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

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

enum Role {
  TECHNICAL
  MANNING
  ACCOUNTS
  MANAGER
  SUPERUSER
  AUDITOR
  ADMIN
  SITE_STAFF
}

enum POStatus {
  DRAFT
  SUBMITTED
  MGR_REVIEW
  VENDOR_ID_PENDING
  EDITS_REQUESTED
  REJECTED
  MGR_APPROVED
  SENT_FOR_PAYMENT
  PARTIALLY_PAID
  PAID_DELIVERED
  PARTIALLY_CLOSED
  CLOSED
  CANCELLED
}

enum ActionType {
  CREATED
  SUBMITTED
  APPROVED
  APPROVED_WITH_NOTE
  REJECTED
  EDITS_REQUESTED
  VENDOR_ID_REQUESTED
  VENDOR_ID_PROVIDED
  PAYMENT_SENT
  PARTIAL_PAYMENT_CONFIRMED
  RECEIPT_CONFIRMED
  PARTIAL_RECEIPT_CONFIRMED
  CLOSED
  REASSIGNED
  PRODUCT_PRICE_UPDATED
  MANAGER_LINE_EDIT
  CANCELLED
  SUPERSEDED
}

enum RequestStatus {
  PENDING
  APPROVED
  DENIED
}

// ─── Crewing (feature-flagged: NEXT_PUBLIC_CREWING_ENABLED) ──────────────────
// Phase 1 (Foundations) lands only the reference-data layer. The lifecycle
// models/enums (Requisition, Application, Assignment, …) arrive in later phases.
// See wiki Crewing-Implementation-Spec §12.

// Org-chart grouping for a Rank. Drives reporting/segmentation, not login.
enum RankCategory {
  OPERATIONAL
  SUPPORT
}

// The seafarer/crew document set a rank may be required to hold. Drives
// candidate vetting and crew uploads via RankDocRequirement.
enum SeafarerDocType {
  STCW
  AADHAAR
  PAN
  PASSPORT
  CDC
  COC
  PHOTOGRAPH
  DRIVING_LICENSE
  MEDICAL_FITNESS
  CONTRACT_LETTER
}

// ─── Crewing lifecycle (Phase 2: Requisitions + relief) ─────────────────────
// Requisition lifecycle — Crewing-Implementation-Spec §5.2. The intermediate
// stages (SHORTLISTING…SELECTED) are advanced by the recruitment pipeline that
// lands in Phase 3; Phase 2 wires OPEN, CANCELLED and the FILLED terminal.
enum RequisitionStatus {
  OPEN
  SHORTLISTING
  PROPOSING
  INTERVIEWING
  SELECTED
  FILLED
  CANCELLED
}

// Why a vacancy exists. LEAVE / SIGN_OFF / END_OF_CONTRACT are the system
// auto-raise reasons (§5.2/§5.3); the rest are raised manually by MPO/Manager.
enum RequisitionReason {
  NEW_VACANCY
  REPLACEMENT
  LEAVE
  SIGN_OFF
  END_OF_CONTRACT
  OTHER
}

// A foreseen-gap flag raised by site staff (§8.2 "Relief requests from sites").
// The office converts an OPEN relief request into a real requisition.
enum ReliefRequestStatus {
  OPEN
  CONVERTED
  CANCELLED
}

// Crewing audit-trail action types — the CrewAction mirror of ActionType for
// POAction (§4.5/§11). Extended per phase; Phase 2 covers requisition + relief.
enum CrewActionType {
  REQUISITION_RAISED
  REQUISITION_ADVANCED
  REQUISITION_FILLED
  REQUISITION_CANCELLED
  RELIEF_REQUESTED
  RELIEF_CONVERTED
  RELIEF_CANCELLED
}

model User {
  id           String   @id @default(cuid())
  employeeId   String   @unique
  email        String   @unique
  name         String
  passwordHash String?
  role         Role
  isActive     Boolean  @default(true)
  signatureKey String?
  createdAt    DateTime @default(now())
  updatedAt    DateTime @updatedAt

  submittedPOs       PurchaseOrder[]    @relation("Submitter")
  actions            POAction[]
  notifications      Notification[]
  consumption        ItemConsumption[]
  superUserRequests  SuperUserRequest[] @relation("Requester")
  resolvedRequests   SuperUserRequest[] @relation("RequestResolver")
  requisitionsRaised Requisition[]      @relation("RequisitionRaiser")
  reliefRequested    ReliefRequest[]    @relation("ReliefRequester")
  crewActions        CrewAction[]
}

