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

datasource db {
  provider = "postgresql"
}

enum Role {
  ADMIN
  ISSUER
}

model Facility {
  id                   String    @id @default(cuid())
  name                 String
  location             String    @default("Linen Room")
  coordinator          String    @default("")
  /// How the linen room is reached, printed in the footer of the order form a ward manager signs. Held
  /// here and nowhere else: the form carries a real health service's contacts, and the only place
  /// a customer's own address and number may live is that customer's own settings.
  coordinatorEmail     String    @default("")
  coordinatorPhone     String    @default("")
  /// The IANA zone this linen room actually stands in. Every date-only column (Issue.date,
  /// Stocktake.date, Order.date, HandIn.date…) is "today" as this zone sees it, which is what
  /// decides the month an issue is journalled in and the date printed on a credit slip. Brisbane
  /// only because that is where the first facility was; a Perth or Hobart room sets its own.
  timezone             String    @default("Australia/Brisbane")
  defaultEntitlement   Int       @default(5)
  /// The starting kit, in sets — a set being a top and a bottom — for the staff groups on the
  /// starting-kit route (kitGroups): handed over on the first day, with more issued as needed up to
  /// capSets. The FTE-table groups (nursingGroups) start on a number proposed by their hours instead,
  /// and groups on manager approval start on none. A starting kit and not a yearly allowance, so it
  /// is nothing to do with defaultEntitlement, which still counts garments per financial year for
  /// everything that reads it.
  initialSets          Int       @default(3)
  /// The ceiling, in sets HELD at any one time, for every staff group in the building, whichever of
  /// the three routes it is on. Six sets is twelve garments, and there is no financial year in it:
  /// the only ways past it are a hand-in, which swaps rather than adds, and a coordinator's override,
  /// recorded as one. The routes differ only in how somebody gets up to it — hours proposing a
  /// number, a starting kit, or a manager approving a set at a time.
  capSets              Int       @default(6)
  defaultReorder       Int       @default(3)
  exceptionHigh        Int       @default(10)
  varianceReason       Int       @default(5) // a count gap this big or bigger has to carry a reason
  glAccount            String    @default("")
  journalDesc          String    @default("Uniform issues")
  lastBackup           String    @default("")
  logoData             String    @default("")
  barcodeLookup        Boolean   @default(false) // ask a public barcode database for a product name when an unknown code is scanned
  /// Single sign-on through the facility's own identity provider (SAML/OIDC via the Jackson
  /// broker; the IdP metadata lives in Jackson, keyed by this facility's id). Domains decide whose
  /// email reaches SSO; required means the password door is refused for everyone except admins
  /// flagged break-glass; staff says wearers with an account may use it too (web only).
  ssoEnabled           Boolean   @default(false)
  ssoRequired          Boolean   @default(false)
  ssoStaff             Boolean   @default(false)
  ssoDomains           String[]  @default([])
  staffGroups          String[]  @default([])
  /// The staff groups on the FTE-table route: the hours they work propose their starting kit, off the
  /// table on the signed order form, and a manager may sign above it up to capSets. A list of names
  /// this facility chose rather than a test for letters in a name, because every employer names its
  /// groups differently. Empty means none of its groups are on that route — there is no fallback.
  /// Renaming a group renames it here too, which is the point: nobody's allowance may change because
  /// a label was tidied up.
  nursingGroups        String[]  @default([])
  /// The staff groups on the starting-kit route: initialSets on the first day, then more as needed up
  /// to capSets, with nothing to hand back first. Read and renamed exactly as nursingGroups is, and a
  /// group may not be on both. A group on neither list is on manager approval — no starting kit, and
  /// a manager approves a set at a time.
  kitGroups            String[]  @default([])
  orderSeq             Int       @default(0)
  catalogSeq           Int       @default(0)
  /// Numbers the staff-app requests (R-0001…). Incremented inside the same transaction that
  /// creates the request, like orderSeq, so two people submitting at once can't collide on a code.
  requestSeq           Int       @default(0)
  /// Bumped once per successful mutation, by the three routes that can change anything here.
  ///
  /// The screens already know how to reload themselves — every mutation ends in router.refresh().
  /// What they had no way to know was that somebody ELSE had changed something, so a phone on a
  /// ward showed whatever the catalogue looked like when it was opened. Polling the whole snapshot
  /// to find out would mean re-reading the facility's history every few seconds on every device;
  /// polling this integer costs a primary-key lookup and a couple of hundred bytes, and the
  /// expensive fetch happens only when the number has actually moved.
  rev                  Int       @default(0)
  /// Numbers the barcodes this room prints for garments that arrived without one. Incremented in
  /// the same transaction that binds the code, like orderSeq, so two people labelling at once
  /// cannot mint the same number.
  barcodeSeq           Int       @default(0)
  slipCollectionFooter String    @default("Collect from the Linen Room during opening hours. Enquiries: see coordinator.")
  slipDeliveryFooter   String    @default("After hours deliveries are left with the manager or team leader on duty.")
  slipOrg              String    @default("")
  /// The plan, and where the facility stands on it. Written only by ThreadCount and
  /// by sign-up; read by lib/plan.ts, which turns these six columns into the entitlements every
  /// write door checks. `plan` is a code (hosted_small · hosted_facility · health_service ·
  /// private; empty means "whatever a new sign-up gets"), `planStatus` is what was last
  /// set (free · trial · active · read_only) and the dates decide what that means today — a trial
  /// past trialEndsAt, or a paid year past paidUntil, runs a fortnight of grace and then goes
  /// read-only. Nothing is ever deleted for money: read-only keeps every report, export and the
  /// backup working.
  ///
  /// `grandfathered` is the promise the pricing page made while the product was free: every
  /// facility created before plans went live keeps everything, hosted, for as long as it exists.
  /// It survives a change of plan, so a grandfathered room that buys and later lapses falls back to
  /// free, never to read-only. Only an explicit read_only overrides it.
  plan                 String    @default("")
  planNote             String    @default("")
  planStatus           String    @default("free")
  trialEndsAt          DateTime?
  paidUntil            DateTime?
  /// Where invoices go. A contact, set by the coordinator from Settings › Plan and shown to
  /// nobody else.
  billingEmail         String    @default("")
  grandfathered        Boolean   @default(false)
  isDemo               Boolean   @default(false)
  demoResetAt          DateTime?
  createdAt            DateTime  @default(now())
  /// The health service this facility belongs to, if any. Set by ThreadCount when a
  /// Health Service plan is sold. A member facility's entitlements come from the organisation's
  /// plan row, not its own (lib/plan.ts), and its catalogue and suppliers may be published to it
  /// from the organisation's. Nothing about a wearer crosses this line: the organisation sees
  /// roll-ups, and reaching a facility's records still takes a coordinator account there.
  orgId                String?
  org                  Organisation? @relation(fields: [orgId], references: [id], onDelete: SetNull)
  /// Card payments (Stripe), dormant until STRIPE_* is set. Ids only; no card data is ever here.
  stripeCustomerId     String    @default("")
  stripeSubscriptionId String    @default("")

