// This is your Prisma schema file,
// learn more about it in the docs: https://pris.ly/d/prisma-schema

// Looking for ways to speed up your queries, or scale easily with your serverless or edge functions?
// Try Prisma Accelerate: https://pris.ly/cli/accelerate-init

generator client {
  provider = "prisma-client"
  output   = "../src/generated/prisma"
}

datasource db {
  provider = "postgresql"
}

enum UserRole {
  SYSTEM_ADMIN
  HOSPITAL_ADMIN
  DIRECTOR
  TEAM_LEAD
  DOCTOR
  ENGINEER
}

model Hospital {
  id                  Int                          @id @default(autoincrement())
  name                String
  code                String                       @unique
  departments         Department[]
  users               User[]
  patients            Patient[]
  engineerAssignments EngineerHospitalAssignment[]
  createdAt           DateTime                     @default(now())
  updatedAt           DateTime                     @default(now()) @updatedAt
}

model Department {
  id            Int            @id @default(autoincrement())
  name          String
  hospitalId    Int
  hospital      Hospital       @relation(fields: [hospitalId], references: [id], onDelete: Cascade)
  medicalGroups MedicalGroup[]
  users         User[]
  patients      Patient[]
  createdAt     DateTime       @default(now())
  updatedAt     DateTime       @default(now()) @updatedAt

  @@unique([hospitalId, name])
}

model MedicalGroup {
  id           Int        @id @default(autoincrement())
  name         String
  departmentId Int
  department   Department @relation(fields: [departmentId], references: [id], onDelete: Cascade)
  users        User[]
  patients     Patient[]
  createdAt    DateTime   @default(now())
  updatedAt    DateTime   @default(now()) @updatedAt

  @@unique([departmentId, name])
}

model User {
  id                        Int                          @id @default(autoincrement())
  email                     String                       @unique
  name                      String?
  role                      UserRole                     @default(DOCTOR)
  hospitalId                Int?
  departmentId              Int?
  medicalGroupId            Int?
  managerId                 Int?
  hospital                  Hospital?                    @relation(fields: [hospitalId], references: [id], onDelete: SetNull)
  department                Department?                  @relation(fields: [departmentId], references: [id], onDelete: SetNull)
  medicalGroup              MedicalGroup?                @relation(fields: [medicalGroupId], references: [id], onDelete: SetNull)
  manager                   User?                        @relation("UserHierarchy", fields: [managerId], references: [id], onDelete: SetNull)
  subordinates              User[]                       @relation("UserHierarchy")
  patients                  Patient[]                    @relation("DoctorPatients")
  engineerAssignments       EngineerHospitalAssignment[] @relation("EngineerAssignments")
  assignedEngineerHospitals EngineerHospitalAssignment[] @relation("SystemAdminAssignments")
  createdAt                 DateTime                     @default(now())
  updatedAt                 DateTime                     @default(now()) @updatedAt

  @@index([role])
  @@index([hospitalId])
  @@index([managerId])
}

model Patient {
  id             Int           @id @default(autoincrement())
  name           String
  hospitalId     Int
  departmentId   Int?
  medicalGroupId Int?
  doctorId       Int
  hospital       Hospital      @relation(fields: [hospitalId], references: [id], onDelete: Restrict)
  department     Department?   @relation(fields: [departmentId], references: [id], onDelete: SetNull)
  medicalGroup   MedicalGroup? @relation(fields: [medicalGroupId], references: [id], onDelete: SetNull)
  doctor         User          @relation("DoctorPatients", fields: [doctorId], references: [id], onDelete: Restrict)
  createdAt      DateTime      @default(now())
  updatedAt      DateTime      @default(now()) @updatedAt

  @@index([doctorId])
  @@index([hospitalId])
}

model EngineerHospitalAssignment {
  id           Int      @id @default(autoincrement())
  hospitalId   Int
  engineerId   Int
  assignedById Int
  hospital     Hospital @relation(fields: [hospitalId], references: [id], onDelete: Cascade)
  engineer     User     @relation("EngineerAssignments", fields: [engineerId], references: [id], onDelete: Restrict)
  assignedBy   User     @relation("SystemAdminAssignments", fields: [assignedById], references: [id], onDelete: Restrict)
  createdAt    DateTime @default(now())

  @@unique([hospitalId, engineerId])
  @@index([engineerId])
  @@index([assignedById])
}