
        "version": "0.0.0",
    }
    with patch(
        "litellm.proxy.google_endpoints.agents_endpoints._proxy_server_imports",
        return_value=srv,
    ):
        yield srv


@pytest.fixture
def user_api_key_dict():
    from litellm.proxy._types import UserAPIKeyAuth

    return UserAPIKeyAuth(api_key="test-key")


def _make_endpoint_request(query_string: str = "") -> MagicMock:
    req = MagicMock(spec=Request)
    req.query_params = QueryParams(query_string)
    req.headers = Headers({})
    req.scope = {}

    async def _body():
        return b""

    req.body = _body
    return req


@pytest.mark.asyncio
async def test_list_gemini_agents_passes_api_key_to_processor(
    mock_srv, user_api_key_dict
):
    from urllib.parse import quote

    from litellm.proxy.google_endpoints.agents_endpoints import list_gemini_agents

    template = json.dumps({"api_key": "AIzaListTest"})

    with patch(
        "litellm.proxy.google_endpoints.agents_endpoints.ProxyBaseLLMRequestProcessing"
    ) as MockProcessor:
        instance = MockProcessor.return_value
        instance.base_process_llm_request = AsyncMock(return_value=MagicMock())

        request = _make_endpoint_request(f"litellm_params_template={quote(template)}")
        await list_gemini_agents(
            request=request,
            fastapi_response=MagicMock(),
            user_api_key_dict=user_api_key_dict,
        )

        init_data = MockProcessor.call_args[1]["data"]
        assert init_data.get("api_key") == "AIzaListTest"
        assert init_data.get("custom_llm_provider") == "gemini"


@pytest.mark.asyncio
async def test_get_gemini_agent_passes_api_key_to_processor(
    mock_srv, user_api_key_dict
):
    from urllib.parse import quote

    from litellm.proxy.google_endpoints.agents_endpoints import get_gemini_agent

    template = json.dumps({"api_key": "AIzaGetTest"})

    with patch(
        "litellm.proxy.google_endpoints.agents_endpoints.ProxyBaseLLMRequestProcessing"
    ) as MockProcessor:
        instance = MockProcessor.return_value
        instance.base_process_llm_request = AsyncMock(return_value=MagicMock())

        request = _make_endpoint_request(f"litellm_params_template={quote(template)}")
        await get_gemini_agent(
            request=request,
            name="my-agent",
            fastapi_response=MagicMock(),
            user_api_key_dict=user_api_key_dict,
        )

        init_data = MockProcessor.call_args[1]["data"]
        assert init_data.get("api_key") == "AIzaGetTest"
        assert init_data.get("name") == "my-agent"
        assert init_data.get("custom_llm_provider") == "gemini"


@pytest.mark.asyncio
async def test_delete_gemini_agent_passes_api_key_to_processor(
    mock_srv, user_api_key_dict
):
    from urllib.parse import quote

    from litellm.proxy.google_endpoints.agents_endpoints import delete_gemini_agent

    template = json.dumps({"api_key": "AIzaDeleteTest"})

    with patch(
        "litellm.proxy.google_endpoints.agents_endpoints.ProxyBaseLLMRequestProcessing"
    ) as MockProcessor:
        instance = MockProcessor.return_value
        instance.base_process_llm_request = AsyncMock(return_value=MagicMock())

        request = _make_endpoint_request(f"litellm_params_template={quote(template)}")
        await delete_gemini_agent(
            request=request,
            name="my-agent",
            fastapi_response=MagicMock(),
            user_api_key_dict=user_api_key_dict,
        )

        init_data = MockProcessor.call_args[1]["data"]
        assert init_data.get("api_key") == "AIzaDeleteTest"
        assert init_data.get("name") == "my-agent"
        assert init_data.get("custom_llm_provider") == "gemini"


@pytest.mark.asyncio
async def test_list_gemini_agent_versions_passes_api_key_to_processor(
    mock_srv, user_api_key_dict
):
    from urllib.parse import quote

    from litellm.proxy.google_endpoints.agents_endpoints import (
        list_gemini_agent_versions,
    )

    template = json.dumps({"api_key": "AIzaVersionsTest"})

    with patch(
        "litellm.proxy.google_endpoints.agents_endpoints.ProxyBaseLLMRequestProcessing"
    ) as MockProcessor:
        instance = MockProcessor.return_value
        instance.base_process_llm_request = AsyncMock(return_value=MagicMock())

        request = _make_endpoint_request(f"litellm_params_template={quote(template)}")
        await list_gemini_agent_versions(
            request=request,
            name="my-agent",
            fastapi_response=MagicMock(),
            user_api_key_dict=user_api_key_dict,
        )

        init_data = MockProcessor.call_args[1]["data"]
        assert init_data.get("api_key") == "AIzaVersionsTest"
        assert init_data.get("name") == "my-agent"
        assert init_data.get("custom_llm_provider") == "gemini"


