from __future__ import annotations
import datetime, hashlib, logging, os, pytz, redis, secrets

from typing import Dict, List, Optional, Set, Union
from pydantic import BaseModel, EmailStr, Field, Json, PrivateAttr, ValidationError, validator

from app.db_sql import redis_lookup_id_random
from app.lib_general import log, logging

from .common_field_schema import base_fields, default_num_bytes


class Hosted_File_Link_Base(BaseModel):
    log.setLevel(logging.WARNING) # DEBUG, INFO, WARNING, ERROR, EXCEPTION, CRITICAL
    log.debug(locals())

    id_random: Optional[str] = Field(
        **base_fields['hosted_file_link_id_random'],
        alias = 'hosted_file_link_id_random',
        default_factory = lambda:secrets.token_urlsafe(default_num_bytes),
    )
    id: Optional[int] = Field(
        #alias = 'hosted_file_link_id'
    )
    account_id_random: Optional[str]
    account_id: Optional[int]

    hosted_file_id_random: Optional[str]
    hosted_file_id: Optional[int]

    link_to_type: Optional[str] # Should this be renamed to "link_to_obj_type" for clarity?
    link_to_id_random: Optional[str] # Should this be renamed to "link_to_obj_id_random" for clarity?
    link_to_id: Optional[int] # Should this be renamed to "link_to_obj_id" for clarity?

    # notes: Optional[str]
    created_on: Optional[datetime.datetime] = None
    updated_on: Optional[datetime.datetime] = None

    # Including other related objects
    link_to: Optional[dict] # Should this be renamed to "link_to_obj" or leave off the "_obj"?

    _processed_at: datetime.datetime = PrivateAttr(default_factory=datetime.datetime.now)

    #@validator('hosted_file_link_id_random', always=True)
    def hosted_file_link_id_random_copy(cls, v, values, **kwargs):
        log.setLevel(logging.WARNING)
        log.debug(locals())

        if values['id_random']:
            return values['id_random']
        return None

    @validator('id', always=True)
    def hosted_file_link_id_lookup(cls, v, values, **kwargs):
        log.setLevel(logging.WARNING)
        log.debug(locals())

        if values['id_random']:
            log.debug(values['id_random'])
            return redis_lookup_id_random(record_id_random=values['id_random'], table_name='hosted_file_link')
        return None

    @validator('account_id', always=True)
    def account_id_lookup(cls, v, values, **kwargs):
        log.setLevel(logging.WARNING)
        log.debug(locals())

        if values['account_id_random']:
            return redis_lookup_id_random(record_id_random=values['account_id_random'], table_name='account')
        return None

    @validator('link_to_id', always=True)
    def link_to_id_lookup(cls, v, values, **kwargs):
        log.setLevel(logging.WARNING)
        log.debug(locals())

        if values['link_to_id_random'] and values['link_to_type']:
            return redis_lookup_id_random(record_id_random=values['link_to_id_random'], table_name=values['link_to_type'])
        return None

    class Config:
        underscore_attrs_are_private = True
        fields = base_fields

Hosted_File_Link_Base.update_forward_refs()