import { BaseCommand, args, flags } from '@adonisjs/core/ace'
import { CommandOptions } from '@adonisjs/core/types/ace'
import NntpService from '#services/NntpService'
import SeedOrchestrator from '#services/SeedOrchestrator'

/**
 * Plans seed ranges (CONCEPT.md D38) for groups, from below what live
 * indexing, the backfill and earlier plans cover down to `--days` back (or
 * the server's oldest article). A group's backfill stops where its plan
 * starts. Ranges are interleaved across groups, newest first.
 *
 *   node ace seed:plan alt.binaries.ath alt.binaries.mom --days 365
 */
export default class SeedPlan extends BaseCommand {
  public static commandName = 'seed:plan'
  public static description = 'Plans article ranges of groups for seeding nodes to lease.'

  public static options: CommandOptions = {
    startApp: true,
  }

  @args.spread({ description: 'Groups' })
  declare groups: string[]

  @flags.number({ description: 'How many days back (default: everything the server has)' })
  declare days?: number

  @flags.number({ description: 'Articles per range', default: 2_000_000 })
  declare size: number

  public async run() {
    try {
      const summary = await SeedOrchestrator.plan(this.groups, { days: this.days, size: this.size })
      for (const s of summary) {
        this.logger.info(`${s.group}: ${s.ranges.toLocaleString('en')} ranges, articles ${s.from.toLocaleString('en')}–${s.to.toLocaleString('en')}.`)
      }
    } finally {
      await NntpService.shutdown()
    }
  }
}