import os, json
from enum import Enum
import requests
import time
from typing import Callable
from litellm.utils import ModelResponse


class TogetherAIError(Exception):
    def __init__(self, status_code, message):
        self.status_code = status_code
        self.message = message
        super().__init__(
            self.message
        )  # Call the base class constructor with the parameters it needs


class TogetherAILLM:
    def __init__(self, encoding, logging_obj, api_key=None):
        self.encoding = encoding
        self.completion_url = "https://api.together.xyz/inference"
        self.api_key = api_key
        self.logging_obj = logging_obj
        self.validate_environment(api_key=api_key)

    def validate_environment(
        self, api_key
    ):  # set up the environment required to run the model
        # set the api key
        if self.api_key == None:
            raise ValueError(
                "Missing TogetherAI API Key - A call is being made to together_ai but no key is set either in the environment variables or via params"
            )
        self.api_key = api_key
        self.headers = {
            "accept": "application/json",
            "content-type": "application/json",
            "Authorization": "Bearer " + self.api_key,
        }

    def completion(
        self,
        model: str,
        messages: list,
        model_response: ModelResponse,
        print_verbose: Callable,
        optional_params=None,
        litellm_params=None,
        logger_fn=None,
    ):  # logic for parsing in - calling - parsing out model completion calls
        model = model
        prompt = ""
        for message in messages:
            if "role" in message:
                if message["role"] == "user":
                    prompt += f"{message['content']}"
                else:
                    prompt += f"{message['content']}"
            else:
                prompt += f"{message['content']}"
        data = {
            "model": model,
            "prompt": prompt,
            "request_type": "language-model-inference",
            **optional_params,
        }

        ## LOGGING
        self.logging_obj.pre_call(
            input=prompt,
            api_key=self.api_key,
            additional_args={"complete_input_dict": data},
        )
        ## COMPLETION CALL
        if (
                "stream_tokens" in optional_params
                and optional_params["stream_tokens"] == True
            ):
            response = requests.post(
                self.completion_url,
                headers=self.headers,
                data=json.dumps(data),
                stream=optional_params["stream_tokens"],
            )
            return response.iter_lines()
        else:
            response = requests.post(
                self.completion_url,
                headers=self.headers,
                data=json.dumps(data)
            )
            ## LOGGING
            self.logging_obj.post_call(
                input=prompt,
                api_key=self.api_key,
                original_response=response.text,
                additional_args={"complete_input_dict": data},
            )
            print_verbose(f"raw model_response: {response.text}")
            ## RESPONSE OBJECT
            completion_response = response.json()

            if "error" in completion_response:
                raise TogetherAIError(
                    message=json.dumps(completion_response),
                    status_code=response.status_code,
                )
            elif "error" in completion_response["output"]:
                raise TogetherAIError(message=json.dumps(completion_response["output"]), status_code=response.status_code)
            
            completion_response = completion_response["output"]["choices"][0]["text"]

            ## CALCULATING USAGE - baseten charges on time, not tokens - have some mapping of cost here.
            prompt_tokens = len(self.encoding.encode(prompt))
            completion_tokens = len(
                self.encoding.encode(completion_response)
            )
            model_response["choices"][0]["message"]["content"] = completion_response
            model_response["created"] = time.time()
            model_response["model"] = model
            model_response["usage"] = {
                "prompt_tokens": prompt_tokens,
                "completion_tokens": completion_tokens,
                "total_tokens": prompt_tokens + completion_tokens,
            }
            return model_response

    def embedding(
        self,
    ):  # logic for parsing in - calling - parsing out model embedding calls
        pass