"""Remove foreign key constraints from logs table.

Revision ID: 0010
Revises: 0009_add_app_settings_table
Create Date: 2025-12-14

"""
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = '0010_remove_logs_foreign_keys'
down_revision = '0009_add_app_settings_table'
branch_labels = None
depends_on = None


def upgrade():
    """Remove FK constraints from logs table by recreating it."""
    # SQLite doesn't support ALTER TABLE DROP CONSTRAINT
    # We need to recreate the table without the FK constraints
    
    # Create new table without FK constraints
    op.create_table(
        'logs_new',
        sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
        sa.Column('level', sa.String(), nullable=False),
        sa.Column('source', sa.String(), nullable=True),
        sa.Column('message', sa.Text(), nullable=False),
        sa.Column('details', sa.JSON(), nullable=True),
        sa.Column('host_id', sa.String(), nullable=True),
        sa.Column('task_id', sa.String(), nullable=True),
        sa.Column('schedule_id', sa.String(), nullable=True),
        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
        sa.PrimaryKeyConstraint('id')
    )
    
    # Copy data from old table
    op.execute('''
        INSERT INTO logs_new (id, level, source, message, details, host_id, task_id, schedule_id, created_at)
        SELECT id, level, source, message, details, host_id, task_id, schedule_id, created_at FROM logs
    ''')
    
    # Drop old table
    op.drop_table('logs')
    
    # Rename new table
    op.rename_table('logs_new', 'logs')
    
    # Recreate indexes
    op.create_index('idx_logs_created_at', 'logs', ['created_at'])
    op.create_index('idx_logs_level', 'logs', ['level'])
    op.create_index('idx_logs_source', 'logs', ['source'])


def downgrade():
    """Restore FK constraints (not recommended)."""
    # This would require recreating with FK constraints
    # For simplicity, we don't implement downgrade
    pass