generator client {
  provider = "prisma-client"
  output   = "../src/generated/prisma"
}

datasource db {
  provider = "postgresql"
}

model User {
  id           String       @id @default(cuid())
  email        String       @unique
  passwordHash String
  createdAt    DateTime     @default(now())
  updatedAt    DateTime     @updatedAt
  accounts     Account[]
  budgets      Budget[]
  budgetRules  BudgetRule[]
}

enum AccountType {
  BANK
  CREDIT_CARD
  INVESTMENT
}

model Account {
  id                  String        @id @default(cuid())
  userId              String
  user                User          @relation(fields: [userId], references: [id], onDelete: Cascade)
  name                String
  institution         String?
  type                AccountType
  currency            String        @default("USD")
  currentBalanceCents Int           @default(0)
  isActive            Boolean       @default(true)
  createdAt           DateTime      @default(now())
  updatedAt           DateTime      @updatedAt
  transactions        Transaction[]
  uploads             CsvUpload[]

  @@index([userId])
}

enum TransactionType {
  DEBIT
  CREDIT
}

model Transaction {
  id          String          @id @default(cuid())
  accountId   String
  account     Account         @relation(fields: [accountId], references: [id], onDelete: Cascade)
  uploadId    String?
  upload      CsvUpload?      @relation(fields: [uploadId], references: [id])
  budgetId    String?
  budget      Budget?         @relation(fields: [budgetId], references: [id], onDelete: SetNull)
  date        DateTime
  description String
  amountCents Int
  type        TransactionType
  category    String?
  notes       String?
  dedupeHash  String
  createdAt   DateTime        @default(now())
  updatedAt   DateTime        @updatedAt

  @@unique([dedupeHash])
  @@index([accountId, date])
  @@index([date])
  @@index([budgetId])
}

model Budget {
  id           String        @id @default(cuid())
  userId       String
  user         User          @relation(fields: [userId], references: [id], onDelete: Cascade)
  name         String
  limitCents   Int?
  color        String?
  isActive     Boolean       @default(true)
  createdAt    DateTime      @default(now())
  updatedAt    DateTime      @updatedAt
  transactions Transaction[]
  rules        BudgetRule[]

  @@index([userId])
}

model BudgetRule {
  id        String   @id @default(cuid())
  userId    String
  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  budgetId  String
  budget    Budget   @relation(fields: [budgetId], references: [id], onDelete: Cascade)
  pattern   String
  createdAt DateTime @default(now())

  @@index([userId])
  @@index([budgetId])
}

model CsvUpload {
  id            String        @id @default(cuid())
  accountId     String
  account       Account       @relation(fields: [accountId], references: [id], onDelete: Cascade)
  fileName      String
  rowCount      Int
  importedCount Int
  skippedCount  Int
  status        String
  errorMessage  String?
  uploadedAt    DateTime      @default(now())
  transactions  Transaction[]

  @@index([accountId])
}

model BalanceSnapshot {
  id           String   @id @default(cuid())
  accountId    String
  year         Int
  month        Int
  balanceCents Int
  computedAt   DateTime @default(now())

  @@unique([accountId, year, month])
  @@index([year, month])
}