api/utils.py

from datetime import datetime
from http.client import HTTPException
import json
from typing import Any, Dict, Optional
import uuid

import httpx
from api import validate
from api.config import MODEL_MAPPING, headers, AGENT_MODE, TRENDING_AGENT_MODE
from fastapi import Depends, HTTPException as FastAPIHTTPException
from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer

from api.config import APP_SECRET, BASE_URL
from api.models import ChatRequest

from api.logger import setup_logger

logger = setup_logger(__name__)

# Initialize HTTPBearer for security dependency
security = HTTPBearer()

def create_chat_completion_data(
    content: str, model: str, timestamp: int, finish_reason: Optional[str] = None
) -> Dict[str, Any]:
    """
    Create a dictionary representing a chat completion chunk.

    Args:
        content (str): The content of the message.
        model (str): The model used for the chat.
        timestamp (int): The timestamp of the creation.
        finish_reason (Optional[str], optional): The reason for finishing. Defaults to None.

    Returns:
        Dict[str, Any]: A dictionary representing the chat completion chunk.
    """
    return {
        "id": f"chatcmpl-{uuid.uuid4()}",
        "object": "chat.completion.chunk",
        "created": timestamp,
        "model": model,
        "choices": [
            {
                "index": 0,
                "delta": {"content": content, "role": "assistant"},
                "finish_reason": finish_reason,
            }
        ],
        "usage": None,
    }

def verify_app_secret(credentials: HTTPAuthorizationCredentials = Depends(security)):
    """
    Verify the application secret from the HTTP authorization credentials.

    Args:
        credentials (HTTPAuthorizationCredentials, optional): The HTTP authorization credentials. Defaults to Depends(security).

    Raises:
        HTTPException: If the APP_SECRET does not match.

    Returns:
        str: The verified credentials.
    """
    if credentials.credentials != APP_SECRET:
        raise FastAPIHTTPException(status_code=403, detail="Invalid APP_SECRET")
    return credentials.credentials

def message_to_dict(message):
    """
    Convert a message object to a dictionary.

    Args:
        message: The message object to convert.

    Returns:
        Dict[str, Any]: The dictionary representation of the message.
    """
    if isinstance(message.content, str):
        return {"role": message.role, "content": message.content}
    elif isinstance(message.content, list) and len(message.content) == 2:
        return {
            "role": message.role,
            "content": message.content[0]["text"],
            "data": {
                "imageBase64": message.content[1]["image_url"]["url"],
                "fileText": "",
                "title": "snapshot",
            },
        }
    else:
        return {"role": message.role, "content": message.content}

async def process_streaming_response(request: ChatRequest):
    """
    Process a streaming response from the chat API.

    Args:
        request (ChatRequest): The chat request containing all necessary information.

    Yields:
        str: The streaming data chunks formatted as server-sent events.
    """
    agent_mode = AGENT_MODE.get(request.model, {})
    trending_agent_mode = TRENDING_AGENT_MODE.get(request.model, {})

    # Log reduced information
    logger.info(
        f"Streaming request for model: '{request.model}', "
        f"agent mode: {agent_mode}, trending agent mode: {trending_agent_mode}"
    )

    json_data = {
        "messages": [message_to_dict(msg) for msg in request.messages],
        "previewToken": None,
        "userId": None,
        "codeModelMode": True,
        "agentMode": agent_mode,
        "trendingAgentMode": trending_agent_mode,
        "isMicMode": False,
        "userSystemPrompt": None,
        "maxTokens": request.max_tokens,
        "playgroundTopP": request.top_p,
        "playgroundTemperature": request.temperature,
        "isChromeExt": False,
        "githubToken": None,
        "clickedAnswer2": False,
        "clickedAnswer3": False,
        "clickedForceWebSearch": False,
        "visitFromDelta": False,
        "mobileClient": False,
        "userSelectedModel": MODEL_MAPPING.get(request.model),
        "validated": validate.getHid()
    }

