import { BaseCommand, flags } from '@adonisjs/core/ace'
import type { CommandOptions } from '@adonisjs/core/types/ace'
import { Par2Merger } from '#services/par2_merger'

/** The par2 merge (REBUILD.md, phase 2): releases whose files one par2 set describes become one. */
export default class ReleasesMerge extends BaseCommand {
  static commandName = 'releases:merge'
  static description = 'Merges the releases whose files one par2 set describes (what the prober read), every minute'
  static options: CommandOptions = { startApp: true, staysAlive: true }

  @flags.boolean({ description: 'One round over every set, then exit' })
  declare once: boolean

  async run() {
    const merger = new Par2Merger()
    if (this.once) {
      const round = await merger.round()
      this.logger.info(`${round.sets} sets checked: ${round.releases} releases merged into ${round.merges}.`)
      await this.terminate()
      return
    }
    let done: () => void
    const finished = new Promise<void>((resolve) => (done = resolve))
    this.app.terminating(async () => {
      merger.stop()
      await finished
    })
    await merger.run()
    this.logger.info('Merger stopped.')
    done!()
    await this.terminate()
  }
}