import { EntityObject } from '@DocumentsManager/models/entity'

/**
 * Get the appropriate icon for a file based on its MIME type
 */
export function getFileIcon(entity: EntityObject): string {
  const mime = entity.properties.mime || ''
  if (!mime) return 'mdi-file'
  if (mime.startsWith('image/')) return 'mdi-file-image'
  if (mime.startsWith('video/')) return 'mdi-file-video'
  if (mime.startsWith('audio/')) return 'mdi-file-music'
  if (mime.startsWith('text/')) return 'mdi-file-document'
  if (mime === 'application/pdf') return 'mdi-file-pdf-box'
  if (mime.includes('zip') || mime.includes('tar') || mime.includes('compressed')) return 'mdi-folder-zip'
  if (mime.includes('word') || mime.includes('document')) return 'mdi-file-word'
  if (mime.includes('excel') || mime.includes('spreadsheet')) return 'mdi-file-excel'
  if (mime.includes('powerpoint') || mime.includes('presentation')) return 'mdi-file-powerpoint'
  return 'mdi-file'
}

/**
 * Format file size in human readable format
 */
export function formatSize(bytes: number): string {
  const safeBytes = Number.isFinite(bytes) ? bytes : 0
  if (safeBytes === 0) return '0 B'
  const k = 1024
  const sizes = ['B', 'KB', 'MB', 'GB', 'TB']
  const i = Math.floor(Math.log(safeBytes) / Math.log(k))
  return parseFloat((safeBytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i]
}

/**
 * Format date string to localized format
 */
export function formatDate(value: Date | string | null | undefined): string {
  if (!value) return '—'
  const date = value instanceof Date ? value : new Date(value)
  if (Number.isNaN(date.getTime())) return '—'
  return date.toLocaleDateString('en-US', {
    year: 'numeric',
    month: 'short',
    day: 'numeric',
  })
}

/**
 * Get upload status icon
 */
export function getUploadStatusIcon(status: string): string {
  switch (status) {
    case 'pending': return 'mdi-clock-outline'
    case 'uploading': return 'mdi-loading mdi-spin'
    case 'completed': return 'mdi-check-circle'
    case 'error': return 'mdi-alert-circle'
    default: return 'mdi-file'
  }
}

/**
 * Get upload status color
 */
export function getUploadStatusColor(status: string): string {
  switch (status) {
    case 'pending': return 'grey'
    case 'uploading': return 'primary'
    case 'completed': return 'success'
    case 'error': return 'error'
    default: return 'grey'
  }
}