import os
import logging
from openai import OpenAI # For type hinting and default client creation if needed
from openai_compatible_inference_bot import OpenAICompatibleInferenceBot
from telegram_helper import TelegramHelper # Used in main

class GeminiTelegramInferenceBot(OpenAICompatibleInferenceBot):
    DEFAULT_GEMINI_API_BASE_URL = "https://generativelanguage.googleapis.com/v1beta"
    DEFAULT_SMALL_MODEL_NAME = "gemini-pro" # Actual model name for Gemini, not via OpenAI client directly
    DEFAULT_LARGE_MODEL_NAME = "gemini-1.5-pro-latest"
    DEFAULT_SMALL_MODEL_MAX_TOKENS = "2048" # Gemini uses outputTokenLimit, not exactly max_tokens in OpenAI sense
    DEFAULT_LARGE_MODEL_MAX_TOKENS = "8192"

    def __init__(
        self,
        client: OpenAI | None = None, # OpenAI client for compatible mode
        api_key: str | None = None, # Gemini API Key
        base_url: str | None = None, # Gemini API Base URL for OpenAI client
        small_model_name: str | None = None,
        small_model_max_tokens: str | None = None,
        large_model_name: str | None = None,
        large_model_max_tokens: str | None = None,
        system_prompt_content: str | None = None,
        system_prompt_path: str | None = None
    ):
        _api_key = api_key or os.environ.get("GEMINI_API_KEY")
        _base_url = base_url or os.environ.get("GEMINI_API_BASE_URL") or self.DEFAULT_GEMINI_API_BASE_URL

        if not _api_key:
            # This check might seem redundant if super() also checks, but it's good for clarity
            # for this specific bot type if it were to be instantiated directly with missing critical env vars.
            raise ValueError("Gemini API key must be provided either via api_key argument or GEMINI_API_KEY environment variable.")

        self.small_model_name = small_model_name or os.environ.get("GEMINI_SMALL_MODEL") or self.DEFAULT_SMALL_MODEL_NAME
        self.small_model_max_tokens_str = small_model_max_tokens or os.environ.get("GEMINI_SMALL_MODEL_MAX_TOKENS") or self.DEFAULT_SMALL_MODEL_MAX_TOKENS
        
        self.large_model_name = large_model_name or os.environ.get("GEMINI_LARGE_MODEL") or self.DEFAULT_LARGE_MODEL_NAME
        self.large_model_max_tokens_str = large_model_max_tokens or os.environ.get("GEMINI_LARGE_MODEL_MAX_TOKENS") or self.DEFAULT_LARGE_MODEL_MAX_TOKENS
        
        # Pass parameters to the OpenAICompatibleInferenceBot constructor
        # It will create an OpenAI client configured for the Gemini endpoint
        super().__init__(
            client=client, 
            api_key=_api_key, # This key will be used by OpenAI client for the custom base_url
            model_name=self.small_model_name, # Initial model
            max_tokens_str=self.small_model_max_tokens_str, 
            system_prompt_content=system_prompt_content,
            system_prompt_path=system_prompt_path,
            base_url=_base_url, # Crucial for Gemini via OpenAI client
            is_gemini=True # Flag for specific Gemini handling in compatible layer if needed
        )
        # self.client will be set by OpenAICompatibleInferenceBot with base_url and api_key.
        # Logging to confirm Gemini specific setup
        logging.info(f"GeminiTelegramInferenceBot initialized to use model {self.model} via {_base_url}")

    async def switch_model(self):
        if not self.small_model_name or not self.large_model_name:
            logging.warning("Small or Large model names for Gemini are not defined. Cannot switch model.")
            return f"Model switching not fully configured. Currently using {self.model}."

        current_is_small = self.model == self.small_model_name
        current_is_large = self.model == self.large_model_name

        if current_is_large:
            target_model = self.small_model_name
            target_max_tokens_str = self.small_model_max_tokens_str
        elif current_is_small:
            target_model = self.large_model_name
            target_max_tokens_str = self.large_model_max_tokens_str
        else:
            logging.warning(f"Current model {self.model} is unrecognized for Gemini bot. Switching to default small model: {self.small_model_name}.")
            target_model = self.small_model_name
            target_max_tokens_str = self.small_model_max_tokens_str

        self._configure_model_and_tokens(target_model, target_max_tokens_str)
        logging.info(f"Switched to Gemini model: {self.model}")
        # For Gemini, max_tokens might translate to outputTokenLimit, so be clear it's a configuration parameter
        return f"Switched to Gemini model: {self.model} (Configured Max Tokens: {self.max_tokens if self.max_tokens is not None else 'API default'})"

def main():
    logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')

    # GEMINI_API_KEY is crucial for this bot
    if not os.environ.get("GEMINI_API_KEY"):
        logging.error("FATAL: GEMINI_API_KEY environment variable not set.")
        return
    # GEMINI_API_BASE_URL is also important, but constructor has a default

    try:
        bot = GeminiTelegramInferenceBot(
            # api_key and base_url will be picked from ENV by constructor if not passed
        )
    except ValueError as e:
        logging.error(f"FATAL: {e}")
        return
    except Exception as e: # Catch any other init errors
        logging.error(f"An unexpected error occurred during bot initialization: {e}")
        return

    telegram_helper = TelegramHelper(bot)
    telegram_helper.run()

if __name__ == '__main__':
    main()