"""Unit tests for API keys routes, focusing on BYOR key validation and retrieval."""

import uuid
from unittest.mock import AsyncMock, MagicMock, patch

import httpx
import pytest
from fastapi import HTTPException
from pydantic import SecretStr
from server.auth.saas_user_auth import SaasUserAuth
from server.routes.api_keys import (
    ByorPermittedResponse,
    CurrentApiKeyResponse,
    LlmApiKeyResponse,
    check_byor_permitted,
    delete_byor_key_from_litellm,
    get_current_api_key,
    get_llm_api_key_for_byor,
)
from storage.lite_llm_manager import LiteLlmManager

from openhands.app_server.user_auth.user_auth import AuthType


class TestVerifyByorKeyInLitellm:
    """Test the verify_byor_key_in_litellm function."""

    @pytest.mark.asyncio
    @patch('storage.lite_llm_manager.LITE_LLM_API_URL', 'https://litellm.example.com')
    @patch('storage.lite_llm_manager.httpx.AsyncClient')
    async def test_verify_valid_key_returns_true(self, mock_client_class):
        """Test that a valid key (200 response) returns True."""
        # Arrange
        byor_key = 'sk-valid-key-123'
        user_id = 'user-123'
        mock_response = MagicMock()
        mock_response.status_code = 200
        mock_response.is_success = True
        mock_client = AsyncMock()
        mock_client.__aenter__.return_value = mock_client
        mock_client.__aexit__.return_value = None
        mock_client.get.return_value = mock_response
        mock_client_class.return_value = mock_client

        # Act
        result = await LiteLlmManager.verify_key(byor_key, user_id)

        # Assert
        assert result is True
        mock_client.get.assert_called_once_with(
            'https://litellm.example.com/v1/models',
            headers={'Authorization': f'Bearer {byor_key}'},
        )

    @pytest.mark.asyncio
    @patch('storage.lite_llm_manager.LITE_LLM_API_URL', 'https://litellm.example.com')
    @patch('storage.lite_llm_manager.httpx.AsyncClient')
    async def test_verify_invalid_key_401_returns_false(self, mock_client_class):
        """Test that an invalid key (401 response) returns False."""
        # Arrange
        byor_key = 'sk-invalid-key-123'
        user_id = 'user-123'
        mock_response = MagicMock()
        mock_response.status_code = 401
        mock_client = AsyncMock()
        mock_client.__aenter__.return_value = mock_client
        mock_client.__aexit__.return_value = None
        mock_client.get.return_value = mock_response
        mock_client_class.return_value = mock_client

        # Act
        result = await LiteLlmManager.verify_key(byor_key, user_id)

        # Assert
        assert result is False

    @pytest.mark.asyncio
    @patch('storage.lite_llm_manager.LITE_LLM_API_URL', 'https://litellm.example.com')
    @patch('storage.lite_llm_manager.httpx.AsyncClient')
    async def test_verify_invalid_key_403_returns_false(self, mock_client_class):
        """Test that an invalid key (403 response) returns False."""
        # Arrange
        byor_key = 'sk-forbidden-key-123'
        user_id = 'user-123'
        mock_response = MagicMock()
        mock_response.status_code = 403
        mock_client = AsyncMock()
        mock_client.__aenter__.return_value = mock_client
        mock_client.__aexit__.return_value = None
        mock_client.get.return_value = mock_response
        mock_client_class.return_value = mock_client

        # Act
        result = await LiteLlmManager.verify_key(byor_key, user_id)

        # Assert
        assert result is False

    @pytest.mark.asyncio
    @patch('storage.lite_llm_manager.LITE_LLM_API_URL', 'https://litellm.example.com')
    @patch('storage.lite_llm_manager.httpx.AsyncClient')
    async def test_verify_server_error_returns_false(self, mock_client_class):
        """Test that a server error (500) returns False to ensure key validity."""
        # Arrange
        byor_key = 'sk-key-123'
        user_id = 'user-123'
        mock_response = MagicMock()
        mock_response.status_code = 500
        mock_response.is_success = False
        mock_client = AsyncMock()
        mock_client.__aenter__.return_value = mock_client
        mock_client.__aexit__.return_value = None
        mock_client.get.return_value = mock_response
        mock_client_class.return_value = mock_client

