"""add chapter_cover_intents

Revision ID: 0006_chapter_cover_intents
Revises: 0005_story_image_intents
Create Date: 2026-03-19

"""

from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


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


def upgrade() -> None:
    op.create_table(
        "chapter_cover_intents",
        sa.Column("id", sa.String(), nullable=False),
        sa.Column("chapter_id", sa.String(), nullable=False),
        sa.Column("chapter_version_id", sa.String(), nullable=True),
        sa.Column("story_ids", sa.JSON(), nullable=True),
        sa.Column("prompt_brief", sa.Text(), nullable=True),
        sa.Column("status", sa.String(), nullable=False),
        sa.Column("asset_id", sa.String(), nullable=True),
        sa.Column("error", sa.Text(), nullable=True),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=True),
        sa.ForeignKeyConstraint(["chapter_id"], ["chapters.id"], ondelete="CASCADE"),
        sa.ForeignKeyConstraint(
            ["chapter_version_id"],
            ["chapter_versions.id"],
            ondelete="SET NULL",
        ),
        sa.PrimaryKeyConstraint("id"),
        if_not_exists=True,
    )
    op.create_index(
        op.f("ix_chapter_cover_intents_chapter_id"),
        "chapter_cover_intents",
        ["chapter_id"],
        unique=False,
        if_not_exists=True,
    )


def downgrade() -> None:
    op.drop_index(
        op.f("ix_chapter_cover_intents_chapter_id"),
        table_name="chapter_cover_intents",
    )
    op.drop_table("chapter_cover_intents")