generator client {
  provider = "prisma-client-js"
}

datasource db {
  provider = "mongodb"
  url      = env("DATABASE_URL")
}

// ---------------------------------------------------------------------------
// Synonym — embedded document inside Verse
// ---------------------------------------------------------------------------
type Synonym {
  word     String
  meanings String[]
}

// ---------------------------------------------------------------------------
// Verse — unified model for BG, SB, and CC verses
//
// book: "bg" | "sb" | "cc"
// division: null for BG, canto number string for SB ("1"-"10"),
//           līlā key for CC ("adi", "madhya", "antya")
// chapter: chapter number
// verse: verse number (first verse number for multi-verse entries)
// verseEnd: last verse number for multi-verse entries (e.g. 18 for "16-18")
// reference: display reference string (e.g. "Bg 1.1", "SB 1.1.1", "Cc Ādi 1.1")
// ---------------------------------------------------------------------------
model Verse {
  id              String    @id @default(auto()) @map("_id") @db.ObjectId
  book            String    // "bg" | "sb" | "cc"
  division        String?   // null for BG; canto for SB; lila for CC
  chapter         Int
  verse           Int
  verseEnd        Int?
  reference       String
  bookTitle       String
  devanagari      String
  bengali         String?   // only CC has Bengali
  transliteration String
  synonyms        Synonym[]
  translation     String
  purport         String[]

  @@unique([book, division, chapter, verse])
  @@index([book])
  @@index([book, division])
  @@index([book, division, chapter])
  @@map("verses")
}

// ---------------------------------------------------------------------------
// BookMeta — stores the intro.json data for each book
//
// The `data` field stores the entire intro JSON as a flexible JSON blob,
// since BG/SB/CC each have different structures (chapters vs cantos vs lilas).
// ---------------------------------------------------------------------------
model BookMeta {
  id   String @id @default(auto()) @map("_id") @db.ObjectId
  book String @unique // "bg" | "sb" | "cc"
  data Json

  @@map("book_meta")
}

// ---------------------------------------------------------------------------
// ProseChapter — for prose books like Kṛṣṇa Book (no verse structure)
//
// book: "kb"
// volume: volume number (1 or 2 for KB)
// chapter: chapter number within the volume
// title: chapter title
// type: "chapter" | "intro-segment"
// slug: URL-friendly identifier (e.g. "01", "preface", "words-from-apple")
// order: sort order (chapter number for chapters, custom for intro segments)
// paragraphs: array of HTML paragraph strings
// ---------------------------------------------------------------------------
model ProseChapter {
  id         String   @id @default(auto()) @map("_id") @db.ObjectId
  book       String   // "kb"
  volume     Int
  chapter    Int?     // null for intro segments
  title      String
  type       String   // "chapter" | "intro-segment"
  slug       String
  order      Int
  paragraphs String[]

  @@unique([book, volume, slug])
  @@index([book])
  @@index([book, volume])
  @@index([book, volume, type])
  @@map("prose_chapters")
}

// ---------------------------------------------------------------------------
// Essay — standalone essays (not part of any book's chapter structure)
//
// slug: URL-friendly identifier (e.g. "krishna-reservoir-of-pleasure")
// title: essay title
// author: author name
// year: publication year
// group: optional grouping key (e.g. "two-essays" for essays published together)
// order: sort order within a group
// paragraphs: array of HTML paragraph strings
// ---------------------------------------------------------------------------
model Essay {
  id         String   @id @default(auto()) @map("_id") @db.ObjectId
  slug       String   @unique
  title      String
  author     String
  year       Int?
  group      String?
  order      Int
  paragraphs String[]

  @@index([group])
  @@map("essays")
}

// ---------------------------------------------------------------------------
// GlossaryEntry — individual glossary term + definition
// ---------------------------------------------------------------------------
model GlossaryEntry {
  id             String @id @default(auto()) @map("_id") @db.ObjectId
  term           String
  definition     String
  definitionHtml String

  @@unique([term])
  @@map("glossary")
}