model SuperUserRequest {
  id           String        @id @default(cuid())
  userId       String
  user         User          @relation("Requester", fields: [userId], references: [id])
  reason       String?
  status       RequestStatus @default(PENDING)
  createdAt    DateTime      @default(now())
  resolvedAt   DateTime?
  resolvedById String?
  resolvedBy   User?         @relation("RequestResolver", fields: [resolvedById], references: [id])
}

model Site {
  id        String   @id @default(cuid())
  name      String
  code      String   @unique
  address   String?
  latitude  Float?
  longitude Float?
  isActive  Boolean  @default(true)
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  purchaseOrders PurchaseOrder[]
  inventory      ItemInventory[]
  consumption    ItemConsumption[]
  requisitions   Requisition[]
  reliefRequests ReliefRequest[]
}

model Vessel {
  id       String  @id @default(cuid())
  name     String
  code     String  @unique
  isActive Boolean @default(true)

  purchaseOrders PurchaseOrder[]
  requisitions   Requisition[]
  reliefRequests ReliefRequest[]
}

model Company {
  id             String   @id @default(cuid())
  name           String
  code           String?  @unique
  gstNumber      String?
  address        String?
  telephone      String?
  mobile         String?
  email          String?
  invoiceEmail   String?
  invoiceAddress String?
  logoKey        String? // storage key for uploaded logo image (top of exported POs)
  stampKey       String? // storage key for uploaded company stamp/seal (signatory block of exported POs)
  isActive       Boolean  @default(true)
  createdAt      DateTime @default(now())
  updatedAt      DateTime @updatedAt

  purchaseOrders PurchaseOrder[]
}

model Account {
  id          String  @id @default(cuid())
  code        String  @unique
  name        String
  description String?
  isActive    Boolean @default(true)

  parentId String?
  parent   Account?  @relation("AccountHierarchy", fields: [parentId], references: [id])
  children Account[] @relation("AccountHierarchy")

  purchaseOrders PurchaseOrder[]
  lineItems      POLineItem[]
}

model VendorContact {
  id        String   @id @default(cuid())
  name      String
  role      String?
  mobile    String?
  email     String?
  isPrimary Boolean  @default(false)
  createdAt DateTime @default(now())

  vendorId String
  vendor   Vendor @relation(fields: [vendorId], references: [id], onDelete: Cascade)
}

model Vendor {
  id         String   @id @default(cuid())
  name       String
  vendorId   String?  @unique
  address    String?
  pincode    String?
  gstin      String?
  latitude   Float?
  longitude  Float?
  isVerified Boolean  @default(false)
  isActive   Boolean  @default(true)
  createdAt  DateTime @default(now())

  contacts       VendorContact[]
  purchaseOrders PurchaseOrder[]
  products       Product[]            @relation("ProductLastVendor")
  vendorPrices   ProductVendorPrice[]
}

model Product {
  id           String   @id @default(cuid())
  code         String   @unique
  name         String
  description  String?
  lastPrice    Decimal? @db.Decimal(12, 2)
  lastVendorId String?
  lastVendor   Vendor?  @relation("ProductLastVendor", fields: [lastVendorId], references: [id])
  isActive     Boolean  @default(true)
  updatedAt    DateTime @updatedAt
  createdAt    DateTime @default(now())

  lineItems    POLineItem[]
  vendorPrices ProductVendorPrice[]
  inventory    ItemInventory[]
  consumption  ItemConsumption[]
}

model ProductVendorPrice {
  id        String   @id @default(cuid())
  price     Decimal  @db.Decimal(12, 2)
  updatedAt DateTime @updatedAt

  productId String
  product   Product @relation(fields: [productId], references: [id], onDelete: Cascade)
  vendorId  String
  vendor    Vendor  @relation(fields: [vendorId], references: [id])

  @@unique([productId, vendorId])
}

model ItemInventory {
  id        String   @id @default(cuid())
  quantity  Decimal  @db.Decimal(10, 3)
  updatedAt DateTime @updatedAt

  productId String
  product   Product @relation(fields: [productId], references: [id])
  siteId    String
  site      Site    @relation(fields: [siteId], references: [id])

  @@unique([productId, siteId])
}

model ItemConsumption {
  id       String   @id @default(cuid())
  date     DateTime @db.Date
  quantity Decimal  @db.Decimal(10, 3)
  note     String?

