import { isNil } from 'lodash'

import { CompetitionCompetitor } from '../../../models/ranking/competition/competitor'

type CompetitorsLevel = {
  scored: CompetitionCompetitor[]
  valued: CompetitionCompetitor[]
  noHistoryOrUnsubscriber: CompetitionCompetitor[]
}

export abstract class GenericOrdenator {
  static sort(competitors: CompetitionCompetitor[]): CompetitionCompetitor[] {
    const { scored, valued, noHistoryOrUnsubscriber } = this.extractLevels(competitors)

    return [
      ...this.sortScored(scored),
      ...this.sortValued(valued),
      ...this.sortNoHistoryOrUnsubscriber(noHistoryOrUnsubscriber),
    ]
  }

  protected static sortScored(competitors: CompetitionCompetitor[]): CompetitionCompetitor[] {
    return competitors
  }

  protected static sortValued(competitors: CompetitionCompetitor[]): CompetitionCompetitor[] {
    return competitors
  }

  protected static sortNoHistoryOrUnsubscriber(competitors: CompetitionCompetitor[]): CompetitionCompetitor[] {
    return competitors
  }

  protected static extractLevels(competitors: CompetitionCompetitor[]): CompetitorsLevel {
    const scored = competitors.filter(competitor => competitor.score !== 0 && competitor.is_subscriber)
    const valued = competitors.filter(
      competitor => competitor.score == 0 && competitor.lastHistory?.value > 0 && competitor.is_subscriber,
    )
    const noHistoryOrUnsubscriber = competitors.filter(
      competitor => isNil(competitor.lastHistory) || !competitor.is_subscriber,
    )

    return { scored, valued, noHistoryOrUnsubscriber }
  }
}