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

datasource db {
  provider = "sqlite"
  url      = "file:./dev.db"
}

model User {
  id        String   @id @default(uuid())
  email     String   @unique
  name      String
  role      Role     @default(STUDENT)
  year      Int?
  faculty   String?
  balance   Float?
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  // Relationships
  enrollments Enrollment[]
  surveys     Survey[]
  chatSessions ChatSession[]
  advisorId   String?
  advisor     User?   @relation("AdvisorStudent", fields: [advisorId], references: [id])
  students    User[]  @relation("AdvisorStudent")

  @@map("users")
}

model Course {
  id          String   @id @default(uuid())
  code        String   @unique
  name        String
  description String?
  credits     Int
  semester    String
  schedule    String?
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  // Relationships
  enrollments Enrollment[]

  @@map("courses")
}

model Enrollment {
  id       String @id @default(uuid())
  userId   String
  courseId String
  grade    String?
  status   EnrollmentStatus @default(ENROLLED)

  // Relationships
  user   User   @relation(fields: [userId], references: [id])
  course Course @relation(fields: [courseId], references: [id])

  @@unique([userId, courseId])
  @@map("enrollments")
}

model FAQ {
  id        String   @id @default(uuid())
  question  String
  answer    String
  category  String
  language  String   @default("en")
  priority  Int      @default(1)
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@map("faqs")
}

model ChatSession {
  id        String   @id @default(uuid())
  userId    String?
  type      ChatType @default(GENERAL)
  messages  Json
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  // Relationships
  user User? @relation(fields: [userId], references: [id])

  @@map("chat_sessions")
}

model Survey {
  id        String   @id @default(uuid())
  userId    String?
  type      String
  rating    Int
  feedback  String?
  sessionId String?
  createdAt DateTime @default(now())

  // Relationships
  user User? @relation(fields: [userId], references: [id])

  @@map("surveys")
}

model AccessibilityAudit {
  id          String   @id @default(uuid())
  url         String
  imagePath   String?
  altText     String?
  wcagScore   Float?
  issues      Json?
  suggestions Json?
  createdAt   DateTime @default(now())

  @@map("accessibility_audits")
}

enum Role {
  STUDENT
  STAFF
  ADMIN
}

enum EnrollmentStatus {
  ENROLLED
  COMPLETED
  DROPPED
  PENDING
}

enum ChatType {
  GENERAL
  MENTAL_HEALTH
  ACADEMIC
  TECHNICAL
}