export const MAX_CHAT_IMAGES = 4;
export const MAX_CHAT_IMAGE_BYTES = 10 * 1024 * 1024;

export interface PendingChatImage {
  readonly file: File;
  readonly id: string;
  readonly previewUrl: string;
}

export interface ImageValidationResult {
  readonly accepted: boolean;
  readonly message?: string;
}

export const validateChatImage = (
  file: Pick<File, "size" | "type">
): ImageValidationResult => {
  if (!file.type.startsWith("image/")) {
    return { accepted: false, message: "Only image files can be attached" };
  }
  if (file.size > MAX_CHAT_IMAGE_BYTES) {
    return {
      accepted: false,
      message: "Images must be 10 MB or smaller",
    };
  }
  return { accepted: true };
};