import {Component, Input, OnChanges, OnInit, SimpleChanges} from '@angular/core';
import {ChampionshipService} from '../../championship.service';
import {ActivatedRoute} from '@angular/router';
import {distinct, distinctUntilChanged, map} from 'rxjs/operators';
import {combineLatest, Subscription, timer} from 'rxjs';
import {TopmenuService} from '../../topmenu.service';

@Component({
  selector: 'app-poule',
  templateUrl: './poule.component.html',
  styleUrls: ['./poule.component.scss']
})
export class PouleComponent implements OnInit {

  public teams: any[] = [];
  public times: any[] = [];
  public teamtotaltimes: {};

  public maxRaces = 0;
  private timesIndexed: {};
  // these are the best two times for each team, indexed by their id
  public bestTwo: {};
  public maxLaps = 0;
  private subscription: Subscription;

  constructor(private championshipService: ChampionshipService, private route: ActivatedRoute, private topmenuService: TopmenuService) {
  }

  ngOnInit() {
    const tier$ = this.route.params.pipe(map(v => v['tier']), distinctUntilChanged());
    const poule$ = this.route.params.pipe(map(v => v['poule']), distinctUntilChanged());
    const championship$ = this.route.parent.params.pipe(map(v => v['idchampionship']), distinctUntilChanged());

    combineLatest(tier$, poule$, championship$).subscribe(([tier, poule, championship]) => {
      console.log('tier/poule/champ changed');
      console.log(tier);
      console.log(poule);
      console.log(championship);

      if(this.subscription) {
        this.subscription.unsubscribe();
        this.subscription = undefined;
      }

      this.championshipService.getPoules(tier, championship).subscribe(poules => {
        this.topmenuService.setPoules(poules);
      });

      this.topmenuService.setPoule(poule);
      this.topmenuService.setTier(tier);

      // load the data
      this.subscription = timer(0, 5000).subscribe(t => {
        this.loadData();
      });
    });

  }

  get poule() {
    return this.topmenuService.poule$.value;
  }
  get tier() {
    return this.topmenuService.tier$.value;
  }

  private loadData() {
    // this.teams = [];
    // this.times = [];

    console.log('loading data.');

    // fetch the poule data
    this.championshipService.getTeamsInPoule(this.topmenuService.championship$.value, this.topmenuService.tier$.value,
      this.topmenuService.poule$.value)
      .subscribe(val => {
        this.teams = val;

        // calculate the maximum of the racecounts... this influences the amount of columns in the table
        let maxRaces = 0;
        this.teams.forEach(t => {
          if (t.racecount > maxRaces) {
            maxRaces = t.racecount;
          }
        });
        this.maxRaces = maxRaces;
      });
    this.championshipService.getTimesInPoule(this.topmenuService.championship$.value, this.topmenuService.tier$.value,
      this.topmenuService.poule$.value).subscribe(val => {
      this.times = val;

      // preprocess this array -> map idteam on the laptime array so we can index it using 0..n-1
      this.timesIndexed = {};
      this.teamtotaltimes = {};
      this.maxLaps = 0;
      this.bestTwo = {};
      this.times.forEach(t => {
        if (!this.timesIndexed[t.idteam]) {
          this.timesIndexed[t.idteam] = [];
        }
        this.timesIndexed[t.idteam].push({laptimesms: t.laptimesms, penaltysum: t.penaltysum});
        if (t.laptimesms.length > this.maxLaps) {
          this.maxLaps = t.laptimesms.length;
        }

        // get the list of times, sorted, for each team
        if (!this.teamtotaltimes[t.idteam]) {
          this.teamtotaltimes[t.idteam] = [];
        }
        const sum = t.laptimesms.reduce((prev, next) => {
          return prev + next;
        });
        this.teamtotaltimes[t.idteam].push(+(sum + (t.penaltysum * 1000)));

