import { isWorkOrderCompletionSurfaceReadOnly } from "@/domain/work-orders/utils/work-order-lock";

/** Backend RequestSizeLimit for media and completion-doc uploads. */
export const MAX_WORK_ORDER_MEDIA_BYTES = 50_000_000;

const MEDIA_MIME_TYPES = new Set([
  "image/jpeg",
  "image/jpg",
  "image/png",
  "video/mp4",
  "video/quicktime",
]);

const MEDIA_EXTENSIONS = new Set([".jpg", ".jpeg", ".png", ".mp4", ".mov"]);

const EXTRA_DOC_MIME_TYPES = new Set([
  ...MEDIA_MIME_TYPES,
  "application/pdf",
  "application/msword",
  "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
]);

const EXTRA_DOC_EXTENSIONS = new Set([...MEDIA_EXTENSIONS, ".pdf", ".doc", ".docx"]);

function fileExtension(file: File): string {
  const name = file.name.toLowerCase();
  const dot = name.lastIndexOf(".");
  return dot >= 0 ? name.slice(dot) : "";
}

function isTypeAllowed(file: File, mimes: Set<string>, extensions: Set<string>): boolean {
  const mimeOk = Boolean(file.type) && mimes.has(file.type.toLowerCase());
  const extOk = extensions.has(fileExtension(file));
  return mimeOk || extOk;
}

export function isWorkOrderFileTooLarge(
  file: File,
  maxBytes = MAX_WORK_ORDER_MEDIA_BYTES,
): boolean {
  return file.size > maxBytes;
}

export function isWorkOrderMediaTypeAllowed(file: File): boolean {
  return isTypeAllowed(file, MEDIA_MIME_TYPES, MEDIA_EXTENSIONS);
}

export function isWorkOrderExtraDocTypeAllowed(file: File): boolean {
  return isTypeAllowed(file, EXTRA_DOC_MIME_TYPES, EXTRA_DOC_EXTENSIONS);
}

export function workOrderMediaAcceptAttribute(): string {
  return "image/jpeg,image/jpg,image/png,video/mp4,video/quicktime,.jpg,.jpeg,.png,.mp4,.mov";
}

export function workOrderExtraDocsAcceptAttribute(): string {
  return `${workOrderMediaAcceptAttribute()},.pdf,.doc,.docx,application/pdf,application/msword,application/vnd.openxmlformats-officedocument.wordprocessingml.document`;
}

export function formatMediaSizeLimit(maxBytes = MAX_WORK_ORDER_MEDIA_BYTES): string {
  return `${Math.round(maxBytes / 1_000_000)} MB`;
}

/** Completion-doc / completion-media lock: Canceled or Completed. Extra Docs use canMutateWorkOrderExtraDocs. */
export function isWorkOrderDocumentsReadOnly(status: string | null | undefined): boolean {
  return isWorkOrderCompletionSurfaceReadOnly(status);
}

export function canDeleteWorkOrderMedia(media: {
  id: string | number;
  isLegacy?: boolean;
}): boolean {
  if (media.isLegacy) return false;
  const numericId = typeof media.id === "number" ? media.id : Number(media.id);
  return Number.isFinite(numericId) && numericId > 0;
}