generator client {
  provider = "prisma-client-js"
  output   = "../node_modules/.prisma/client"
}

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

enum Role {
  BOARD
  ORGA
  FINANCE
  MEMBER
}

enum ApprovalType {
  CHAIR_A
  CHAIR_B
  FINANCE
}

enum ApprovalStatus {
  PENDING
  APPROVED
}

enum ExpenseRecurrence {
  NONE
  MONTHLY
}

model User {
  id                  String         @id @default(cuid())
  name                String
  username            String         @unique
  email               String?        @unique
  passwordHash        String         @map("password_hash")
  role                Role
  approvalPreference  ApprovalType?  @map("approval_preference")
  approvalPermissions ApprovalType[] @default([]) @map("approval_permissions")
  workingGroupId      String?        @map("working_group_id")
  workingGroup        WorkingGroup?  @relation(fields: [workingGroupId], references: [id], onDelete: SetNull)
  createdExpenses     Expense[]      @relation("ExpenseCreator")
  approvals           Approval[]
  auditLogs           AuditLog[]
  pushSubscriptions   PushSubscription[]
  createdAt           DateTime       @default(now()) @map("created_at")
  updatedAt           DateTime       @updatedAt @map("updated_at")

  @@map("users")
}

model PushSubscription {
  id        String   @id @default(cuid())
  userId    String   @map("user_id")
  endpoint  String   @unique
  p256dh    String
  auth      String
  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  createdAt DateTime @default(now()) @map("created_at")
  updatedAt DateTime @updatedAt @map("updated_at")

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

model AccountingPeriod {
  id        String    @id @default(cuid())
  name      String    @unique
  startsAt  DateTime  @map("starts_at")
  endsAt    DateTime  @map("ends_at")
  isCurrent Boolean   @default(false) @map("is_current")
  budgets   Budget[]
  expenses  Expense[]
  createdAt DateTime  @default(now()) @map("created_at")
  updatedAt DateTime  @updatedAt @map("updated_at")

  @@map("accounting_periods")
}

model AppSettings {
  id                String   @id @default("global")
  approvalThreshold Decimal  @default(50) @db.Decimal(10, 2) @map("approval_threshold")
  createdAt         DateTime @default(now()) @map("created_at")
  updatedAt         DateTime @updatedAt @map("updated_at")

  @@map("app_settings")
}

model WorkingGroup {
  id        String    @id @default(cuid())
  name      String    @unique
  members   User[]
  budgets   Budget[]
  expenses  Expense[]
  createdAt DateTime  @default(now()) @map("created_at")
  updatedAt DateTime  @updatedAt @map("updated_at")

  @@map("working_groups")
}

model Budget {
  id             String           @id @default(cuid())
  name           String
  totalBudget    Decimal          @db.Decimal(10, 2) @map("total_budget")
  releasedAmount Decimal          @default(0) @db.Decimal(10, 2) @map("released_amount")
  colorCode      String           @map("color_code")
  workingGroupId String           @map("working_group_id")
  periodId       String           @map("period_id")
  workingGroup   WorkingGroup     @relation(fields: [workingGroupId], references: [id], onDelete: Cascade)
  period         AccountingPeriod @relation(fields: [periodId], references: [id], onDelete: Restrict)
  expenses       Expense[]
  createdAt      DateTime         @default(now()) @map("created_at")
  updatedAt      DateTime         @updatedAt @map("updated_at")

  @@unique([workingGroupId, periodId, name])
  @@map("budgets")
}

model Expense {
  id             String            @id @default(cuid())
  title          String
  description    String?
  amount         Decimal           @db.Decimal(10, 2)
  creatorId      String            @map("creator_id")
  agId           String            @map("ag_id")
  budgetId       String            @map("budget_id")
  periodId       String            @map("period_id")
  approvalStatus ApprovalStatus    @default(PENDING) @map("approval_status")
  recurrence     ExpenseRecurrence @default(NONE)
  recurrenceStartAt DateTime?         @map("recurrence_start_at")
  paidAt         DateTime?         @map("paid_at")
  documentedAt   DateTime?         @map("documented_at")
  proofUrl       String?           @map("proof_url")
  createdAt      DateTime          @default(now()) @map("created_at")
  updatedAt      DateTime          @updatedAt @map("updated_at")
  creator        User              @relation("ExpenseCreator", fields: [creatorId], references: [id], onDelete: Restrict)
  workingGroup   WorkingGroup      @relation(fields: [agId], references: [id], onDelete: Cascade)
  budget         Budget            @relation(fields: [budgetId], references: [id], onDelete: Restrict)
  period         AccountingPeriod  @relation(fields: [periodId], references: [id], onDelete: Restrict)
  approvals      Approval[]

  @@map("expenses")
}

model Approval {
  id           String       @id @default(cuid())
  expenseId    String       @map("expense_id")
  userId       String       @map("user_id")
  approvalType ApprovalType @map("approval_type")
  timestamp    DateTime     @default(now())
  expense      Expense      @relation(fields: [expenseId], references: [id], onDelete: Cascade)
  user         User         @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@unique([expenseId, approvalType])
  @@map("approvals")
}

model AuditLog {
  id          String   @id @default(cuid())
  actorId     String?  @map("actor_id")
  actor       User?    @relation(fields: [actorId], references: [id], onDelete: SetNull)
  action      String
  entityType  String   @map("entity_type")
  entityId    String?  @map("entity_id")
  entityLabel String?  @map("entity_label")
  summary     String
  metadata    Json?
  createdAt   DateTime @default(now()) @map("created_at")

  @@index([createdAt])
  @@map("audit_logs")
}