"""segments：Phase1/Phase2 标志（叙事延迟管线）

Revision ID: 0006_segment_memoir_phases
Revises: 0005_cleanup_story_links
"""

from typing import Sequence, Union

import sqlalchemy as sa

from alembic import op

revision: str = "0006_segment_memoir_phases"
down_revision: Union[str, None] = "0005_cleanup_story_links"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column(
        "segments",
        sa.Column(
            "narrated",
            sa.Boolean(),
            nullable=False,
            server_default=sa.text("false"),
        ),
    )
    op.add_column(
        "segments",
        sa.Column(
            "skip_narrative",
            sa.Boolean(),
            nullable=False,
            server_default=sa.text("false"),
        ),
    )


def downgrade() -> None:
    op.drop_column("segments", "skip_narrative")
    op.drop_column("segments", "narrated")