"""Initial history tables

Revision ID: a15fde9a62df
Revises: 
Create Date: 2026-02-07 21:18:57.524534

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = 'a15fde9a62df'
down_revision: Union[str, Sequence[str], None] = None
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('users',
    sa.Column('id', sa.String(), nullable=False),
    sa.Column('username', sa.String(), nullable=False),
    sa.Column('password_hash', sa.String(), nullable=True),
    sa.Column('display_name', sa.String(), nullable=True),
    sa.PrimaryKeyConstraint('id')
    )
    op.create_index(op.f('ix_users_username'), 'users', ['username'], unique=True)
    op.create_table('conversations',
    sa.Column('id', sa.String(), nullable=False),
    sa.Column('user_id', sa.String(), nullable=False),
    sa.Column('data_state', sa.String(), nullable=False),
    sa.Column('name', sa.String(), nullable=False),
    sa.Column('created_at', sa.DateTime(), nullable=False),
    sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
    sa.PrimaryKeyConstraint('id')
    )
    op.create_table('messages',
    sa.Column('id', sa.String(), nullable=False),
    sa.Column('conversation_id', sa.String(), nullable=False),
    sa.Column('role', sa.String(), nullable=False),
    sa.Column('content', sa.Text(), nullable=False),
    sa.Column('created_at', sa.DateTime(), nullable=False),
    sa.ForeignKeyConstraint(['conversation_id'], ['conversations.id'], ),
    sa.PrimaryKeyConstraint('id')
    )
    op.create_table('plots',
    sa.Column('id', sa.String(), nullable=False),
    sa.Column('message_id', sa.String(), nullable=False),
    sa.Column('image_data', sa.LargeBinary(), nullable=False),
    sa.ForeignKeyConstraint(['message_id'], ['messages.id'], ),
    sa.PrimaryKeyConstraint('id')
    )
    # ### end Alembic commands ###


def downgrade() -> None:
    """Downgrade schema."""
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_table('plots')
    op.drop_table('messages')
    op.drop_table('conversations')
    op.drop_index(op.f('ix_users_username'), table_name='users')
    op.drop_table('users')
    # ### end Alembic commands ###