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, UserPromptMessage
from core.model_runtime.errors.validate import CredentialsValidateFailedError
from core.model_runtime.model_providers.volcengine_maas.llm.llm import VolcengineMaaSLargeLanguageModel


def test_validate_credentials_for_chat_model():
    model = VolcengineMaaSLargeLanguageModel()

    with pytest.raises(CredentialsValidateFailedError):
        model.validate_credentials(
            model='NOT IMPORTANT',
            credentials={
                'api_endpoint_host': 'maas-api.ml-platform-cn-beijing.volces.com',
                'volc_region': 'cn-beijing',
                'volc_access_key_id': 'INVALID',
                'volc_secret_access_key': 'INVALID',
                'endpoint_id': 'INVALID',
            }
        )

    model.validate_credentials(
        model='NOT IMPORTANT',
        credentials={
            'api_endpoint_host': 'maas-api.ml-platform-cn-beijing.volces.com',
            'volc_region': 'cn-beijing',
            'volc_access_key_id': os.environ.get('VOLC_API_KEY'),
            'volc_secret_access_key': os.environ.get('VOLC_SECRET_KEY'),
            'endpoint_id': os.environ.get('VOLC_MODEL_ENDPOINT_ID'),
        }
    )


def test_invoke_model():
    model = VolcengineMaaSLargeLanguageModel()

    response = model.invoke(
        model='NOT IMPORTANT',
        credentials={
            'api_endpoint_host': 'maas-api.ml-platform-cn-beijing.volces.com',
            'volc_region': 'cn-beijing',
            'volc_access_key_id': os.environ.get('VOLC_API_KEY'),
            'volc_secret_access_key': os.environ.get('VOLC_SECRET_KEY'),
            'endpoint_id': os.environ.get('VOLC_MODEL_ENDPOINT_ID'),
            'base_model_name': 'Skylark2-pro-4k',
        },
        prompt_messages=[
            UserPromptMessage(
                content='Hello World!'
            )
        ],
        model_parameters={
            'temperature': 0.7,
            'top_p': 1.0,
            'top_k': 1,
        },
        stop=['you'],
        user="abc-123",
        stream=False
    )

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


def test_invoke_stream_model():
    model = VolcengineMaaSLargeLanguageModel()

    response = model.invoke(
        model='NOT IMPORTANT',
        credentials={
            'api_endpoint_host': 'maas-api.ml-platform-cn-beijing.volces.com',
            'volc_region': 'cn-beijing',
            'volc_access_key_id': os.environ.get('VOLC_API_KEY'),
            'volc_secret_access_key': os.environ.get('VOLC_SECRET_KEY'),
            'endpoint_id': os.environ.get('VOLC_MODEL_ENDPOINT_ID'),
            'base_model_name': 'Skylark2-pro-4k',
        },
        prompt_messages=[
            UserPromptMessage(
                content='Hello World!'
            )
        ],
        model_parameters={
            'temperature': 0.7,
            'top_p': 1.0,
            'top_k': 1,
        },
        stop=['you'],
        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)
        assert len(
            chunk.delta.message.content) > 0 if chunk.delta.finish_reason is None else True


def test_get_num_tokens():
    model = VolcengineMaaSLargeLanguageModel()

    response = model.get_num_tokens(
        model='NOT IMPORTANT',
        credentials={
            'api_endpoint_host': 'maas-api.ml-platform-cn-beijing.volces.com',
            'volc_region': 'cn-beijing',
            'volc_access_key_id': os.environ.get('VOLC_API_KEY'),
            'volc_secret_access_key': os.environ.get('VOLC_SECRET_KEY'),
            'endpoint_id': os.environ.get('VOLC_MODEL_ENDPOINT_ID'),
            'base_model_name': 'Skylark2-pro-4k',
        },
        prompt_messages=[
            UserPromptMessage(
                content='Hello World!'
            )
        ],
        tools=[]
    )

    assert isinstance(response, int)
    assert response == 6