// SchwarmbLog – Prisma Schema
// Stack: Hono + Prisma + MySQL
// Conventions: camelCase in Prisma, snake_case in DB, cuid() for IDs

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

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

// ─────────────────────────────────────────────
// USERS & AUTH
// ─────────────────────────────────────────────

model User {
  id              String    @id @default(cuid())
  name            String
  email           String?   @unique
  role            Role      @default(STUDENT)

  // Auth
  passwordHash    String?
  qrToken         String?   @unique @map("qr_token")
  qrTokenCreated  DateTime? @map("qr_token_created")

  createdAt       DateTime  @default(now()) @map("created_at")
  updatedAt       DateTime  @updatedAt @map("updated_at")

  // Relations
  classMemberships  ClassMembership[]
  swarmMemberships  SwarmMembership[]
  blog              Blog?
  assignedTodos     Todo[]            @relation("AssignedTodos")
  reactions         Reaction[]
  comments          Comment[]

  @@map("users")
}

enum Role {
  ADMIN
  TEACHER
  STUDENT
  PARENT
}

// ─────────────────────────────────────────────
// CLASSES & SWARMS
// ─────────────────────────────────────────────

model Class {
  id          String   @id @default(cuid())
  name        String   // z.B. "7a"
  schoolYear  String   @map("school_year") // z.B. "2025/26"
  createdAt   DateTime @default(now()) @map("created_at")

  memberships ClassMembership[]
  swarms      Swarm[]
  blogs       Blog[]

  @@map("classes")
}

model ClassMembership {
  id        String          @id @default(cuid())
  user      User            @relation(fields: [userId], references: [id])
  userId    String          @map("user_id")
  class     Class           @relation(fields: [classId], references: [id])
  classId   String          @map("class_id")
  role      ClassRole       @default(STUDENT)

  @@unique([userId, classId])
  @@map("class_memberships")
}

enum ClassRole {
  TEACHER
  STUDENT
}

// Schwarm = Sichtbarkeitsgruppe (Klasse oder ganzer Jahrgang)
model Swarm {
  id        String      @id @default(cuid())
  name      String      // z.B. "Schwarm 7a" oder "Schwarm Jahrgang 7"
  scope     SwarmScope
  class     Class?      @relation(fields: [classId], references: [id])
  classId   String?     @map("class_id")
  createdAt DateTime    @default(now()) @map("created_at")

  memberships SwarmMembership[]

  @@map("swarms")
}

enum SwarmScope {
  CLASS   // nur eine Klasse
  YEAR    // ganzer Jahrgang
}

model SwarmMembership {
  id      String @id @default(cuid())
  swarm   Swarm  @relation(fields: [swarmId], references: [id])
  swarmId String @map("swarm_id")
  user    User   @relation(fields: [userId], references: [id])
  userId  String @map("user_id")

  @@unique([swarmId, userId])
  @@map("swarm_memberships")
}

// ─────────────────────────────────────────────
// STATIONEN & TEMPLATES
// ─────────────────────────────────────────────

model Station {
  id          String   @id @default(cuid())
  name        String   // z.B. "Lagos"
  country     String
  latitude    Float
  longitude   Float
  bneTopic    String   @map("bne_topic")  // z.B. "Elektroschrott"
  description String?  @db.Text
  orderIndex  Int      @map("order_index") // optimale Reihenfolge
  createdAt   DateTime @default(now()) @map("created_at")
  updatedAt   DateTime @updatedAt @map("updated_at")

  templates   EntryTemplate[]
  blogEntries BlogEntry[]

  @@map("stations")
}

// Vorstrukturierter Eintrag (Lückentext, Bildblock, etc.)
// blocks: JSON-Array von Block-Objekten
// Beispiel: [{ type: "gap_text", content: "Ich bin in ___ angekommen..." }, { type: "image" }, { type: "free_text" }]
model EntryTemplate {
  id          String   @id @default(cuid())
  station     Station  @relation(fields: [stationId], references: [id])
  stationId   String   @map("station_id")
  title       String
  blocks      Json     // Block-Struktur des Templates
  isOptional  Boolean  @default(false) @map("is_optional")
  orderIndex  Int      @default(0) @map("order_index")
  createdAt   DateTime @default(now()) @map("created_at")
  updatedAt   DateTime @updatedAt @map("updated_at")

  todos       Todo[]
  blogEntries BlogEntry[]

