// Database schema for Personal Finances API

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

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

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

  assets         Asset[]
  liabilities    Liability[]
  snapshots      NetWorthSnapshot[]
  clients        Client[]
  invoices       Invoice[]
  incomeSources  IncomeSource[]
  expenses       Expense[]
  transactions   Transaction[]
  debtCategories DebtCategory[]

  @@map("users")
}

model Asset {
  id        String   @id @default(uuid())
  userId    String
  name      String
  type      AssetType
  value     Float
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  user User @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([userId])
  @@map("assets")
}

enum AssetType {
  CASH
  INVESTMENT
  PROPERTY
  VEHICLE
  OTHER
}

model Liability {
  id        String        @id @default(uuid())
  userId    String
  name      String
  type      LiabilityType
  balance   Float
  createdAt DateTime      @default(now())
  updatedAt DateTime      @updatedAt

  user User @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([userId])
  @@map("liabilities")
}

enum LiabilityType {
  CREDIT_CARD
  LOAN
  MORTGAGE
  OTHER
}

model NetWorthSnapshot {
  id               String   @id @default(uuid())
  userId           String
  date             DateTime
  totalAssets      Float
  totalLiabilities Float
  netWorth         Float
  createdAt        DateTime @default(now())

  user User @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([userId, date])
  @@map("net_worth_snapshots")
}

model Client {
  id        String   @id @default(uuid())
  userId    String
  name      String
  email     String
  phone     String?
  company   String?
  address   String?
  notes     String?
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  user     User      @relation(fields: [userId], references: [id], onDelete: Cascade)
  invoices Invoice[]

  @@index([userId])
  @@map("clients")
}

model Invoice {
  id            String        @id @default(uuid())
  userId        String
  clientId      String
  invoiceNumber String
  status        InvoiceStatus @default(DRAFT)
  issueDate     DateTime
  dueDate       DateTime
  subtotal      Float
  tax           Float         @default(0)
  total         Float
  notes         String?
  createdAt     DateTime      @default(now())
  updatedAt     DateTime      @updatedAt

  user      User              @relation(fields: [userId], references: [id], onDelete: Cascade)
  client    Client            @relation(fields: [clientId], references: [id], onDelete: Restrict)
  lineItems InvoiceLineItem[]

  @@unique([userId, invoiceNumber])
  @@index([userId, status])
  @@index([clientId])
  @@map("invoices")
}

enum InvoiceStatus {
  DRAFT
  SENT
  PAID
  OVERDUE
  CANCELLED
}

model InvoiceLineItem {
  id          String  @id @default(uuid())
  invoiceId   String
  description String
  quantity    Float
  unitPrice   Float
  total       Float

  invoice Invoice @relation(fields: [invoiceId], references: [id], onDelete: Cascade)

  @@index([invoiceId])
  @@map("invoice_line_items")
}

model IncomeSource {
  id        String   @id @default(uuid())
  userId    String
  name      String
  amount    Float
  frequency String
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  user User @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([userId])
  @@map("income_sources")
}

model Expense {
  id        String       @id @default(uuid())
  userId    String
  name      String
  amount    Float
  category  ExpenseCategory
  createdAt DateTime     @default(now())
  updatedAt DateTime     @updatedAt

  user User @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([userId])
  @@map("expenses")
}

enum ExpenseCategory {
  ESSENTIAL
  DISCRETIONARY
}

model Transaction {
  id          String   @id @default(uuid())
  userId      String
  description String
  amount      Float
  type        String
  date        DateTime
  createdAt   DateTime @default(now())

  user User @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([userId, date])
  @@map("transactions")
}

model DebtCategory {
  id        String   @id @default(uuid())
  userId    String
  name      String
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  user     User          @relation(fields: [userId], references: [id], onDelete: Cascade)
  accounts DebtAccount[]

  @@index([userId])
  @@map("debt_categories")
}

model DebtAccount {
  id             String   @id @default(uuid())
  categoryId     String
  name           String
  balance        Float
  interestRate   Float?
  minimumPayment Float?
  createdAt      DateTime @default(now())
  updatedAt      DateTime @updatedAt

  category DebtCategory  @relation(fields: [categoryId], references: [id], onDelete: Cascade)
  payments DebtPayment[]

  @@index([categoryId])
  @@map("debt_accounts")
}

model DebtPayment {
  id        String   @id @default(uuid())
  accountId String
  amount    Float
  date      DateTime
  createdAt DateTime @default(now())

  account DebtAccount @relation(fields: [accountId], references: [id], onDelete: Cascade)

  @@index([accountId, date])
  @@map("debt_payments")
}