// Gold Banking System — core schema
// Canonical accounting model: legacy "System A" gram ledger (see migration notes).
// The external "Tahesab" service is retired — LedgerEntry is the sole source of truth.
// All money/weight fields use Decimal, never Float, to avoid rounding drift in debt math.

generator client {
  provider = "prisma-client-js"
  // native = local Windows/macOS; debian-openssl-3.0.x = node:20-bookworm-slim (Arvan)
  binaryTargets = ["native", "debian-openssl-3.0.x"]
}

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

// ─────────────────────────────────────────────────────────────────────────
// Enums
// ─────────────────────────────────────────────────────────────────────────

enum AdminRole {
  SUPER_ADMIN
  SYSTEM_APPROVER // legacy: تایید مدیر سیستم
  SALES_EXPERT // legacy Customer.type=1, also acts as a referral "reagent"
  WORKSHOP_SUPERVISOR
  ACCOUNTANT
}

/// Legacy Customer.type — what kind of wholesale customer this is. Values and
/// labels taken verbatim from bulkCustomer.vue's userTypes list.
enum CustomerKind {
  SALES_AGENT // 1 کارشناس فروش
  APP_SHOPKEEPER // 2 مغازه دار اپلیکیشن
  WALK_IN_SHOPKEEPER // 3 مغازه دار حضوری
  BANKER // 4 بنکدار
  WORKSHOP_SUPERVISOR // 5 سرپرست کارگاه
}

enum VerificationStep {
  UNVERIFIED
  STEP_ONE_SUBMITTED
  STEP_TWO_SUBMITTED
  VERIFIED
}

/// Legacy kept retail and wholesale orders in two SEPARATE tables
/// (orders_orders vs orders). The redesigned schema has one Order model, so the
/// distinction lives here instead.
enum OrderChannel {
  RETAIL // تک فروشی
  WHOLESALE // عمده فروشی
}

enum OrderStatus {
  SUSPENDED // credit limit (goldCreditLimitGrams) exceeded at placement
  PLACED
  ADMIN_APPROVED
  SOURCING
  PREPARING
  DELIVERED_TO_AGENT
  DELIVERED_TO_CUSTOMER // debt recognition point — mirrors legacy sts>4
  CANCELLED
}

enum PreOrderStatus {
  PLACED
  ADMIN_APPROVED
  WORKSHOP_APPROVED
  READY_TO_SHIP
  DELIVERED
  CANCELLED
}

enum LedgerCurrency {
  GOLD_GRAM
  RIAL
}

enum LedgerDirection {
  DEBIT // increases what the customer owes
  CREDIT // decreases what the customer owes
}

enum LedgerSourceType {
  ORDER_STOCK
  ORDER_PRE_ORDER
  REPAYMENT_MELTED_GOLD // karat-normalized: amount * karatPerMille / 750
  REPAYMENT_TRANSFER
  REPAYMENT_CHEQUE
  REPAYMENT_CASH // price-per-gram-normalized via pricePerGramRialAtEntry
  WALLET_BONUS
  ADJUSTMENT
}

// ─────────────────────────────────────────────────────────────────────────
// Identity
// ─────────────────────────────────────────────────────────────────────────

model City {
  id         String            @id @default(cuid())
  name       String
  province   String?
  /// Legacy cities.percent / percent_aux — per-city wage surcharges the city
  /// screen edits through GET cities/get-percent/{id} and get-percent-aux/{id}.
  percent    Decimal?          @db.Decimal(6, 3)
  percentAux Decimal?          @db.Decimal(6, 3)
  customers  Customer[]
  addresses  CustomerAddress[]
  branches   Branch[]
  preOrders  PreOrder[]
}

model AdminUser {
  id           String    @id @default(cuid())
  fullName     String
  mobile       String    @unique
  passwordHash String
  role         AdminRole
  /// Legacy `users.ut`. Granular ACL lives here (Permission rows hang off UserType);
  /// the coarse `role` enum above is retained for the business rules that already
  /// switch on it. Nullable so existing seeded admins remain valid.
  userTypeId   Int?
  userType     UserType? @relation(fields: [userTypeId], references: [id])
  branchId     String?
  branch       Branch?   @relation(fields: [branchId], references: [id])
  wagePercent  Decimal?  @db.Decimal(6, 3) // legacy Customer.percent, commission on referred orders
  isActive     Boolean   @default(true)
  createdAt    DateTime  @default(now())

