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, secure_hash_string

from app.models.common_field_schema import base_fields, default_num_bytes
from app.models.person_models import Person_Base
from app.models.user_models import User_Base


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

    # --- Standardized Vision IDs (Strings for API, Integers for DB) ---
    id: Optional[Union[int, str]] = Field(None, **base_fields['post_id_random'])
    post_id: Optional[Union[int, str]] = Field(None, **base_fields['post_id_random'])
    account_id: Optional[Union[int, str]] = Field(None, **base_fields['account_id_random'])
    person_id: Optional[Union[int, str]] = Field(None, **base_fields['person_id_random'])
    user_id: Optional[Union[int, str]] = Field(None, **base_fields['user_id_random'])

    external_person_id: Optional[str] # Person ID generated by external system (should be stable and not change)

    # user_id_random: Optional[str]
    # user_id: Optional[int]

    # type_id_random: Optional[str]
    # type_id: Optional[int]

    # topic_id_random: Optional[str]
    topic_id: Optional[int]

    type: Optional[str]

    # topic: Optional[str] # Not currently used

    title: Optional[str]
    content: Optional[str]

    anonymous: Optional[bool]
    full_name: Optional[str]
    email: Optional[str]
    notify: Optional[bool]
    # timezone: Optional[str]

    post_comment_count: Optional[int] # post comment count using view

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

    enable_comments: Optional[bool]
    unauthenticated_access: Optional[bool]

    status: Optional[int]
    review: Optional[bool]
    approve: Optional[bool]
    ready_on: Optional[datetime.datetime] = None
    ready: Optional[bool]
    archive_on: Optional[datetime.datetime] = None
    archive: Optional[bool]

    linked_li_json: Optional[Union[Json, None]]
    cfg_json: Optional[Union[Json, None]]

    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

    # Including convenience data
    topic_name: Optional[str] # From lookup list

    # Including other related objects
    post_comment_list: Optional[list] = Field(
        alias = 'comment_list'
    ) # Post_Comment_Base()
    person: Optional[Person_Base]
    user: Optional[User_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 during READ operations.
        During CREATE (POST) operations, we ensure resolved integers are preserved.
        """
        # 1. Map Random Strings to Clean Names
        rid = values.get('id_random') or values.get('post_id_random')
        if rid and isinstance(rid, str):
            values['id'] = rid
            values['post_id'] = rid

        if a_rid := values.get('account_id_random'): values['account_id'] = a_rid
        if p_rid := values.get('person_id_random'): values['person_id'] = p_rid
        if u_rid := values.get('user_id_random'): values['user_id'] = u_rid

        # 2. Prevent "Collision Population" or leakage of integers during API responses
        for k in ['id', 'post_id', 'account_id', 'person_id', 'user_id']:
            val = values.get(k)
            if val is not None and not isinstance(val, str):
                if values.get(f'{k}_random') or (k=='id' and values.get('id_random')):
                    del values[k]

        return values

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