        // calculate the best two
        this.bestTwo[t.idteam] = this.getBestTwo(t.idteam);
      });

      console.log('totaltimes');
      console.log(this.teamtotaltimes);
      Object.keys(this.teamtotaltimes).forEach(key => {
        this.teamtotaltimes[key].sort((a, b) => {
            if (a < b) {
              return -1;
            } else if (a === b) {
              return 0;
            } else {
              return 1;
            }
          }
        );
      });


    });
  }

  getPenaltySum(raceNr: number, idTeam: number) {
    if (!this.timesIndexed
      || !this.timesIndexed[idTeam]
      || !this.timesIndexed[idTeam][raceNr]
      || !this.timesIndexed[idTeam][raceNr].penaltysum) {
      return null;
    }
    const penaltysum = this.timesIndexed[idTeam][raceNr].penaltysum;
    if (!penaltysum) {
      return null;
    }
    return penaltysum;
  }

  /**
   * Get the best two racetimes (including penalties)
   * @param idTeam
   */
  private getBestTwo(idTeam: number): number[] {
    if (!this.timesIndexed) {
      return null;
    }
    // first take all the values... calculate the averages
    // each time is the total of a race
    const teamTimes = this.timesIndexed[idTeam];

    if (!teamTimes || teamTimes.length < 2) {
      return null;
    }

    const totalTimes: number[] = [];
    for (let raceNr = 0; raceNr < this.maxRaces; raceNr++) {
      const raceTime = this.getRaceTime(raceNr, idTeam);
      if (raceTime) {
        // ADD THE PENALTY HERE!
        const items = raceTime + this.getPenaltySum(raceNr, idTeam) * 1000;
        totalTimes.push(items);
      }
    }

    // averages are calculated... sort them
    totalTimes.sort((a, b) => {
        if (a < b) {
          return -1;
        } else if (a === b) {
          return 0;
        } else {
          return 1;
        }
      }
    );

    // take the two lowest
    totalTimes.splice(2);
    return totalTimes;
  }

  /**
   * Get avg of best two in milliseconds.
   * @param idTeam
   */
  getAvgOfBestTwo(idTeam: number) {
    if (this.bestTwo && this.bestTwo[idTeam] && this.bestTwo[idTeam].length === 2) {
      return (this.bestTwo[idTeam][0] + this.bestTwo[idTeam][1]) / 2;
    } else {
      return null;
    }
  }

  getPenalisedRaceTime(raceNr: number, idTeam: number): number {
    return this.getRaceTime(raceNr, idTeam) + (this.getPenaltySum(raceNr, idTeam) * 1000);
  }

  getRaceTime(raceNr: number, idTeam: number): number {
    const time = this.getLapTimes(raceNr, idTeam);
    if (!time) {
      return null;
    }
    return time.reduce((previousValue, currentValue) => {
      return currentValue + previousValue;
    });
  }

  getRaceTimeMinutes(raceNr: number, idTeam: number): number {
    return Math.floor(this.getRaceTime(raceNr, idTeam) / 1000 / 60);
  }

  getRaceTimeSeconds(raceNr: number, idTeam: number): string {
    const raceTime = this.getRaceTime(raceNr, idTeam);
    return ((raceTime / 1000) % 60).toFixed(2);
  }

  getLapTimes(raceNr: number, idTeam: number): number[] {
    if (!this.timesIndexed
      || !this.timesIndexed[idTeam]
      || !this.timesIndexed[idTeam][raceNr]
      || !this.timesIndexed[idTeam][raceNr].laptimesms) {
      return null;
    }
    return this.timesIndexed[idTeam][raceNr].laptimesms;
  }

  getLapTime(idTeam: number, raceNr: number, lapNr: number) {
    const lapTime = this.getLapTimes(raceNr, idTeam);
    if (lapTime) {
      return lapTime[lapNr];
    } else {
      return null;
    }
  }

  getTimeRank(raceindex, idteam: any) {
    if (!this.teamtotaltimes || !this.teamtotaltimes[idteam]) {
      return -1;
    }
    let penalisedRaceTime = this.getPenalisedRaceTime(raceindex, idteam);
    let indexOf = this.teamtotaltimes[idteam].indexOf(penalisedRaceTime);
    return indexOf;
  }
}