  referredCustomers    Customer[]            @relation("ReferralAgent")
  supervisedWorkshops  Workshop[]            @relation("WorkshopSupervisor")
  branchAllocations    BranchAllocation[]    @relation("AllocationAuthor")
  postedLedgerEntries  LedgerEntry[]
  orderStatusEvents    OrderStatusEvent[]
  preOrderStatusEvents PreOrderStatusEvent[]
  sentSmsMessages      SmsMessage[]          @relation("SmsAuthor")
  sentNotifications    Notification[]        @relation("NotificationAuthor")
  uploadedFiles        UploadedFile[]        @relation("FileUploader")

  @@index([role])
  @@index([userTypeId])
}

model Customer {
  id           String  @id @default(cuid())
  fullName     String
  mobile       String  @unique
  nationalCode String  @unique
  passwordHash String
  cityId       String?
  city         City?   @relation(fields: [cityId], references: [id])

  /// Legacy Customer.type — distinguishes بنکدار from مغازه دار, which the
  /// BankerList / ShopkeeperList screens filter on.
  kind CustomerKind @default(APP_SHOPKEEPER)

  /// Legacy contact + shop columns, shown on the wholesale customer form and as
  /// (hidden-by-default) columns in its grid.
  phone      String?
  address    String?
  storeName  String?
  pasazhName String?
  zone       String?
  /// Legacy mcode — the operator-assigned customer code.
  memberCode String?

  referredByAgentId String?
  referredByAgent   AdminUser? @relation("ReferralAgent", fields: [referredByAgentId], references: [id])

  // Credit limit + cached ledger balances (source of truth is LedgerEntry; these
  // are denormalized for fast reads and reconciled by a scheduled job).
  goldCreditLimitGrams Decimal @default(0) @db.Decimal(14, 4) // legacy gram_level
  goldDebtGrams        Decimal @default(0) @db.Decimal(14, 4) // legacy remain
  fiatDebtRial         Decimal @default(0) @db.Decimal(20, 2) // legacy rial_remain

  verificationStep   VerificationStep @default(UNVERIFIED)
  nationalIdImageUrl String?
  businessLicenseUrl String?
  shopImageUrl       String?

  /// Legacy `image_id` — the profile photo (عکس پروفایل) on the sales-agent
  /// form. Legacy stored an FK to its Image table and read it back as a nested
  /// `image: { id, image }`, so this is a relation, not a bare URL string.
  avatarFileId String?
  avatarFile   UploadedFile? @relation("CustomerAvatar", fields: [avatarFileId], references: [id])

  /// Legacy had TWO independent switches on a customer:
  ///   sts    -> may they place orders    (this field)
  ///   active -> is the account enabled   (isActive, below)
  /// The port previously drove both from isActive; they are separate again.
  canPlaceOrders Boolean @default(true)

  isActive   Boolean  @default(true)
  /// Legacy archive flag — the archived list filtered on this, not on isActive.
  isArchived Boolean  @default(false)
  createdAt  DateTime @default(now())
  updatedAt  DateTime @updatedAt

  addresses     CustomerAddress[]
  orders        Order[]
  preOrders     PreOrder[]
  ledgerEntries LedgerEntry[]
  walletBonuses WalletBonus[]
  comments      Comment[]
  promotions    Promotion[]
  notifications NotificationRecipient[]
  activityLogs  CustomerActivityLog[]

  @@index([referredByAgentId])
}

model CustomerAddress {
  id          String   @id @default(cuid())
  customerId  String
  customer    Customer @relation(fields: [customerId], references: [id])
  cityId      String?
  city        City?    @relation(fields: [cityId], references: [id])
  addressLine String
  isDefault   Boolean  @default(false)
}

model Branch {
  id          String             @id @default(cuid())
  name        String
  /// Legacy Branch.address / phone — both are columns in the branch grid.
  address     String?
  phone       String?
  /// Legacy GET branch/active/{id} toggles this.
  isActive    Boolean            @default(true)
  cityId      String?
  city        City?              @relation(fields: [cityId], references: [id])
  adminUsers  AdminUser[]
  orders      Order[]
  allocations BranchAllocation[]
}

model Workshop {
  id           String     @id @default(cuid())
  name         String
  /// Legacy Workshop.address / phone — both are columns in the workshop grid.
  address      String?
  phone        String?
  /// The supervisor created alongside the workshop by the legacy Add form.
  supervisorId String?
  supervisor   AdminUser? @relation("WorkshopSupervisor", fields: [supervisorId], references: [id])
  isActive     Boolean    @default(true)
  preOrders    PreOrder[]
}

