export const CERTIFICATE_REPORT_MATERIAL_TYPE = '证书-检测报告'

export const CERTIFICATE_REPORT_ASSET_TYPE = {
  PDF: 'report-pdf',
  IMAGE: 'report-image',
} as const

export const CERTIFICATE_REPORT_UPLOAD_LIMITS = {
  maxFiles: 20,
  maxImageBytes: 100 * 1024 * 1024,
  maxPdfBytes: 512 * 1024 * 1024,
  maxTotalBytes: 1024 * 1024 * 1024,
} as const

const CERTIFICATE_REPORT_IMAGE_EXTENSIONS = new Set(['.jpg', '.jpeg', '.png', '.webp'])

export type CertificateReportAssetType =
  (typeof CERTIFICATE_REPORT_ASSET_TYPE)[keyof typeof CERTIFICATE_REPORT_ASSET_TYPE]

export type CertificateReportFileKind = 'pdf' | 'image'

export function isCertificateReportMaterialType(materialType: string | null | undefined): boolean {
  return String(materialType || '').trim() === CERTIFICATE_REPORT_MATERIAL_TYPE
}

export function normalizeReportTitle(value: string | null | undefined): string | null {
  const normalized = typeof value === 'string' ? value.trim() : ''
  return normalized || null
}

export function getCertificateReportDisplayTitle(input: {
  productModel?: string | null
  reportTitle?: string | null
}): string {
  const productModel = String(input.productModel || '').trim()
  if (productModel) {
    return productModel
  }

  const reportTitle = String(input.reportTitle || '').trim()
  if (reportTitle) {
    return reportTitle
  }

  return '未命名报告'
}

export function getCertificateReportFileKindByAssetType(assetType: string | null | undefined): CertificateReportFileKind | null {
  if (assetType === CERTIFICATE_REPORT_ASSET_TYPE.PDF) {
    return 'pdf'
  }

  if (assetType === CERTIFICATE_REPORT_ASSET_TYPE.IMAGE) {
    return 'image'
  }

  return null
}

export function detectFileKindFromName(fileName: string | null | undefined): CertificateReportFileKind {
  const lowerName = String(fileName || '').trim().toLowerCase()
  if (lowerName.endsWith('.pdf')) {
    return 'pdf'
  }
  return 'image'
}

export function isSupportedCertificateReportFileName(fileName: string | null | undefined): boolean {
  const normalized = String(fileName || '').trim().toLowerCase()
  if (normalized.endsWith('.pdf')) {
    return true
  }

  const extensionIndex = normalized.lastIndexOf('.')
  const extension = extensionIndex >= 0 ? normalized.slice(extensionIndex) : ''
  return CERTIFICATE_REPORT_IMAGE_EXTENSIONS.has(extension)
}