        # Act
        result = await LiteLlmManager.verify_key(byor_key, user_id)

        # Assert
        assert result is False

    @pytest.mark.asyncio
    @patch('storage.lite_llm_manager.LITE_LLM_API_URL', 'https://litellm.example.com')
    @patch('storage.lite_llm_manager.httpx.AsyncClient')
    async def test_verify_timeout_returns_false(self, mock_client_class):
        """Test that a timeout returns False to ensure key validity."""
        # Arrange
        byor_key = 'sk-key-123'
        user_id = 'user-123'
        mock_client = AsyncMock()
        mock_client.__aenter__.return_value = mock_client
        mock_client.__aexit__.return_value = None
        mock_client.get.side_effect = httpx.TimeoutException('Request timed out')
        mock_client_class.return_value = mock_client

        # Act
        result = await LiteLlmManager.verify_key(byor_key, user_id)

        # Assert
        assert result is False

    @pytest.mark.asyncio
    @patch('storage.lite_llm_manager.LITE_LLM_API_URL', 'https://litellm.example.com')
    @patch('storage.lite_llm_manager.httpx.AsyncClient')
    async def test_verify_network_error_returns_false(self, mock_client_class):
        """Test that a network error returns False to ensure key validity."""
        # Arrange
        byor_key = 'sk-key-123'
        user_id = 'user-123'
        mock_client = AsyncMock()
        mock_client.__aenter__.return_value = mock_client
        mock_client.__aexit__.return_value = None
        mock_client.get.side_effect = httpx.NetworkError('Network error')
        mock_client_class.return_value = mock_client

        # Act
        result = await LiteLlmManager.verify_key(byor_key, user_id)

        # Assert
        assert result is False

    @pytest.mark.asyncio
    @patch('storage.lite_llm_manager.LITE_LLM_API_URL', None)
    async def test_verify_missing_api_url_returns_false(self):
        """Test that missing LITE_LLM_API_URL returns False."""
        # Arrange
        byor_key = 'sk-key-123'
        user_id = 'user-123'

        # Act
        result = await LiteLlmManager.verify_key(byor_key, user_id)

        # Assert
        assert result is False

    @pytest.mark.asyncio
    @patch('storage.lite_llm_manager.LITE_LLM_API_URL', 'https://litellm.example.com')
    async def test_verify_empty_key_returns_false(self):
        """Test that empty key returns False."""
        # Arrange
        byor_key = ''
        user_id = 'user-123'

        # Act
        result = await LiteLlmManager.verify_key(byor_key, user_id)

        # Assert
        assert result is False


class TestGetLlmApiKeyForByor:
    """Test the get_llm_api_key_for_byor endpoint."""

    @pytest.mark.asyncio
    @patch('storage.org_service.OrgService.check_byor_export_enabled')
    @patch('server.routes.api_keys.store_byor_key_in_db')
    @patch('server.routes.api_keys.generate_byor_key')
    @patch('server.routes.api_keys.get_byor_key_from_db')
    async def test_no_key_in_database_generates_new(
        self, mock_get_key, mock_generate_key, mock_store_key, mock_check_enabled
    ):
        """Test that when no key exists in database, a new one is generated."""
        # Arrange
        user_id = 'user-123'
        org_id = uuid.uuid4()
        new_key = 'sk-new-generated-key'
        mock_check_enabled.return_value = True
        mock_get_key.return_value = None
        mock_generate_key.return_value = new_key
        mock_store_key.return_value = None

        # Act
        result = await get_llm_api_key_for_byor(
            user_id=user_id, effective_org_id=org_id
        )

        # Assert
        assert result == LlmApiKeyResponse(key=new_key)
        mock_check_enabled.assert_called_once_with(user_id, org_id=org_id)
        mock_get_key.assert_called_once_with(user_id, org_id)
        mock_generate_key.assert_called_once_with(user_id, org_id)
        mock_store_key.assert_called_once_with(user_id, org_id, new_key)

