"""Add data_source columns for provider tracking

Revision ID: a1b2c3d4e5f6
Revises: 6c3fce1dd49a
Create Date: 2026-01-01 14:30:00.000000

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = 'a1b2c3d4e5f6'
down_revision: Union[str, None] = '6c3fce1dd49a'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # Add data_source column to daily_health_metrics
    op.add_column(
        'daily_health_metrics',
        sa.Column('data_source', sa.String(50), nullable=True, server_default='google_fit')
    )
    
    # Add data_source column to workout_sessions
    op.add_column(
        'workout_sessions',
        sa.Column('data_source', sa.String(50), nullable=True, server_default='google_fit')
    )
    
    # Update existing rows to have default value
    op.execute("UPDATE daily_health_metrics SET data_source = 'google_fit' WHERE data_source IS NULL")
    op.execute("UPDATE workout_sessions SET data_source = 'google_fit' WHERE data_source IS NULL")


def downgrade() -> None:
    op.drop_column('daily_health_metrics', 'data_source')
    op.drop_column('workout_sessions', 'data_source')