#### What this tests ####
#    This tests caching on the router
import asyncio
import os
import time
import traceback
from unittest.mock import patch
from typing import Union
import pytest

import litellm
from litellm import Router
from litellm.caching import RedisCache, RedisClusterCache


## Scenarios
## 1. 2 models - openai + azure - 1 model group "gpt-3.5-turbo",
## 2. 2 models - openai, azure - 2 diff model groups, 1 caching group


@pytest.mark.asyncio
async def test_router_async_caching_with_ssl_url():
    """
    Tests when a redis url is passed to the router, if caching is correctly setup
    """
    try:
        router = Router(
            model_list=[
                {
                    "model_name": "gpt-3.5-turbo",
                    "litellm_params": {
                        "model": "gpt-3.5-turbo",
                        "api_key": os.getenv("OPENAI_API_KEY"),
                    },
                    "tpm": 100000,
                    "rpm": 10000,
                },
            ],
            redis_url=os.getenv("REDIS_SSL_URL"),
        )

        response = await router.cache.redis_cache.ping()
        print(f"response: {response}")
        assert response == True
    except Exception as e:
        pytest.fail(f"An exception occurred - {str(e)}")


def test_router_sync_caching_with_ssl_url():
    """
    Tests when a redis url is passed to the router, if caching is correctly setup
    """
    try:
        router = Router(
            model_list=[
                {
                    "model_name": "gpt-3.5-turbo",
                    "litellm_params": {
                        "model": "gpt-3.5-turbo",
                        "api_key": os.getenv("OPENAI_API_KEY"),
                    },
                    "tpm": 100000,
                    "rpm": 10000,
                },
            ],
            redis_url=os.getenv("REDIS_SSL_URL"),
        )

        response = router.cache.redis_cache.sync_ping()
        print(f"response: {response}")
        assert response == True
    except Exception as e:
        pytest.fail(f"An exception occurred - {str(e)}")


@pytest.mark.asyncio
@pytest.mark.flaky(retries=3, delay=1)
async def test_acompletion_caching_on_router():
    # tests acompletion + caching on router
    try:
        litellm.set_verbose = True
        model_list = [
            {
                "model_name": "gpt-4.1-nano",
                "litellm_params": {
                    "model": "gpt-4.1-nano",
                    "api_key": os.getenv("OPENAI_API_KEY"),
                    "mock_response": "Hello world",
                },
                "tpm": 100000,
                "rpm": 10000,
            },
        ]

        messages = [
            {"role": "user", "content": f"write a one sentence poem {time.time()}?"}
        ]
        start_time = time.time()
        router = Router(
            model_list=model_list,
            redis_host=os.environ["REDIS_HOST"],
            redis_password=os.environ["REDIS_PASSWORD"],
            redis_port=os.environ["REDIS_PORT"],
            cache_responses=True,
            timeout=30,
            routing_strategy="simple-shuffle",
        )
        response1 = await router.acompletion(
            model="gpt-4.1-nano", messages=messages, temperature=1
        )
        print(f"response1: {response1}")
        await asyncio.sleep(5)  # add cache is async, async sleep for cache to get set

        response2 = await router.acompletion(
            model="gpt-4.1-nano", messages=messages, temperature=1
        )
        print(f"response2: {response2}")
        assert response1.id == response2.id
        assert len(response1.choices[0].message.content) > 0
        assert (
            response1.choices[0].message.content == response2.choices[0].message.content
        )
        router.reset()
    except litellm.Timeout as e:
        end_time = time.time()
        print(f"timeout error occurred: {end_time - start_time}")
        pass
    except Exception as e:
        traceback.print_exc()
        pytest.fail(f"Error occurred: {e}")


@pytest.mark.asyncio
@pytest.mark.flaky(retries=3, delay=1)
async def test_completion_caching_on_router():
    # tests completion + caching on router
    try:
        litellm.set_verbose = True
        model_list = [
            {
                "model_name": "gpt-3.5-turbo",
                "litellm_params": {
                    "model": "gpt-3.5-turbo",
                    "api_key": os.getenv("OPENAI_API_KEY"),
                },
                "tpm": 1000,
                "rpm": 1,
            },
        ]

        messages = [
            {"role": "user", "content": f"write a one sentence poem {time.time()}?"}
        ]
        router = Router(
            model_list=model_list,
            redis_host=os.environ["REDIS_HOST"],
            redis_password=os.environ["REDIS_PASSWORD"],
            redis_port=os.environ["REDIS_PORT"],
            cache_responses=True,
            timeout=30,
            routing_strategy_args={"ttl": 10},
            routing_strategy="usage-based-routing",
        )
        response1 = await router.acompletion(
            model="gpt-3.5-turbo", messages=messages, temperature=1
        )
        print(f"response1: {response1}")
        await asyncio.sleep(10)
        response2 = await router.acompletion(
            model="gpt-3.5-turbo", messages=messages, temperature=1
        )
        print(f"response2: {response2}")
        assert len(response1.choices[0].message.content) > 0
        assert len(response2.choices[0].message.content) > 0

        router.reset()
    except litellm.Timeout as e:
        pass
    except Exception as e:
        traceback.print_exc()
        pytest.fail(f"Error occurred: {e}")