@pytest.mark.asyncio
async def test_get_gemini_agent_name_not_overwritten_by_query_param(
    mock_srv, user_api_key_dict
):
    """Path-param ``name`` must not be replaced by an attacker-controlled query param."""
    from urllib.parse import quote

    from litellm.proxy.google_endpoints.agents_endpoints import get_gemini_agent

    with patch(
        "litellm.proxy.google_endpoints.agents_endpoints.ProxyBaseLLMRequestProcessing"
    ) as MockProcessor:
        instance = MockProcessor.return_value
        instance.base_process_llm_request = AsyncMock(return_value=MagicMock())

        # Even if a caller tries to inject "name" via flat query param, it is
        # ignored (flat params are not merged).  The path-param name wins.
        # ``api_key`` is supplied via the JSON template (required for non-admin
        # callers — see test_*_non_admin_without_api_key_is_rejected below).
        template = json.dumps({"api_key": "AIzaTest"})
        request = _make_endpoint_request(
            f"name=INJECTED&litellm_params_template={quote(template)}"
        )
        await get_gemini_agent(
            request=request,
            name="real-agent",
            fastapi_response=MagicMock(),
            user_api_key_dict=user_api_key_dict,
        )

        init_data = MockProcessor.call_args[1]["data"]
        assert init_data["name"] == "real-agent"


@pytest.mark.asyncio
async def test_list_agents_template_via_query_param(mock_srv, user_api_key_dict):
    """litellm_params_template in query string is expanded."""
    from litellm.proxy.google_endpoints.agents_endpoints import list_gemini_agents
    from urllib.parse import quote

    template = json.dumps({"api_key": "TemplateKey", "vertex_project": "proj-x"})

    with patch(
        "litellm.proxy.google_endpoints.agents_endpoints.ProxyBaseLLMRequestProcessing"
    ) as MockProcessor:
        instance = MockProcessor.return_value
        instance.base_process_llm_request = AsyncMock(return_value=MagicMock())

        request = _make_endpoint_request(f"litellm_params_template={quote(template)}")
        await list_gemini_agents(
            request=request,
            fastapi_response=MagicMock(),
            user_api_key_dict=user_api_key_dict,
        )

        init_data = MockProcessor.call_args[1]["data"]
        assert init_data["api_key"] == "TemplateKey"
        assert init_data["vertex_project"] == "proj-x"
        assert "litellm_params_template" not in init_data


# ---------------------------------------------------------------------------
# Security guards (veria-flagged findings)
# ---------------------------------------------------------------------------


@pytest.fixture
def proxy_admin_user_api_key_dict():
    from litellm.proxy._types import LitellmUserRoles, UserAPIKeyAuth

    return UserAPIKeyAuth(
        api_key="sk-admin",
        user_role=LitellmUserRoles.PROXY_ADMIN,
    )


@pytest.mark.asyncio
async def test_list_agents_non_admin_without_api_key_is_rejected(
    mock_srv, user_api_key_dict
):
    """Non-admin callers must supply an explicit api_key — the proxy must not
    silently fall back to the operator's shared GOOGLE_API_KEY/GEMINI_API_KEY.
    """
    from fastapi import HTTPException

    from litellm.proxy.google_endpoints.agents_endpoints import list_gemini_agents

    with patch(
        "litellm.proxy.google_endpoints.agents_endpoints.ProxyBaseLLMRequestProcessing"
    ) as MockProcessor:
        instance = MockProcessor.return_value
        instance.base_process_llm_request = AsyncMock(return_value=MagicMock())

        request = _make_endpoint_request("")
        with pytest.raises(HTTPException) as excinfo:
            await list_gemini_agents(
                request=request,
                fastapi_response=MagicMock(),
                user_api_key_dict=user_api_key_dict,
            )
        assert excinfo.value.status_code == 401
        # Processor must never be invoked
        instance.base_process_llm_request.assert_not_called()


