#### END-USER/CUSTOMER MANAGEMENT ####
import asyncio
import copy
import json
import re
import secrets
import time
import traceback
import uuid
from datetime import datetime, timedelta, timezone
from typing import List, Optional

import fastapi
from fastapi import APIRouter, Depends, Header, HTTPException, Request, status

import litellm
from litellm._logging import verbose_proxy_logger
from litellm.proxy._types import *
from litellm.proxy.auth.user_api_key_auth import user_api_key_auth
from litellm.proxy.utils import handle_exception_on_proxy

router = APIRouter()


@router.post(
    "/end_user/block",
    tags=["Customer Management"],
    dependencies=[Depends(user_api_key_auth)],
    include_in_schema=False,
)
@router.post(
    "/customer/block",
    tags=["Customer Management"],
    dependencies=[Depends(user_api_key_auth)],
)
async def block_user(data: BlockUsers):
    """
    [BETA] Reject calls with this end-user id

    Parameters:
    - user_ids (List[str], required): The unique `user_id`s for the users to block

        (any /chat/completion call with this user={end-user-id} param, will be rejected.)

        ```
        curl -X POST "http://0.0.0.0:8000/user/block"
        -H "Authorization: Bearer sk-1234"
        -D '{
        "user_ids": [<user_id>, ...]
        }'
        ```
    """
    from litellm.proxy.proxy_server import prisma_client

    try:
        records = []
        if prisma_client is not None:
            for id in data.user_ids:
                record = await prisma_client.db.litellm_endusertable.upsert(
                    where={"user_id": id},  # type: ignore
                    data={
                        "create": {"user_id": id, "blocked": True},  # type: ignore
                        "update": {"blocked": True},
                    },
                )
                records.append(record)
        else:
            raise HTTPException(
                status_code=500,
                detail={"error": "Postgres DB Not connected"},
            )

        return {"blocked_users": records}
    except Exception as e:
        verbose_proxy_logger.error(f"An error occurred - {str(e)}")
        raise HTTPException(status_code=500, detail={"error": str(e)})


@router.post(
    "/end_user/unblock",
    tags=["Customer Management"],
    dependencies=[Depends(user_api_key_auth)],
    include_in_schema=False,
)
@router.post(
    "/customer/unblock",
    tags=["Customer Management"],
    dependencies=[Depends(user_api_key_auth)],
)
async def unblock_user(data: BlockUsers):
    """
    [BETA] Unblock calls with this user id

    Example
    ```
    curl -X POST "http://0.0.0.0:8000/user/unblock"
    -H "Authorization: Bearer sk-1234"
    -D '{
    "user_ids": [<user_id>, ...]
    }'
    ```
    """
    from enterprise.enterprise_hooks.blocked_user_list import (
        _ENTERPRISE_BlockedUserList,
    )

    if (
        not any(isinstance(x, _ENTERPRISE_BlockedUserList) for x in litellm.callbacks)
        or litellm.blocked_user_list is None
    ):
        raise HTTPException(
            status_code=400,
            detail={
                "error": "Blocked user check was never set. This call has no effect."
            },
        )

    if isinstance(litellm.blocked_user_list, list):
        for id in data.user_ids:
            litellm.blocked_user_list.remove(id)
    else:
        raise HTTPException(
            status_code=500,
            detail={
                "error": "`blocked_user_list` must be set as a list. Filepaths can't be updated."
            },
        )

    return {"blocked_users": litellm.blocked_user_list}


@router.post(
    "/end_user/new",
    tags=["Customer Management"],
    include_in_schema=False,
    dependencies=[Depends(user_api_key_auth)],
)
@router.post(
    "/customer/new",
    tags=["Customer Management"],
    dependencies=[Depends(user_api_key_auth)],
)
async def new_end_user(
    data: NewCustomerRequest,
    user_api_key_dict: UserAPIKeyAuth = Depends(user_api_key_auth),
):
    """
    Allow creating a new Customer 


    Parameters:
    - user_id: str - The unique identifier for the user.
    - alias: Optional[str] - A human-friendly alias for the user.
    - blocked: bool - Flag to allow or disallow requests for this end-user. Default is False.
    - max_budget: Optional[float] - The maximum budget allocated to the user. Either 'max_budget' or 'budget_id' should be provided, not both.
    - budget_id: Optional[str] - The identifier for an existing budget allocated to the user. Either 'max_budget' or 'budget_id' should be provided, not both.
    - allowed_model_region: Optional[Union[Literal["eu"], Literal["us"]]] - Require all user requests to use models in this specific region.
    - default_model: Optional[str] - If no equivalent model in the allowed region, default all requests to this model.
    - metadata: Optional[dict] = Metadata for customer, store information for customer. Example metadata = {"data_training_opt_out": True}
    
