from __future__ import annotations

from alembic import op
import sqlalchemy as sa
from sqlalchemy import inspect


# revision identifiers, used by Alembic.
revision = '20250927_000015_add_lines'
down_revision = '20250927_000014_add_documents'
branch_labels = None
depends_on = None


def upgrade() -> None:
	bind = op.get_bind()
	inspector = inspect(bind)
	tables = set(inspector.get_table_names())
	
	# Create document_lines table if it doesn't exist
	if 'document_lines' not in tables:
		op.create_table(
			'document_lines',
			sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
			sa.Column('document_id', sa.Integer(), nullable=False),
			sa.Column('debit', sa.Numeric(18, 2), nullable=False, server_default=sa.text('0')), 
			sa.Column('credit', sa.Numeric(18, 2), nullable=False, server_default=sa.text('0')),
			sa.Column('description', sa.Text(), nullable=True),
			sa.Column('extra_info', sa.JSON(), nullable=True),
			sa.Column('developer_data', sa.JSON(), nullable=True),
			sa.Column('created_at', sa.DateTime(), nullable=False),
			sa.Column('updated_at', sa.DateTime(), nullable=False),
			sa.ForeignKeyConstraint(['document_id'], ['documents.id'], ondelete='CASCADE'),
			sa.PrimaryKeyConstraint('id'),
			mysql_charset='utf8mb4'
		)
		
		# Create indexes
		op.create_index('ix_document_lines_document_id', 'document_lines', ['document_id'])


def downgrade() -> None:
	op.drop_index('ix_document_lines_document_id', table_name='document_lines')
	op.drop_table('document_lines')