export function imageContentDisposition(displayName: string, fallbackName: string): string {
  const safeDisplayName = displayName.trim() || fallbackName;
  const fallback = safeDisplayName
    .normalize("NFKD")
    .replace(/[^a-z0-9]+/giu, "-")
    .replace(/^-|-$/gu, "") || fallbackName;
  const encoded = encodeURIComponent(`${safeDisplayName}.png`).replace(
    /['()*]/gu,
    (character) => `%${character.charCodeAt(0).toString(16).toUpperCase()}`,
  );
  return `attachment; filename="${fallback}.png"; filename*=UTF-8''${encoded}`;
}

export interface ConstellationChartRow {
  level: number;
  percent: number;
  isGreat: boolean;
  widthPercent: number;
}

export function constellationChartRows(
  rows: ReadonlyArray<{
    level: number;
    cumulativePercent: string;
    isGreat: boolean;
  }>,
): ConstellationChartRow[] {
  const values = [
    ...rows.map((row) => ({
      level: row.level,
      percent: Number(row.cumulativePercent),
      isGreat: row.isGreat,
    })),
    { level: 0, percent: 100, isGreat: false },
  ].sort((left, right) => right.level - left.level);
  const maximum = Math.max(100, ...values.map((row) => row.percent));

  return values.map((row) => ({
    ...row,
    widthPercent: Math.max(0, Math.min(100, (row.percent / maximum) * 100)),
  }));
}