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

datasource db {
  provider = "postgresql"
}

enum UserRole {
  VENDOR
  SUPPLIER
  ADMIN
}

model User {
  id            String    @id @default(cuid())
  name          String?
  email         String?   @unique
  emailVerified DateTime?
  image         String?
  password      String?
  role          UserRole  @default(VENDOR)
  
  activeStoreId String?   // Track which store is currently active
  
  // MFA (Multi-Factor Authentication)
  mfaEnabled    Boolean   @default(false)
  mfaSecret     String?   // Encrypted TOTP secret
  
  chatPublicKey String?
  
  // Relations
  sentMessages     ChatMessage[] @relation("SentMessages")
  receivedMessages ChatMessage[] @relation("ReceivedMessages")
  accounts      Account[]
  sessions      Session[]
  stores        Store[]   // Changed from singular to support multiple stores
  supplierProfile SupplierProfile?
  notifications Notification[]
  gmailIntegration GmailIntegration?
  emailLogs     EmailLog[]
  
  createdAt     DateTime  @default(now())
  updatedAt     DateTime  @updatedAt
}

// Auth.js / NextAuth Prisma adapter models (required for OAuth e.g. Google)
model Account {
  id                String  @id @default(cuid())
  userId            String
  type              String
  provider          String
  providerAccountId String
  refresh_token     String?  @db.Text
  access_token      String?  @db.Text
  expires_at        Int?
  token_type        String?
  scope             String?
  id_token          String?  @db.Text
  session_state     String?

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

  @@unique([provider, providerAccountId])
}

model Session {
  id           String   @id @default(cuid())
  sessionToken String   @unique
  userId       String
  expires      DateTime

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

model VerificationToken {
  identifier String
  token      String
  expires    DateTime

  @@unique([identifier, token])
}

model Store {
  id               String   @id @default(cuid())
  userId           String   // Removed @unique to allow multiple stores per user
  user             User     @relation(fields: [userId], references: [id])
  
  businessName     String
  email            String
  timezone         String
  country          String
  
  // Shopify Credentials
  shopifyStoreName String
  shopifyDomain    String
  shopifyApiKey    String
  shopifyApiSecret String
  shopifyAccessToken String
  
  onboardingComplete Boolean @default(false)
  isActive         Boolean  @default(true)  // Track if this is the active store
  
  // Relations
  connections      Connection[]
  cachedProducts   CachedProduct[]
  cachedOrders     CachedOrder[]
  cachedCustomers  CachedCustomer[]
  syncMetadata     SyncMetadata[]
  invitations      Invitation[]
  productSyncs     ProductSync[]
  knowledgeDocuments KnowledgeDocument[]
  faqItems        FaqItem[]
  knowledgeChunks KnowledgeChunk[]
  emailLogs       EmailLog[]
  flaggedEmails   FlaggedEmail[]
  templates       Template[]
  
  createdAt        DateTime @default(now())
  updatedAt        DateTime @updatedAt
  
  @@index([userId])  // Add index for performance
}

model CachedProduct {
  id                String   @id @default(cuid())
  shopifyProductId  String
  storeId           String
  title             String
  vendor            String?
  productType       String?
  status            String?
  variants          Json     // Store variants as JSON
  images            Json     // Store images as JSON
  createdAt         DateTime @default(now())
  updatedAt         DateTime @updatedAt
  lastSyncedAt      DateTime @default(now())
  
  store             Store    @relation(fields: [storeId], references: [id], onDelete: Cascade)
  
  @@unique([shopifyProductId, storeId])
  @@index([storeId])
}

model CachedOrder {
  id                  String   @id @default(cuid())
  shopifyOrderId      String
  storeId             String
  orderNumber         String
  email               String?
  totalPrice          String
  currency            String?
  financialStatus     String?
  fulfillmentStatus   String?
  lineItems           Json     // Store line items as JSON
  customer            Json?    // Store customer info as JSON
  createdAt           DateTime @default(now())
  updatedAt           DateTime @updatedAt
  lastSyncedAt        DateTime @default(now())
  shopifyCreatedAt    DateTime?
  
  store               Store    @relation(fields: [storeId], references: [id], onDelete: Cascade)
  
