"""

    AUTHOR:

        Khushal P Soonderji

    DATE:

        Tuesday, 3rd Dec., 2024

    OBJECTIVE:

        To enlist multiple e-mails for a given user at a time.

    REFERENCES:

        N/A

    DOWNLOADS:

        N/A

    NOTES:

        N/A

"""


#   *****************************************************************************************************************
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# ***                                                   IMPORT                                                      ***
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# To make sibling directories accessible for imports:
import sys
sys.path.append(".")
sys.path.append("..")

# For using Quart:
from quart import Blueprint, current_app, g, request

# My utils:
from utils_v2.string import json
from utils_v2.database.async_mongo_v2 import AsyncMongo
from utils_v2.api.codes import StatusCodes, HttpCodes
from utils_v2.api.response import ResponseModel
from utils_v2.api.async_quart import (
    set_api_version,
    read_input,
    get_session_info,
    log_request_to_mongo,
    log_chain_to_mongo,
    should_not_be_under_maintenance,
    only_whitelisted_ips,
    limit_rate,
    validate_input,
    handle_cancelled_request
)

# GMail-related utils:
from utils_v2.goog.gmail.gmail_client import SCOPES_GMAIL_MAIL_MANAGEMENT
from utils_v2.goog.models.data.auth_tokens import GoogleAuthTokens

# Common:
from shared import constants

# Data Models:
from models.data.mail.sync import MailSyncRequestHeaders, MailSyncRequestData
from models.data.mail.sync import MailSyncOneResult, MailSyncManyResults

# To work with datatypes:
from typing import Literal

# For asynchronous activities:
import asyncio

# To work with LLMs:
from langchain_openai import ChatOpenAI

# To work with date and time:
import datetime


#   *****************************************************************************************************************
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# ***                                           MACROS / ONE-TIME INIT                                              ***
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#   *****************************************************************************************************************


# Related to Quart:
mail_sync_bp = Blueprint("mail_sync", __name__)


#   *****************************************************************************************************************
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# --- Nothing Yet


#   *****************************************************************************************************************
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# ***                                                  FUNCTIONS                                                    ***
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@mail_sync_bp.record_once
def init(blueprint_setup_state):

    # This gets called when the blueprint is registered.
    # Consider this to be a one-time setup for the whole blueprint:
    pass


# ---------------------------------------------------------------------------------------------------------------------


async def sync_mails(
        mongo_conn: AsyncMongo,
        llm: ChatOpenAI,
        inbound_headers: dict,
        inbound_data: MailSyncRequestData
) -> MailSyncManyResults:

    """
    A very simple function, but kept separate so that we get the option to switch between running it in the foreground
    and running it in the background.
    :param mongo_conn: The instance of the database connector to use to sync the mails.
    :param llm: The instance of the LLM to use to summarize the mails.
    :param inbound_headers: The headers that came in with the request.
    :param inbound_data: The data that came in with the request.
    :return: The results of the mail-sync'ing attempt.
    """

    # Try to sync the mails:
    return await current_app.mail_sync_model.sync(
        session_token = inbound_headers["X-Session-Token"],
        mongo_conn = mongo_conn,
        account_identifier = inbound_data.accountId,
        llm = llm,
        force_sync = inbound_data.forceSync,
        start_date = inbound_data.startDate,
        end_date = inbound_data.endDate,
        max_count = inbound_data.maxCount
    )


# ---------------------------------------------------------------------------------------------------------------------


@mail_sync_bp.route("/sync", methods = ["POST"])
@mail_sync_bp.route("/sync/<mode>", methods = ["POST"])
@set_api_version(api_version = "1.0.0")
@read_input(sanitize_headers = False, sanitize_data = False)
@get_session_info(key = "X-Session-Token", session_coro = "get_session")
@log_request_to_mongo(
    attr_name = "logs_mongo",
    project = constants.PROJECT_NAME,
    log_type = constants.MODULE_NAME,
    operation = "mailOAuthUrlReqApi",
    log_input = True,
    log_output = True,
    sensitive_keys = ["sessionToken", "X-Session-Token"]
)
@log_chain_to_mongo(attr_name = "logs_mongo")
@should_not_be_under_maintenance(attr_name = "is_under_maintenance")
@validate_input(
    header_validator = lambda x: MailSyncRequestHeaders(**x).model_dump(),
    data_validator = lambda x: MailSyncRequestData(**x)
)
@handle_cancelled_request()
async def sync_mail(
        mode: Literal["background", "bg"] = None,
        inbound_headers: dict | MailSyncRequestHeaders = None,
        inbound_data: dict | MailSyncRequestData = None,
        inbound_files: dict = None,
        **kwargs
):

    """
    Use this when the user wants to pull old mails from some mail client (like GMail) and save it to the database for
    ready access on the UI.
    :param mode: Set it to one of the specified options to make the sync'ing process go to the background.
    :param inbound_headers: auto-extracted by the decorators.
    :param inbound_data: auto-extracted by the decorators.
    :param inbound_files: auto-extracted by the decorators.
    :param kwargs: Any number of extra inputs supplied by the decorators.
    :return: A standard response structure.
    """

    # If the session token is invalid/expired:
    if kwargs.get("session_info") is None:
        return ResponseModel(
            status_code = StatusCodes.FAILED,
            http_code = HttpCodes.UNAUTHORIZED
        )

    # Make the variables available in the scope of the current request:
    g.inbound_headers = inbound_headers
    g.inbound_data = inbound_data

    # If we've been asked to sync the mails in the background:
    if mode in ["background", "bg"]:
        current_app.add_background_task(
            sync_mails,
            mongo_conn = current_app.data_mongo,
            llm = current_app.llm,
            inbound_headers = inbound_headers,
            inbound_data = inbound_data
        )
        return ResponseModel(
            status_code = StatusCodes.OK,
            http_code = HttpCodes.ACCEPTED,
            message = "your mails are being sync'd in the background"
        )

    # Otherwise we process it right here:
    sync_results = await sync_mails(
        mongo_conn = current_app.data_mongo,
        llm = current_app.llm,
        inbound_headers = inbound_headers,
        inbound_data = inbound_data
    )

    # Response:
    return ResponseModel(
        status_code = StatusCodes.FAILED if sync_results.failureCount > 0 else StatusCodes.OK,
        http_code = HttpCodes.INTERNAL_SERVER_ERROR if sync_results.failureCount > 0 else HttpCodes.SUCCESS,
        message = sync_results.message,
        data = {
            "totalCount": sync_results.totalCount,
            "successCount": sync_results.successCount,
            "failureCount": sync_results.failureCount
        }
    )


#   *****************************************************************************************************************
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# ***                                               MAIN PROGRAM                                                    ***
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#   *****************************************************************************************************************


if __name__ == "__main__":

    pass