from typing import TYPE_CHECKING
from uuid import UUID

from tortoise import fields

from .base import TimestampedModel

if TYPE_CHECKING:
    from .target_channel import TargetChannel
    from .workspace import Workspace


class ExternalChannel(TimestampedModel):
    id = fields.UUIDField(pk=True)
    telegram_id = fields.BigIntField(index=True)
    title = fields.CharField(max_length=255)
    username = fields.CharField(max_length=255, null=True, index=True)
    description = fields.TextField(null=True)
    subscribers_count = fields.IntField(null=True)

    workspace: fields.ForeignKeyRelation['Workspace'] = fields.ForeignKeyField(
        'models.Workspace', related_name='external_channels', on_delete=fields.CASCADE, index=True
    )

    if TYPE_CHECKING:
        target_channels: fields.ManyToManyRelation['TargetChannel']
        workspace_id: UUID

    class Meta:
        table = 'external_channel'