    @pytest.mark.asyncio
    @patch('storage.org_service.OrgService.check_byor_export_enabled')
    @patch('storage.lite_llm_manager.LiteLlmManager.verify_key')
    @patch('server.routes.api_keys.get_byor_key_from_db')
    async def test_valid_key_in_database_returns_key(
        self, mock_get_key, mock_verify_key, mock_check_enabled
    ):
        """Test that when a valid key exists in database, it is returned."""
        # Arrange
        user_id = 'user-123'
        org_id = uuid.uuid4()
        existing_key = 'sk-existing-valid-key'
        mock_check_enabled.return_value = True
        mock_get_key.return_value = existing_key
        mock_verify_key.return_value = True

        # Act
        result = await get_llm_api_key_for_byor(
            user_id=user_id, effective_org_id=org_id
        )

        # Assert
        assert result == LlmApiKeyResponse(key=existing_key)
        mock_check_enabled.assert_called_once_with(user_id, org_id=org_id)
        mock_get_key.assert_called_once_with(user_id, org_id)
        mock_verify_key.assert_called_once_with(existing_key, user_id)

    @pytest.mark.asyncio
    @patch('storage.org_service.OrgService.check_byor_export_enabled')
    @patch('server.routes.api_keys.store_byor_key_in_db')
    @patch('server.routes.api_keys.generate_byor_key')
    @patch('server.routes.api_keys.delete_byor_key_from_litellm')
    @patch('storage.lite_llm_manager.LiteLlmManager.verify_key')
    @patch('server.routes.api_keys.get_byor_key_from_db')
    async def test_invalid_key_in_database_regenerates(
        self,
        mock_get_key,
        mock_verify_key,
        mock_delete_key,
        mock_generate_key,
        mock_store_key,
        mock_check_enabled,
    ):
        """Test that when an invalid key exists in database, it is regenerated."""
        # Arrange
        user_id = 'user-123'
        org_id = uuid.uuid4()
        invalid_key = 'sk-invalid-key'
        new_key = 'sk-new-generated-key'
        mock_check_enabled.return_value = True
        mock_get_key.return_value = invalid_key
        mock_verify_key.return_value = False
        mock_delete_key.return_value = True
        mock_generate_key.return_value = new_key
        mock_store_key.return_value = None

        # Act
        result = await get_llm_api_key_for_byor(
            user_id=user_id, effective_org_id=org_id
        )

        # Assert
        assert result == LlmApiKeyResponse(key=new_key)
        mock_check_enabled.assert_called_once_with(user_id, org_id=org_id)
        mock_get_key.assert_called_once_with(user_id, org_id)
        mock_verify_key.assert_called_once_with(invalid_key, user_id)
        mock_delete_key.assert_called_once_with(user_id, org_id, invalid_key)
        mock_generate_key.assert_called_once_with(user_id, org_id)
        mock_store_key.assert_called_once_with(user_id, org_id, new_key)

    @pytest.mark.asyncio
    @patch('storage.org_service.OrgService.check_byor_export_enabled')
    @patch('server.routes.api_keys.store_byor_key_in_db')
    @patch('server.routes.api_keys.generate_byor_key')
    @patch('server.routes.api_keys.delete_byor_key_from_litellm')
    @patch('storage.lite_llm_manager.LiteLlmManager.verify_key')
    @patch('server.routes.api_keys.get_byor_key_from_db')
    async def test_invalid_key_deletion_failure_still_regenerates(
        self,
        mock_get_key,
        mock_verify_key,
        mock_delete_key,
        mock_generate_key,
        mock_store_key,
        mock_check_enabled,
    ):
        """Test that even if deletion fails, regeneration still proceeds."""
        # Arrange
        user_id = 'user-123'
        org_id = uuid.uuid4()
        invalid_key = 'sk-invalid-key'
        new_key = 'sk-new-generated-key'
        mock_check_enabled.return_value = True
        mock_get_key.return_value = invalid_key
        mock_verify_key.return_value = False
        mock_delete_key.return_value = False  # Deletion fails
        mock_generate_key.return_value = new_key
        mock_store_key.return_value = None

        # Act
        result = await get_llm_api_key_for_byor(
            user_id=user_id, effective_org_id=org_id
        )

        # Assert
        assert result == LlmApiKeyResponse(key=new_key)
        mock_check_enabled.assert_called_once_with(user_id, org_id=org_id)
        mock_delete_key.assert_called_once_with(user_id, org_id, invalid_key)
        mock_generate_key.assert_called_once_with(user_id, org_id)
        mock_store_key.assert_called_once_with(user_id, org_id, new_key)

