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_abstract_models import Event_Abstract_Base # This creates an import loop
from app.models.event_person_models import Event_Person_Base
from app.models.event_presenter_models import Event_Presenter_Base
from app.models.person_models import Person_Base


# ### BEGIN ### API Event Presentation Models ### Event_Presentation_Base() ###
class Event_Presentation_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_presentation_id_random'])
    event_presentation_id: Optional[str] = Field(None, **base_fields['event_presentation_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_abstract_id: Optional[str] = Field(None, **base_fields['event_abstract_id_random'])
    event_location_id: Optional[str] = Field(None, **base_fields['event_location_id_random'])
    event_session_id: Optional[str] = Field(None, **base_fields['event_session_id_random'])
    event_track_id: Optional[str] = Field(None, **base_fields['event_track_id_random'])

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

    external_id: Optional[str] = Field(
        # alias = 'event_presentation_external_id'
    )

    code: Optional[str]

    poc_event_person: Optional[Event_Person_Base]
    poc_person: Optional[Person_Base]

    for_type: Optional[str]
    for_id: Optional[int]

    abstract_code: Optional[str]

    # FUTURE: This event_presentation.type_code should override, the type_code of the event_session.type_code.
    type_code: Optional[str] # None, poster (image, video), assume presentation (PPT, Key, PDF, etc)

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

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

    passcode: Optional[str]

    file_count: Optional[int]

    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
    # This is only for convenience. Probably going to keep unless it causes a problem.
    event_name: Optional[str]
    event_start_datetime: Optional[datetime.datetime]
    event_end_datetime: Optional[datetime.datetime]
    event_location_name: Optional[str]
    event_session_type_code: Optional[str]
    event_session_name: Optional[str]
    event_session_start_datetime: Optional[datetime.datetime]
    event_session_end_datetime: Optional[datetime.datetime]
    event_track_name: Optional[str]

    # Including other related objects
    #event: Optional[Event_Base]
    #event_abstract: Optional[Event_Abstract_Base] # This creates an import loop
    event_abstract_list: Optional[list] # Optional[Event_Abstract_Base] Is more than one abstract allowed per presenter?
    #event_device_list: Optional[list] # Optional[Event_Device_Base]
    event_file_list: Optional[list] # Optional[Event_File_Base]
    #event_location: Optional[Event_Location_Base]
    event_presenter_list: Optional[list[Event_Presenter_Base]] # Optional[Event_Presenter_Base]
    # event_session: Optional[Event_Session_Base]
    event_session: Optional[dict]
    #event_track: 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_presentation_id_random'):
            values['id'] = rid
            values['event_presentation_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 ea_rid := values.get('event_abstract_id_random'):
            values['event_abstract_id'] = ea_rid
        if el_rid := values.get('event_location_id_random'):
            values['event_location_id'] = el_rid
        if es_rid := values.get('event_session_id_random'):
            values['event_session_id'] = es_rid
        if et_rid := values.get('event_track_id_random'):
            values['event_track_id'] = et_rid
            
        # 2. Prevent "Collision Population"
        for k in ['id', 'event_presentation_id', 'account_id', 'event_id', 'event_abstract_id', 'event_location_id', 'event_session_id', 'event_track_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', 'file_count',
        'event_name', 'event_start_datetime', 'event_end_datetime', 'event_location_name',
        'event_session_type_code', 'event_session_name', 'event_session_start_datetime',
        'event_session_end_datetime', 'event_track_name',
        'poc_event_person', 'poc_person', 'event_abstract_list', 'event_file_list',
        'event_presenter_list', 'event_session'
    ]

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