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

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

model Parent {
  id           String    @id @default(cuid())
  email        String    @unique
  name         String?
  emailVerified Boolean  @default(false)
  image        String?
  createdAt    DateTime  @default(now())
  updatedAt    DateTime  @updatedAt

  familyId String
  family   Family  @relation(fields: [familyId], references: [id])

  sessions Session[]
  accounts Account[]
}

model Session {
  id           String   @id @default(cuid())
  email        String?
  userId       String?
  parentId     String?
  parent       Parent?  @relation(fields: [parentId], references: [id])
  token        String   @unique
  expiresAt    DateTime
  ipAddress    String?
  userAgent    String?
  createdAt    DateTime @default(now())
  updatedAt    DateTime @updatedAt
}

model Account {
  id              String  @id @default(cuid())
  accountId       String
  providerId      String
  parentId        String
  parent          Parent  @relation(fields: [parentId], references: [id])
  accessToken     String?
  refreshToken    String?
  idToken         String?
  accessTokenExpiresAt DateTime?
  scope           String?
  password        String?
  createdAt       DateTime @default(now())
  updatedAt       DateTime @updatedAt
}

model Verification {
  id         String   @id @default(cuid())
  identifier String
  value      String
  expiresAt  DateTime
  createdAt  DateTime @default(now())
  updatedAt  DateTime @updatedAt
}

model Family {
  id        String   @id @default(cuid())
  name      String?
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  parents  Parent[]
  children Child[]
}

model Child {
  id            String   @id @default(cuid())
  name          String?
  avatar        String?
  birthdate     DateTime?
  profileNotes  String?
  createdAt     DateTime @default(now())
  updatedAt     DateTime @updatedAt

  familyId String
  family   Family @relation(fields: [familyId], references: [id])

  devices     Device[]
  sessions    SessionLog[]
  fsrsCards   FsrsCard[]
  milestones  Milestone[]
}

model Device {
  id                String   @id @default(cuid())
  deviceFingerprint String
  pairedAt          DateTime @default(now())
  lastSeen          DateTime @updatedAt
  role              String   @default("child")
  createdAt         DateTime @default(now())

  childId String
  child   Child @relation(fields: [childId], references: [id])
}

model SessionLog {
  id             String   @id @default(cuid())
  startedAt      DateTime @default(now())
  endedAt        DateTime?
  durationSec    Int?
  skillsPracticed String?

  childId String
  child   Child @relation(fields: [childId], references: [id])

  skillAttempts SkillAttempt[]
}

model SkillAttempt {
  id          String   @id @default(cuid())
  skillCode   String
  promptLevel Int      @default(0)
  correct     Boolean
  responseMs  Int?
  createdAt   DateTime @default(now())

  sessionLogId String
  sessionLog   SessionLog @relation(fields: [sessionLogId], references: [id])
}

model FsrsCard {
  id         String   @id @default(cuid())
  skillCode  String
  dueAt      DateTime @default(now())
  stability  Float    @default(0)
  difficulty Float    @default(0)
  reps       Int      @default(0)
  lapses     Int      @default(0)
  createdAt  DateTime @default(now())
  updatedAt  DateTime @updatedAt

  childId String
  child   Child @relation(fields: [childId], references: [id])
}

model Milestone {
  id        String   @id @default(cuid())
  skillCode String
  reachedAt DateTime @default(now())

  childId String
  child   Child @relation(fields: [childId], references: [id])
}