  users         User[]
  items         CatalogItem[]
  barcodes      Barcode[]
  stock         StockLevel[]
  moves         StockMove[]
  depts         Department[]
  staff         Staff[]
  issues        Issue[]
  orders        Order[]
  pickups       Pickup[]
  stocktakes    Stocktake[]
  suppliers     Supplier[]
  approvals     Approval[]
  alterations   Alteration[]
  handins       HandIn[]
  photos        Photo[]
  locations     Location[]
  auditEvents   AuditEvent[]
  costChanges   CostChange[]
  staffAccounts StaffAccount[]
  requests      Request[]
  waitlist      WaitlistEntry[]
  kitChecks     KitCheck[]
  notices       LinenNotice[]
  damageReports DamageReport[]
  disputes      RecordDispute[]

  @@index([orgId])
}

/// A health service: several facilities under one owner, one plan, one sign-in for the people who
/// run it, and a catalogue and supplier list the facilities can inherit. It is not a facility and
/// holds no wearer, staff or issue records of its own — what it can see is what lib/orgdata.ts
/// computes as roll-ups. Created only by ThreadCount.
model Organisation {
  id           String   @id @default(cuid())
  name         String
  createdAt    DateTime @default(now())
  /// The plan the member facilities inherit — the same columns Facility carries, read by
  /// lib/plan.ts in the facility's place whenever Facility.orgId is set.
  plan         String   @default("health_service")
  planStatus   String   @default("trial")
  trialEndsAt  DateTime?
  paidUntil    DateTime?
  billingEmail String   @default("")
  planNote     String   @default("")
  /// Organisation-level single sign-on: one IdP connection (Jackson tenant "org:<id>") that every
  /// member facility's coordinators may sign in through. Domains route an email to it.
  ssoEnabled   Boolean  @default(false)
  ssoDomains   String[] @default([])

  facilities Facility[]
  users      OrgUser[]
  items      OrgCatalogItem[]
  suppliers  OrgSupplier[]
  events     OrgEvent[]
}

/// Somebody who runs a health service's uniform programme across its facilities. A fourth kind
/// of identity (see lib/org/session.ts), never a coordinator: holding this account opens the
/// organisation's roll-ups and its shared lists, and nothing inside any facility.
model OrgUser {
  id            String       @id @default(cuid())
  orgId         String
  org           Organisation @relation(fields: [orgId], references: [id], onDelete: Cascade)
  email         String       @unique
  name          String
  passwordHash  String
  totpSecret    String       @default("")
  totpEnabledAt DateTime?
  inactive      Boolean      @default(false)
  createdAt     DateTime     @default(now())
  lastSeenAt    DateTime?

  events OrgEvent[]

  @@index([orgId])
}

/// A garment in the organisation's shared catalogue. Publishing writes it into each member
/// facility's own catalogue (CatalogItem.orgItemId links back); the facility keeps its stock,
/// barcodes, locations and reorder levels, and may change cost and supplier locally until the next
/// publish. Sizes are append-only in the facility, as everywhere else.
model OrgCatalogItem {
  id        String       @id @default(cuid())
  orgId     String
  org       Organisation @relation(fields: [orgId], references: [id], onDelete: Cascade)
  item      String
  gender    String       @default("Unisex")
  type      String       @default("")
  sku       String       @default("")
  supplier  String       @default("")
  cost      Float        @default(0)
  groups    String[]     @default([])
  sizes     String[]     @default([])
  notes     String       @default("")
  archived  Boolean      @default(false)
  updatedAt DateTime     @updatedAt
  createdAt DateTime     @default(now())

  @@unique([orgId, item, gender])
}

model OrgSupplier {
  id      String       @id @default(cuid())
  orgId   String
  org     Organisation @relation(fields: [orgId], references: [id], onDelete: Cascade)
  name    String
  contact String       @default("")
  phone   String       @default("")
  account String       @default("")
  lead    Int?

  @@unique([orgId, name])
}

/// What the organisation's people did: sign-ins, publishes, membership changes. Append-only.
model OrgEvent {
  id      String       @id @default(cuid())
  orgId   String
  org     Organisation @relation(fields: [orgId], references: [id], onDelete: Cascade)
  userId  String?
  user    OrgUser?     @relation(fields: [userId], references: [id], onDelete: SetNull)
  action  String
  detail  String       @default("")
  ip      String       @default("")
  at      DateTime     @default(now())

  @@index([orgId, at])
}

model Supplier {
  id         String   @id @default(cuid())
  facilityId String
  facility   Facility @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  name       String
  contact    String   @default("")
  phone      String   @default("")
  account    String   @default("")
  lead       Int?
  sort       Int      @default(0)