@pytest.mark.asyncio
async def test_delete_agent_non_admin_without_api_key_is_rejected(
    mock_srv, user_api_key_dict
):
    from fastapi import HTTPException

    from litellm.proxy.google_endpoints.agents_endpoints import delete_gemini_agent

    with patch(
        "litellm.proxy.google_endpoints.agents_endpoints.ProxyBaseLLMRequestProcessing"
    ) as MockProcessor:
        instance = MockProcessor.return_value
        instance.base_process_llm_request = AsyncMock(return_value=MagicMock())

        request = _make_endpoint_request("")
        with pytest.raises(HTTPException) as excinfo:
            await delete_gemini_agent(
                request=request,
                name="my-agent",
                fastapi_response=MagicMock(),
                user_api_key_dict=user_api_key_dict,
            )
        assert excinfo.value.status_code == 401
        instance.base_process_llm_request.assert_not_called()


@pytest.mark.asyncio
async def test_create_agent_non_admin_without_api_key_is_rejected(
    mock_srv, user_api_key_dict
):
    from fastapi import HTTPException

    from litellm.proxy.google_endpoints.agents_endpoints import create_gemini_agent

    with (
        patch(
            "litellm.proxy.google_endpoints.agents_endpoints.ProxyBaseLLMRequestProcessing"
        ) as MockProcessor,
        patch(
            "litellm.proxy.google_endpoints.agents_endpoints._read_request_body",
            new=AsyncMock(return_value={"name": "agent-1", "base_agent": "waverunner"}),
        ),
    ):
        instance = MockProcessor.return_value
        instance.base_process_llm_request = AsyncMock(return_value=MagicMock())

        request = _make_endpoint_request("")
        with pytest.raises(HTTPException) as excinfo:
            await create_gemini_agent(
                request=request,
                fastapi_response=MagicMock(),
                user_api_key_dict=user_api_key_dict,
            )
        assert excinfo.value.status_code == 401
        instance.base_process_llm_request.assert_not_called()


@pytest.mark.asyncio
async def test_list_agents_proxy_admin_may_use_env_fallback(
    mock_srv, proxy_admin_user_api_key_dict
):
    """Proxy admins (master key) keep the env-fallback convenience."""
    from litellm.proxy.google_endpoints.agents_endpoints import list_gemini_agents

    with patch(
        "litellm.proxy.google_endpoints.agents_endpoints.ProxyBaseLLMRequestProcessing"
    ) as MockProcessor:
        instance = MockProcessor.return_value
        instance.base_process_llm_request = AsyncMock(return_value=MagicMock())

        request = _make_endpoint_request("")
        await list_gemini_agents(
            request=request,
            fastapi_response=MagicMock(),
            user_api_key_dict=proxy_admin_user_api_key_dict,
        )

        init_data = MockProcessor.call_args[1]["data"]
        assert "api_key" not in init_data
        instance.base_process_llm_request.assert_awaited_once()


def test_validate_environment_rejects_api_base_override_without_explicit_key(
    monkeypatch,
):
    """SECURITY: caller-supplied api_base must be paired with an explicit
    api_key — otherwise the proxy's shared GOOGLE_API_KEY leaks to the
    attacker-controlled host via the x-goog-api-key header.
    """
    from litellm.llms.gemini.agents.transformation import GeminiAgentsConfig

    # Even if env-fallback is available, api_base override must require api_key.
    monkeypatch.setenv("GOOGLE_API_KEY", "AIzaSharedSecret")

    cfg = GeminiAgentsConfig()
    with pytest.raises(ValueError, match="api_base"):
        cfg.validate_environment(
            headers={},
            litellm_params={"api_base": "https://attacker.example"},
        )


def test_validate_environment_allows_api_base_with_explicit_key(monkeypatch):
    """api_base override is OK when paired with an explicit api_key."""
    from litellm.llms.gemini.agents.transformation import GeminiAgentsConfig

    monkeypatch.delenv("GOOGLE_API_KEY", raising=False)
    monkeypatch.delenv("GEMINI_API_KEY", raising=False)

    cfg = GeminiAgentsConfig()
    headers = cfg.validate_environment(
        headers={},
        litellm_params={
            "api_base": "https://my-gemini-proxy.example",
            "api_key": "AIzaCallerOwned",
        },
    )
    assert headers["x-goog-api-key"] == "AIzaCallerOwned"


def test_validate_environment_env_fallback_when_no_api_base_override(monkeypatch):
    """Without api_base override, env fallback continues to work for SDK use."""
    from litellm.llms.gemini.agents.transformation import GeminiAgentsConfig

    monkeypatch.setenv("GOOGLE_API_KEY", "AIzaFromEnv")
    monkeypatch.delenv("GEMINI_API_KEY", raising=False)

    cfg = GeminiAgentsConfig()
    headers = cfg.validate_environment(headers={}, litellm_params={})
    assert headers["x-goog-api-key"] == "AIzaFromEnv"