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

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

enum UserRole {
  ADMIN
  TEACHER
  STUDENT
  GUEST
}

model User {
  id                 String       @id @default(cuid())
  email              String       @unique @db.VarChar(255)
  displayName        String?      @db.VarChar(255)
  hashedPassword     String       @default("")
  passwordSalt       String       @default("")
  role               UserRole     @default(GUEST)
  createdAt          DateTime     @default(now()) @db.Timestamptz
  updatedAt          DateTime     @updatedAt @db.Timestamptz
  organizedEvents    Event[]      @relation("OrganizedEvents")
  participatedEvents Event[]      @relation("ParticipatedEvents")
  createdQuestions   Question[]   @relation("CreatedQuestions")
  submissions        Submission[]
}

enum EventType {
  COMPETITION
  EXAM
  HOMEWORK
}

model Event {
  id             String          @id @default(cuid())
  name           String
  startTime      DateTime        @db.Timestamptz
  endTime        DateTime        @db.Timestamptz
  isVisible      Boolean         @default(true)
  type           EventType       @default(COMPETITION)
  createdAt      DateTime        @default(now()) @db.Timestamptz
  updatedAt      DateTime        @updatedAt @db.Timestamptz
  organizer      User[]          @relation("OrganizedEvents")
  participants   User[]          @relation("ParticipatedEvents")
  eventQuestions EventQuestion[]
}

enum QuestionDifficulty {
  EASY
  MEDIUM
  HARD
}

model Question {
  id             String             @id @default(cuid())
  name           String
  statement      String             @db.Text
  difficulty     QuestionDifficulty @default(EASY)
  createdAt      DateTime           @default(now()) @db.Timestamptz
  updatedAt      DateTime           @updatedAt @db.Timestamptz
  creators       User[]             @relation("CreatedQuestions")
  codeTemplates  CodeTemplate[]
  eventQuestions EventQuestion[]
  tags           QuestionTag[]      @relation("QuestionTags")
}

model QuestionTag {
  id        String     @id @default(cuid())
  name      String
  createdAt DateTime   @default(now()) @db.Timestamptz
  updatedAt DateTime   @updatedAt @db.Timestamptz
  questions Question[] @relation("QuestionTags")
}

enum CodeLanguage {
  C
  CPP
  JAVA
}

model CodeTemplate {
  id              String       @id @default(cuid())
  language        CodeLanguage
  starterCode     String       @db.Text
  correctSolution String       @default("") @db.Text
  createdAt       DateTime     @default(now()) @db.Timestamptz
  updatedAt       DateTime     @updatedAt @db.Timestamptz
  question        Question     @relation(fields: [questionId], references: [id])
  questionId      String
}

model EventQuestion {
  id           String       @id @default(cuid())
  event        Event        @relation(fields: [eventId], references: [id])
  eventId      String
  question     Question     @relation(fields: [questionId], references: [id])
  questionId   String
  displayOrder Int          @default(0)
  hidden       Boolean      @default(false)
  createdAt    DateTime     @default(now()) @db.Timestamptz
  updatedAt    DateTime     @updatedAt @db.Timestamptz
  submissions  Submission[]

  @@unique([eventId, questionId])
}

enum SubmissionStatus {
  PENDING
  ACCEPTED
  REJECTED
  COMPILATION_ERROR
  RUNTIME_ERROR
  INTERNAL_ERROR
  PARTIAL_ACCEPTED
  SKIPPED
}

model Submission {
  id              String           @id @default(cuid())
  submitter       User             @relation(fields: [submitterId], references: [id])
  submitterId     String           @db.VarChar(255)
  eventQuestion   EventQuestion    @relation(fields: [eventQuestionId], references: [id])
  eventQuestionId String           @db.VarChar(255)
  language        CodeLanguage
  code            String           @db.Text
  status          SubmissionStatus
  statusMessage   String?
  memoryUsage     Int?
  executionTime   Int?
  score           Int?             @default(0)
  createdAt       DateTime         @default(now()) @db.Timestamptz
  updatedAt       DateTime         @updatedAt @db.Timestamptz
  testResults     TestResult[]
}

enum TestResultStatus {
  ACCEPTED
  REJECTED
  TIMEOUT
  MEMORY_LIMIT_EXCEEDED
  COMPILATION_ERROR
  RUNTIME_ERROR
  INTERNAL_ERROR
  OUTPUT_MISMATCH
  SKIPPED
}

model TestResult {
  id            String           @id @default(cuid())
  submission    Submission       @relation(fields: [submissionId], references: [id])
  submissionId  String
  input         String           @db.Text
  output        String           @db.Text
  status        TestResultStatus
  statusMessage String?
  memoryUsage   Int?
  executionTime Int?
  score         Int?             @default(0)
  createdAt     DateTime         @default(now()) @db.Timestamptz
  updatedAt     DateTime         @updatedAt @db.Timestamptz
}