from alembic import op
import sqlalchemy as sa

# revision identifiers, used by Alembic.
revision = '0001_init'
down_revision = None
branch_labels = None
depends_on = None

def upgrade() -> None:
    op.create_table('users',
        sa.Column('id', sa.Integer(), primary_key=True),
        sa.Column('tg_id', sa.BigInteger(), nullable=False, unique=True, index=True),
        sa.Column('name', sa.String(length=255)),
        sa.Column('created_at', sa.DateTime(), nullable=False),
    )

    op.create_table('chats',
        sa.Column('id', sa.Integer(), primary_key=True),
        sa.Column('chat_id', sa.BigInteger(), nullable=False, unique=True, index=True),
        sa.Column('type', sa.String(length=32)),
        sa.Column('title', sa.String(length=255)),
        sa.Column('owner_user_id', sa.Integer(), sa.ForeignKey('users.id'), index=True),
        sa.Column('can_post', sa.Boolean(), nullable=False, server_default=sa.text('false')),
        sa.Column('created_at', sa.DateTime(), nullable=False),
    )

    op.create_table('drafts',
        sa.Column('id', sa.Integer(), primary_key=True),
        sa.Column('user_id', sa.Integer(), sa.ForeignKey('users.id'), index=True),
        sa.Column('text', sa.Text()),
        sa.Column('status', sa.String(length=16), index=True, server_default='editing'),
        sa.Column('created_at', sa.DateTime(), nullable=False),
        sa.Column('updated_at', sa.DateTime(), nullable=False),
    )

    op.create_table('draft_media',
        sa.Column('id', sa.Integer(), primary_key=True),
        sa.Column('draft_id', sa.Integer(), sa.ForeignKey('drafts.id'), index=True),
        sa.Column('kind', sa.String(length=16)),
        sa.Column('file_id', sa.String(length=255)),
        sa.Column('order', sa.Integer(), server_default='0'),
    )

    op.create_table('deliveries',
        sa.Column('id', sa.Integer(), primary_key=True),
        sa.Column('draft_id', sa.Integer(), sa.ForeignKey('drafts.id'), index=True),
        sa.Column('chat_id', sa.BigInteger(), index=True),
        sa.Column('status', sa.String(length=16), index=True, server_default='new'),
        sa.Column('error', sa.Text()),
        sa.Column('message_ids', sa.Text()),
        sa.Column('created_at', sa.DateTime(), nullable=False),
    )

def downgrade() -> None:
    op.drop_table('deliveries')
    op.drop_table('draft_media')
    op.drop_table('drafts')
    op.drop_table('chats')
    op.drop_table('users')