frontend/src/utils/helpers.ts

import clsx from 'clsx';
import { twMerge } from 'tailwind-merge';

export function cn(...inputs: any[]) {
  return twMerge(clsx(inputs));
}

export function truncate(str: string, length: number = 100): string {
  if (str.length <= length) return str;
  return str.slice(0, length) + '...';
}

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

export function formatTime(date: Date | string): string {
  const d = typeof date === 'string' ? new Date(date) : date;
  return d.toLocaleTimeString('en-US', {
    hour: '2-digit',
    minute: '2-digit',
  });
}

export function downloadFile(blob: Blob, filename: string): void {
  const url = window.URL.createObjectURL(blob);
  const link = document.createElement('a');
  link.href = url;
  link.download = filename;
  document.body.appendChild(link);
  link.click();
  document.body.removeChild(link);
  window.URL.revokeObjectURL(url);
}

export function formatFileSize(bytes: number): string {
  if (bytes === 0) return '0 Bytes';
  const k = 1024;
  const sizes = ['Bytes', 'KB', 'MB', 'GB'];
  const i = Math.floor(Math.log(bytes) / Math.log(k));
  return Math.round((bytes / Math.pow(k, i)) * 100) / 100 + ' ' + sizes[i];
}

export function formatNumber(num: number): string {
  return new Intl.NumberFormat('en-US').format(num);
}

export function getInitials(name: string): string {
  return name
    .split(' ')
    .map((n) => n[0])
    .join('')
    .toUpperCase()
    .slice(0, 2);
}

export async function readFileAsArrayBuffer(file: File): Promise<ArrayBuffer> {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.onload = (e) => {
      if (e.target?.result instanceof ArrayBuffer) {
        resolve(e.target.result);
      } else {
        reject(new Error('Failed to read file'));
      }
    };
    reader.onerror = () => reject(new Error('File read error'));
    reader.readAsArrayBuffer(file);
  });
}

export const COLORS = {
  primary: '#22c55e', // emerald-500
  primaryDark: '#15803d', // emerald-700
  background: '#0A0E27',
  backgroundLight: '#1a1f3a',
  text: '#f8fafc',
  textMuted: '#cbd5e1',
  border: '#334155',
  success: '#22c55e',
  error: '#ef4444',
  warning: '#f59e0b',
  info: '#3b82f6',
};