// prisma/schema.prisma
generator client {
  provider      = "prisma-client-js"
  binaryTargets = ["native", "debian-openssl-3.0.x"]
}

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

model User {
  id        String   @id @default(uuid())
  email     String   @unique
  createdAt DateTime @default(now())

  variableCategories VariableCategory[]
  fixedPlans         FixedPlan[]
  incomes            IncomeEvent[]
  allocations        Allocation[]
  transactions       Transaction[]
}

model VariableCategory {
  id           String  @id @default(uuid())
  userId       String
  user         User    @relation(fields: [userId], references: [id], onDelete: Cascade)
  name         String
  percent      Int
  priority     Int     @default(100)
  isSavings    Boolean @default(false)
  balanceCents BigInt  @default(0)

  @@unique([userId, name])
  @@index([userId, priority])
}

model FixedPlan {
  id           String   @id @default(uuid())
  userId       String
  user         User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  name         String
  cycleStart   DateTime
  dueOn        DateTime
  totalCents   BigInt
  fundedCents  BigInt   @default(0)
  priority     Int      @default(100)
  fundingMode  String   @default("auto-on-deposit")
  scheduleJson Json?

  @@unique([userId, name])
  @@index([userId, dueOn])
  @@index([userId, priority])
}

model IncomeEvent {
  id          String       @id @default(uuid())
  userId      String
  user        User         @relation(fields: [userId], references: [id], onDelete: Cascade)
  postedAt    DateTime
  amountCents BigInt
  allocations Allocation[]

  @@index([userId, postedAt])
}

model Allocation {
  id          String       @id @default(uuid())
  userId      String
  user        User         @relation(fields: [userId], references: [id], onDelete: Cascade)
  createdAt   DateTime     @default(now())
  kind        String
  toId        String
  amountCents BigInt
  incomeId    String?
  income      IncomeEvent? @relation(fields: [incomeId], references: [id])
}

model Transaction {
  id          String   @id @default(uuid())
  userId      String
  user        User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  occurredAt  DateTime
  kind        String
  categoryId  String?
  planId      String?
  amountCents BigInt

  @@index([userId, occurredAt])
}