"""message file attachments

Revision ID: 5b1a142dc271
Revises: 456cd78ca571
Create Date: 2026-08-14 21:53:05.055721

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = '5b1a142dc271'
down_revision: Union[str, Sequence[str], None] = '456cd78ca571'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    """Upgrade schema."""
    # ### commands auto generated by Alembic - please adjust! ###
    op.create_table('message_files',
    sa.Column('id', sa.Uuid(), nullable=False),
    sa.Column('room_id', sa.Uuid(), nullable=False),
    sa.Column('uploaded_by', sa.Uuid(), nullable=False),
    sa.Column('storage_filename', sa.String(length=64), nullable=False),
    sa.Column('original_filename', sa.String(length=255), nullable=False),
    sa.Column('content_type', sa.String(length=150), nullable=False),
    sa.Column('size_bytes', sa.BigInteger(), nullable=False),
    sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('now()'), nullable=False),
    sa.ForeignKeyConstraint(['room_id'], ['rooms.id'], ),
    sa.ForeignKeyConstraint(['uploaded_by'], ['users.id'], ),
    sa.PrimaryKeyConstraint('id')
    )
    op.create_index(op.f('ix_message_files_room_id'), 'message_files', ['room_id'], unique=False)
    op.add_column('messages', sa.Column('file_id', sa.Uuid(), nullable=True))
    op.create_foreign_key('messages_file_id_fkey', 'messages', 'message_files', ['file_id'], ['id'])
    op.drop_constraint(op.f('messages_content_or_image_required'), 'messages', type_='check')
    op.create_check_constraint('messages_content_or_attachment_required', 'messages', 'content IS NOT NULL OR image_id IS NOT NULL OR file_id IS NOT NULL')
    # ### end Alembic commands ###


def downgrade() -> None:
    """Downgrade schema."""
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_constraint('messages_content_or_attachment_required', 'messages', type_='check')
    op.create_check_constraint(op.f('messages_content_or_image_required'), 'messages', 'content IS NOT NULL OR image_id IS NOT NULL')
    op.drop_constraint('messages_file_id_fkey', 'messages', type_='foreignkey')
    op.drop_column('messages', 'file_id')
    op.drop_index(op.f('ix_message_files_room_id'), table_name='message_files')
    op.drop_table('message_files')
    # ### end Alembic commands ###