export const throttle = (
  func: (...args: unknown[]) => void,
  limit: number,
): ((...args: unknown[]) => void) => {
  let lastFunc: ReturnType<typeof setTimeout> | null = null;
  let lastRan: number | null = null;

  return function (this: unknown, ...args: unknown[]) {
    if (lastRan === null) {
      func.apply(this, args);
      lastRan = Date.now();
    } else {
      if (lastFunc !== null) {
        clearTimeout(lastFunc);
      }
      lastFunc = setTimeout(
        () => {
          if (Date.now() - (lastRan as number) >= limit) {
            func.apply(this, args);
            lastRan = Date.now();
          }
        },
        limit - (Date.now() - (lastRan as number)),
      );
    }
  };
};

export function debounce<T extends (...args: unknown[]) => unknown>(
  func: T,
  wait: number,
): (...args: Parameters<T>) => void {
  let timeout: NodeJS.Timeout | null = null;

  return function (...args: Parameters<T>): void {
    if (timeout) {
      clearTimeout(timeout);
    }

    timeout = setTimeout(() => {
      func(...args);
    }, wait);
  };
}

export function uid(): string {
  return (Date.now() + Math.floor(Math.random() * 1000)).toString();
}

export function getInitials(
  name: string | null | undefined,
  count?: number,
): string {
  if (!name || typeof name !== 'string') {
    return '';
  }

  const initials = name
    .split(' ')
    .filter(Boolean)
    .map((part) => part[0].toUpperCase());

  return count && count > 0
    ? initials.slice(0, count).join('')
    : initials.join('');
}

export function toAbsoluteUrl(pathname: string): string {
  const baseUrl = process.env.NEXT_PUBLIC_BASE_PATH;

  if (baseUrl && baseUrl !== '/') {
    return process.env.NEXT_PUBLIC_BASE_PATH + pathname;
  } else {
    return pathname;
  }
}

export function timeAgo(date: Date | string): string {
  const now = new Date();
  const inputDate = typeof date === 'string' ? new Date(date) : date;
  const diff = Math.floor((now.getTime() - inputDate.getTime()) / 1000);

  if (diff < 60) return 'just now';
  if (diff < 3600)
    return `${Math.floor(diff / 60)} minute${Math.floor(diff / 60) > 1 ? 's' : ''} ago`;
  if (diff < 86400)
    return `${Math.floor(diff / 3600)} hour${Math.floor(diff / 3600) > 1 ? 's' : ''} ago`;
  if (diff < 604800)
    return `${Math.floor(diff / 86400)} day${Math.floor(diff / 86400) > 1 ? 's' : ''} ago`;
  if (diff < 2592000)
    return `${Math.floor(diff / 604800)} week${Math.floor(diff / 604800) > 1 ? 's' : ''} ago`;
  if (diff < 31536000)
    return `${Math.floor(diff / 2592000)} month${Math.floor(diff / 2592000) > 1 ? 's' : ''} ago`;

  return `${Math.floor(diff / 31536000)} year${Math.floor(diff / 31536000) > 1 ? 's' : ''} ago`;
}

export function formatDate(input: Date | string | number): string {
  const date = new Date(input);
  return date.toLocaleDateString('en-US', {
    month: 'long',
    day: 'numeric',
    year: 'numeric',
  });
}

export function formatDateTime(input: Date | string | number): string {
  const date = new Date(input);
  return date.toLocaleString('en-US', {
    month: 'long',
    day: 'numeric',
    year: 'numeric',
    hour: 'numeric',
    minute: 'numeric',
    hour12: true,
  });
}