import vine from '@vinejs/vine'
import type { HttpContext } from '@adonisjs/core/http'
import metricsService, { type HostSample } from '#services/metrics_service'
import { openSse } from '#services/sse'

const historyValidator = vine.create({
  range: vine.enum(['1h', '24h', '7d', '30d'] as const),
})

export default class MetricsController {
  /**
   * Live samples (every 5 s) for the charts of the overview.
   */
  async live(ctx: HttpContext) {
    const channel = openSse(ctx)
    channel.send('init', metricsService.live)

    const onSample = (sample: HostSample) => channel.send('sample', sample)
    metricsService.on('sample', onSample)
    channel.onClose(() => metricsService.off('sample', onSample))
  }

  async history({ request }: HttpContext) {
    const { range } = await historyValidator.validate(request.qs())
    return metricsService.history(range)
  }
}