/**
 * Data access layer for The Nectar of Instruction (NoI).
 *
 * Delegates to the generic book data layer (BFF API) for prose intro segments,
 * and to lib/api.ts for verse (text) lookups.
 *
 * NoI has 11 texts (verses) plus intro segments.
 * Verses are stored with: book "noi", division null, chapter = text number, verse = 1.
 */

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

const CODE = "noi";

// ---------------------------------------------------------------------------
// Re-export types with book-specific names for backwards compatibility
// ---------------------------------------------------------------------------

export type NoiMeta = BookMeta;
export type NoiIntroSegment = IntroSegment;
export type NoiChapter = Chapter;
export type NoiSidebarItem = SidebarItem;
export type NoiVerse = VerseRecord;

// ---------------------------------------------------------------------------
// Book meta
// ---------------------------------------------------------------------------

export async function getNoiMeta() {
  return getBookMeta(CODE);
}

// ---------------------------------------------------------------------------
// Intro segments
// ---------------------------------------------------------------------------

export async function getNoiIntroSegments() {
  return getIntroSegments(CODE);
}

export async function getNoiIntroSegment(slug: string) {
  return getIntroSegment(CODE, slug);
}

// ---------------------------------------------------------------------------
// Verses (texts 1-11, from verses collection via BFF)
// ---------------------------------------------------------------------------

export async function getNoiVerse(slug: string): Promise<NoiVerse | null> {
  const num = parseInt(slug, 10);
  if (isNaN(num)) return null;
  return getSingleVerse(CODE, null, num, 1);
}

// ---------------------------------------------------------------------------
// Unified content accessor
// ---------------------------------------------------------------------------

export async function getNoiContent(
  slug: string,
): Promise<NoiVerse | NoiIntroSegment | NoiChapter | null> {
  // Try as verse first (numeric slug)
  if (/^\d+$/.test(slug)) {
    const verse = await getNoiVerse(slug);
    if (verse) return verse;
  }
  // Fall back to prose content (intro segments, etc.)
  return getContent(CODE, slug);
}

// ---------------------------------------------------------------------------
// Sidebar navigation
// ---------------------------------------------------------------------------

export async function getNoiSidebarItems() {
  return getSidebarItems(CODE);
}