    
    - Allow specifying allowed regions 
    - Allow specifying default model

    Example curl:
    ```
    curl --location 'http://0.0.0.0:4000/customer/new' \
        --header 'Authorization: Bearer sk-1234' \
        --header 'Content-Type: application/json' \
        --data '{
            "user_id" : "ishaan-jaff-3",
            "allowed_region": "eu",
            "budget_id": "free_tier",
            "default_model": "azure/gpt-3.5-turbo-eu" <- all calls from this user, use this model? 
        }'

        # return end-user object
    ```

    NOTE: This used to be called `/end_user/new`, we will still be maintaining compatibility for /end_user/XXX for these endpoints
    """
    """
    Validation:
        - check if default model exists 
        - create budget object if not already created
    
    - Add user to end user table 

    Return 
    - end-user object
    - currently allowed models 
    """
    from litellm.proxy.proxy_server import (
        litellm_proxy_admin_name,
        llm_router,
        prisma_client,
    )

    if prisma_client is None:
        raise HTTPException(
            status_code=500,
            detail={"error": CommonProxyErrors.db_not_connected_error.value},
        )
    try:

        ## VALIDATION ##
        if data.default_model is not None:
            if llm_router is None:
                raise HTTPException(
                    status_code=422,
                    detail={"error": CommonProxyErrors.no_llm_router.value},
                )
            elif data.default_model not in llm_router.get_model_names():
                raise HTTPException(
                    status_code=422,
                    detail={
                        "error": "Default Model not on proxy. Configure via `/model/new` or config.yaml. Default_model={}, proxy_model_names={}".format(
                            data.default_model, set(llm_router.get_model_names())
                        )
                    },
                )

        new_end_user_obj: Dict = {}

        ## CREATE BUDGET ## if set
        if data.max_budget is not None:
            budget_record = await prisma_client.db.litellm_budgettable.create(
                data={
                    "max_budget": data.max_budget,
                    "created_by": user_api_key_dict.user_id or litellm_proxy_admin_name,  # type: ignore
                    "updated_by": user_api_key_dict.user_id or litellm_proxy_admin_name,
                }
            )

            new_end_user_obj["budget_id"] = budget_record.budget_id
        elif data.budget_id is not None:
            new_end_user_obj["budget_id"] = data.budget_id

        _user_data = data.dict(exclude_none=True)

        for k, v in _user_data.items():
            if k != "max_budget" and k != "budget_id":
                new_end_user_obj[k] = v

        ## WRITE TO DB ##
        end_user_record = await prisma_client.db.litellm_endusertable.create(
            data=new_end_user_obj  # type: ignore
        )

        return end_user_record
    except Exception as e:
        if "Unique constraint failed on the fields: (`user_id`)" in str(e):
            raise ProxyException(
                message=f"Customer already exists, passed user_id={data.user_id}. Please pass a new user_id.",
                type="bad_request",
                code=400,
                param="user_id",
            )

        if isinstance(e, HTTPException):
            raise ProxyException(
                message=getattr(e, "detail", f"Internal Server Error({str(e)})"),
                type="internal_error",
                param=getattr(e, "param", "None"),
                code=getattr(e, "status_code", status.HTTP_500_INTERNAL_SERVER_ERROR),
            )
        elif isinstance(e, ProxyException):
            raise e
        raise ProxyException(
            message="Internal Server Error, " + str(e),
            type="internal_error",
            param=getattr(e, "param", "None"),
            code=status.HTTP_500_INTERNAL_SERVER_ERROR,
        )


@router.get(
    "/customer/info",
    tags=["Customer Management"],
    dependencies=[Depends(user_api_key_auth)],
    response_model=LiteLLM_EndUserTable,
)
@router.get(
    "/end_user/info",
    tags=["Customer Management"],
    include_in_schema=False,
    dependencies=[Depends(user_api_key_auth)],
)
async def end_user_info(
    end_user_id: str = fastapi.Query(
        description="End User ID in the request parameters"
    ),
):
    """
    Get information about an end-user. An `end_user` is a customer (external user) of the proxy.

