export type AllowedFileType =
  | 'pdf'
  | 'doc'
  | 'docx'
  | 'xls'
  | 'xlsx'
  | 'heic'
  | 'png'
  | 'jpg'
  | 'jpeg'
  | 'gif'
  | 'ppt'
  | 'pptx';

export interface FileUploaderConfig {
  /**
   * List of allowed file types that can be uploaded.
   */
  allowedFileTypes: AllowedFileType[];

  /**
   * Maximum number of files that can be uploaded.
   * Defaults: 10 if not specified. Maximum allowed value is 20.
   */
  maxNumberOfFiles?: number;

  /**
   * Per-file size limit in bytes.
   * Must be at least 100 bytes. Maximum allowed value is 10485760 (10 MB).
   */
  maxFileSize?: number;

  /**
   * Hint text displayed above the file uploader.
   */
  uploadHintText?: string;

  /**
   * Label for the button used to add files.
   * Defaults to "Add File" if not specified.
   */
  addFileButtonLabel?: string;
}

export const FILE_UPLOADER_ERROR_TRANSLATION_KEYS = {
  invalidExtension: 'fileUploaderErrorInvalidExtension',
  exceedsCount: 'fileUploaderErrorExceedsCount',
  belowMinSize: 'fileUploaderErrorBelowMinSize',
  exceedsMaxFileSize: 'fileUploaderErrorExceedsMaxFileSize',
  exceedsTotalSize: 'fileUploaderErrorExceedsTotalSize',
  nameTooLong: 'fileUploaderErrorNameTooLong',
  duplicate: 'fileUploaderErrorDuplicate',
  corrupted: 'fileUploaderErrorCorrupted',
  uploadFailed: 'fileUploaderErrorUploadFailed'
} as const;

export type FileUploaderErrorKey = keyof typeof FILE_UPLOADER_ERROR_TRANSLATION_KEYS;
export const FILE_UPLOADER_ERROR_KEYS = Object.keys(
  FILE_UPLOADER_ERROR_TRANSLATION_KEYS
) as FileUploaderErrorKey[];

export const FILE_UPLOADER_UI_TRANSLATION_KEYS = {
  addFileButtonLabel: 'fileUploaderAddFileButtonLabel',
  closeButtonLabel: 'fileUploaderCloseButtonLabel',
  maxFilesReachedLabel: 'fileUploaderMaxFilesReachedLabel'
} as const;

export type FileUploaderUiLabelKey = keyof typeof FILE_UPLOADER_UI_TRANSLATION_KEYS;
export const FILE_UPLOADER_UI_LABEL_KEYS = Object.keys(
  FILE_UPLOADER_UI_TRANSLATION_KEYS
) as FileUploaderUiLabelKey[];

/** Maximum combined size of all uploaded files in bytes (10 MB). */
export const MAX_TOTAL_SIZE_BYTES = 10 * 1024 * 1024;

export const MIN_FILE_SIZE_BYTES = 100;

export const MAX_FILE_NAME_LENGTH = 255;

export const MAX_FILE_COUNT = 20;

export const DEFAULT_MAX_FILE_COUNT = 10;

export const ALLOWED_FILE_TYPE_MIME_MAP: Record<AllowedFileType, string> = {
  pdf: 'application/pdf',
  doc: 'application/msword',
  docx: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
  xls: 'application/vnd.ms-excel',
  xlsx: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
  heic: 'image/heic',
  png: 'image/png',
  jpg: 'image/jpeg',
  jpeg: 'image/jpeg',
  gif: 'image/gif',
  ppt: 'application/vnd.ms-powerpoint',
  pptx: 'application/vnd.openxmlformats-officedocument.presentationml.presentation'
};