// ─────────────────────────────────────────────────────────────────────────
// Catalog — item reference catalog
// ─────────────────────────────────────────────────────────────────────────

model Category {
  id          String      @id @default(cuid())
  title       String
  /// Legacy Category.type — which storefront the category belongs to:
  /// 1 سایت | 2 اپلیکشن موبایل. Drives the "type_str" grid column.
  type        Int         @default(1)
  /// Legacy Category.image / icon — the grid renders the image, the storefront the icon.
  imageUrl    String?
  iconUrl     String?
  /// Legacy meta tag + description, used for SEO on the site categories.
  metaTag     String?
  description String?
  parentId    String?
  parent      Category?   @relation("CategoryTree", fields: [parentId], references: [id])
  children    Category[]  @relation("CategoryTree")
  products    Product[]
  promotions  Promotion[]
}

model Brand {
  id         String      @id @default(cuid())
  title      String
  products   Product[]
  promotions Promotion[]
}

/// Curated product groupings — replaces legacy "Ciny/CinyProduct" (a tagging
/// feature, NOT a gold-price snapshot mechanism, despite the misleading legacy name).
model Collection {
  id          String              @id @default(cuid())
  title       String
  description String?
  isActive    Boolean             @default(true)
  products    CollectionProduct[]
}

model CollectionProduct {
  collectionId String
  collection   Collection @relation(fields: [collectionId], references: [id])
  productId    String
  product      Product    @relation(fields: [productId], references: [id])

  @@id([collectionId, productId])
}

model Product {
  id          String    @id @default(cuid())
  title       String
  description String?
  categoryId  String?
  category    Category? @relation(fields: [categoryId], references: [id])
  brandId     String?
  brand       Brand?    @relation(fields: [brandId], references: [id])
  /// Legacy Product.product_code — the human-facing SKU shown in the grid.
  productCode String?   @unique
  /// Legacy Product.show_type: 1 site, 2 mobile, 3 both.
  showType    Int       @default(3)
  isActive    Boolean   @default(true)
  createdAt   DateTime  @default(now())

  variants        ProductVariant[]
  images          ProductImage[]
  collections     CollectionProduct[]
  comments        Comment[]
  promotions      Promotion[]
  allocationItems BranchAllocationItem[]
}

model ProductImage {
  id        String  @id @default(cuid())
  productId String
  product   Product @relation(fields: [productId], references: [id])
  url       String
  sortOrder Int     @default(0)
}

model ProductVariant {
  id                 String  @id @default(cuid())
  productId          String
  product            Product @relation(fields: [productId], references: [id])
  title              String
  sku                String? @unique
  /// Base/raw weight before making charge ("rash weight").
  rashWeightGrams    Decimal @db.Decimal(14, 4)
  /// Default making-charge percentage applied on top of rash weight.
  defaultWagePercent Decimal @db.Decimal(6, 3)
  /// Legacy ProductVariant.qty — on-hand stock. The cart refuses a variant with
  /// qty 0 unless it is flagged pre-order, so both fields are required for that
  /// guard to work (see apps/admin-panel/src/stores/cart.ts).
  qty                Int     @default(0)
  /// Legacy is_pre_order: orderable even at zero stock.
  isPreOrder         Boolean @default(false)
  isActive           Boolean @default(true)

  orderItems OrderItem[]
}

// ─────────────────────────────────────────────────────────────────────────
// Orders — stock orders (debt-bearing)
// ─────────────────────────────────────────────────────────────────────────

model Order {
  id          String       @id @default(cuid())
  orderNumber String       @unique
  customerId  String
  customer    Customer     @relation(fields: [customerId], references: [id])
  branchId    String?
  branch      Branch?      @relation(fields: [branchId], references: [id])
  /// Which sales channel placed this order — see OrderChannel.
  channel     OrderChannel @default(RETAIL)
  status      OrderStatus  @default(PLACED)