    Parameters:
    - end_user_id (str, required): The unique identifier for the end-user

    Example curl:
    ```
    curl -X GET 'http://localhost:4000/customer/info?end_user_id=test-litellm-user-4' \
        -H 'Authorization: Bearer sk-1234'
    ```
    """
    from litellm.proxy.proxy_server import prisma_client

    if prisma_client is None:
        raise HTTPException(
            status_code=500,
            detail={"error": CommonProxyErrors.db_not_connected_error.value},
        )

    user_info = await prisma_client.db.litellm_endusertable.find_first(
        where={"user_id": end_user_id}, include={"litellm_budget_table": True}
    )

    if user_info is None:
        raise HTTPException(
            status_code=400,
            detail={"error": "End User Id={} does not exist in db".format(end_user_id)},
        )
    return user_info.model_dump(exclude_none=True)


@router.post(
    "/customer/update",
    tags=["Customer Management"],
    dependencies=[Depends(user_api_key_auth)],
)
@router.post(
    "/end_user/update",
    tags=["Customer Management"],
    include_in_schema=False,
    dependencies=[Depends(user_api_key_auth)],
)
async def update_end_user(
    data: UpdateCustomerRequest,
    user_api_key_dict: UserAPIKeyAuth = Depends(user_api_key_auth),
):
    """
    Example curl 

    Parameters:
    - user_id: str
    - alias: Optional[str] = None  # human-friendly alias
    - blocked: bool = False  # allow/disallow requests for this end-user
    - max_budget: Optional[float] = None
    - budget_id: Optional[str] = None  # give either a budget_id or max_budget
    - allowed_model_region: Optional[AllowedModelRegion] = (
        None  # require all user requests to use models in this specific region
    )
    - default_model: Optional[str] = (
        None  # if no equivalent model in allowed region - default all requests to this model
    )

    Example curl:
    ```
    curl --location 'http://0.0.0.0:4000/customer/update' \
    --header 'Authorization: Bearer sk-1234' \
    --header 'Content-Type: application/json' \
    --data '{
        "user_id": "test-litellm-user-4",
        "budget_id": "paid_tier"
    }'

    See below for all params 
    ```
    """

    from litellm.proxy.proxy_server import prisma_client

    try:
        data_json: dict = data.json()
        # get the row from db
        if prisma_client is None:
            raise Exception("Not connected to DB!")

        # get non default values for key
        non_default_values = {}
        for k, v in data_json.items():
            if v is not None and v not in (
                [],
                {},
                0,
            ):  # models default to [], spend defaults to 0, we should not reset these values
                non_default_values[k] = v

        ## ADD USER, IF NEW ##
        verbose_proxy_logger.debug("/customer/update: Received data = %s", data)
        if data.user_id is not None and len(data.user_id) > 0:
            non_default_values["user_id"] = data.user_id  # type: ignore
            verbose_proxy_logger.debug("In update customer, user_id condition block.")
            response = await prisma_client.db.litellm_endusertable.update(
                where={"user_id": data.user_id}, data=non_default_values  # type: ignore
            )
            if response is None:
                raise ValueError(
                    f"Failed updating customer data. User ID does not exist passed user_id={data.user_id}"
                )
            verbose_proxy_logger.debug(
                f"received response from updating prisma client. response={response}"
            )
            return response
        else:
            raise ValueError(f"user_id is required, passed user_id = {data.user_id}")

        # update based on remaining passed in values
    except Exception as e:
        verbose_proxy_logger.error(
            "litellm.proxy.proxy_server.update_end_user(): Exception occured - {}".format(
                str(e)
            )
        )
        verbose_proxy_logger.debug(traceback.format_exc())
        if isinstance(e, HTTPException):
            raise ProxyException(
                message=getattr(e, "detail", f"Internal Server Error({str(e)})"),
                type="internal_error",
                param=getattr(e, "param", "None"),
                code=getattr(e, "status_code", status.HTTP_500_INTERNAL_SERVER_ERROR),
            )
        elif isinstance(e, ProxyException):
            raise e
        raise ProxyException(
            message="Internal Server Error, " + str(e),
            type="internal_error",
            param=getattr(e, "param", "None"),
            code=status.HTTP_500_INTERNAL_SERVER_ERROR,
        )
    pass


@router.post(
    "/customer/delete",
    tags=["Customer Management"],
    dependencies=[Depends(user_api_key_auth)],
)
@router.post(
    "/end_user/delete",
    tags=["Customer Management"],
    include_in_schema=False,
    dependencies=[Depends(user_api_key_auth)],
)
async def delete_end_user(
    data: DeleteCustomerRequest,
    user_api_key_dict: UserAPIKeyAuth = Depends(user_api_key_auth),
):
    """
    Delete multiple end-users.

