/**
 * Data access layer for Easy Journey to Other Planets (EJ).
 *
 * Delegates to the generic book data layer which calls the BFF API.
 */

import {
  getBookMeta,
  getIntroSegments,
  getIntroSegment,
  getChapter,
  getContent,
  getSidebarItems,
  type BookMeta,
  type IntroSegment,
  type Chapter,
  type SidebarItem,
} from "@/lib/books";

const CODE = "ej";

// Re-export types with book-specific names for backwards compatibility
export type EjMeta = BookMeta;
export type EjChapterEntry = { number: number; title: string };
export type EjIntroSegment = IntroSegment;
export type EjChapter = Chapter;
export type EjSidebarItem = SidebarItem;

export async function getEjMeta(): Promise<EjMeta | null> {
  return getBookMeta(CODE);
}

export async function getEjIntroSegments(): Promise<EjIntroSegment[]> {
  return getIntroSegments(CODE);
}

export async function getEjIntroSegment(
  slug: string,
): Promise<EjIntroSegment | null> {
  return getIntroSegment(CODE, slug);
}

export async function getEjChapter(
  chapterNum: number,
): Promise<EjChapter | null> {
  return getChapter(CODE, String(chapterNum));
}

export async function getEjContent(
  slug: string,
): Promise<EjChapter | EjIntroSegment | null> {
  return getContent(CODE, slug);
}

export async function getEjSidebarItems(): Promise<EjSidebarItem[]> {
  return getSidebarItems(CODE);
}