  @@unique([shopifyOrderId, storeId])
  @@index([storeId])
  @@index([shopifyCreatedAt])
}

model CachedCustomer {
  id                String   @id @default(cuid())
  shopifyCustomerId String
  storeId           String
  email             String?
  firstName         String?
  lastName          String?
  ordersCount       Int      @default(0)
  totalSpent        String?
  phone             String?
  tags              String?
  createdAt         DateTime @default(now())
  updatedAt         DateTime @updatedAt
  lastSyncedAt      DateTime @default(now())
  shopifyCreatedAt  DateTime?
  
  store             Store    @relation(fields: [storeId], references: [id], onDelete: Cascade)
  
  @@unique([shopifyCustomerId, storeId])
  @@index([storeId])
}

model SyncMetadata {
  id            String   @id @default(cuid())
  storeId       String
  resourceType  String   // "products", "orders", "customers"
  lastSyncAt    DateTime @default(now())
  syncStatus    String   @default("success") // "success", "failed", "in_progress"
  recordCount   Int      @default(0)
  errorMessage  String?
  
  store         Store    @relation(fields: [storeId], references: [id], onDelete: Cascade)
  
  @@unique([storeId, resourceType])
  @@index([storeId])
}

model SupplierProfile {
  id           String   @id @default(cuid())
  userId       String   @unique
  user         User     @relation(fields: [userId], references: [id])
  
  companyName  String
  description  String?
  
  // Relations
  connections  Connection[]
  products     Product[]
  invitations  Invitation[]
  productSyncs ProductSync[]

  createdAt    DateTime @default(now())
  updatedAt    DateTime @updatedAt
}

model Connection {
  id         String   @id @default(cuid())
  storeId    String
  store      Store    @relation(fields: [storeId], references: [id])
  supplierId String
  supplier   SupplierProfile @relation(fields: [supplierId], references: [id])
  
  status     ConnectionStatus @default(PENDING)
  
  createdAt  DateTime @default(now())
  updatedAt  DateTime @updatedAt

  @@unique([storeId, supplierId])
}

model Invitation {
  id          String   @id @default(cuid())
  token       String   @unique
  storeId     String
  store       Store    @relation(fields: [storeId], references: [id])
  supplierId  String
  supplier    SupplierProfile @relation(fields: [supplierId], references: [id])
  
  email       String   // Supplier email to send invitation to
  expiresAt   DateTime
  used        Boolean  @default(false)
  
  createdAt   DateTime @default(now())
  usedAt      DateTime?

  @@index([token])
  @@index([supplierId])
  @@index([storeId])
}

enum ConnectionStatus {
  PENDING
  CONNECTED
  REJECTED
}

model Product {
  id          String   @id @default(cuid())
  supplierId  String
  supplier    SupplierProfile @relation(fields: [supplierId], references: [id])
  
  title       String
  description String?
  price       Float
  sku         String?
  imageUrl    String?
  
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt
}

enum ProductSyncStatus {
  PENDING
  ACCEPTED
  REJECTED
}

model ProductSync {
  id          String   @id @default(cuid())
  storeId     String
  store       Store    @relation(fields: [storeId], references: [id])
  supplierId  String
  supplier    SupplierProfile @relation(fields: [supplierId], references: [id])
  
  shopifyProductId String  // Shopify product ID from vendor's store
  shopifyProductTitle String
  shopifyProductData Json?  // Store full product data for reference
  
  status      ProductSyncStatus @default(PENDING)
  
  // Metadata
  requestedBy String  // userId of vendor who requested
  acceptedAt  DateTime?
  rejectedAt  DateTime?
  
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt
  
  @@unique([storeId, supplierId, shopifyProductId])
  @@index([storeId])
  @@index([supplierId])
  @@index([status])
  @@index([shopifyProductId])
}

model GmailIntegration {
  id            String   @id @default(cuid())
  userId        String   @unique
  user          User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  
  accessToken   String   @db.Text
  refreshToken  String?  @db.Text
  expiresAt     DateTime
  
  email         String   // Gmail email address
  scope         String   // OAuth scopes granted
  
  createdAt     DateTime @default(now())
  updatedAt     DateTime @updatedAt
  
  @@index([userId])
}

enum NotificationType {
  INVITATION_ACCEPTED
  INVITATION_RECEIVED
  CONNECTION_STATUS_CHANGED
  ORDER_RECEIVED
  PRODUCT_UPDATED
  PRODUCT_SYNC_REQUESTED
  PRODUCT_SYNC_ACCEPTED
  PRODUCT_SYNC_REJECTED
}

model Notification {
  id        String   @id @default(cuid())
  userId    String
  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  
  type      NotificationType
  title     String
  message   String
  read      Boolean  @default(false)
  readAt    DateTime?
  