  /// Total gold weight incl. wage across all items ("allGram" / order.w).
  totalGoldWeightGrams Decimal @db.Decimal(14, 4)
  /// Pure making-charge weight component (totalGoldWeightGrams minus raw weight sum).
  wageWeightGrams      Decimal @db.Decimal(14, 4)
  /// Flat Rial charge independent of gold price (e.g. stones) — legacy rial_input.
  flatRialCharge       Decimal @default(0) @db.Decimal(20, 2)

  isSuspendedOverCreditLimit Boolean   @default(false)
  deliveredAt                DateTime? // setting this is what triggers debt recognition

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

  items                 OrderItem[]
  statusEvents          OrderStatusEvent[]
  ledgerEntries         LedgerEntry[]
  convertedFromPreOrder PreOrder?

  @@index([customerId])
  @@index([status])
}

model OrderItem {
  id               String         @id @default(cuid())
  orderId          String
  order            Order          @relation(fields: [orderId], references: [id])
  productVariantId String
  productVariant   ProductVariant @relation(fields: [productVariantId], references: [id])
  quantity         Int

  // Snapshots at order time — never re-read from ProductVariant after placement.
  rashWeightGramsSnapshot Decimal @db.Decimal(14, 4)
  wagePercentSnapshot     Decimal @db.Decimal(6, 3)
  discountPercentSnapshot Decimal @default(0) @db.Decimal(6, 3)
  /// computed: rash*(1 + (wagePercent-discount)/100)
  computedWeightGrams     Decimal @db.Decimal(14, 4)
  flatRialCharge          Decimal @default(0) @db.Decimal(20, 2)
}

model OrderStatusEvent {
  id               String       @id @default(cuid())
  orderId          String
  order            Order        @relation(fields: [orderId], references: [id])
  fromStatus       OrderStatus?
  toStatus         OrderStatus
  note             String?
  actorAdminUserId String?
  actorAdminUser   AdminUser?   @relation(fields: [actorAdminUserId], references: [id])
  createdAt        DateTime     @default(now())

  @@index([orderId])
}

// ─────────────────────────────────────────────────────────────────────────
// Pre-orders — custom manufacturing requests (not debt-bearing until converted)
// ─────────────────────────────────────────────────────────────────────────

model PreOrder {
  id         String         @id @default(cuid())
  customerId String
  customer   Customer       @relation(fields: [customerId], references: [id])
  cityId     String?
  city       City?          @relation(fields: [cityId], references: [id])
  workshopId String?
  workshop   Workshop?      @relation(fields: [workshopId], references: [id])
  status     PreOrderStatus @default(PLACED)

  designImageUrl       String?
  colorName            String?
  sizeSpec             String?
  stoneColor           String?
  minaColor            String?
  estimatedWeightGrams Decimal? @db.Decimal(14, 4)
  estimatedPriceRial   Decimal? @db.Decimal(20, 2)
  description          String?

  /// Once priced, an admin converts this into a real (debt-bearing) Order.
  convertedOrderId String? @unique
  convertedOrder   Order?  @relation(fields: [convertedOrderId], references: [id])

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

  statusEvents PreOrderStatusEvent[]

  @@index([customerId])
}

model PreOrderStatusEvent {
  id               String     @id @default(cuid())
  preOrderId       String
  preOrder         PreOrder   @relation(fields: [preOrderId], references: [id])
  /// Field-level diff, e.g. {"status": {"old": "PLACED", "new": "ADMIN_APPROVED"}}
  changes          Json
  actorAdminUserId String?
  actorAdminUser   AdminUser? @relation(fields: [actorAdminUserId], references: [id])
  ipAddress        String?
  createdAt        DateTime   @default(now())

  @@index([preOrderId])
}

// ─────────────────────────────────────────────────────────────────────────
// Accounting — the dual-currency ledger (core of the system)
// ─────────────────────────────────────────────────────────────────────────

model LedgerEntry {
  id         String   @id @default(cuid())
  customerId String
  customer   Customer @relation(fields: [customerId], references: [id])

  currency   LedgerCurrency
  direction  LedgerDirection
  sourceType LedgerSourceType
  /// Always positive; direction determines the sign applied to the customer balance.
  amount     Decimal          @db.Decimal(20, 4)

  /// Purity of the physical instrument, for REPAYMENT_MELTED_GOLD (e.g. 750, 916).
  karatPerMille           Int?
  /// Gold price/gram at conversion time, for REPAYMENT_CASH.
  pricePerGramRialAtEntry Decimal? @db.Decimal(20, 2)

  orderId String?
  order   Order?  @relation(fields: [orderId], references: [id])

