import { type Kysely, sql } from 'kysely';

export async function up(db: Kysely<any>): Promise<void> {
  await db.schema
    .createTable('backlinks')
    .addColumn('id', 'uuid', (col) =>
      col.primaryKey().defaultTo(sql`gen_uuid_v7()`),
    )
    .addColumn('source_page_id', 'uuid', (col) =>
      col.references('pages.id').onDelete('cascade').notNull(),
    )
    .addColumn('target_page_id', 'uuid', (col) =>
      col.references('pages.id').onDelete('cascade').notNull(),
    )
    .addColumn('workspace_id', 'uuid', (col) =>
      col.references('workspaces.id').onDelete('cascade').notNull(),
    )
    .addColumn('created_at', 'timestamptz', (col) =>
      col.notNull().defaultTo(sql`now()`),
    )
    .addColumn('updated_at', 'timestamptz', (col) =>
      col.notNull().defaultTo(sql`now()`),
    )
    .addUniqueConstraint('backlinks_source_page_id_target_page_id_unique', [
      'source_page_id',
      'target_page_id',
    ])
    .execute();
}

export async function down(db: Kysely<any>): Promise<void> {
  await db.schema.dropTable('backlinks').execute();
}