  productId    String
  product      Product @relation(fields: [productId], references: [id])
  siteId       String
  site         Site    @relation(fields: [siteId], references: [id])
  recordedById String
  recordedBy   User    @relation(fields: [recordedById], references: [id])

  @@unique([productId, siteId, date])
}

model PurchaseOrder {
  id                 String    @id @default(cuid())
  poNumber           String    @unique
  title              String
  status             POStatus  @default(DRAFT)
  totalAmount        Decimal   @db.Decimal(12, 2)
  currency           String    @default("INR")
  dateRequired       DateTime?
  projectCode        String?
  managerNote        String?
  paymentRef         String?
  paymentDate        DateTime?
  paidAmount         Decimal?  @db.Decimal(12, 2)
  piQuotationNo      String?
  piQuotationDate    DateTime?
  requisitionNo      String?
  requisitionDate    DateTime?
  placeOfDelivery    String?
  tcDelivery         String?
  tcDispatch         String?
  tcInspection       String?
  tcTransitInsurance String?
  tcPaymentTerms     String?
  tcOthers           String?
  poDate             DateTime?
  submittedAt        DateTime?
  approvedAt         DateTime?
  paidAt             DateTime?
  closedAt           DateTime?
  cancelledAt        DateTime?
  cancellationReason String?
  createdAt          DateTime  @default(now())
  updatedAt          DateTime  @updatedAt

  submitterId String
  submitter   User     @relation("Submitter", fields: [submitterId], references: [id])
  vesselId    String
  vessel      Vessel   @relation(fields: [vesselId], references: [id])
  accountId   String
  account     Account  @relation(fields: [accountId], references: [id])
  companyId   String?
  company     Company? @relation(fields: [companyId], references: [id])
  vendorId    String?
  vendor      Vendor?  @relation(fields: [vendorId], references: [id])
  siteId      String?
  site        Site?    @relation(fields: [siteId], references: [id])

  // Supersede: a cancelled PO may be linked to the existing PO that replaces it.
  // `supersededBy` is that replacement; `supersedes` is the reciprocal list.
  supersededById String?
  supersededBy   PurchaseOrder?  @relation("Supersede", fields: [supersededById], references: [id])
  supersedes     PurchaseOrder[] @relation("Supersede")

  lineItems     POLineItem[]
  documents     PODocument[]
  actions       POAction[]
  receipt       Receipt?
  notifications Notification[]
}

model POLineItem {
  id                String   @id @default(cuid())
  name              String
  description       String?
  quantity          Decimal  @db.Decimal(10, 3)
  unit              String
  unitPrice         Decimal  @db.Decimal(12, 2)
  totalPrice        Decimal  @db.Decimal(12, 2)
  gstRate           Decimal  @default(0.18) @db.Decimal(5, 4)
  sortOrder         Int      @default(0)
  size              String?
  deliveredQuantity Decimal? @db.Decimal(10, 3)
  productId         String?
  product           Product? @relation(fields: [productId], references: [id])
  accountId         String?
  account           Account? @relation(fields: [accountId], references: [id])

  poId String
  po   PurchaseOrder @relation(fields: [poId], references: [id], onDelete: Cascade)
}

model PODocument {
  id         String   @id @default(cuid())
  fileName   String
  fileSize   Int
  mimeType   String
  storageKey String
  uploadedAt DateTime @default(now())

  poId String
  po   PurchaseOrder @relation(fields: [poId], references: [id], onDelete: Cascade)
}

model POAction {
  id         String     @id @default(cuid())
  actionType ActionType
  note       String?
  metadata   Json?
  createdAt  DateTime   @default(now())

  poId    String
  po      PurchaseOrder @relation(fields: [poId], references: [id])
  actorId String
  actor   User          @relation(fields: [actorId], references: [id])
}

model Receipt {
  id          String   @id @default(cuid())
  storageKey  String
  fileName    String
  notes       String?
  confirmedAt DateTime @default(now())

  poId String        @unique
  po   PurchaseOrder @relation(fields: [poId], references: [id])
}

model Notification {
  id      String   @id @default(cuid())
  subject String
  body    String
  link    String?
  isRead  Boolean  @default(false)
  sentAt  DateTime @default(now())
  status  String   @default("sent")

  poId   String?
  po     PurchaseOrder? @relation(fields: [poId], references: [id])
  userId String
  user   User           @relation(fields: [userId], references: [id])
}