    @pytest.mark.asyncio
    @patch('storage.org_service.OrgService.check_byor_export_enabled')
    @patch('server.routes.api_keys.generate_byor_key')
    @patch('server.routes.api_keys.get_byor_key_from_db')
    async def test_key_generation_failure_raises_exception(
        self, mock_get_key, mock_generate_key, mock_check_enabled
    ):
        """Test that when key generation fails, an HTTPException is raised."""
        # Arrange
        user_id = 'user-123'
        mock_check_enabled.return_value = True
        mock_get_key.return_value = None
        mock_generate_key.return_value = None

        # Act & Assert
        with pytest.raises(HTTPException) as exc_info:
            await get_llm_api_key_for_byor(user_id=user_id)

        assert exc_info.value.status_code == 500
        assert 'Failed to generate new BYOR LLM API key' in exc_info.value.detail

    @pytest.mark.asyncio
    @patch('storage.org_service.OrgService.check_byor_export_enabled')
    @patch('server.routes.api_keys.get_byor_key_from_db')
    async def test_database_error_raises_exception(
        self, mock_get_key, mock_check_enabled
    ):
        """Test that database errors are properly handled."""
        # Arrange
        user_id = 'user-123'
        mock_check_enabled.return_value = True
        mock_get_key.side_effect = Exception('Database connection error')

        # Act & Assert
        with pytest.raises(HTTPException) as exc_info:
            await get_llm_api_key_for_byor(user_id=user_id)

        assert exc_info.value.status_code == 500
        assert 'Failed to retrieve BYOR LLM API key' in exc_info.value.detail

    @pytest.mark.asyncio
    @patch('storage.org_service.OrgService.check_byor_export_enabled')
    async def test_byor_export_disabled_returns_402(self, mock_check_enabled):
        """Test that when BYOR export is disabled, 402 is returned."""
        # Arrange
        user_id = 'user-123'
        mock_check_enabled.return_value = False

        # Act & Assert
        with pytest.raises(HTTPException) as exc_info:
            await get_llm_api_key_for_byor(user_id=user_id)

        assert exc_info.value.status_code == 402
        assert 'BYOR key export is not enabled' in exc_info.value.detail


class TestDeleteByorKeyFromLitellm:
    """Test the delete_byor_key_from_litellm function with alias cleanup."""

    @pytest.mark.asyncio
    @patch('storage.lite_llm_manager.LiteLlmManager.delete_key')
    async def test_delete_constructs_alias_from_org(self, mock_delete_key):
        """Test that delete_byor_key_from_litellm builds the key alias from the effective org."""
        # Arrange
        user_id = 'user-123'
        org_id = uuid.uuid4()
        byor_key = 'sk-byor-key-to-delete'
        expected_alias = f'BYOR Key - user {user_id}, org {org_id}'
        mock_delete_key.return_value = None

        # Act
        result = await delete_byor_key_from_litellm(user_id, org_id, byor_key)

        # Assert
        assert result is True
        mock_delete_key.assert_called_once_with(byor_key, key_alias=expected_alias)

    @pytest.mark.asyncio
    @patch('storage.lite_llm_manager.LiteLlmManager.delete_key')
    async def test_delete_returns_false_on_exception(self, mock_delete_key):
        """Test that exceptions during deletion return False."""
        # Arrange
        user_id = 'user-123'
        org_id = uuid.uuid4()
        byor_key = 'sk-byor-key-to-delete'
        mock_delete_key.side_effect = Exception('LiteLLM API error')

        # Act
        result = await delete_byor_key_from_litellm(user_id, org_id, byor_key)

        # Assert
        assert result is False


class TestCheckByorPermitted:
    """Test the check_byor_permitted endpoint."""