    Parameters:
    - user_ids (List[str], required): The unique `user_id`s for the users to delete

    Example curl:
    ```
    curl --location 'http://0.0.0.0:4000/customer/delete' \
        --header 'Authorization: Bearer sk-1234' \
        --header 'Content-Type: application/json' \
        --data '{
            "user_ids" :["ishaan-jaff-5"]
    }'

    See below for all params 
    ```
    """
    from litellm.proxy.proxy_server import prisma_client

    try:
        if prisma_client is None:
            raise Exception("Not connected to DB!")

        verbose_proxy_logger.debug("/customer/delete: Received data = %s", data)
        if (
            data.user_ids is not None
            and isinstance(data.user_ids, list)
            and len(data.user_ids) > 0
        ):
            response = await prisma_client.db.litellm_endusertable.delete_many(
                where={"user_id": {"in": data.user_ids}}
            )
            if response is None:
                raise ValueError(
                    f"Failed deleting customer data. User ID does not exist passed user_id={data.user_ids}"
                )
            if response != len(data.user_ids):
                raise ValueError(
                    f"Failed deleting all customer data. User ID does not exist passed user_id={data.user_ids}. Deleted {response} customers, passed {len(data.user_ids)} customers"
                )
            verbose_proxy_logger.debug(
                f"received response from updating prisma client. response={response}"
            )
            return {
                "deleted_customers": response,
                "message": "Successfully deleted customers with ids: "
                + str(data.user_ids),
            }
        else:
            raise ValueError(f"user_id is required, passed user_id = {data.user_ids}")

        # update based on remaining passed in values
    except Exception as e:
        verbose_proxy_logger.error(
            "litellm.proxy.proxy_server.delete_end_user(): Exception occured - {}".format(
                str(e)
            )
        )
        verbose_proxy_logger.debug(traceback.format_exc())
        if isinstance(e, HTTPException):
            raise ProxyException(
                message=getattr(e, "detail", f"Internal Server Error({str(e)})"),
                type="internal_error",
                param=getattr(e, "param", "None"),
                code=getattr(e, "status_code", status.HTTP_500_INTERNAL_SERVER_ERROR),
            )
        elif isinstance(e, ProxyException):
            raise e
        raise ProxyException(
            message="Internal Server Error, " + str(e),
            type="internal_error",
            param=getattr(e, "param", "None"),
            code=status.HTTP_500_INTERNAL_SERVER_ERROR,
        )
    pass


@router.get(
    "/customer/list",
    tags=["Customer Management"],
    dependencies=[Depends(user_api_key_auth)],
    response_model=List[LiteLLM_EndUserTable],
)
@router.get(
    "/end_user/list",
    tags=["Customer Management"],
    include_in_schema=False,
    dependencies=[Depends(user_api_key_auth)],
)
async def list_end_user(
    http_request: Request,
    user_api_key_dict: UserAPIKeyAuth = Depends(user_api_key_auth),
):
    """
    [Admin-only] List all available customers

    Example curl:
    ```
    curl --location --request GET 'http://0.0.0.0:4000/customer/list' \
        --header 'Authorization: Bearer sk-1234'
    ```

    """
    from litellm.proxy.proxy_server import litellm_proxy_admin_name, prisma_client

    if (
        user_api_key_dict.user_role != LitellmUserRoles.PROXY_ADMIN
        and user_api_key_dict.user_role != LitellmUserRoles.PROXY_ADMIN_VIEW_ONLY
    ):
        raise HTTPException(
            status_code=401,
            detail={
                "error": "Admin-only endpoint. Your user role={}".format(
                    user_api_key_dict.user_role
                )
            },
        )

    if prisma_client is None:
        raise HTTPException(
            status_code=400,
            detail={"error": CommonProxyErrors.db_not_connected_error.value},
        )

    response = await prisma_client.db.litellm_endusertable.find_many(
        include={"litellm_budget_table": True}
    )

    returned_response: List[LiteLLM_EndUserTable] = []
    for item in response:
        returned_response.append(LiteLLM_EndUserTable(**item.model_dump()))
    return returned_response