nise/nise-frontend/src/app/view-score/view-score.component.ts

import {Component, OnInit, ViewChild} from '@angular/core';
import {ChartConfiguration, ChartData, DefaultDataPoint} from 'chart.js';
import {BaseChartDirective, NgChartsModule} from 'ng2-charts';
import {HttpClient} from "@angular/common/http";
import {environment} from "../../environments/environment";
import {DecimalPipe, JsonPipe, NgForOf, NgIf, NgOptimizedImage} from "@angular/common";
import {ActivatedRoute, RouterLink} from "@angular/router";
import {catchError, throwError} from "rxjs";
import {DistributionEntry, ReplayData, ReplayDataChart} from "../replays";
import {calculateAccuracy} from "../format";
import {Title} from "@angular/platform-browser";
import {OsuGradeComponent} from "../../corelib/components/osu-grade/osu-grade.component";

@Component({
  selector: 'app-view-score',
  standalone: true,
  imports: [
    NgChartsModule,
    JsonPipe,
    NgIf,
    DecimalPipe,
    NgForOf,
    NgOptimizedImage,
    RouterLink,
    OsuGradeComponent
  ],
  templateUrl: './view-score.component.html',
  styleUrl: './view-score.component.css'
})
export class ViewScoreComponent implements OnInit {

  @ViewChild(BaseChartDirective)
  public chart!: BaseChartDirective;

  isLoading = false;
  error: string | null = null;
  replayData: ReplayData | null = null;
  replayId: number | null = null;

  public barChartLegend = true;
  public barChartPlugins = [];

  public barChartData: ChartConfiguration<'bar'>['data'] = {
    labels: [],
    datasets: [
      { data: [], label: 'Miss (%)', backgroundColor: 'rgba(255,0,0,0.66)', borderRadius: 5 },
      { data: [], label: '50 (%)', backgroundColor: 'rgba(187,129,33,0.66)', borderRadius: 5 },
      { data: [], label: '100 (%)', backgroundColor: 'rgba(219,255,0,0.8)', borderRadius: 5 },
      { data: [], label: '300 (%)', backgroundColor: 'rgba(0,255,41,0.66)', borderRadius: 5 }
    ],
  };

  public barChartOptions: ChartConfiguration<'bar'>['options'] = {
    responsive: true,
    scales: {
      x: {
        stacked: true,
      },
      y: {
        stacked: true
      }
    }
  };

  constructor(private http: HttpClient,
              private activatedRoute: ActivatedRoute,
              private title: Title
  ) {}

  ngOnInit(): void {
    this.activatedRoute.params.subscribe(params => {
      this.replayId = params['replayId'];
      if (this.replayId) {
        this.loadScoreData();
      }
    });
  }

  buildChartData(chart: ReplayDataChart): ChartData<"bar", DefaultDataPoint<"bar">, any> {
    const sortedData = chart.data.sort((a, b) => a.first - b.first);

    const minFirst = Math.floor(sortedData[0].first / 2) * 2; // Round down to nearest even number
    const maxFirst = Math.ceil(sortedData[sortedData.length - 1].first / 2) * 2; // Round up to nearest even number
    const groupRanges = Array.from({length: (maxFirst - minFirst) / 2 + 1}, (_, i) => minFirst + i * 2);

    const groupedData = groupRanges.map(rangeStart => {
      const rangeEnd = rangeStart + 2;
      const entriesInGroup = sortedData.filter(e => e.first >= rangeStart && e.first < rangeEnd);
      const sumSecond = entriesInGroup.reduce((acc, curr) => acc + curr.second, 0);
      return { first: rangeStart, second: sumSecond };
    });

    const labels = groupedData.map(({ first }) => `${first}ms to ${first + 2}ms`);
    const datasets = [
      {
        data: groupedData.map(({ second }) => second),
        label: chart.title + " (%)",
        backgroundColor: 'rgba(0,255,41,0.66)',
        borderRadius: 5
      }
    ];

