import datetime, pytz

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

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

from app.models.common_field_schema import base_fields, default_num_bytes


# ### BEGIN ### API Page Models ### Page_Base() ###
class Page_Base(BaseModel):
    log.setLevel(logging.WARNING) # DEBUG, INFO, WARNING, ERROR, EXCEPTION, CRITICAL
    log.debug(locals())

    # --- Standardized Vision IDs (Strings) ---
    id: Optional[str] = Field(None, **base_fields['page_id_random'])
    page_id: Optional[str] = Field(None, **base_fields['page_id_random'])
    account_id: Optional[str] = Field(None, **base_fields['account_id_random'])
    site_id: Optional[str] = Field(None, **base_fields['site_id_random'])

    # page_id_random: Optional[str] = Field(
    #     **base_fields['page_id_random'],
    #     alias = 'page_id_random',
    # )
    # id: Optional[int] = Field(
    #     alias = 'page_id'
    # )

    code: Optional[str]
    name: Optional[str]
    title: Optional[str]
    description: Optional[str]
    summary: Optional[str]
    outline: Optional[str]

    head_html: Optional[str]
    body_html: Optional[str]
    footer_html: Optional[str]

    content_html: Optional[str]
    content_json: Optional[Union[Json, None]]

    # keywords: Optional[str]
    tags: Optional[str]

    start_datetime: Optional[datetime.datetime]
    end_datetime: Optional[datetime.datetime]
    timezone: Optional[str] # = 'UTC' # Default to UTC

    cfg_json: Optional[Union[Json, None]]
    data_json: Optional[Union[Json, None]] # Used to store additional data for the page
    meta_json: Optional[Union[Json, None]] # Used to store additional data for about the page

    enable: Optional[bool]
    hide: Optional[bool]
    priority: Optional[bool]
    sort: Optional[int]
    group: Optional[str]

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

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

    @root_validator(pre=True)
    def map_v3_ids(cls, values):
        """
        Vision Transformer:
        Map DB keys to clean API keys and strip internal integers.
        """
        # 1. Map Random Strings to Clean Names
        if rid := values.get('id_random') or values.get('page_id_random'):
            values['id'] = rid
            values['page_id'] = rid
            
        if a_rid := values.get('account_id_random'):
            values['account_id'] = a_rid
        if s_rid := values.get('site_id_random'):
            values['site_id'] = s_rid
            
        # 2. Prevent "Collision Population"
        for k in ['id', 'account_id', 'site_id']:
            if k in values and not isinstance(values[k], str):
                del values[k]
                
        return values

    class Config:
        underscore_attrs_are_private = True
        allow_population_by_field_name = False
        fields = base_fields
# ### END ### API Page Models ### Page_Base() ###