"""add_telegram_bots_table_and_instance_fk

Revision ID: c3d4e5f6a7b8
Revises: a1b2c3d4e5f6
Create Date: 2026-03-13

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa

# revision identifiers, used by Alembic.
revision: str = 'c3d4e5f6a7b8'
down_revision: Union[str, None] = 'a1b2c3d4e5f6'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        'telegram_bots',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('user_id', sa.Integer(), nullable=False),
        sa.Column('name', sa.String(100), nullable=False),
        sa.Column('bot_token', sa.Text(), nullable=False),
        sa.Column('chat_id', sa.String(50), nullable=False),
        sa.Column('active_instance_id', sa.Integer(), nullable=True),
        sa.Column('created_at', sa.DateTime(), nullable=False, server_default=sa.text('now()')),
        sa.Column('updated_at', sa.DateTime(), nullable=False, server_default=sa.text('now()')),
        sa.ForeignKeyConstraint(['user_id'], ['users.id']),
        sa.PrimaryKeyConstraint('id')
    )
    op.create_index(op.f('ix_telegram_bots_user_id'), 'telegram_bots', ['user_id'], unique=False)

    op.add_column('trading_instances', sa.Column('telegram_bot_id', sa.Integer(), nullable=True))
    op.create_foreign_key(
        'fk_trading_instances_telegram_bot_id',
        'trading_instances', 'telegram_bots',
        ['telegram_bot_id'], ['id']
    )


def downgrade() -> None:
    op.drop_constraint('fk_trading_instances_telegram_bot_id', 'trading_instances', type_='foreignkey')
    op.drop_column('trading_instances', 'telegram_bot_id')
    op.drop_index(op.f('ix_telegram_bots_user_id'), table_name='telegram_bots')
    op.drop_table('telegram_bots')