import { BaseSchema } from '@adonisjs/lucid/schema'

/**
 * Deferred articles whose headers don't say which file they belong to
 * (ngPost with random subjects and a new poster every few articles, see
 * CONCEPT.md D28). Only the article range per fetch batch is kept;
 * `deferred:expand-ranges` finds the articles again and queues their bodies.
 */
export default class extends BaseSchema {
  async up() {
    this.schema.createTable('deferred_ranges', (table) => {
      table.bigIncrements('id')
      table.text('group_name').notNullable()
      table.bigInteger('first_article').notNullable()
      table.bigInteger('last_article').notNullable()
      table.integer('article_count').notNullable()
      table.bigInteger('bytes').notNullable()
      table.timestamp('created_at', { useTz: true }).notNullable()
      table.timestamp('expanded_at', { useTz: true })
      table.index(['expanded_at', 'id'])
      table.index(['created_at'])
    })
  }

  async down() {
    this.schema.dropTable('deferred_ranges')
  }
}