import os
from collections.abc import Generator

import pytest

from core.model_runtime.entities.llm_entities import LLMResult, LLMResultChunk, LLMResultChunkDelta
from core.model_runtime.entities.message_entities import (
    AssistantPromptMessage,
    PromptMessageTool,
    SystemPromptMessage,
    UserPromptMessage,
)
from core.model_runtime.errors.validate import CredentialsValidateFailedError
from core.model_runtime.model_providers.openai_api_compatible.llm.llm import OAIAPICompatLargeLanguageModel

"""
Using Together.ai's OpenAI-compatible API as testing endpoint
"""


def test_validate_credentials():
    model = OAIAPICompatLargeLanguageModel()

    with pytest.raises(CredentialsValidateFailedError):
        model.validate_credentials(
            model="mistralai/Mixtral-8x7B-Instruct-v0.1",
            credentials={"api_key": "invalid_key", "endpoint_url": "https://api.together.xyz/v1/", "mode": "chat"},
        )

    model.validate_credentials(
        model="mistralai/Mixtral-8x7B-Instruct-v0.1",
        credentials={
            "api_key": os.environ.get("TOGETHER_API_KEY"),
            "endpoint_url": "https://api.together.xyz/v1/",
            "mode": "chat",
        },
    )


def test_invoke_model():
    model = OAIAPICompatLargeLanguageModel()

    response = model.invoke(
        model="mistralai/Mixtral-8x7B-Instruct-v0.1",
        credentials={
            "api_key": os.environ.get("TOGETHER_API_KEY"),
            "endpoint_url": "https://api.together.xyz/v1/",
            "mode": "completion",
        },
        prompt_messages=[
            SystemPromptMessage(
                content="You are a helpful AI assistant.",
            ),
            UserPromptMessage(content="Who are you?"),
        ],
        model_parameters={
            "temperature": 1.0,
            "top_k": 2,
            "top_p": 0.5,
        },
        stop=["How"],
        stream=False,
        user="abc-123",
    )

    assert isinstance(response, LLMResult)
    assert len(response.message.content) > 0


def test_invoke_stream_model():
    model = OAIAPICompatLargeLanguageModel()

    response = model.invoke(
        model="mistralai/Mixtral-8x7B-Instruct-v0.1",
        credentials={
            "api_key": os.environ.get("TOGETHER_API_KEY"),
            "endpoint_url": "https://api.together.xyz/v1/",
            "mode": "chat",
            "stream_mode_delimiter": "\\n\\n",
        },
        prompt_messages=[
            SystemPromptMessage(
                content="You are a helpful AI assistant.",
            ),
            UserPromptMessage(content="Who are you?"),
        ],
        model_parameters={
            "temperature": 1.0,
            "top_k": 2,
            "top_p": 0.5,
        },
        stop=["How"],
        stream=True,
        user="abc-123",
    )

    assert isinstance(response, Generator)

    for chunk in response:
        assert isinstance(chunk, LLMResultChunk)
        assert isinstance(chunk.delta, LLMResultChunkDelta)
        assert isinstance(chunk.delta.message, AssistantPromptMessage)


def test_invoke_stream_model_without_delimiter():
    model = OAIAPICompatLargeLanguageModel()

    response = model.invoke(
        model="mistralai/Mixtral-8x7B-Instruct-v0.1",
        credentials={
            "api_key": os.environ.get("TOGETHER_API_KEY"),
            "endpoint_url": "https://api.together.xyz/v1/",
            "mode": "chat",
        },
        prompt_messages=[
            SystemPromptMessage(
                content="You are a helpful AI assistant.",
            ),
            UserPromptMessage(content="Who are you?"),
        ],
        model_parameters={
            "temperature": 1.0,
            "top_k": 2,
            "top_p": 0.5,
        },
        stop=["How"],
        stream=True,
        user="abc-123",
    )

    assert isinstance(response, Generator)

    for chunk in response:
        assert isinstance(chunk, LLMResultChunk)
        assert isinstance(chunk.delta, LLMResultChunkDelta)
        assert isinstance(chunk.delta.message, AssistantPromptMessage)


# using OpenAI's ChatGPT-3.5 as testing endpoint
def test_invoke_chat_model_with_tools():
    model = OAIAPICompatLargeLanguageModel()

    result = model.invoke(
        model="gpt-3.5-turbo",
        credentials={
            "api_key": os.environ.get("OPENAI_API_KEY"),
            "endpoint_url": "https://api.openai.com/v1/",
            "mode": "chat",
        },
        prompt_messages=[
            SystemPromptMessage(
                content="You are a helpful AI assistant.",
            ),
            UserPromptMessage(
                content="what's the weather today in London?",
            ),
        ],
        tools=[
            PromptMessageTool(
                name="get_weather",
                description="Determine weather in my location",
                parameters={
                    "type": "object",
                    "properties": {
                        "location": {"type": "string", "description": "The city and state e.g. San Francisco, CA"},
                        "unit": {"type": "string", "enum": ["celsius", "fahrenheit"]},
                    },
                    "required": ["location"],
                },
            ),
        ],
        model_parameters={"temperature": 0.0, "max_tokens": 1024},
        stream=False,
        user="abc-123",
    )

    assert isinstance(result, LLMResult)
    assert isinstance(result.message, AssistantPromptMessage)
    assert len(result.message.tool_calls) > 0


def test_get_num_tokens():
    model = OAIAPICompatLargeLanguageModel()

    num_tokens = model.get_num_tokens(
        model="mistralai/Mixtral-8x7B-Instruct-v0.1",
        credentials={"api_key": os.environ.get("OPENAI_API_KEY"), "endpoint_url": "https://api.openai.com/v1/"},
        prompt_messages=[
            SystemPromptMessage(
                content="You are a helpful AI assistant.",
            ),
            UserPromptMessage(content="Hello World!"),
        ],
    )

    assert isinstance(num_tokens, int)
    assert num_tokens == 21