"""Create immutable content citations."""

from __future__ import annotations

import sqlalchemy as sa
from alembic import op

revision = "0010_citations"
down_revision = "0009_content_publication"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        "citations",
        sa.Column("id", sa.Uuid(), primary_key=True),
        sa.Column("workspace_id", sa.Uuid(), nullable=False),
        sa.Column("space_id", sa.Uuid(), nullable=False),
        sa.Column(
            "document_id",
            sa.Uuid(),
            sa.ForeignKey("content.documents.id", ondelete="RESTRICT"),
            nullable=False,
        ),
        sa.Column(
            "document_version_id",
            sa.Uuid(),
            sa.ForeignKey("content.document_versions.id", ondelete="RESTRICT"),
            nullable=False,
        ),
        sa.Column(
            "chunk_id",
            sa.Uuid(),
            sa.ForeignKey("content.chunks.id", ondelete="RESTRICT"),
            nullable=False,
        ),
        sa.Column(
            "parent_chunk_id",
            sa.Uuid(),
            sa.ForeignKey("content.chunks.id", ondelete="RESTRICT"),
            nullable=True,
        ),
        sa.Column("location", sa.JSON(), nullable=False),
        sa.Column("excerpt", sa.Text(), nullable=False),
        sa.Column("excerpt_checksum", sa.String(64), nullable=False),
        sa.Column("source_uri", sa.String(2048), nullable=False),
        sa.Column("acquired_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("retrieval_run_id", sa.Uuid(), nullable=False),
        sa.Column("index_alias", sa.String(256), nullable=False),
        sa.Column("profile_version", sa.String(256), nullable=False),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
        schema="content",
    )
    op.create_index(
        "ix_content_citations_workspace_space",
        "citations",
        ["workspace_id", "space_id"],
        schema="content",
    )
    op.create_index(
        "ix_content_citations_document_version",
        "citations",
        ["document_version_id"],
        schema="content",
    )


def downgrade() -> None:
    op.drop_index(
        "ix_content_citations_document_version",
        table_name="citations",
        schema="content",
    )
    op.drop_index(
        "ix_content_citations_workspace_space",
        table_name="citations",
        schema="content",
    )
    op.drop_table("citations", schema="content")