  /// Pending entries don't count toward the cached customer balance until confirmed.
  confirmed           Boolean    @default(false)
  confirmedAt         DateTime?
  postedByAdminUserId String?
  postedByAdminUser   AdminUser? @relation(fields: [postedByAdminUserId], references: [id])

  /// Instrument metadata from the legacy "cash" document form. Which fields are
  /// filled depends on sourceType: a melted-gold receipt carries lab/hallmark and
  /// the pre-normalization weight, a cheque carries the account and bank, and a
  /// transfer carries its destination.
  /// Legacy columns: lab, ang, account_name, bank_name, to, original_value, recive_date.
  labName       String?
  hallmark      String?
  accountName   String?
  bankName      String?
  transferTo    String?
  /// Weight as handed over, BEFORE karat normalization (legacy original_value).
  originalValue Decimal?  @db.Decimal(14, 4)
  /// Rial amount for cash/cheque documents (legacy price).
  priceRial     Decimal?  @db.Decimal(20, 2)
  receivedAt    DateTime?

  note      String?
  createdAt DateTime @default(now())

  @@index([customerId, currency])
  @@index([orderId])
}

/// Replaces legacy WebServiceGold / ConfigStatic.gold_price — timestamped price feed.
model GoldPriceQuote {
  id               String   @id @default(cuid())
  karatPerMille    Int
  pricePerGramRial Decimal  @db.Decimal(20, 2)
  source           String
  quotedAt         DateTime @default(now())

  @@index([karatPerMille, quotedAt])
}

/// Time-limited gold cashback bonus — replaces the legacy Rooyesh\Wallet gold credit.
model WalletBonus {
  id         String    @id @default(cuid())
  customerId String
  customer   Customer  @relation(fields: [customerId], references: [id])
  orderId    String?
  goldGrams  Decimal   @db.Decimal(14, 4)
  grantedAt  DateTime  @default(now())
  expiresAt  DateTime
  consumedAt DateTime?
  isActive   Boolean   @default(true)

  @@index([customerId, isActive])
}

// ─────────────────────────────────────────────────────────────────────────
// Admin ACL — faithful port of the legacy granular permission model.
//
// Legacy (henza_server):
//   Schema::create('permission', function (Blueprint $table) {
//       $table->string('rid');
//       $table->integer('ut');
//       $table->primary(['rid' , 'ut']);
//   });
//
// Permissions attach to the USER TYPE (`ut`), never to an individual user, so
// every admin of a given type shares one permission set. `ut` pointed at a row
// in the legacy `config_static` lookup table; UserType is that table, narrowed
// to the admin-user-type rows it was actually used for.
//
// A `rid` is a dotted permission id such as "persons.list.client.omde". The
// frontend expands each stored rid into its ancestors at runtime via
// checkParent() — see apps/admin-panel/src/stores/users.ts. Only the 58 leaf
// rids the routers actually gate are seeded; ancestors are derived, not stored.
// ─────────────────────────────────────────────────────────────────────────

model UserType {
  /// Legacy `permission.ut` / `users.ut` — an integer, kept as the PK so seeded
  /// rows keep their legacy identity rather than getting new cuids.
  id        Int      @id
  title     String
  isActive  Boolean  @default(true)
  createdAt DateTime @default(now())

  permissions Permission[]
  adminUsers  AdminUser[]

  @@map("user_type")
}

model Permission {
  /// Dotted permission id, e.g. "order.list", "persons.list.client.omde".
  rid        String
  userTypeId Int
  userType   UserType @relation(fields: [userTypeId], references: [id], onDelete: Cascade)

  /// Legacy's composite primary key (rid, ut), preserved exactly.
  @@id([rid, userTypeId])
  @@index([userTypeId])
  @@map("permission")
}

