"""

    AUTHOR:

        Khushal P Soonderji

    DATE:

        Monday, 2nd Dec., 2024.

    OBJECTIVE:

        To provide the structure for the request that will come in to sync the mails of a particular user.

    REFERENCES:

        N/A

    DOWNLOADS:

        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 making data behaviour_models:
from pydantic import BaseModel, Field, field_validator, PastDatetime, AwareDatetime
from typing import Optional, Literal

# My utils:
from utils_v2.string import regex
from utils_v2.date_time import date_time

# Data models:
from models.core.message import CoreMessageModel

# To work with date and time:
import datetime


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


# RegEx Patterns:
REGEX_SESSION_TOKEN = r"^[a-f0-9]{8}-[a-f0-9]{4}-[1-5][a-f0-9]{3}-[89ab][a-f0-9]{3}-[a-f0-9]{12}$"


#   *****************************************************************************************************************
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# ***                                                VARIABLES                                                      ***
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#   *****************************************************************************************************************


# --- Nothing Yet


#   *****************************************************************************************************************
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# ***                                                  FUNCTIONS                                                    ***
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class MailSyncRequestHeaders(BaseModel):

    sessionToken: str = Field(
        description = "the session token of the user who is requesting the service",
        pattern = REGEX_SESSION_TOKEN,
        frozen = True,
        alias = "X-Session-Token"
    )

    # ┏┓    ┏•
    # ┃ ┏┓┏┓╋┓┏┓
    # ┗┛┗┛┛┗┛┗┗┫
    #          ┛

    class Config:
        extra = "allow"

    def model_dump(self, *args, **kwargs):
        return super().model_dump(*args, by_alias = True, **kwargs)


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


class MailSyncRequestData(BaseModel):

    tokenKey: str = Field(
        description = "the account identifier (Mongo ObjectId) granted by 'MailOAuthModel.get_account_identifier'",
        frozen = True
    )

    maxCount: int = Field(
        description = "the max. no. of e-mails to sync at a given time",
        default = 100,
        ge = 1,
        le = 100,
        frozen = True
    )

    startDate: AwareDatetime = Field(
        description = "the starting date from which the user wants to sync their mail",
        default_factory = lambda: date_time.get_current_utc_date_time() - datetime.timedelta(days = 1),
        frozen = True
    )

    endDate: AwareDatetime = Field(
        description = "the ending date till which the user wants to sync their mail",
        default_factory = lambda: date_time.get_current_utc_date_time() - datetime.timedelta(seconds = 1),
        frozen = True
    )

    forceSync: bool = Field(
        description = "use this to forcefully re-sync mails when you need to overwrite existing data in mongodb",
        default = False
    )

    # ┏┓    ┏•
    # ┃ ┏┓┏┓╋┓┏┓
    # ┗┛┗┛┛┗┛┗┗┫
    #          ┛

    class Config:
        extra = "forbid"

    # ┓┏  ┓• ┓   •
    # ┃┃┏┓┃┓┏┫┏┓╋┓┏┓┏┓
    # ┗┛┗┻┗┗┗┻┗┻┗┗┗┛┛┗

    @field_validator("startDate", "endDate", mode = "before")
    def to_datetime(cls, value):
        if not isinstance(value, datetime.datetime):
            value = date_time.parse_date_time(
                input_value = value,
                timezone = date_time.TIMEZONE_UTC
            )
        return value


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


class MailSyncOneResult(BaseModel):

    success: bool = Field(
        description = "whether, or not, the mail was successfully sync'd",
        default = False
    )

    message: str | None = Field(
        description = "a brief message to summarize the result of the process",
        default = None
    )

    mailMessage: CoreMessageModel | None = Field(
        description = "the actual data of the mail; can be null in a successful process if the mail is already sync'd",
        default = None
    )

    # ┏┓    ┏•
    # ┃ ┏┓┏┓╋┓┏┓
    # ┗┛┗┛┛┗┛┗┗┫
    #          ┛

    class Config:
        extra = "forbid"


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


class MailSyncManyResults(BaseModel):

    totalCount: int = Field(
        description = "the total no. of mails that were to be sync'd",
        default = 0
    )

    successCount: int = Field(
        description = "the no. of mails that were successfully sync'd",
        default = 0
    )

    failureCount: int = Field(
        description = "the no. of mails that were successfully sync'd",
        default = 0
    )

    message: str = Field(
        description = "a brief message to summarize the results of the process",
        default = None
    )

    # ┏┓    ┏•
    # ┃ ┏┓┏┓╋┓┏┓
    # ┗┛┗┛┛┗┛┗┗┫
    #          ┛

    class Config:
        extra = "forbid"


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


if __name__ == "__main__":

    pass