  @@unique([facilityId, name])
}

model Approval {
  id         String   @id @default(cuid())
  facilityId String
  facility   Facility @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  staffId    String
  staff      Staff    @relation("ApprovalSubject", fields: [staffId], references: [id], onDelete: Cascade)
  date       String
  /// The approver's name exactly as it was signed on the form. It is a copy, not a lookup, and it
  /// stays one: a form that has been signed does not start reading differently because the person
  /// who signed it was later married, promoted or taken off the register. Every other place this
  /// schema writes a name down beside an id — Order, HandIn, Stocktake — does it for the same
  /// reason.
  byName     String   @default("")
  /// Which person on the register that signature belongs to, when the coordinator picked the
  /// manager out of the register rather than typing them. It is what lets a manager's own history
  /// of approvals be found, and lets it survive that manager being renamed, which matching on
  /// byName never could.
  ///
  /// Nullable because it has to be: every approval recorded before the register search existed
  /// carries a typed name and nothing else, and a manager who is not on the register — an agency
  /// manager, one covering from another ward — still signs forms. A blank here means "we only have the signature",
  /// never "nobody approved this".
  ///
  /// It is also the only reliable way to see that a manager approved their own kit: staffId ==
  /// byStaffId says so outright, where two spellings of the same typed name never could. That case
  /// is now allowed, so anything showing an approval has to be able to say when it happened.
  byStaffId  String?
  /// SetNull rather than Cascade or Restrict, and byName is what makes that safe. Cascade would
  /// delete signed approvals along with the manager who signed them, taking the sets somebody was
  /// actually issued off the record; Restrict would refuse to let the linen room remove a manager
  /// who has ever approved anything, which is most of them. So the approval stays, the link goes,
  /// and the name as signed is still there to read.
  byStaff    Staff?   @relation("ApprovalApprover", fields: [byStaffId], references: [id], onDelete: SetNull)
  sets       Int
  fte        String   @default("")
  notes      String   @default("")
  used       Int      @default(0)
  photoId    String? // photo of the signed order form
  createdAt  DateTime @default(now())

  @@index([staffId])
  // The history screen asks "what has this manager approved?", which without this is a scan of
  // every approval the facility has ever recorded.
  @@index([byStaffId])
}

model Alteration {
  id         String   @id @default(cuid())
  facilityId String
  facility   Facility @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  staffId    String
  staff      Staff    @relation(fields: [staffId], references: [id], onDelete: Cascade)
  date       String
  garment    String
  desc       String   @default("")
  status     String   @default("Requested")
  createdAt  DateTime @default(now())

  @@index([staffId])
}

model User {
  id           String   @id @default(cuid())
  facilityId   String
  facility     Facility @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  email        String   @unique
  passwordHash String
  first        String
  last         String
  title        String   @default("")
  role         Role     @default(ISSUER)
  inactive     Boolean  @default(false)
  /// Keeps a working password when the facility requires single sign-on: the fire escape.
  ssoBreakGlass Boolean @default(false)
  createdAt    DateTime @default(now())

  /// Encrypted with a key derived from SESSION_SECRET — a one-time-password secret sitting in
  /// plaintext is a second factor that one leaked dump removes for every account at once.
  /// Set while enrolling; `totpEnabledAt` is what actually turns the requirement on.
  totpSecret    String    @default("")
  totpEnabledAt DateTime?

  resets         PasswordReset[]
  recovery       RecoveryCode[]
  raisedRequests Request[]

  @@index([facilityId])
}

/// ThreadCount's own administrative identity, separate from every facility.
///
/// Not a User. A User belongs to one facility and every query it can reach is scoped to that
/// facility; an Operator belongs to none and is the one identity that sees across them. Keeping it
/// in its own table means a missed role check on User can never become platform-wide access, and
/// its session is a third cookie with a third key and a third claim name — see lib/ops/session.ts —
/// so no arrangement of the other two tokens can be presented as this one.
///
/// SUPPORT is read-only with no reveal. OWNER may reveal masked contacts, flip switches and open the
/// danger zone. Seeded with one OWNER row; adding a second person is a row plus a Cloudflare Access
/// policy entry, not a refactor.
enum OperatorRole {
  OWNER
  SUPPORT
}

model Operator {
  id           String       @id @default(cuid())
  email        String       @unique
  name         String
  role         OperatorRole @default(SUPPORT)
  passwordHash String
  /// Encrypted like User.totpSecret, but with a key derived from its own secret rather than
  /// SESSION_SECRET: rotating this secret must never touch a customer's second factor,
  /// and the reverse.
  totpSecret    String    @default("")
  totpEnabledAt DateTime?
  inactive      Boolean   @default(false)
  createdAt     DateTime  @default(now())
  lastSeenAt    DateTime?

  events   OperatorEvent[]
  grants   RevealGrant[]
  recovery OperatorRecoveryCode[]
}

/// Single-use codes for the day an operator's phone is lost. Hashed, shown once at enrolment.
/// Without these a lost phone closes the password door until somebody clears the second factor
/// over SSH — and until single sign-on exists, the password door is the only door.
model OperatorRecoveryCode {
  id         String    @id @default(cuid())
  operatorId String
  operator   Operator  @relation(fields: [operatorId], references: [id], onDelete: Cascade)
  codeHash   String
  usedAt     DateTime?

  @@index([operatorId])
}

/// The operations trail. Append-only: nothing in the product updates or deletes a row, and an
/// Operator with rows cannot be deleted (Restrict) — deactivate them instead, the same rule the
/// register applies to a staff member with history.
///
/// `facilityId` is a plain column and deliberately NOT a relation. AuditEvent's facilityId cascades
/// on delete, which would let a facility that closes its account erase every record of what an
/// operator revealed about it. This table remembers regardless. It also lets an event be about
/// nothing in particular — a switch flipped, a sign-in — where AuditEvent has nowhere to file it.
model OperatorEvent {
  id         String   @id @default(cuid())
  operatorId String
  operator   Operator @relation(fields: [operatorId], references: [id], onDelete: Restrict)
  at         DateTime @default(now())
  action     String
  facilityId String   @default("")
  subject    String   @default("")
  detail     String   @default("")
  ip         String   @default("")

  @@index([at])
  @@index([operatorId, at])
  @@index([facilityId, at])
}

/// One row. Platform switches ThreadCount flips without a deploy. The environment
/// still wins when set (SIGNUPS_DISABLED=1, DEMO_DISABLED=1): a box can be locked down by hand and
/// nothing can open it again until the variable goes.
model PlatformSwitch {
  id              String   @id @default("platform")
  signupsDisabled Boolean  @default(false)
  demoDisabled    Boolean  @default(false)
  /// Plans are live: new sign-ups start on Hosted Small instead of being grandfathered, and the
  /// Plan tab appears in Settings. Off until the sixty days' notice to existing rooms has run.
  plansLive       Boolean  @default(false)
  updatedAt       DateTime @updatedAt
}

