import copy
from fastapi import Request
from typing import Any, Dict, Optional
from litellm.proxy._types import UserAPIKeyAuth
from litellm._logging import verbose_proxy_logger, verbose_logger


def parse_cache_control(cache_control):
    cache_dict = {}
    directives = cache_control.split(", ")

    for directive in directives:
        if "=" in directive:
            key, value = directive.split("=")
            cache_dict[key] = value
        else:
            cache_dict[directive] = True

    return cache_dict


async def add_litellm_data_to_request(
    data: dict,
    request: Request,
    user_api_key_dict: UserAPIKeyAuth,
    general_settings: Optional[Dict[str, Any]] = None,
    version: Optional[str] = None,
):
    # Azure OpenAI only: check if user passed api-version
    query_params = dict(request.query_params)
    if "api-version" in query_params:
        data["api_version"] = query_params["api-version"]

    # Include original request and headers in the data
    data["proxy_server_request"] = {
        "url": str(request.url),
        "method": request.method,
        "headers": dict(request.headers),
        "body": copy.copy(data),  # use copy instead of deepcopy
    }

    ## Cache Controls
    headers = request.headers
    verbose_proxy_logger.debug("Request Headers: %s", headers)
    cache_control_header = headers.get("Cache-Control", None)
    if cache_control_header:
        cache_dict = parse_cache_control(cache_control_header)
        data["ttl"] = cache_dict.get("s-maxage")

    verbose_proxy_logger.debug("receiving data: %s", data)
    # users can pass in 'user' param to /chat/completions. Don't override it
    if data.get("user", None) is None and user_api_key_dict.user_id is not None:
        # if users are using user_api_key_auth, set `user` in `data`
        data["user"] = user_api_key_dict.user_id

    if "metadata" not in data:
        data["metadata"] = {}
    data["metadata"]["user_api_key"] = user_api_key_dict.api_key
    data["metadata"]["user_api_key_alias"] = getattr(
        user_api_key_dict, "key_alias", None
    )
    data["metadata"]["user_api_end_user_max_budget"] = getattr(
        user_api_key_dict, "end_user_max_budget", None
    )
    data["metadata"]["litellm_api_version"] = version

    if general_settings is not None:
        data["metadata"]["global_max_parallel_requests"] = general_settings.get(
            "global_max_parallel_requests", None
        )

    data["metadata"]["user_api_key_user_id"] = user_api_key_dict.user_id
    data["metadata"]["user_api_key_org_id"] = user_api_key_dict.org_id
    data["metadata"]["user_api_key_team_id"] = getattr(
        user_api_key_dict, "team_id", None
    )
    data["metadata"]["user_api_key_team_alias"] = getattr(
        user_api_key_dict, "team_alias", None
    )
    data["metadata"]["user_api_key_metadata"] = user_api_key_dict.metadata
    _headers = dict(request.headers)
    _headers.pop(
        "authorization", None
    )  # do not store the original `sk-..` api key in the db
    data["metadata"]["headers"] = _headers
    data["metadata"]["endpoint"] = str(request.url)
    # Add the OTEL Parent Trace before sending it LiteLLM
    data["litellm_parent_otel_span"] = user_api_key_dict.parent_otel_span

    ### END-USER SPECIFIC PARAMS ###
    if user_api_key_dict.allowed_model_region is not None:
        data["allowed_model_region"] = user_api_key_dict.allowed_model_region
    return data