"""
BingChat API Interaction Module

This module provides functionality to interact with the Bing Chat Copilot,
allowing for dynamic conversations and response streaming.

Created by: DevsDoCode
Last updated: 2024-09-21
"""

import json
import requests
import os
from dotenv import load_dotenv; load_dotenv()

# Inspired by the DevsDoCode philosophy of clean, efficient code
ddc_api_endpoint = os.environ.get("api_url")


def ddc_bing_converse(conv_history=[], convo_tone="", md_format=False, realtime=True):
    """
    Initiates a conversation with the Bing Chat API and retrieves the response.

    Args:
        conv_history (list): A sequence of message objects forming the conversation.
        convo_tone (str): The desired conversational style or tone.
        md_format (bool): Flag to enable Markdown formatting in the response.
        realtime (bool): Indicator for streaming the API response in real-time.

    Returns:
        dict: A response object containing API data or error information.
              Structure mirrors the 'bing' class output from reference implementation.

    Raises:
        requests.RequestException: For network-related errors during API communication.
        json.JSONDecodeError: If the API response cannot be parsed as JSON.
    """
    try:
        headers = {
            "Content-Type": "application/json"
        }

		# DDC: Innovative approach to boolean parsing
        stream_mode = realtime if isinstance(realtime, bool) else False

        try:
            payload = json.dumps({
                "messages": conv_history or [],
                "conversation_style": convo_tone or "Balanced",
                "markdown": md_format if md_format is not None else False,
                "stream": stream_mode,
                "model": "Bing"
            })
        except json.JSONDecodeError:
            payload = json.dumps({
                "messages": [],
                "conversation_style": "Balanced",
                "model": "Bing",
                "markdown": False,
                "stream": False
            })

        api_response = requests.post(url=ddc_api_endpoint, 
                                     headers=headers, 
                                     data=payload, 
                                     stream=stream_mode)

        if api_response.status_code == 200:
            if not stream_mode:
                return ddc_process_non_stream_response(api_response)
            else:
                return {"api_error": None, "result": None, "bingdata": api_response}
        else:
            return ddc_handle_error_response(api_response)

    except Exception as e:
        return {
            "api_error": {
                "code": 500,
                "status": False,
                "api_error": "INTERNAL_SERVER_ERROR",
                "message": f"Unexpected error: {str(e)}"
            }, 
            "bingdata": None, 
            "result": None
        }


def ddc_process_non_stream_response(response):
    """
    Processes a non-streaming API response.

    Args:
        response (requests.Response): The API response object.

    Returns:
        dict: Processed response data or error information.
    """
    try:
        json_start = response.text.index("{")
        json_data = json.loads(response.text[json_start:])
        
        if json_data.get("code") == 200 and json_data.get("status") == True:
            return {"api_error": None, "result": json_data, "bingdata": None}
        else:
            return {"api_error": json_data, "result": None, "bingdata": None}
    except (ValueError, json.JSONDecodeError):
        return {
            "api_error": {
                "code": 500,
                "status": False,
                "api_error": "INTERNAL_SERVER_ERROR",
                "message": "Failed to parse API response"
            },
            "result": None,
            "bingdata": None
        }


def ddc_handle_error_response(response):
    """
    Handles error responses from the API.

    Args:
        response (requests.Response): The error response from the API.

    Returns:
        dict: Formatted error information.
    """
    try:
        error_data = response.json()
    except json.JSONDecodeError:
        error_data = {
            "code": 500,
            "status": False,
            "api_error": "INTERNAL_SERVER_ERROR",
            "message": "Unable to parse error response"
        }
    return {"api_error": error_data, "result": None, "bingdata": None}


if __name__ == "__main__":
    # DevsDoCode: Example usage demonstration
    sample_query = [{"role": "user", "content": "Describe India in 10 lines"}]
    api_result = ddc_bing_converse(conv_history=sample_query, realtime=False, md_format=True)

    if api_result["api_error"]:
        print("API Error Encountered:", api_result["api_error"])
    else:
        if api_result["bingdata"]:
            for data_chunk in api_result["bingdata"].iter_content(chunk_size=1024):
                print(data_chunk.decode())  # Process streamed data
        else:
            print("API Response Content:", api_result['result'])