/// A thirty-minute window in which one masked contact field of one facility is shown unmasked.
///
/// A server-side row rather than a claim in the session cookie, so a grant can be revoked before it
/// expires. The reason is recorded here and mirrored into OperatorEvent; the grant is the mechanism,
/// the event is the record, and both are kept forever.
model RevealGrant {
  id         String   @id @default(cuid())
  operatorId String
  operator   Operator @relation(fields: [operatorId], references: [id], onDelete: Restrict)
  facilityId String
  field      String
  reason     String
  at         DateTime @default(now())
  expiresAt  DateTime

  @@index([operatorId, facilityId, expiresAt])
}

/// Single-use codes for the day the phone is lost.
///
/// Without these a locked-out admin is a locked-out facility, because deleting the last admin
/// deletes everything. Stored hashed, like any other credential.
model RecoveryCode {
  id        String    @id @default(cuid())
  userId    String
  user      User      @relation(fields: [userId], references: [id], onDelete: Cascade)
  codeHash  String
  usedAt    DateTime?
  createdAt DateTime  @default(now())

  @@index([userId])
}

/// A password reset in flight.
///
/// The token is stored hashed, never in the clear: this table is in every backup, and a plaintext
/// token in a leaked dump is a live key to an account until it expires. Rows are single-use and
/// short-lived, and a successful reset changes the password hash, which invalidates every existing
/// session for that user through the session token's password version.
model PasswordReset {
  id        String    @id @default(cuid())
  userId    String
  user      User      @relation(fields: [userId], references: [id], onDelete: Cascade)
  tokenHash String    @unique
  expiresAt DateTime
  usedAt    DateTime?
  createdAt DateTime  @default(now())
  requestIp String    @default("")

  @@index([userId])
  @@index([expiresAt])
}

/// Who changed what, and when.
///
/// Issues and stock movements already record their own actor, but nothing recorded the rest: who
/// edited a price, moved a par level, archived a garment, deleted a staff record or changed the
/// variance threshold. "Who changed this?" is the first question in any review of a hospital
/// system, and until now the answer was "nobody knows".
///
/// Deliberately holds no values — only the operation and the record ids it touched. An audit trail
/// that quoted the data would become a second copy of the staff register, growing forever, outside
/// every retention rule that applies to the first one.
model AuditEvent {
  id         String   @id @default(cuid())
  facilityId String
  facility   Facility @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  at         DateTime @default(now())
  userId     String
  userName   String
  op         String
  target     String   @default("")
  ip         String   @default("")

  @@index([facilityId, at])
}

/// What a garment cost, and when it changed.
///
/// CatalogItem.cost is a single field, so raising a price silently overwrote what you used to pay
/// and "what did these cost us last year" became unanswerable — which is a question finance asks
/// every year. This keeps the old figures.
///
/// Unlike the audit trail this deliberately does hold a value, because the value is the entire
/// point. It is a price, not personal information.
model CostChange {
  id         String      @id @default(cuid())
  facilityId String
  facility   Facility    @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  itemId     String
  item       CatalogItem @relation(fields: [itemId], references: [id], onDelete: Cascade)
  cost       Float
  previous   Float?
  at         DateTime    @default(now())
  byName     String      @default("")

  @@index([facilityId, at])
  @@index([itemId, at])
}

/// A request for uniform, from the person who will wear it.
///
/// The spine of the staff app. Two rules shape every field here.
///
/// First: **no money**. There is no price, no basket and no payment anywhere in this model, and
/// there must not be. Every garment is trust stock issued against a person's record; what it cost
/// is the linen room's business and lives on Issue.
///
/// Second: **the manager sees it before the linen room does**. `status` starts at `awaiting` and
/// the fulfilment fields stay null until someone approves. A request the linen room can act on is
/// one a named person put their name to.
model Request {
  id         String   @id @default(cuid())
  facilityId String
  facility   Facility @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  code       String // human reference, e.g. R-2291

  /// Who the uniform is for. Always the wearer, never the person who typed it in.
  subjectId String
  subject   Staff  @relation("RequestSubject", fields: [subjectId], references: [id], onDelete: Cascade)

  /// Who raised it, when that is not the subject: a ward clerk at the desk, or a coordinator at
  /// the counter. Both names sit on the order — the design is explicit that the subject is never
  /// hidden behind whoever typed it.
  raisedByStaffId String?
  raisedByStaff   Staff?  @relation("RequestRaisedByStaff", fields: [raisedByStaffId], references: [id], onDelete: SetNull)
  raisedByUserId  String?
  raisedByUser    User?   @relation(fields: [raisedByUserId], references: [id], onDelete: SetNull)
  /// Denormalised so the order still names them after the account goes.
  raisedByName    String  @default("")

  /// Why the uniform is needed, and anything the wearer wanted to add. Both sit on the request and
  /// not on the line: a nurse asking for a tunic, trousers and a fleece is making one ask for one
  /// reason, and making them justify each garment separately is the paperwork this replaces.
  reason String @default("") // Worn out | Damaged | Lost | Extra for shifts
  note   String @default("")

  /// awaiting | declined | accepted | picking | ready | round | collected | delivered
  ///
  /// The machine is unchanged, but the decision step is now a ROLLUP of the lines: the manager
  /// looks at the whole ask and approves in one action, while still being able to decline
  /// individual lines. When they decide, if every line ended up `declined` the request goes
  /// `declined`; if at least one line is `approved` it goes `accepted`, and only the approved
  /// lines are picked, bagged and collected. One code, one pick, one collection either way.
  status String @default("awaiting")

  /// The approver, snapshotted at submit time. A later change of manager must not silently
  /// re-address a request that is already with someone.
  managerId     String?
  managerName   String    @default("")
  decidedAt     DateTime?
  /// One of exactly three: Over allowance | Not needed right now | Wrong item for the role.
  /// Always shown to the staff member — a decline without a reason is the thing this replaces.
  /// Set only when the WHOLE request was refused; a partly-approved request carries its refusals
  /// on the individual lines instead.
  declineReason String?