    async with httpx.AsyncClient() as client:
        try:
            async with client.stream(
                "POST",
                f"{BASE_URL}/api/chat",
                headers=headers,
                json=json_data,
                timeout=100,
            ) as response:
                response.raise_for_status()
                timestamp = int(datetime.now().timestamp())
                async for line in response.aiter_lines():
                    if line:
                        content = line + "\n"
                        if "https://www.blackbox.ai" in content:
                            validate.getHid(True)
                            content = "Hid has been refreshed; feel free to restart the conversation.\n"
                            yield f"data: {json.dumps(create_chat_completion_data(content, request.model, timestamp))}\n\n"
                            break
                        # Remove the specific pattern without affecting markdown
                        content = content.replace("$@$v=undefined-rv1$@$", "")
                        yield f"data: {json.dumps(create_chat_completion_data(content, request.model, timestamp))}\n\n"

                # Indicate the end of the stream
                yield f"data: {json.dumps(create_chat_completion_data('', request.model, timestamp, 'stop'))}\n\n"
                yield "data: [DONE]\n\n"
        except httpx.HTTPStatusError as e:
            logger.error(f"HTTP error occurred: {e}")
            raise FastAPIHTTPException(status_code=e.response.status_code, detail=str(e))
        except httpx.RequestError as e:
            logger.error(f"Error occurred during request: {e}")
            raise FastAPIHTTPException(status_code=500, detail=str(e))

async def process_non_streaming_response(request: ChatRequest):
    """
    Process a non-streaming response from the chat API.

    Args:
        request (ChatRequest): The chat request containing all necessary information.

    Returns:
        Dict[str, Any]: The full response from the chat API formatted appropriately.
    """
    agent_mode = AGENT_MODE.get(request.model, {})
    trending_agent_mode = TRENDING_AGENT_MODE.get(request.model, {})

    # Log reduced information
    logger.info(
        f"Non-streaming request for model: '{request.model}', "
        f"agent mode: {agent_mode}, trending agent mode: {trending_agent_mode}"
    )

    json_data = {
        "messages": [message_to_dict(msg) for msg in request.messages],
        "previewToken": None,
        "userId": None,
        "codeModelMode": True,
        "agentMode": agent_mode,
        "trendingAgentMode": trending_agent_mode,
        "isMicMode": False,
        "userSystemPrompt": None,
        "maxTokens": request.max_tokens,
        "playgroundTopP": request.top_p,
        "playgroundTemperature": request.temperature,
        "isChromeExt": False,
        "githubToken": None,
        "clickedAnswer2": False,
        "clickedAnswer3": False,
        "clickedForceWebSearch": False,
        "visitFromDelta": False,
        "mobileClient": False,
        "userSelectedModel": MODEL_MAPPING.get(request.model),
        "validated": validate.getHid()
    }

    full_response = ""
    async with httpx.AsyncClient() as client:
        try:
            async with client.stream(
                method="POST",
                url=f"{BASE_URL}/api/chat",
                headers=headers,
                json=json_data,
                timeout=100,
            ) as response:
                response.raise_for_status()
                async for chunk in response.aiter_text():
                    full_response += chunk

            if "https://www.blackbox.ai" in full_response:
                validate.getHid(True)
                full_response = "Hid has been refreshed; feel free to restart the conversation."

            # Remove the specific pattern without affecting markdown
            full_response = full_response.replace("$@$v=undefined-rv1$@$", "")

            return {
                "id": f"chatcmpl-{uuid.uuid4()}",
                "object": "chat.completion",
                "created": int(datetime.now().timestamp()),
                "model": request.model,
                "choices": [
                    {
                        "index": 0,
                        "message": {"role": "assistant", "content": full_response},
                        "finish_reason": "stop",
                    }
                ],
                "usage": None,
            }
        except httpx.HTTPStatusError as e:
            logger.error(f"HTTP error occurred: {e}")
            raise FastAPIHTTPException(status_code=e.response.status_code, detail=str(e))
        except httpx.RequestError as e:
            logger.error(f"Error occurred during request: {e}")
            raise FastAPIHTTPException(status_code=500, detail=str(e))