import enum
from typing import TYPE_CHECKING
from uuid import UUID

from tortoise import fields

from .base import TimestampedModel

if TYPE_CHECKING:
    from .external_channel import ExternalChannel
    from .workspace import Workspace


class TargetChannelStatus(str, enum.Enum):
    ACTIVE = 'active'
    INACTIVE = 'inactive'
    ARCHIVED = 'archived'


class TargetChannel(TimestampedModel):
    id = fields.UUIDField(pk=True)
    telegram_id = fields.BigIntField(unique=True, index=True)
    title = fields.CharField(max_length=255)
    username = fields.CharField(max_length=255, null=True, index=True)
    status = fields.CharEnumField(TargetChannelStatus, default=TargetChannelStatus.ACTIVE)

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

    external_channels: fields.ManyToManyRelation['ExternalChannel'] = fields.ManyToManyField(
        'models.ExternalChannel',
        related_name='target_channels',
        through='target_external_channel',
        forward_key='external_channel_id',
        backward_key='target_channel_id',
    )

    if TYPE_CHECKING:
        workspace_id: UUID

    class Meta:
        table = 'target_channel'