"""Add ai_models table

Revision ID: 20251208_ai_models
Revises: 20251208_tasks_count
Create Date: 2024-12-08

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import postgresql


# revision identifiers, used by Alembic.
revision: str = '20251208_ai_models'
down_revision: Union[str, None] = '20251208_tasks_count'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # Создаём таблицу ai_models (enum aiprovider создаётся автоматически SQLAlchemy)
    op.create_table(
        'ai_models',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('provider', postgresql.ENUM('openai', 'google', name='aiprovider', create_type=False), nullable=False),
        sa.Column('model_name', sa.String(length=100), nullable=False),
        sa.Column('display_name', sa.String(length=100), nullable=False),
        sa.Column('is_active', sa.Boolean(), nullable=True, server_default='false'),
        sa.Column('created_at', sa.DateTime(), nullable=True),
        sa.PrimaryKeyConstraint('id')
    )

    # Добавляем дефолтные модели
    op.execute("""
        INSERT INTO ai_models (provider, model_name, display_name, is_active, created_at)
        VALUES
            ('openai', 'gpt-4o-mini', 'GPT-4o Mini', true, NOW()),
            ('openai', 'gpt-5-nano', 'GPT-5 Nano', false, NOW()),
            ('google', 'gemini-2.5-flash-lite', 'Gemini 2.5 Flash Lite', false, NOW())
    """)


def downgrade() -> None:
    op.drop_table('ai_models')