"""add_dataset_model_name

Revision ID: e8883b0148c9
Revises: 2c8af9671032
Create Date: 2023-08-15 20:54:58.936787

"""
import sqlalchemy as sa
from alembic import op


def _is_pg(conn):
    return conn.dialect.name == "postgresql"

# revision identifiers, used by Alembic.
revision = 'e8883b0148c9'
down_revision = '2c8af9671032'
branch_labels = None
depends_on = None


def upgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    conn = op.get_bind()
    
    if _is_pg(conn):
        # PostgreSQL: Keep original syntax
        with op.batch_alter_table('datasets', schema=None) as batch_op:
            batch_op.add_column(sa.Column('embedding_model', sa.String(length=255), server_default=sa.text("'text-embedding-ada-002'::character varying"), nullable=False))
            batch_op.add_column(sa.Column('embedding_model_provider', sa.String(length=255), server_default=sa.text("'openai'::character varying"), nullable=False))
    else:
        # MySQL: Use compatible syntax
        with op.batch_alter_table('datasets', schema=None) as batch_op:
            batch_op.add_column(sa.Column('embedding_model', sa.String(length=255), server_default=sa.text("'text-embedding-ada-002'"), nullable=False))
            batch_op.add_column(sa.Column('embedding_model_provider', sa.String(length=255), server_default=sa.text("'openai'"), nullable=False))

    # ### end Alembic commands ###


def downgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    with op.batch_alter_table('datasets', schema=None) as batch_op:
        batch_op.drop_column('embedding_model_provider')
        batch_op.drop_column('embedding_model')

    # ### end Alembic commands ###