  // Optional metadata for linking to related entities
  metadata  Json?    // Store related IDs (connectionId, invitationId, etc.)
  
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
  
  @@index([userId])
  @@index([userId, read])
  @@index([createdAt])
}

model EmailLog {
  id          String   @id @default(cuid())
  userId      String
  user        User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  storeId     String?
  store       Store?   @relation(fields: [storeId], references: [id])

  to          String
  subject     String
  bodyPreview String?

  // Whether this email was triggered automatically by the system
  isAutomated Boolean  @default(false)
  trigger     String?  // e.g. "GMAIL_AUTO_REPLY", "TICKET_CREATED"

  status      String   // "SENT" | "FAILED"
  providerMessageId String?
  errorMessage String?

  sentAt      DateTime @default(now())
  createdAt   DateTime @default(now())

  @@index([storeId, sentAt])
  @@index([userId, sentAt])
}

enum FlaggedEmailPriority {
  LOW
  MEDIUM
  HIGH
}

model FlaggedEmail {
  id         String              @id @default(cuid())
  storeId    String
  store      Store               @relation(fields: [storeId], references: [id], onDelete: Cascade)
  subject    String              @db.Text
  from       String              // Sender email
  reason     String              @db.Text
  priority   FlaggedEmailPriority @default(MEDIUM)
  messageId  String?             // Gmail message id for future sync
  flaggedAt  DateTime            @default(now())
  createdAt  DateTime            @default(now())

  @@index([storeId])
  @@index([storeId, flaggedAt])
}

enum KnowledgeDocumentStatus {
  UPLOADED
  PROCESSING
  READY
  FAILED
}

enum KnowledgeChunkSourceType {
  DOCUMENT
  FAQ
}

model KnowledgeDocument {
  id          String                  @id @default(cuid())
  storeId     String
  store       Store                   @relation(fields: [storeId], references: [id], onDelete: Cascade)

  title       String
  fileName    String
  mimeType    String
  sizeBytes   Int
  status      KnowledgeDocumentStatus @default(UPLOADED)
  errorMessage String?

  // Where the raw file is stored (local path or object storage key)
  storagePath String

  // Relations
  chunks      KnowledgeChunk[]

  createdAt   DateTime                @default(now())
  updatedAt   DateTime                @updatedAt

  @@index([storeId])
}

model FaqItem {
  id        String   @id @default(cuid())
  storeId   String
  store     Store    @relation(fields: [storeId], references: [id], onDelete: Cascade)

  question  String
  answer    String
  tags      Json?

  // Relations
  chunks    KnowledgeChunk[]

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@index([storeId])
}

model KnowledgeChunk {
  id          String                 @id @default(cuid())
  storeId     String
  store       Store                  @relation(fields: [storeId], references: [id], onDelete: Cascade)

  documentId  String?
  document    KnowledgeDocument?     @relation(fields: [documentId], references: [id])

  faqItemId   String?
  faqItem     FaqItem?               @relation(fields: [faqItemId], references: [id])

  sourceType  KnowledgeChunkSourceType
  content     String
  metadata    Json?

  // pgvector-backed column; accessed via raw SQL for similarity search
  embedding   Unsupported("vector")

  createdAt   DateTime               @default(now())
  updatedAt   DateTime               @updatedAt

  @@index([storeId])
  @@index([documentId])
  @@index([faqItemId])
}

model Template {
  id          String   @id @default(cuid())
  storeId     String
  store       Store   @relation(fields: [storeId], references: [id], onDelete: Cascade)

  name        String
  intent      String
  mood        String
  description String?

  body        String   // Template body (HTML or plain text with {{variables}})
  variables   Json?    // Optional metadata describing expected variables
  isHtml      Boolean  @default(true)

  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  @@index([storeId])
}

model ChatMessage {
  id                      String   @id @default(cuid())
  senderId                String
  receiverId              String
  encryptedContent        String   @db.Text
  encryptedKeyForSender   String   @db.Text
  encryptedKeyForReceiver String   @db.Text
  iv                      String

  sender   User @relation("SentMessages", fields: [senderId], references: [id])
  receiver User @relation("ReceivedMessages", fields: [receiverId], references: [id])

  createdAt DateTime @default(now())

  @@index([senderId, receiverId])
  @@index([receiverId, senderId])
}