import type { GetImageResult } from "astro";
import { getImage } from "astro:assets";
import type { FileObject } from "./types.js";

/**
 * Extract a plain string from a list of rich text items.
 *
 * @see https://developers.notion.com/reference/rich-text
 *
 * @example
 * richTextToPlainText(page.properties.Name.title)
 */
export function richTextToPlainText(
  data: ReadonlyArray<{ plain_text: string }>,
): string {
  return data.map((text) => text.plain_text).join("");
}

/**
 * Extract the URL from a file property.
 *
 * @see https://developers.notion.com/reference/file-object
 */
export function fileToUrl(file: FileObject): string;
export function fileToUrl(file: FileObject | null): string | undefined;
export function fileToUrl(file: FileObject | null): string | undefined {
  switch (file?.type) {
    case "external":
      return file.external.url;
    case "file":
      return file.file.url;
    default:
      return undefined;
  }
}

/**
 * Extract and locally cache the image from a file object.
 * @see https://developers.notion.com/reference/file-object
 */
export async function fileToImageAsset(
  file: FileObject,
): Promise<GetImageResult> {
  return getImage({
    src: fileToUrl(file),
    inferSize: true,
  });
}

/**
 * Replace date strings with date objects.
 *
 * @see https://developers.notion.com/reference/page-property-values#date
 */
export function dateToDateObjects(
  dateResponse: {
    start: string;
    end: string | null;
    time_zone: string | null;
  } | null,
) {
  if (dateResponse === null) {
    return null;
  }

  return {
    start: new Date(dateResponse.start),
    end: dateResponse.end ? new Date(dateResponse.end) : null,
    time_zone: dateResponse.time_zone,
  };
}