// ─────────────────────────────────────────────────────────────────────────
// Product comments / reviews — legacy `comment` table (App\Models\Comment),
// moderated from views/customer/Comments/Comments.vue.
//
// Legacy fillable: product_id, comment, reply_to, sts, customer_id
// Legacy Comment::$STS = [1 => 'در انتظار تایید', 2 => 'تایید شده', 3 => 'رد شده']
// which is represented here as an enum rather than a magic integer.
// ─────────────────────────────────────────────────────────────────────────

enum CommentStatus {
  PENDING // 1 — در انتظار تایید
  APPROVED // 2 — تایید شده
  REJECTED // 3 — رد شده
}

model Comment {
  id         String        @id @default(cuid())
  productId  String
  product    Product       @relation(fields: [productId], references: [id])
  customerId String
  customer   Customer      @relation(fields: [customerId], references: [id])
  body       String
  status     CommentStatus @default(PENDING)

  /// Legacy `reply_to`: a staff reply threads under the comment it answers.
  replyToId String?
  replyTo   Comment?  @relation("CommentReplies", fields: [replyToId], references: [id])
  replies   Comment[] @relation("CommentReplies")

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

  @@index([productId])
  @@index([customerId])
  @@index([status])
}

// ─────────────────────────────────────────────────────────────────────────
// Settings — replaces legacy `config_static`, a key/value table the admin
// panel read and wrote through endpoints like /wallet/config and
// /const/__list__ut. Values are stored as JSON so a setting can hold a scalar,
// an object, or the dynamic option lists legacy kept under `__list__*` keys.
// ─────────────────────────────────────────────────────────────────────────

model Setting {
  key       String   @id
  value     Json
  updatedAt DateTime @updatedAt
}

// ─────────────────────────────────────────────────────────────────────────
// Promotions / discounts — legacy views/promotion/*, served by
// PromotionController (`product/variant/promotion`). The redesigned schema had
// no promotion concept at all; this models what the legacy forms actually
// collect.
// ─────────────────────────────────────────────────────────────────────────

/// Legacy Promotion.type — what the discount is scoped to.
enum PromotionScope {
  PRODUCT // 1 محصولات
  CATEGORY // 2 دسته بندی
  CUSTOMER // 3 مشتری
  BRAND // 4 برند
}

/// Legacy Promotion.use_only — how often a customer may redeem it.
enum PromotionUsage {
  ONCE // 1 فقط یکبار
  UNTIL_END_DATE // 2 تا تاریخ پایان
}

model Promotion {
  id              String         @id @default(cuid())
  title           String
  description     String?
  scope           PromotionScope @default(PRODUCT)
  usage           PromotionUsage @default(ONCE)
  /// Percentage off, 0-100 (legacy discount_percent).
  discountPercent Decimal        @db.Decimal(6, 3)
  isActive        Boolean        @default(true)
  /// Which storefront it shows on, mirroring Product.showType (legacy platform).
  platform        Int            @default(3)

  startsAt DateTime?
  endsAt   DateTime?

  /// Exactly one of these is populated, per `scope`.
  productId  String?
  product    Product?  @relation(fields: [productId], references: [id])
  categoryId String?
  category   Category? @relation(fields: [categoryId], references: [id])
  customerId String?
  customer   Customer? @relation(fields: [customerId], references: [id])
  brandId    String?
  brand      Brand?    @relation(fields: [brandId], references: [id])

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

  @@index([scope, isActive])
}

/// Legacy "ignore" table (views/offersIgnore) — specific products, categories,
/// customers or brands excluded from the automatic discount engine.
/// Legacy posts { type, item_id[] }: "type" reuses the promotion scope codes
/// (1 محصولات | 2 دسته بندی | 3 مشتری | 4 برند) and "itemId" is the excluded row.
model PromotionExclusion {
  id        String   @id @default(cuid())
  type      Int
  itemId    String
  createdAt DateTime @default(now())

  @@unique([type, itemId])
  @@index([type])
}

// ─────────────────────────────────────────────────────────────────────────
// Branch stock allocation — legacy views/invoice/* ("فاکتور انتقال"), served by
// BranchController as `branch/product`. Despite the screen being called an
// invoice, it is not a sales document: it records which products head office
// allocated to a branch, and who allocated them.
// ─────────────────────────────────────────────────────────────────────────

model BranchAllocation {
  id       String @id @default(cuid())
  branchId String
  branch   Branch @relation(fields: [branchId], references: [id])

  /// Legacy `allocator_user` — the admin who filed the allocation.
  allocatorAdminUserId String?
  allocatorAdminUser   AdminUser? @relation("AllocationAuthor", fields: [allocatorAdminUserId], references: [id])

  note      String?
  createdAt DateTime @default(now())

  items BranchAllocationItem[]

