export const distanceKm = (meters: number | null | undefined): string =>
  meters === null || meters === undefined
    ? '-'
    : `${(meters / 1000).toLocaleString('de-DE', {
        maximumFractionDigits: 2,
      })} km`;

export const distanceMeters = (meters: number | null | undefined): string =>
  meters === null || meters === undefined
    ? '-'
    : `${Math.round(meters).toLocaleString('de-DE')} m`;

export const duration = (seconds: number | null | undefined): string => {
  if (seconds === null || seconds === undefined) {
    return '-';
  }

  const hours = Math.floor(seconds / 3600);
  const minutes = Math.floor((seconds % 3600) / 60);
  const remainingSeconds = Math.round(seconds % 60);

  if (hours > 0) {
    return `${hours} h ${minutes.toString().padStart(2, '0')} min`;
  }
  return `${minutes}:${remainingSeconds.toString().padStart(2, '0')} min`;
};

export const elevation = (meters: number | null | undefined): string =>
  meters === null || meters === undefined
    ? '-'
    : `${Math.round(meters).toLocaleString('de-DE')} m`;

export const speed = (metersPerSecond: number | null | undefined): string =>
  metersPerSecond
    ? `${(metersPerSecond * 3.6).toLocaleString('de-DE', {
        maximumFractionDigits: 1,
      })} km/h`
    : '-';

export const pace = (
  seconds: number | null | undefined,
  suffix = '/km',
): string => {
  if (!seconds) {
    return '-';
  }

  const minutes = Math.floor(seconds / 60);
  const remainingSeconds = Math.round(seconds % 60)
    .toString()
    .padStart(2, '0');
  return `${minutes}:${remainingSeconds} ${suffix}`;
};

export const number = (
  value: number | null | undefined,
  suffix = '',
  maximumFractionDigits = 0,
): string =>
  value === null || value === undefined
    ? '-'
    : `${value.toLocaleString('de-DE', { maximumFractionDigits })}${suffix}`;

export const shortDate = (value: string | null | undefined): string => {
  if (!value) {
    return '-';
  }

  return new Intl.DateTimeFormat('de-DE', {
    day: '2-digit',
    month: '2-digit',
    year: '2-digit',
  }).format(new Date(value));
};

export const dateTime = (value: string | null | undefined): string => {
  if (!value) {
    return '-';
  }

  return new Intl.DateTimeFormat('de-DE', {
    day: '2-digit',
    month: '2-digit',
    year: 'numeric',
    hour: '2-digit',
    minute: '2-digit',
  }).format(new Date(value));
};