"""Add word_translations table for multiple translations with context

Revision ID: 20251206_word_translations
Revises: 20251205_wordsource_ai_task
Create Date: 2025-12-06
"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = '20251206_word_translations'
down_revision: Union[str, None] = '20251205_wordsource_ai_task'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        'word_translations',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('vocabulary_id', sa.Integer(), nullable=False),
        sa.Column('translation', sa.String(255), nullable=False),
        sa.Column('context', sa.String(500), nullable=True),
        sa.Column('context_translation', sa.String(500), nullable=True),
        sa.Column('is_primary', sa.Boolean(), nullable=False, server_default='false'),
        sa.Column('created_at', sa.DateTime(), nullable=False, server_default=sa.func.now()),
        sa.PrimaryKeyConstraint('id')
    )
    op.create_index('ix_word_translations_vocabulary_id', 'word_translations', ['vocabulary_id'])


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