    return { labels, datasets };
  }


  buildCircleguardUrl(): string {
    if(!this.replayData) {
      return "";
    }

    let url = "circleguard://m=" + this.replayData.beatmap_id + "&u=" + this.replayData.user_id;

    if (this.replayData.mods.length > 0) {
      url += "&m1=" + this.replayData.mods.join('');
    }

    return url;
  }

  private loadScoreData(): void {
    this.isLoading = true;
    this.http.get<ReplayData>(`${environment.apiUrl}/score/${this.replayId}`).pipe(
      catchError(error => {
        this.isLoading = false;
        return throwError(() => new Error('An error occurred with the request: ' + error.message));
      })
    ).subscribe({
      next: (response) => {
        this.isLoading = false;
        this.replayData = response;

        this.title.setTitle(
          `${this.replayData.username} on ${this.replayData.beatmap_title} (${this.replayData.beatmap_version})`
        )

        let errorDistribution = Object.entries(this.replayData.error_distribution);

        if (errorDistribution.length > 1) {
          const sortedEntries = errorDistribution
            .sort((a, b) => parseInt(a[0]) - parseInt(b[0]));

          this.barChartData.labels = this.generateLabelsFromEntries(sortedEntries);
          for (let i = 0; i < 4; i++) {
            this.barChartData.datasets[i].data = this.generateChartDataFromEntries(sortedEntries, i);
          }
        }

      },
      error: (error) => {
        this.error = error;
      }
    });
  }

  private getChartRange(entries: [string, DistributionEntry][]): [number, number] {
    const keys = entries.map(([key, _]) => parseInt(key));

    const minKey = Math.min(...keys);
    const maxKey = Math.max(...keys);

    return [minKey, maxKey];
  }

  private generateLabelsFromEntries(entries: [string, DistributionEntry][]): string[] {
    const range = this.getChartRange(entries);

    const labelEntries = [];
    for (let key = range[0]; key <= range[1]; key += 2) {
      const endKey = key + 2;
      labelEntries.push(`${key}ms to ${endKey}ms`);
    }

    if (range[1] % 2 !== range[0] % 2) {
      labelEntries.push(`${range[1]}ms to ${range[1] + 1}ms`);
    }

    return labelEntries;
  }

  private generateChartDataFromEntries(entries: [string, DistributionEntry][], i: number): number[] {
    const range = this.getChartRange(entries);

    const defaultPercentageValues: DistributionEntry = {
      percentageMiss: 0,
      percentage50: 0,
      percentage100: 0,
      percentage300: 0,
    };

    const entriesMap = new Map<number, DistributionEntry>(entries.map(([key, value]) => [parseInt(key), value]));

    const chartData = [];
    for (let key = range[0]; key <= range[1]; key += 2) {
      const currentEntry = entriesMap.get(key) || { ...defaultPercentageValues };
      const nextEntry = entriesMap.get(key + 1) || { ...defaultPercentageValues };

      const sumEntry: DistributionEntry = {
        percentageMiss: currentEntry.percentageMiss + nextEntry.percentageMiss,
        percentage50: currentEntry.percentage50 + nextEntry.percentage50,
        percentage100: currentEntry.percentage100 + nextEntry.percentage100,
        percentage300: currentEntry.percentage300 + nextEntry.percentage300,
      };

      chartData.push(sumEntry);
    }

    // Handle the case where the last key is not included because of an odd number of total keys
    if (range[1] % 2 !== range[0] % 2) {
      const lastEntry = entriesMap.get(range[1]) || { ...defaultPercentageValues };
      chartData.push(lastEntry);
    }

    const propertyMap = ['percentageMiss', 'percentage50', 'percentage100', 'percentage300'];
    if (i >= 0 && i < propertyMap.length) {
      return chartData.map(entry => entry[propertyMap[i] as keyof DistributionEntry]);
    }

    return [];
  }

  protected readonly Object = Object;
  protected readonly calculateAccuracy = calculateAccuracy;

}