  /// counter | ward_round — chosen by the linen room, never by the requester, who finds out after
  /// the fact.
  route       String?
  /// Four digits shown at the counter. Only ever set for the counter route.
  collectCode String?
  holdUntil   String  @default("")

  /// Anyone on the ward may sign for a round bag, and whoever does is named on the requester's
  /// order — so a bag that never arrived has a name against it.
  signerName String?
  signerRole String?
  signedAt   DateTime?
  /// Set when the bag HAS been picked up off the ward desk — by the requester on their own order,
  /// or by the desk clerk clearing the pile (round.claim, from /my/orders/[id] and /my/round). The
  /// unclaimed list is the delivered rows where this is still null; unclaimed bags are the linen
  /// room's biggest waste, so the desk sees them above today's work.
  claimedAt  DateTime?

  createdAt DateTime @default(now())

  lines    RequestLine[]
  events   RequestEvent[]
  messages RequestMessage[]

  @@unique([facilityId, code])
  @@index([facilityId, status])
  @@index([subjectId])
  @@index([managerId])
}

/// One garment on a request.
///
/// A request used to carry a single garment, so a nurse who needed a tunic, trousers and a fleece
/// raised three of them: three codes, three approval emails to the same manager on the same day,
/// three rows on the linen room's queue, three bags. The garments moved onto lines so that one ask
/// is one request — but each line keeps its OWN status, because a manager quite reasonably wants to
/// approve the tunic and the trousers and refuse the fleece as over allowance. Only the approved
/// lines are picked.
model RequestLine {
  id        String      @id @default(cuid())
  requestId String
  request   Request     @relation(fields: [requestId], references: [id], onDelete: Cascade)
  itemId    String
  item      CatalogItem @relation(fields: [itemId], references: [id], onDelete: Cascade)
  sizeIndex Int
  qty       Int         @default(1)

  /// awaiting | approved | declined. Every line starts `awaiting` and is settled when the manager
  /// decides the request; the request's own status is then the rollup of these.
  status String @default("awaiting")

  /// Why this one garment was refused, from the same three reasons as a whole-request decline.
  /// The wearer is always told which line was knocked back and why — otherwise a bag turning up
  /// two garments short looks like the linen room lost them.
  declineReason String?

  /// The order the requester entered them in, kept so the manager's screen, the pick list and the
  /// bag all read the same way down the page.
  sort Int @default(0)

  @@index([requestId])
}

/// One line of a request's timeline. Append-only: the screen is a history, so nothing here is
/// ever updated or deleted, and the order they were written in is the order they are shown.
model RequestEvent {
  id        String   @id @default(cuid())
  requestId String
  request   Request  @relation(fields: [requestId], references: [id], onDelete: Cascade)
  label     String
  meta      String   @default("")
  actorName String   @default("")
  at        DateTime @default(now())

  @@index([requestId])
}

/// A message about one request. There is no general inbox and no direct messaging: every message
/// hangs off the thing it is about, which is what stops this becoming a chat app nobody staffs.
model RequestMessage {
  id         String    @id @default(cuid())
  requestId  String
  request    Request   @relation(fields: [requestId], references: [id], onDelete: Cascade)
  /// True when the wearer wrote it; false when the linen room did.
  fromStaff  Boolean
  authorName String    @default("")
  body       String
  readAt     DateTime?
  createdAt  DateTime  @default(now())

  @@index([requestId])
}

/// Waiting for a size that is not on the shelf.
///
/// Joining needs no approval — the design is deliberate that a queue is not a request. Approval
/// happens if and when the item lands and the person accepts it.
model WaitlistEntry {
  id         String      @id @default(cuid())
  facilityId String
  facility   Facility    @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  staffId    String
  staff      Staff       @relation(fields: [staffId], references: [id], onDelete: Cascade)
  itemId     String
  item       CatalogItem @relation(fields: [itemId], references: [id], onDelete: Cascade)
  sizeIndex  Int
  /// Set when stock arrives; the item is held for this person for 48 hours from here.
  offeredAt  DateTime?
  acceptedAt DateTime?
  leftAt     DateTime?
  createdAt  DateTime    @default(now())

  /// One place in the queue per garment and size. Joining twice is a bug, not a strategy.
  @@unique([staffId, itemId, sizeIndex])
  @@index([facilityId, itemId, sizeIndex])
}

/// A round of "does this match what is in your locker?", run across the facility.
model KitCheck {
  id         String    @id @default(cuid())
  facilityId String
  facility   Facility  @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  dueBy      String // ISO date
  openedAt   DateTime  @default(now())
  closedAt   DateTime?
  openedBy   String    @default("")

  answers KitCheckAnswer[]

  @@index([facilityId])
}

/// One person's answer about one garment. A shortfall is written off, never charged — the cycle
/// exists to correct the record and set par levels, not to chase anyone.
model KitCheckAnswer {
  id         String      @id @default(cuid())
  kitCheckId String
  kitCheck   KitCheck    @relation(fields: [kitCheckId], references: [id], onDelete: Cascade)
  staffId    String
  staff      Staff       @relation(fields: [staffId], references: [id], onDelete: Cascade)
  itemId     String
  item       CatalogItem @relation(fields: [itemId], references: [id], onDelete: Cascade)
  sizeIndex  Int
  onRecord   Int
  confirmed  Int
  answeredAt DateTime    @default(now())

  @@unique([kitCheckId, staffId, itemId, sizeIndex])
  @@index([kitCheckId, staffId])
}

