from datetime import datetime
import json
import uuid
from typing import Any, Dict, Optional

import httpx
from fastapi import Depends, HTTPException
from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer

from api import validate
from api.config import (
    APP_SECRET,
    BASE_URL,
    MODEL_MAPPING,
    AGENT_MODE,
    TRENDING_AGENT_MODE,
    MODEL_PREFIXES,
    headers,
)
from api.models import ChatRequest
from api.logger import setup_logger

logger = setup_logger(__name__)
security = HTTPBearer()

def create_chat_completion_data(
    content: str, model: str, timestamp: int, finish_reason: Optional[str] = None
) -> Dict[str, Any]:
    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)):
    if credentials.credentials != APP_SECRET:
        raise HTTPException(status_code=403, detail="Invalid APP_SECRET")
    return credentials.credentials

def message_to_dict(message, model_prefix: Optional[str] = None):
    content = message.content
    if isinstance(content, list) and len(content) == 2 and "image_url" in content[1]:
        # Handle messages with image data
        content_text = content[0]["text"]
        if model_prefix:
            content_text = f"{model_prefix} {content_text}"
        return {
            "role": message.role,
            "content": content_text,
            "data": {
                "imageBase64": content[1]["image_url"]["url"],
                "fileText": "",
                "title": "snapshot",
            },
        }
    else:
        if model_prefix:
            content = f"{model_prefix} {content}"
        return {"role": message.role, "content": content}

async def process_streaming_response(request: ChatRequest):
    model = request.model  # Use the requested model directly
    agent_mode = AGENT_MODE.get(model, {})
    trending_agent_mode = TRENDING_AGENT_MODE.get(model, {})
    model_prefix = MODEL_PREFIXES.get(model, "")

    hid = validate.getHid()
    logger.info(f"Using hid: {hid} for model: {model}")

    json_data = {
        "messages": [message_to_dict(msg, model_prefix=model_prefix) 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,  # Use the requested model
        "validated": hid
    }

    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()
                async for line in response.aiter_lines():
                    timestamp = int(datetime.now().timestamp())
                    if line:
                        content = line
                        if "https://www.blackbox.ai" in content:
                            validate.getHid(True)
                            content = "hid已刷新,重新对话即可"
                            logger.info(f"hid refreshed due to content: {content}")
                            yield f"data: {json.dumps(create_chat_completion_data(content, model, timestamp))}\n\n"
                            break
                        if content.startswith("$@$v=undefined-rv1$@$"):
                            content = content[21:]
                        # Do not strip model prefix or modify content
                        yield f"data: {json.dumps(create_chat_completion_data(content, model, timestamp))}\n\n"

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

async def process_non_streaming_response(request: ChatRequest):
    model = request.model  # Use the requested model directly
    agent_mode = AGENT_MODE.get(model, {})
    trending_agent_mode = TRENDING_AGENT_MODE.get(model, {})
    model_prefix = MODEL_PREFIXES.get(model, "")

    hid = validate.getHid()
    logger.info(f"Using hid: {hid} for model: {model}")

    json_data = {
        "messages": [message_to_dict(msg, model_prefix=model_prefix) 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,  # Use the requested model
        "validated": hid
    }
    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
            ) as response:
                response.raise_for_status()
                async for chunk in response.aiter_text():
                    full_response += chunk
        except httpx.HTTPStatusError as e:
            logger.error(f"HTTP error occurred: {e}")
            raise HTTPException(status_code=e.response.status_code, detail=str(e))
        except httpx.RequestError as e:
            logger.error(f"Error occurred during request: {e}")
            raise HTTPException(status_code=500, detail=str(e))

    if "https://www.blackbox.ai" in full_response:
        validate.getHid(True)
        full_response = "hid已刷新，重新对话即可"
        logger.info("hid refreshed due to response content")

    if full_response.startswith("$@$v=undefined-rv1$@$"):
        full_response = full_response[21:]
    # Do not strip model prefix or modify content
    return {
        "id": f"chatcmpl-{uuid.uuid4()}",
        "object": "chat.completion",
        "created": int(datetime.now().timestamp()),
        "model": model,
        "choices": [
            {
                "index": 0,
                "message": {"role": "assistant", "content": full_response},
                "finish_reason": "stop",
            }
        ],
        "usage": None,
    }