    @pytest.mark.asyncio
    @patch('storage.org_service.OrgService.check_byor_export_enabled')
    async def test_permitted_when_enabled(self, mock_check_enabled):
        """Test that permitted=True is returned when BYOR export is enabled."""
        # Arrange
        user_id = 'user-123'
        org_id = uuid.uuid4()
        mock_check_enabled.return_value = True

        # Act
        result = await check_byor_permitted(user_id=user_id, effective_org_id=org_id)

        # Assert
        assert result == ByorPermittedResponse(permitted=True)
        mock_check_enabled.assert_called_once_with(user_id, org_id=org_id)

    @pytest.mark.asyncio
    @patch('storage.org_service.OrgService.check_byor_export_enabled')
    async def test_not_permitted_when_disabled(self, mock_check_enabled):
        """Test that permitted=False is returned when BYOR export is disabled."""
        # Arrange
        user_id = 'user-123'
        org_id = uuid.uuid4()
        mock_check_enabled.return_value = False

        # Act
        result = await check_byor_permitted(user_id=user_id, effective_org_id=org_id)

        # Assert
        assert result == ByorPermittedResponse(permitted=False)
        mock_check_enabled.assert_called_once_with(user_id, org_id=org_id)

    @pytest.mark.asyncio
    @patch('storage.org_service.OrgService.check_byor_export_enabled')
    async def test_error_raises_500(self, mock_check_enabled):
        """Test that an exception raises 500 error."""
        # Arrange
        user_id = 'user-123'
        org_id = uuid.uuid4()
        mock_check_enabled.side_effect = Exception('Database error')

        # Act & Assert
        with pytest.raises(HTTPException) as exc_info:
            await check_byor_permitted(user_id=user_id, effective_org_id=org_id)

        assert exc_info.value.status_code == 500
        assert 'Failed to check BYOR export permission' in exc_info.value.detail


class TestGetCurrentApiKey:
    """Test the get_current_api_key endpoint."""

    @pytest.mark.asyncio
    @patch('server.routes.api_keys.get_user_auth')
    async def test_returns_api_key_info_for_bearer_auth(self, mock_get_user_auth):
        """Test that API key metadata including org_id is returned for bearer token auth."""
        # Arrange
        user_id = 'user-123'
        org_id = uuid.uuid4()
        mock_request = MagicMock()

        user_auth = SaasUserAuth(
            refresh_token=SecretStr('mock-token'),
            user_id=user_id,
            auth_type=AuthType.BEARER,
            api_key_org_id=org_id,
            api_key_id=42,
            api_key_name='My Production Key',
        )
        mock_get_user_auth.return_value = user_auth

        # Act
        result = await get_current_api_key(request=mock_request, user_id=user_id)

        # Assert
        assert isinstance(result, CurrentApiKeyResponse)
        assert result.org_id == str(org_id)
        assert result.id == 42
        assert result.name == 'My Production Key'
        assert result.user_id == user_id
        assert result.auth_type == 'bearer'

    @pytest.mark.asyncio
    @patch('server.routes.api_keys.get_user_auth')
    async def test_returns_400_for_cookie_auth(self, mock_get_user_auth):
        """Test that 400 Bad Request is returned when using cookie authentication."""
        # Arrange
        user_id = 'user-123'
        mock_request = MagicMock()

        mock_user_auth = MagicMock()
        mock_user_auth.get_auth_type.return_value = AuthType.COOKIE
        mock_get_user_auth.return_value = mock_user_auth

        # Act & Assert
        with pytest.raises(HTTPException) as exc_info:
            await get_current_api_key(request=mock_request, user_id=user_id)

        assert exc_info.value.status_code == 400
        assert 'API key authentication' in exc_info.value.detail

    @pytest.mark.asyncio
    @patch('server.routes.api_keys.get_user_auth')
    async def test_returns_400_when_api_key_org_id_is_none(self, mock_get_user_auth):
        """Test that 400 is returned when API key has no org_id (legacy key)."""
        # Arrange
        user_id = 'user-123'
        mock_request = MagicMock()

        user_auth = SaasUserAuth(
            refresh_token=SecretStr('mock-token'),
            user_id=user_id,
            auth_type=AuthType.BEARER,
            api_key_org_id=None,  # No org_id - legacy key
            api_key_id=42,
            api_key_name='Legacy Key',
        )
        mock_get_user_auth.return_value = user_auth

        # Act & Assert
        with pytest.raises(HTTPException) as exc_info:
            await get_current_api_key(request=mock_request, user_id=user_id)

        assert exc_info.value.status_code == 400
        assert 'created before organization support' in exc_info.value.detail