/// A garment reported damaged. Two jobs: take it off the record, and start the replacement — but
/// only when the person hands it in, which is why this is a report and not a write-off.
model DamageReport {
  id         String    @id @default(cuid())
  facilityId String
  facility   Facility  @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  staffId    String
  staff      Staff     @relation(fields: [staffId], references: [id], onDelete: Cascade)
  issueId    String?
  issue      Issue?    @relation(fields: [issueId], references: [id], onDelete: SetNull)
  kind       String // Torn | Stained | Worn thin
  note       String    @default("")
  photoId    String?
  requestId  String? // the replacement, if they asked for one
  handedInAt DateTime?
  createdAt  DateTime  @default(now())

  @@index([facilityId])
  @@index([staffId])
}

/// "This isn't right" — someone saying the linen room's record of what they hold is wrong.
///
/// It needs its own model because it is the one thing a staff member can raise that has no order
/// behind it, and the product rule is one message thread per order. Rather than bend that rule
/// into a general inbox, a dispute is its own small object with its own queue on the linen-room
/// side. Nothing about the record changes until a coordinator agrees it should.
model RecordDispute {
  id         String       @id @default(cuid())
  facilityId String
  facility   Facility     @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  staffId    String
  staff      Staff        @relation(fields: [staffId], references: [id], onDelete: Cascade)
  itemId     String?
  item       CatalogItem? @relation(fields: [itemId], references: [id], onDelete: SetNull)
  sizeIndex  Int?
  body       String
  resolvedAt DateTime?
  resolvedBy String       @default("")
  createdAt  DateTime     @default(now())

  @@index([facilityId, resolvedAt])
  @@index([staffId])
}

/// A short broadcast from the linen room, shown on every staff member's home screen. Not a
/// message — nobody replies to it, and it is not attached to an order.
model LinenNotice {
  id         String   @id @default(cuid())
  facilityId String
  facility   Facility @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  body       String
  startsAt   String   @default("")
  endsAt     String   @default("")
  createdAt  DateTime @default(now())

  @@index([facilityId])
}

/// A staff member's own read-only account.
///
/// Deliberately NOT a User. Coordinator sessions are checked by currentUser(), and a wearer who
/// could satisfy that check would be one missed role test away from the issuing screens, the
/// catalogue and the staff register. A separate model with a separate cookie means the answer is
/// structural rather than a condition someone has to remember: a staff account cannot become a
/// coordinator session, because it is not the same kind of thing.
model StaffAccount {
  id           String    @id @default(cuid())
  facilityId   String
  facility     Facility  @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  staffId      String    @unique
  staff        Staff     @relation(fields: [staffId], references: [id], onDelete: Cascade)
  email        String    @unique
  passwordHash String
  createdAt    DateTime  @default(now())
  lastSeenAt   DateTime?

  @@index([facilityId])
}

model CatalogItem {
  id         String   @id @default(cuid())
  facilityId String
  facility   Facility @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  sort       Int
  item       String
  gender     String   @default("Unisex")
  type       String   @default("") // garment type: Shirt, Pants, Jacket… drives the tops/pants split for nursing entitlement
  sku        String   @default("")
  supplier   String   @default("")
  cost       Float    @default(0)
  /// The staff groups this garment is for, as the facility names them. EMPTY MEANS EVERY GROUP.
  /// Compared ignoring case and outer spaces; ask through garmentForGroup() in lib/compute.
  groups     String[] @default([])
  notes      String   @default("")
  sizes      String[] @default([])
  archived   Boolean  @default(false)
  createdAt  DateTime @default(now())
  /// The organisation catalogue item this was published from, when it was. Plain string, no
  /// relation: a facility that leaves its organisation keeps the garment and loses the link.
  orgItemId  String?

  barcodes       Barcode[]
  stock          StockLevel[]
  moves          StockMove[]
  issues         Issue[]
  orderLines     OrderLine[]
  receiptLines   ReceiptLine[]
  pickupLines    PickupLine[]
  stocktakeLines StocktakeLine[]
  handinLines    HandInLine[]
  costs          CostChange[]
  requestLines   RequestLine[]
  waitlist       WaitlistEntry[]
  kitAnswers     KitCheckAnswer[]
  disputes       RecordDispute[]

  @@unique([facilityId, sort])
  @@index([facilityId])
}

model Barcode {
  id         String      @id @default(cuid())
  facilityId String
  facility   Facility    @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  code       String
  itemId     String
  item       CatalogItem @relation(fields: [itemId], references: [id], onDelete: Cascade)
  sizeIndex  Int
  source     String      @default("bound")

  @@unique([facilityId, code])
  @@index([itemId])
}

// Where a garment physically lives. A tree: rooms hold shelves, shelves hold bays.
// A variant has one home location (a placement, not a split of its quantity) — counting a
// location walks its descendants. Laundry and External exist so a garment that has left the
// shelf but not the building still has somewhere to be.
model Location {
  id         String     @id @default(cuid())
  facilityId String
  facility   Facility   @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  name       String
  kind       String     @default("Shelf") // Room | Shelf | Bay | Laundry | External
  parentId   String?
  parent     Location?  @relation("LocationTree", fields: [parentId], references: [id], onDelete: SetNull)
  children   Location[] @relation("LocationTree")
  sort       Int        @default(0)
  archived   Boolean    @default(false)
  createdAt  DateTime   @default(now())

  levels     StockLevel[]
  stocktakes Stocktake[]

  @@unique([facilityId, name])
  @@index([facilityId])
  @@index([parentId])
}

model StockLevel {
  id         String      @id @default(cuid())
  facilityId String
  facility   Facility    @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  itemId     String
  item       CatalogItem @relation(fields: [itemId], references: [id], onDelete: Cascade)
  sizeIndex  Int
  opening    Int         @default(0)
  adj        Int         @default(0)
  reorder    Int?
  preloved   Int         @default(0) // pre-loved pool for this size: handed-in / seconds, reissued free at $0
  locationId String?
  location   Location?   @relation(fields: [locationId], references: [id], onDelete: SetNull)

  @@unique([itemId, sizeIndex])
  @@index([locationId])
  @@index([facilityId])
}

model StockMove {
  id         String      @id @default(cuid())
  facilityId String
  facility   Facility    @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  date       String
  type       String
  itemId     String
  item       CatalogItem @relation(fields: [itemId], references: [id], onDelete: Cascade)
  sizeIndex  Int
  qty        Int
  reason     String      @default("")
  byName     String      @default("")
  createdAt  DateTime    @default(now())