@pytest.mark.asyncio
async def test_acompletion_caching_with_ttl_on_router():
    # tests acompletion + caching on router
    try:
        litellm.set_verbose = True
        model_list = [
            {
                "model_name": "gpt-3.5-turbo",
                "litellm_params": {
                    "model": "gpt-3.5-turbo",
                    "api_key": os.getenv("OPENAI_API_KEY"),
                },
                "tpm": 100000,
                "rpm": 10000,
            },
            {
                "model_name": "gpt-3.5-turbo",
                "litellm_params": {
                    "model": "gpt-4.1-nano",
                    "api_key": os.getenv("OPENAI_API_KEY"),
                },
                "tpm": 100000,
                "rpm": 10000,
            },
        ]

        messages = [
            {"role": "user", "content": f"write a one sentence poem {time.time()}?"}
        ]
        start_time = time.time()
        router = Router(
            model_list=model_list,
            redis_host=os.environ["REDIS_HOST"],
            redis_password=os.environ["REDIS_PASSWORD"],
            redis_port=os.environ["REDIS_PORT"],
            cache_responses=True,
            timeout=30,
            routing_strategy="simple-shuffle",
        )
        response1 = await router.acompletion(
            model="gpt-3.5-turbo", messages=messages, temperature=1, ttl=0
        )
        print(f"response1: {response1}")
        await asyncio.sleep(1)  # add cache is async, async sleep for cache to get set
        response2 = await router.acompletion(
            model="gpt-3.5-turbo", messages=messages, temperature=1, ttl=0
        )
        print(f"response2: {response2}")
        assert response1.id != response2.id
        assert len(response1.choices[0].message.content) > 0
        assert (
            response1.choices[0].message.content != response2.choices[0].message.content
        )
        router.reset()
    except litellm.Timeout as e:
        end_time = time.time()
        print(f"timeout error occurred: {end_time - start_time}")
        pass
    except Exception as e:
        traceback.print_exc()
        pytest.fail(f"Error occurred: {e}")


@pytest.mark.asyncio
async def test_acompletion_caching_on_router_caching_groups():
    # tests acompletion + caching on router
    try:
        litellm.set_verbose = True
        model_list = [
            {
                "model_name": "openai-gpt-3.5-turbo",
                "litellm_params": {
                    "model": "gpt-3.5-turbo",
                    "api_key": os.getenv("OPENAI_API_KEY"),
                    "mock_response": "Hello world",
                },
                "tpm": 100000,
                "rpm": 10000,
            },
            {
                "model_name": "azure-gpt-3.5-turbo",
                "litellm_params": {
                    "model": "azure/gpt-4.1-mini",
                    "api_key": os.getenv("AZURE_AI_API_KEY"),
                    "api_base": os.getenv("AZURE_AI_API_BASE"),
                    "api_version": os.getenv("AZURE_API_VERSION"),
                },
                "tpm": 100000,
                "rpm": 10000,
            },
        ]

        messages = [
            {"role": "user", "content": f"write a one sentence poem {time.time()}?"}
        ]
        start_time = time.time()
        router = Router(
            model_list=model_list,
            redis_host=os.environ["REDIS_HOST"],
            redis_password=os.environ["REDIS_PASSWORD"],
            redis_port=os.environ["REDIS_PORT"],
            cache_responses=True,
            timeout=30,
            routing_strategy="simple-shuffle",
            caching_groups=[("openai-gpt-3.5-turbo", "azure-gpt-3.5-turbo")],
        )
        response1 = await router.acompletion(
            model="openai-gpt-3.5-turbo", messages=messages, temperature=1
        )
        print(f"response1: {response1}")
        await asyncio.sleep(1)  # add cache is async, async sleep for cache to get set
        response2 = await router.acompletion(
            model="azure-gpt-3.5-turbo", messages=messages, temperature=1
        )
        print(f"response2: {response2}")
        assert response1.id == response2.id
        assert len(response1.choices[0].message.content) > 0
        assert (
            response1.choices[0].message.content == response2.choices[0].message.content
        )
        router.reset()
    except litellm.Timeout as e:
        end_time = time.time()
        print(f"timeout error occurred: {end_time - start_time}")
        pass
    except Exception as e:
        traceback.print_exc()
        pytest.fail(f"Error occurred: {e}")


@pytest.mark.parametrize(
    "startup_nodes, expected_cache_type",
    [
        pytest.param(
            [dict(host="node1.localhost", port=6379)],
            RedisClusterCache,
            id="Expects a RedisClusterCache instance when startup_nodes provided",
        ),
        pytest.param(
            None,
            RedisCache,
            id="Expects a RedisCache instance when there is no startup nodes",
        ),
    ],
)
def test_create_correct_redis_cache_instance(
    startup_nodes: Union[list[dict], None],
    expected_cache_type: Union[type[RedisClusterCache], type[RedisCache]],
):
    cache_config = dict(
        host="mockhost",
        port=6379,
        password="mock-password",
        startup_nodes=startup_nodes,
    )

    def _mock_redis_cache_init(*args, **kwargs): ...

    with patch.object(RedisCache, "__init__", _mock_redis_cache_init):
        redis_cache = Router._create_redis_cache(cache_config)
        assert isinstance(redis_cache, expected_cache_type)
