// FieldOps — initial scaffold schema.
//
// All models except Tenant carry tenantId. Tenant scoping is enforced at runtime
// by the Prisma extension in src/tenant-extension.ts — see that file's header for
// the operations it covers and (more importantly) those it does NOT.

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

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

enum UserRole {
  ADMIN
  SUPERVISOR
  QUALITY
  OPERATOR
}

enum MaintenanceRequestStatus {
  OPEN
  CLAIMED
  RESOLVED
}

enum QualityDefectStatus {
  OPEN
  ACKNOWLEDGED
  CORRECTED
}

model Tenant {
  id        String   @id @default(cuid())
  name      String
  createdAt DateTime @default(now())

  users               User[]
  workstations        Workstation[]
  events              DomainEvent[]
  maintenanceRequests MaintenanceRequest[]
  operatorSessions    OperatorSession[]
  qualityDefects      QualityDefect[]
}

model User {
  id             String    @id @default(cuid())
  tenantId       String
  email          String
  passwordHash   String?
  role           UserRole  @default(OPERATOR)
  createdAt      DateTime  @default(now())
  failedAttempts Int       @default(0)
  lockedUntil    DateTime?

  tenant Tenant @relation(fields: [tenantId], references: [id], onDelete: Cascade)

  reportedRequests MaintenanceRequest[] @relation("reported")
  claimedRequests  MaintenanceRequest[] @relation("claimed")
  resolvedRequests MaintenanceRequest[] @relation("resolved")

  sessions            OperatorSession[]
  createdDefects      QualityDefect[]   @relation("defectCreated")
  acknowledgedDefects QualityDefect[]   @relation("defectAcknowledged")
  correctedDefects    QualityDefect[]   @relation("defectCorrected")

  @@unique([tenantId, email])
  @@index([tenantId])
}

model Workstation {
  id       String @id @default(cuid())
  tenantId String
  code     String
  name     String
  area     String

  tenant              Tenant               @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  maintenanceRequests MaintenanceRequest[]
  operatorSessions    OperatorSession[]
  qualityDefects      QualityDefect[]

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

model DomainEvent {
  id            String    @id @default(cuid())
  tenantId      String
  aggregateType String
  aggregateId   String
  eventType     String
  payload       Json
  occurredAt    DateTime  @default(now())
  processedAt   DateTime?

  tenant Tenant @relation(fields: [tenantId], references: [id], onDelete: Cascade)

  @@index([tenantId])
  @@index([tenantId, processedAt])
  @@index([tenantId, aggregateType, aggregateId])
}

model MaintenanceRequest {
  id               String                   @id @default(cuid())
  tenantId         String
  workstationId    String
  reportedByUserId String
  description      String
  photoKey         String?
  status           MaintenanceRequestStatus @default(OPEN)
  clientRequestId  String
  createdAt        DateTime                 @default(now())

  claimedByUserId String?
  claimedAt       DateTime?

  resolvedByUserId String?
  resolvedAt       DateTime?
  resolutionNote   String?

  tenant      Tenant      @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  workstation Workstation @relation(fields: [workstationId], references: [id])
  reportedBy  User        @relation("reported", fields: [reportedByUserId], references: [id])
  claimedBy   User?       @relation("claimed", fields: [claimedByUserId], references: [id])
  resolvedBy  User?       @relation("resolved", fields: [resolvedByUserId], references: [id])

  @@unique([tenantId, clientRequestId])
  @@index([tenantId, status, createdAt])
  @@index([tenantId, reportedByUserId])
}

/// MY QUALITY — an operator's active binding to a workstation ("badge-in").
/// At most one active session (endedAt == null) per user; starting a new one
/// ends the previous. Quality defects route to whoever has the active session
/// at the targeted workstation.
model OperatorSession {
  id            String    @id @default(cuid())
  tenantId      String
  userId        String
  workstationId String
  startedAt     DateTime  @default(now())
  endedAt       DateTime?

  tenant      Tenant      @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  user        User        @relation(fields: [userId], references: [id])
  workstation Workstation @relation(fields: [workstationId], references: [id])

  @@index([tenantId])
  @@index([tenantId, userId, endedAt])
  @@index([tenantId, workstationId, endedAt])
}

/// MY QUALITY — a quality defect raised by QCP against a workstation, routed to
/// the operator currently bound there. Mirrors MaintenanceRequest but in the
/// opposite direction (quality -> operator). State: OPEN -> ACKNOWLEDGED ->
/// CORRECTED.
model QualityDefect {
  id              String              @id @default(cuid())
  tenantId        String
  workstationId   String
  createdByUserId String
  defectType      String
  location        String?
  description     String
  rfsCode         String?
  photoKey        String?
  status          QualityDefectStatus @default(OPEN)
  createdAt       DateTime            @default(now())

  acknowledgedByUserId String?
  acknowledgedAt       DateTime?

  correctedByUserId String?
  correctedAt       DateTime?
  correctionNote    String?

  tenant         Tenant      @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  workstation    Workstation @relation(fields: [workstationId], references: [id])
  createdBy      User        @relation("defectCreated", fields: [createdByUserId], references: [id])
  acknowledgedBy User?       @relation("defectAcknowledged", fields: [acknowledgedByUserId], references: [id])
  correctedBy    User?       @relation("defectCorrected", fields: [correctedByUserId], references: [id])

  @@index([tenantId, status, createdAt])
  @@index([tenantId, workstationId, status])
}