  @@index([facilityId])
}

model Department {
  id         String   @id @default(cuid())
  facilityId String
  facility   Facility @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  name       String
  cc         String   @default("")
  sort       Int      @default(0)

  @@unique([facilityId, name])
}

model Staff {
  id         String   @id @default(cuid())
  facilityId String
  facility   Facility @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  num        String
  first      String
  last       String
  phone      String   @default("")
  group      String   @default("")
  dept       String   @default("")
  top        String   @default("")
  pants      String   @default("")
  /// Which cut of uniform this person is offered: "Men's", "Women's", "Either" (both), or "" when
  /// nobody has said yet. Named for what it decides — which garments the counter and the staff app
  /// offer — and not for anybody's gender: a woman who wears the men's cut is set to Men's and
  /// nobody has to argue about the label.
  ///
  /// BLANK MEANS EVERY STYLE, exactly as "Either" does, and blank is what every record starts as, so
  /// nothing changes for anybody until a coordinator sets it. The two are kept apart in storage
  /// only so the register can list who nobody has decided yet. Ask through garmentForStyle() in
  /// lib/compute; normalUniformStyle() is what turns a CSV cell or an old label into one of these.
  uniformStyle String @default("")
  ccOverride String   @default("")
  inactive   Boolean  @default(false)
  ent        Int?
  /// Combined FTE as the order form writes it — "1.0" down to "0.1", or "Casual". A string, and the
  /// same shape as Approval.fte, because Casual is not a number and rounding it to one loses the
  /// discretion the form deliberately gives the manager. Blank on every existing row, and blank has to
  /// go on behaving as it does today: the table then proposes nothing at all, rather than proposing
  /// a kit of nought.
  fte        String   @default("")
  start      String   @default("")
  notes      String   @default("")
  createdAt  DateTime @default(now())

  /// The one-time code a staff member types to claim their own read-only account. Globally unique
  /// because it is presented before we know which facility they belong to — the code alone has to
  /// identify them. Cleared once used, and stale once activateCodeAt is old enough, so a printed
  /// slip left on a desk stops working whether or not anyone ever claimed it.
  activateCode   String?       @unique
  /// When that code was printed. A slip is a bearer token on paper: whoever holds it can set an
  /// e-mail and password on this record, so it has to go stale on its own rather than only when
  /// somebody remembers to cancel it. Also what lets the register say how old an outstanding code
  /// is instead of just that there is one.
  activateCodeAt DateTime?
  account        StaffAccount?

  /// The one named person who approves this staff member's requests. Not "any manager on the
  /// ward" and not a rota — a request with no manager has no addressee and cannot be raised, so
  /// the linen room has to set this before self-service is any use to them.
  managerId String?
  manager   Staff?  @relation("StaffManager", fields: [managerId], references: [id], onDelete: SetNull)
  reports   Staff[] @relation("StaffManager")

  /// Ward clerks sign for the bags the round drops at their ward. Scoped to that ward — a flag,
  /// not a role, because the person on the desk changes and the register is where that is already
  /// tracked.
  wardDesk Boolean @default(false)

  requests       Request[]        @relation("RequestSubject")
  raisedRequests Request[]        @relation("RequestRaisedByStaff")
  waitlist       WaitlistEntry[]
  kitAnswers     KitCheckAnswer[]
  damageReports  DamageReport[]

  issues         Issue[]
  orders         Order[]
  pickups        Pickup[]
  /// Approvals recorded ABOUT this person — their own signed order forms.
  approvals      Approval[]      @relation("ApprovalSubject")
  /// Approvals this person signed FOR somebody else. Empty for everyone who has never approved
  /// anything, and empty too for an approval whose approver was typed rather than picked out of
  /// the register.
  approvalsGiven Approval[]      @relation("ApprovalApprover")
  alterations    Alteration[]
  handins        HandIn[]
  disputes       RecordDispute[]

  @@unique([facilityId, num])
}

model Issue {
  id            String      @id @default(cuid())
  facilityId    String
  facility      Facility    @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  date          String
  staffId       String
  staff         Staff       @relation(fields: [staffId], references: [id], onDelete: Cascade)
  itemId        String
  item          CatalogItem @relation(fields: [itemId], references: [id], onDelete: Cascade)
  sizeIndex     Int
  qty           Int
  cond          String      @default("New")
  cost          Float       @default(0) // unit cost at the time of issue — reports never re-price history
  orderCode     String      @default("")
  receipt       Boolean     @default(false)
  returnedDate  String?
  returnedCond  String?
  override      Boolean     @default(false)
  /// Issued outside the person's staff group on the coordinator's override. Kept apart from
  /// `override`, which is the six-set ceiling's, so the record can tell the two apart.
  offGroup      Boolean     @default(false)
  /// Issued outside the person's uniform style on the coordinator's override — a men's cut to
  /// somebody set to Women's, or the other way about. Its own flag beside offGroup and `override`
  /// so the record says which rule was overridden, not merely that one was.
  offStyle      Boolean     @default(false)
  direct        Boolean     @default(false)
  preloved      Boolean     @default(false) // issued free from the pre-loved pool: no cost, entitlement, approval or ledger effect
  handedIn      String? // date the garment came back via a hand-in (informational)
  returnPhotoId String? // damage evidence photo attached to a return
  createdAt     DateTime    @default(now())

  damageReports DamageReport[]

  @@index([facilityId, date])
  @@index([staffId])
}

model Order {
  id         String   @id @default(cuid())
  facilityId String
  facility   Facility @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  code       String
  date       String
  source     String   @default("Supplier Order")
  orderFor   String   @default("Stock")
  staffId    String?
  staff      Staff?   @relation(fields: [staffId], references: [id], onDelete: SetNull)
  supplier   String   @default("")
  status     String   @default("Draft")
  ref        String   @default("")
  invoice    String   @default("")
  tracking   String   @default("")
  expected   String   @default("")
  received   String   @default("")
  cc         String   @default("")
  notes      String   @default("")
  replenish  Boolean  @default(false)
  parentId   String? // back orders point at the order they were split from
  parent     Order?   @relation("BackOrder", fields: [parentId], references: [id], onDelete: SetNull)
  backOrders Order[]  @relation("BackOrder")
  createdAt  DateTime @default(now())
  updatedAt  DateTime @updatedAt

  lines    OrderLine[]
  receipts Receipt[]
  pickups  Pickup[]