  @@index([branchId])
}

model BranchAllocationItem {
  id           String           @id @default(cuid())
  allocationId String
  allocation   BranchAllocation @relation(fields: [allocationId], references: [id], onDelete: Cascade)
  productId    String
  product      Product          @relation(fields: [productId], references: [id])
  /// Weight snapshot at allocation time, so later catalog edits do not rewrite history.
  weightGrams  Decimal?         @db.Decimal(14, 4)

  @@unique([allocationId, productId])
}

// ─────────────────────────────────────────────────────────────────────────
// Messaging + audit — legacy views/sms, views/notify, views/newsletters and
// views/statics. None of these had a model in the redesigned schema.
// ─────────────────────────────────────────────────────────────────────────

/// Who an SMS or notification was aimed at. Legacy's sms/create offered these
/// audiences, each gated by its own rid (sms.create.all, .omde, .single, ...).
enum MessageAudience {
  SINGLE_NUMBER // یک شماره
  MULTIPLE_NUMBERS // چند شماره
  ALL_CUSTOMERS // همه
  WHOLESALE_CUSTOMERS // عمده
  RETAIL_CUSTOMERS // تک
  SALES_AGENTS // کارشناسان فروش
}

model SmsMessage {
  id         String          @id @default(cuid())
  audience   MessageAudience
  /// Comma-separated recipients for the SINGLE/MULTIPLE audiences.
  recipients String?
  body       String
  /// How many numbers the send actually resolved to.
  sentCount  Int             @default(0)

  sentByAdminUserId String?
  sentByAdminUser   AdminUser? @relation("SmsAuthor", fields: [sentByAdminUserId], references: [id])

  createdAt DateTime @default(now())

  @@index([createdAt])
}

model Notification {
  id       String          @id @default(cuid())
  title    String
  body     String
  audience MessageAudience @default(ALL_CUSTOMERS)

  sentByAdminUserId String?
  sentByAdminUser   AdminUser? @relation("NotificationAuthor", fields: [sentByAdminUserId], references: [id])

  createdAt DateTime @default(now())

  recipients NotificationRecipient[]

  @@index([createdAt])
}

/// Per-customer delivery + read state — legacy `GET notify/read/{id}`.
model NotificationRecipient {
  id             String       @id @default(cuid())
  notificationId String
  notification   Notification @relation(fields: [notificationId], references: [id], onDelete: Cascade)
  customerId     String
  customer       Customer     @relation(fields: [customerId], references: [id])
  readAt         DateTime?

  @@unique([notificationId, customerId])
  @@index([customerId, readAt])
}

/// Legacy views/newsletters — the mailing-list signups collected by the site.
model NewsletterSubscriber {
  id        String   @id @default(cuid())
  email     String?
  mobile    String?
  createdAt DateTime @default(now())

  @@unique([email])
  @@unique([mobile])
}

/// Legacy views/statics — the customer activity log the "آمار" screen reads
/// (`log/list/customer`, `log/ago/{customerId}`).
model CustomerActivityLog {
  id         String   @id @default(cuid())
  customerId String
  customer   Customer @relation(fields: [customerId], references: [id])
  /// Free-form action key, e.g. 'login', 'order.placed', 'profile.updated'.
  action     String
  detail     String?
  createdAt  DateTime @default(now())

  @@index([customerId, createdAt])
}

// ─────────────────────────────────────────────────────────────────────────
// Uploads — replaces the legacy MyUpload / SingleUploadInput widgets, which
// POSTed to a file endpoint and stored the returned URL on the owning record.
// Ports of those forms currently take a URL by hand; this gives them a real
// destination to upload to.
// ─────────────────────────────────────────────────────────────────────────

model UploadedFile {
  id           String  @id @default(cuid())
  /// Public URL the stored file is served from.
  url          String
  originalName String
  mimeType     String
  sizeBytes    Int
  /// Free-form tag for what the file belongs to, e.g. 'product', 'category',
  /// 'customer.nationalId'. Kept loose so a new form needs no schema change.
  purpose      String?

  uploadedByAdminUserId String?
  uploadedByAdminUser   AdminUser? @relation("FileUploader", fields: [uploadedByAdminUserId], references: [id])

  createdAt       DateTime   @default(now())
  customerAvatars Customer[] @relation("CustomerAvatar")

  @@index([purpose])
}