  @@map("entry_templates")
}

// ─────────────────────────────────────────────
// BLOG & EINTRÄGE
// ─────────────────────────────────────────────

model Blog {
  id        String   @id @default(cuid())
  student   User     @relation(fields: [studentId], references: [id])
  studentId String   @unique @map("student_id")
  class     Class    @relation(fields: [classId], references: [id])
  classId   String   @map("class_id")
  title     String   @default("Mein Reiseblog")
  createdAt DateTime @default(now()) @map("created_at")
  updatedAt DateTime @updatedAt @map("updated_at")

  entries   BlogEntry[]
  todos     Todo[]

  @@map("blogs")
}

model BlogEntry {
  id          String          @id @default(cuid())
  blog        Blog            @relation(fields: [blogId], references: [id])
  blogId      String          @map("blog_id")
  station     Station?        @relation(fields: [stationId], references: [id])
  stationId   String?         @map("station_id")
  template    EntryTemplate?  @relation(fields: [templateId], references: [id])
  templateId  String?         @map("template_id") // null = freier Eintrag
  title       String
  blocks      Json            // Ausgefüllte Block-Inhalte (Text, Bildpfad, etc.)
  status      EntryStatus     @default(DRAFT)
  visibility  Visibility      @default(PRIVATE)
  createdAt   DateTime        @default(now()) @map("created_at")
  updatedAt   DateTime        @updatedAt @map("updated_at")

  reactions   Reaction[]
  comments    Comment[]

  @@map("blog_entries")
}

enum EntryStatus {
  DRAFT
  PUBLISHED
}

enum Visibility {
  PRIVATE   // nur Schüler + Lehrkraft
  CLASS     // Klassen-Schwarm
  YEAR      // Jahrgangs-Schwarm
  PARENTS   // zusätzlich Eltern
}

// ─────────────────────────────────────────────
// TODOS
// ─────────────────────────────────────────────

// Lehrkraft weist Schüler einen vorstrukturierten Eintrag zu
model Todo {
  id           String        @id @default(cuid())
  blog         Blog          @relation(fields: [blogId], references: [id])
  blogId       String        @map("blog_id")
  template     EntryTemplate @relation(fields: [templateId], references: [id])
  templateId   String        @map("template_id")
  assignedBy   User          @relation("AssignedTodos", fields: [assignedById], references: [id])
  assignedById String        @map("assigned_by")
  dueDate      DateTime?     @map("due_date")
  completedAt  DateTime?     @map("completed_at")
  createdAt    DateTime      @default(now()) @map("created_at")

  @@map("todos")
}

// ─────────────────────────────────────────────
// SOZIALES
// ─────────────────────────────────────────────

model Reaction {
  id      String       @id @default(cuid())
  entry   BlogEntry    @relation(fields: [entryId], references: [id])
  entryId String       @map("entry_id")
  user    User         @relation(fields: [userId], references: [id])
  userId  String       @map("user_id")
  type    ReactionType @default(LIKE)

  @@unique([entryId, userId]) // pro Eintrag nur eine Reaktion pro User
  @@map("reactions")
}

enum ReactionType {
  LIKE
}

model Comment {
  id        String    @id @default(cuid())
  entry     BlogEntry @relation(fields: [entryId], references: [id])
  entryId   String    @map("entry_id")
  user      User      @relation(fields: [userId], references: [id])
  userId    String    @map("user_id")
  text      String    @db.Text
  createdAt DateTime  @default(now()) @map("created_at")
  updatedAt DateTime  @updatedAt @map("updated_at")

  @@map("comments")
}