  @@unique([facilityId, code])
  @@index([facilityId])
}

model OrderLine {
  id      String      @id @default(cuid())
  orderId String
  order   Order       @relation(fields: [orderId], references: [id], onDelete: Cascade)
  itemId  String
  item    CatalogItem @relation(fields: [itemId], references: [id], onDelete: Cascade)
  size    String
  qty     Int
  sort    Int         @default(0)

  @@index([orderId])
}

model Receipt {
  id        String   @id @default(cuid())
  orderId   String
  order     Order    @relation(fields: [orderId], references: [id], onDelete: Cascade)
  date      String
  invoice   String   @default("")
  note      String   @default("")
  photoId   String? // photo of the supplier invoice
  createdAt DateTime @default(now())

  lines ReceiptLine[]

  @@index([orderId])
}

model ReceiptLine {
  id        String      @id @default(cuid())
  receiptId String
  receipt   Receipt     @relation(fields: [receiptId], references: [id], onDelete: Cascade)
  itemId    String
  item      CatalogItem @relation(fields: [itemId], references: [id], onDelete: Cascade)
  size      String
  qty       Int
  dest      String      @default("shelf")
  cost      Float       @default(0)

  @@index([receiptId])
}

model Pickup {
  id             String   @id @default(cuid())
  facilityId     String
  facility       Facility @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  orderId        String
  order          Order    @relation(fields: [orderId], references: [id], onDelete: Cascade)
  staffId        String
  staff          Staff    @relation(fields: [staffId], references: [id], onDelete: Cascade)
  received       String
  contacted      Boolean  @default(false)
  pickedUp       String?
  deliveredTo    String   @default("") // delivery-round proof: who signed for it
  sigId          String? // signature PNG (Photo)
  proofId        String? // handover photo (Photo)
  deliveredRound Boolean  @default(false)
  createdAt      DateTime @default(now())

  lines PickupLine[]

  @@index([facilityId])
}

model PickupLine {
  id       String      @id @default(cuid())
  pickupId String
  pickup   Pickup      @relation(fields: [pickupId], references: [id], onDelete: Cascade)
  itemId   String
  item     CatalogItem @relation(fields: [itemId], references: [id], onDelete: Cascade)
  size     String
  qty      Int

  @@index([pickupId])
}

model Stocktake {
  id         String    @id @default(cuid())
  facilityId String
  facility   Facility  @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  date       String
  byName     String
  counted    Int
  variances  Int
  mode       String    @default("shelf") // shelf | preloved
  locationId String? // the location this count was scoped to; null = the whole linen room
  location   Location? @relation(fields: [locationId], references: [id], onDelete: SetNull)
  createdAt  DateTime  @default(now())

  lines StocktakeLine[]

  @@index([facilityId])
}

model StocktakeLine {
  id          String      @id @default(cuid())
  stocktakeId String
  stocktake   Stocktake   @relation(fields: [stocktakeId], references: [id], onDelete: Cascade)
  itemId      String
  item        CatalogItem @relation(fields: [itemId], references: [id], onDelete: Cascade)
  sizeIndex   Int
  sys         Int
  counted     Int
  reason      String      @default("") // why the gap: At laundry | Condemned | Missing | Other

  @@index([stocktakeId])
}

// Uniform hand-ins: good garments join the pre-loved pool, rags are tallied for disposal.
model HandIn {
  id         String   @id @default(cuid())
  facilityId String
  facility   Facility @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  date       String
  staffId    String
  staff      Staff    @relation(fields: [staffId], references: [id], onDelete: Cascade)
  byName     String
  credit     Boolean  @default(false) // coordinator chose to credit the staff member's allowance
  createdAt  DateTime @default(now())

  lines HandInLine[]

  @@index([facilityId])
  @@index([staffId])
}

model HandInLine {
  id        String      @id @default(cuid())
  handInId  String
  handIn    HandIn      @relation(fields: [handInId], references: [id], onDelete: Cascade)
  itemId    String
  item      CatalogItem @relation(fields: [itemId], references: [id], onDelete: Cascade)
  sizeIndex Int
  qty       Int
  cond      String      @default("Good") // Good | Rag
  laundered Boolean     @default(true)
  credited  Int         @default(0) // qty that earned allowance credit (matched a real, un-returned shelf issue)

  @@index([handInId])
}

// Camera captures and signatures, stored server-side (JPEG/PNG data URLs, downscaled on the device to <= 900px).
// Only ids travel in the snapshot; the bytes are served by /api/photo/[id].
/// A signature or a photograph.
///
/// `data` used to hold the whole image as a base64 data URL, which put every picture in the
/// database and therefore in every dump. Images now live on disk and this row keeps only a
/// pointer. `data` stays for rows written before the move — they are read from it and rewritten to
/// disk by scripts/photos-to-disk.cjs — and is empty for everything new.
model Photo {
  id         String   @id @default(cuid())
  facilityId String
  facility   Facility @relation(fields: [facilityId], references: [id], onDelete: Cascade)
  kind       String // approval | receipt | return | sig | proof
  data       String   @default("")
  path       String   @default("")
  mime       String   @default("")
  bytes      Int      @default(0)
  createdAt  DateTime @default(now())

  @@index([facilityId])
}

/// Messages from the public contact form. Not tied to a Facility — the sender usually has no account
/// yet. Read from the server; nothing in the app exposes these to a facility.
model ContactMessage {
  id        String   @id @default(cuid())
  name      String
  role      String   @default("")
  facility  String   @default("")
  email     String
  topic     String   @default("")
  slot      String   @default("")
  message   String
  ip        String   @default("")
  emailed   Boolean  @default(false)
  handled   Boolean  @default(false)
  createdAt DateTime @default(now())

  @@index([createdAt])
}