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backend/prisma/schema.prisma

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+// This is your Prisma schema file,
+// learn more about it in the docs: https://pris.ly/d/prisma-schema
+
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "sqlite"
+  url      = env("DATABASE_URL")
+}
+
+model User {
+  id        String   @id @default(cuid())
+  username  String   @unique
+  password  String
+  firstName String?
+  lastName  String?
+  isActive  Boolean  @default(true)
+  isAdmin   Boolean  @default(false)
+  lastLoginAt DateTime?
+  loginAttempts Int @default(0)
+  lockedUntil DateTime?
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  // Relations
+  sessions Session[]
+  auditLogs AuditLog[]
+  accountAssignments AccountAssignment[]
+
+  @@map("users")
+}
+
+model WebsiteAccount {
+  id          String @id @default(cuid())
+  website     String
+  accountName String
+  token       String
+  isActive    Boolean @default(true)
+  maxUsers    Int @default(1)
+  currentUsers Int @default(0)
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+
+  // Relations
+  accountAssignments AccountAssignment[]
+
+  @@unique([website, accountName])
+  @@map("website_accounts")
+}
+
+model AccountAssignment {
+  id        String @id @default(cuid())
+  userId    String
+  accountId String
+  assignedAt DateTime @default(now())
+  expiresAt DateTime?
+  isActive  Boolean @default(true)
+
+  // Relations
+  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
+  account WebsiteAccount @relation(fields: [accountId], references: [id], onDelete: Cascade)
+
+  @@unique([userId, accountId])
+  @@map("account_assignments")
+}
+
+model Session {
+  id        String @id @default(cuid())
+  userId    String
+  token     String @unique
+  ipAddress String?
+  userAgent String?
+  expiresAt DateTime
+  createdAt DateTime @default(now())
+
+  // Relations
+  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
+
+  @@map("sessions")
+}
+
+model AuditLog {
+  id        String @id @default(cuid())
+  userId    String?
+  action    String
+  resource  String?
+  resourceId String?
+  details   String? // JSON string
+  ipAddress String?
+  userAgent String?
+  createdAt DateTime @default(now())
+
+  // Relations
+  user User? @relation(fields: [userId], references: [id], onDelete: SetNull)
+
+  @@map("audit_logs")
+}