"""
Validation function handlers
"""

from typing import Dict, Any
from fastapi import Request

from ApiLayers.AllConfigs.Redis.configs import (
    RedisValidationKeysAction,
    RedisCategoryKeys,
)
from Services.Redis.Actions.actions import RedisActions
from Events.base_request_model import BaseRouteModel

from config import ValidationsConfig


class ValidateBase:

    redis_key: str = f"{RedisCategoryKeys.METHOD_FUNCTION_CODES}:*:"

    def __init__(self, url: str, reachable_codes: list):
        self.url = url
        self.reachable_codes = reachable_codes

    @property
    def function_codes(self):
        redis_function_codes = RedisActions.get_json(
            list_keys=[f"{self.redis_key}{self.url}"]
        )
        if redis_function_codes.status:
            return redis_function_codes.first
        raise ValueError("Function code not found")

    @property
    def intersection(self):
        intersection = list(
            set(self.function_codes).intersection(set(self.reachable_codes))
        )
        if not len(intersection) == 1:
            raise ValueError(
                "Users reachable function codes does not match or match more than one."
            )
        return intersection[0]


class RedisHeaderRetrieve(ValidateBase):

    redis_key: str = RedisValidationKeysAction.dynamic_header_request_key

    @property
    def header(self):
        """
        Headers: Headers which is merged with response model && language models of event
        """
        redis_header = RedisActions.get_json(
            list_keys=[f"{self.redis_key}:{self.intersection}"]
        )
        if redis_header.status:
            return redis_header.first
        raise ValueError("Header not found")


class RedisValidationRetrieve(ValidateBase):

    redis_key: str = RedisValidationKeysAction.dynamic_validation_key

    @property
    def validation(self):
        """
        Validation: Validation of event which is merged with response model && language models of event
        """
        redis_validation = RedisActions.get_json(
            list_keys=[f"{self.redis_key}:{self.intersection}"]
        )
        if redis_validation.status:
            return redis_validation.first
        raise ValueError("Header not found")


class ValidationsBoth(RedisHeaderRetrieve, RedisValidationRetrieve):

    @property
    def both(self) -> Dict[str, Any]:
        """
        Headers: Headers which is merged with response model && language models of event
        Validation: Validation of event which is merged with response model && language models of event
        """
        return {"headers": self.header, "validation": self.validation}


class RetrieveValidation(BaseRouteModel):

    @classmethod
    def retrieve_validation(cls, data: Any):
        """
        Retrieve validation by event function code
        """
        if (
            getattr(data, "asked_field", "")
            not in ValidationsConfig.SUPPORTED_VALIDATIONS
        ):
            raise ValueError(
                f"Invalid asked field please retry with valid fields {ValidationsConfig.SUPPORTED_VALIDATIONS}"
            )

        reachable_codes = []
        if cls.context_retriever.token.is_employee:
            reachable_codes = (
                cls.context_retriever.token.selected_company.reachable_event_codes
            )
        elif cls.context_retriever.token.is_occupant:
            reachable_codes = (
                cls.context_retriever.token.selected_occupant.reachable_event_codes
            )

        validate_dict = dict(url=data.url, reachable_code=reachable_codes)
        if data.asked_field == "all":
            return ValidationsBoth(**validate_dict).both
        elif data.asked_field == "headers":
            return RedisHeaderRetrieve(**validate_dict).header
        elif data.asked_field == "validation":
            return RedisValidationRetrieve(**validate_dict).validation