// ─── Crewing reference data ──────────────────────────────────────────────────

// The crew org hierarchy. A self-referential tree (parent/children), exactly
// like the Account accounting-code hierarchy. Reference data managed at
// /admin/ranks. `grantsLogin` is true only for the three management ranks
// (PM, Assistant PM, Site In-charge) — every other rank is a crew member /
// data subject with no portal account. See Crewing-Data-Model §2.
model Rank {
  id          String       @id @default(cuid())
  code        String       @unique
  name        String
  description String?
  category    RankCategory @default(OPERATIONAL)
  isSeafarer  Boolean      @default(false)
  grantsLogin Boolean      @default(false)
  isActive    Boolean      @default(true)
  createdAt   DateTime     @default(now())
  updatedAt   DateTime     @updatedAt

  parentId String?
  parent   Rank?   @relation("RankHierarchy", fields: [parentId], references: [id])
  children Rank[]  @relation("RankHierarchy")

  docRequirements RankDocRequirement[]
  requisitions    Requisition[]
  reliefRequests  ReliefRequest[]
}

// Which documents a rank is required (or conditionally required) to hold.
// `isMandatory = false` is the "conditional" tag in the UI.
model RankDocRequirement {
  id          String          @id @default(cuid())
  rankId      String
  rank        Rank            @relation(fields: [rankId], references: [id], onDelete: Cascade)
  docType     SeafarerDocType
  isMandatory Boolean         @default(true)
  note        String?
  createdAt   DateTime        @default(now())

  @@unique([rankId, docType])
}

// ─── Crewing lifecycle models (Phase 2) ──────────────────────────────────────

// A vacancy to be filled for a rank on a vessel/site. Raised manually by
// MPO/Manager, or auto-raised by the system on a leave clash / sign-off / EOC
// (autoRaised = true). The recruitment pipeline (Phase 3) attaches candidates
// and drives the intermediate stages. See Crewing-Implementation-Spec §5.2/§8.
model Requisition {
  id                 String            @id @default(cuid())
  code               String            @unique // mono id, e.g. REQ-9000
  status             RequisitionStatus @default(OPEN)
  reason             RequisitionReason @default(NEW_VACANCY)
  autoRaised         Boolean           @default(false)
  neededBy           DateTime?
  notes              String?
  cancelledAt        DateTime?
  cancellationReason String?
  filledAt           DateTime?
  createdAt          DateTime          @default(now())
  updatedAt          DateTime          @updatedAt

  rankId   String
  rank     Rank    @relation(fields: [rankId], references: [id])
  vesselId String?
  vessel   Vessel? @relation(fields: [vesselId], references: [id])
  siteId   String?
  site     Site?   @relation(fields: [siteId], references: [id])

  // Null when the system auto-raised it.
  raisedById String?
  raisedBy   User?   @relation("RequisitionRaiser", fields: [raisedById], references: [id])

  // The site relief request this requisition was converted from, if any.
  sourceReliefRequest ReliefRequest? @relation("ReliefConversion")

  actions CrewAction[]
}

// A foreseen-gap flag from a site (site staff), pending office conversion into a
// Requisition. Complementary, proactive channel to the auto-raised LEAVE
// requisition. See Crewing-Implementation-Spec §8.2 (R3/R6).
model ReliefRequest {
  id        String              @id @default(cuid())
  status    ReliefRequestStatus @default(OPEN)
  note      String?
  createdAt DateTime            @default(now())
  updatedAt DateTime            @updatedAt

  rankId   String
  rank     Rank    @relation(fields: [rankId], references: [id])
  vesselId String?
  vessel   Vessel? @relation(fields: [vesselId], references: [id])
  siteId   String?
  site     Site?   @relation(fields: [siteId], references: [id])

  requestedById String
  requestedBy   User   @relation("ReliefRequester", fields: [requestedById], references: [id])

  // Set when an MPO/Manager converts it; one relief request → one requisition.
  convertedRequisitionId String?      @unique
  convertedRequisition   Requisition? @relation("ReliefConversion", fields: [convertedRequisitionId], references: [id])
}

// Crewing audit trail — one row per transition / verification (mirror of
// POAction). Entity relations are added per phase; Phase 2 links requisitions.
model CrewAction {
  id         String         @id @default(cuid())
  actionType CrewActionType
  note       String?
  metadata   Json?
  createdAt  DateTime       @default(now())

  // Null for system-performed actions (auto-raise).
  actorId String?
  actor   User?   @relation(fields: [actorId], references: [id])

  requisitionId String?
  requisition   Requisition? @relation(fields: [requisitionId], references: [id])
}