import datetime, pytz

from typing import Dict, List, Optional, Set, Union, ClassVar
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
# from app.models.event_models import Event_Base


# ### BEGIN ### API Event Track Models ### Event_Track_Base() ###
class Event_Track_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['event_track_id_random'])
    event_track_id: Optional[str] = Field(None, **base_fields['event_track_id_random'])

    account_id: Optional[str] = Field(None, **base_fields['account_id_random'])
    event_id: Optional[str] = Field(None, **base_fields['event_id_random'])
    event_location_id: Optional[str] = Field(None, **base_fields['event_location_id_random'])

    # --- Standardized Legacy / Internal IDs (Excluded) ---
    id_random: Optional[str] = Field(None, alias='event_track_id_random', exclude=True)
    account_id_random: Optional[str] = Field(None, exclude=True)
    event_id_random: Optional[str] = Field(None, exclude=True)
    event_location_id_random: Optional[str] = Field(None, exclude=True)

    lu_track_type_id: Optional[int]
    track_type_code: Optional[str]
    track_type: Optional[str]

    name: Optional[str]
    description: Optional[str]

    start_datetime: Optional[datetime.datetime]
    end_datetime: Optional[datetime.datetime]

    enable: Optional[bool]
    enable_from: Optional[datetime.datetime] = None
    enable_to: Optional[datetime.datetime] = None

    hide: Optional[bool]
    public: Optional[bool]
    public_hide: Optional[bool]
    hide_event_launcher: 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

    # Including convenience data
    event_name: Optional[str]
    event_start_datetime: Optional[datetime.datetime]
    event_end_datetime: Optional[datetime.datetime]

    # Including other related objects
    #event: Optional[Event_Base]
    event_abstract_list: Optional[list] # Optional[Event_Abstract_Base]
    event_device_list: Optional[list] # Optional[Event_Device_Base]
    event_file_list: Optional[list] # Optional[Event_File_Base]
    event_presentation_list: Optional[list] # Optional[Event_Presentation_Base]
    event_presenter_list: Optional[list] # Optional[Event_Presenter_Base]
    event_session_list: Optional[list] # Optional[Event_Session_Base]
    event_track_list: Optional[list] # Optional[Event_Track_Base]

    _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('event_track_id_random'):
            values['id'] = rid
            values['event_track_id'] = rid
            
        if a_rid := values.get('account_id_random'):
            values['account_id'] = a_rid
        if e_rid := values.get('event_id_random'):
            values['event_id'] = e_rid
        if el_rid := values.get('event_location_id_random'):
            values['event_location_id'] = el_rid
            
        # 2. Prevent "Collision Population"
        for k in ['id', 'event_track_id', 'account_id', 'event_id', 'event_location_id']:
            if k in values and not isinstance(values[k], str) and values[k] is not None:
                del values[k]
                
        return values

    # Fields that are part of the model (for reading) but should not be saved to the DB table
    fields_to_exclude_from_db: ClassVar[list] = [
        'account_id', 'track_type',
        'event_name', 'event_start_datetime', 'event_end_datetime',
        'event_abstract_list', 'event_device_list', 'event_file_list',
        'event_presentation_list', 'event_presenter_list', 'event_session_list', 'event_track_list'
    ]

    class Config:
        underscore_attrs_are_private = True
        allow_population_by_field_name = False
        fields = base_fields
# ### END ### API Event Track Models ### Event_Track_Base() ###