import {
  Timeline,
  TimelineContent,
  TimelineDate,
  TimelineHeader,
  TimelineIndicator,
  TimelineItem,
  TimelineSeparator,
  TimelineTitle,
} from '@/components/reui/timeline'
import { Badge } from '@/components/reui/badge'
import { jobStatusRu, jobTriggerRu } from '@/lib/ui-labels'
import type { JobRow } from '@/types/api'

/**
 * ReUI Timeline в раскрытии строки задач: создана → взята в работу → результат.
 * Активный шаг выводится из фактических отметок времени задачи.
 * @see https://reui.io/docs/components/base/timeline
 */

const ruDateTime = (value: string | null | undefined) =>
  value ? new Date(value).toLocaleString('ru-RU') : undefined

function resultSubtitle(job: JobRow): string | undefined {
  if (job.error) return job.error
  const summary = job.meta?.apply_summary
  if (summary && typeof summary === 'object') {
    const message = (summary as Record<string, unknown>).message
    if (typeof message === 'string' && message !== '') return message
  }
  return undefined
}

function applyCounts(job: JobRow) {
  const value = job.meta?.apply_summary
  if (!value || typeof value !== 'object') return undefined
  const summary = value as Record<string, unknown>
  const count = (key: string) => typeof summary[key] === 'number' ? summary[key] as number : undefined
  return {
    published: count('published_count'),
    applied: count('applied_count'),
    unconfirmed: count('unconfirmed_count'),
    failed: count('failed_count'),
  }
}

function dispatchConfirmations(job: JobRow): string[] {
  const dispatch = job.meta?.node_dispatch
  if (!dispatch || typeof dispatch !== 'object') return []
  const results = (dispatch as Record<string, unknown>).results
  if (!Array.isArray(results)) return []
  return results.flatMap((item) => {
    if (!item || typeof item !== 'object') return []
    const result = item as Record<string, unknown>
    const speaker = typeof result.speaker_id === 'string' ? result.speaker_id.slice(0, 8) : 'Спикер'
    const label = result.confirmation === 'agent_reported'
      ? 'агент подтвердил'
      : result.confirmation === 'local_applied'
        ? 'применено локально'
        : result.confirmation === 'unconfirmed'
          ? 'без подтверждения агента'
          : 'подтверждение не указано'
    return [`${speaker}: ${label}`]
  })
}

export function JobTimeline({ job }: { job: JobRow }) {
  const trigger = jobTriggerRu(job.meta?.trigger)
  const completed = job.finished_at ? 3 : job.started_at ? 2 : 1
  const failed = ['failed', 'error'].includes(job.status.toLowerCase())
  const subtitle = resultSubtitle(job)
  const counts = applyCounts(job)
  const confirmations = dispatchConfirmations(job)

  return (
    <div className="py-4 ps-3 pe-2">
      <Timeline defaultValue={completed}>
        <TimelineItem step={1}>
          <TimelineHeader>
            <TimelineDate>{ruDateTime(job.created_at)}</TimelineDate>
            <TimelineTitle>Создана{trigger ? ` (${trigger})` : ''}</TimelineTitle>
          </TimelineHeader>
          <TimelineIndicator />
          <TimelineSeparator />
          <TimelineContent>Идентификатор: {job.job_id}</TimelineContent>
        </TimelineItem>
        <TimelineItem step={2}>
          <TimelineHeader>
            <TimelineDate>{ruDateTime(job.started_at)}</TimelineDate>
            <TimelineTitle>Взята в работу</TimelineTitle>
          </TimelineHeader>
          <TimelineIndicator />
          <TimelineSeparator />
        </TimelineItem>
        <TimelineItem step={3}>
          <TimelineHeader>
            <TimelineDate>{ruDateTime(job.finished_at)}</TimelineDate>
            <TimelineTitle className={failed ? 'text-destructive' : undefined}>
              {job.finished_at ? jobStatusRu(job.status) : 'Ещё выполняется'}
            </TimelineTitle>
          </TimelineHeader>
          <TimelineIndicator />
          <TimelineSeparator />
          {subtitle || counts || confirmations.length > 0 ? (
            <TimelineContent>
              <div className="flex flex-col gap-2">
                {subtitle ? <span>{subtitle}</span> : null}
                {counts ? (
                  <div className="flex flex-wrap gap-2">
                    {counts.published != null ? <Badge variant="info-light" size="sm">Опубликовано: {counts.published}</Badge> : null}
                    {counts.applied != null ? <Badge variant="success-light" size="sm">Подтверждено: {counts.applied}</Badge> : null}
                    {counts.unconfirmed != null && counts.unconfirmed > 0 ? <Badge variant="warning-light" size="sm">Без подтверждения агента: {counts.unconfirmed}</Badge> : null}
                    {counts.failed != null && counts.failed > 0 ? <Badge variant="destructive-light" size="sm">Ошибок: {counts.failed}</Badge> : null}
                  </div>
                ) : null}
                {confirmations.length > 0 ? (
                  <ul className="flex flex-col gap-1 text-xs text-muted-foreground">
                    {confirmations.map((confirmation, index) => <li key={`${index}-${confirmation}`}>{confirmation}</li>)}
                  </ul>
                ) : null}
              </div>
            </TimelineContent>
          ) : null}
        </TimelineItem>
      </Timeline>
    </div>
  )
}