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

/**
 * The seed orchestrator (CONCEPT.md D38): nodes that lease article ranges
 * over HTTPS and submit what they aggregated (D37), and the ranges planned
 * for them. A range's id is its priority: plans insert newest first.
 */
export default class extends BaseSchema {
  async up() {
    this.schema.createTable('seed_nodes', (table) => {
      table.increments('id')
      table.text('name').notNullable().unique()
      // sha256 of the bearer token; the token itself is shown once, when it's made.
      table.string('token_hash', 64).notNullable().unique()
      table.boolean('disabled').notNullable().defaultTo(false)
      table.timestamp('created_at', { useTz: true }).notNullable().defaultTo(this.now())
      table.timestamp('last_seen_at', { useTz: true }).nullable()
    })

    this.schema.createTable('seed_ranges', (table) => {
      table.bigIncrements('id')
      table.text('group_name').notNullable()
      table.bigInteger('start_id').notNullable()
      table.bigInteger('end_id').notNullable()
      // First article not reported yet; a re-leased range resumes here.
      table.bigInteger('next_id').notNullable()
      table.string('status', 8).notNullable().defaultTo('queued')
      table.integer('node_id').nullable().references('id').inTable('seed_nodes').onDelete('SET NULL')
      table.integer('attempts').notNullable().defaultTo(0)
      table.timestamp('leased_at', { useTz: true }).nullable()
      table.timestamp('heartbeat_at', { useTz: true }).nullable()
      table.timestamp('done_at', { useTz: true }).nullable()
      table.bigInteger('headers').notNullable().defaultTo(0)
      table.bigInteger('files').notNullable().defaultTo(0)
      table.bigInteger('fragments').notNullable().defaultTo(0)
      table.text('error').nullable()
      table.timestamp('created_at', { useTz: true }).notNullable().defaultTo(this.now())
      table.index(['group_name', 'start_id'])
    })
    this.schema.raw(`CREATE INDEX seed_ranges_open_idx ON seed_ranges (id) WHERE status IN ('queued', 'leased')`)
  }

  async down() {
    this.schema.dropTable('seed_ranges')
    this.schema.dropTable('seed_nodes')
  }
}