@startuml
!theme plain
left to right direction
skinparam backgroundColor #FFFFFF
skinparam actorStyle awesome
skinparam linetype ortho

actor "Customer" as Customer
actor "Doctor" as Doctor
actor "Admin" as Admin

package "Pet Hospital System" {
  usecase "Register Account" as UC1
  usecase "Login" as UC2
  usecase "View Profile" as UC3
  usecase "Update Profile" as UC4
  
  usecase "View Pets" as UC5
  usecase "Add Pet" as UC6
  usecase "Update Pet Info" as UC7
  usecase "View Pet Records" as UC8
  
  usecase "Book Appointment" as UC9
  usecase "Cancel Appointment" as UC10
  usecase "View Appointments" as UC11
  
  usecase "View Prescriptions" as UC12
  usecase "View Medical Records" as UC13
  usecase "View Vaccination History" as UC14
  
  usecase "View Available Time Slots" as UC15
  usecase "Confirm Appointment" as UC16
  
  usecase "Manage Users" as UC17
  usecase "Manage Drugs" as UC18
  usecase "Manage Appointments" as UC19
  usecase "Generate Reports" as UC20
  
  usecase "Create Medical Record" as UC21
  usecase "Create Prescription" as UC22
  usecase "Add Vaccination Record" as UC23
  usecase "Perform Visit" as UC24
  
  usecase "View Statistics" as UC25
  usecase "View System Notices" as UC26
  usecase "Send Messages" as UC27
}

Customer --> UC1
Customer --> UC2
Customer --> UC3
Customer --> UC4
Customer --> UC5
Customer --> UC6
Customer --> UC7
Customer --> UC8
Customer --> UC9
Customer --> UC10
Customer --> UC11
Customer --> UC12
Customer --> UC13
Customer --> UC14
Customer --> UC15
Customer --> UC16
Customer --> UC26
Customer --> UC27

Doctor --> UC2
Doctor --> UC3
Doctor --> UC11
Doctor --> UC13
Doctor --> UC14
Doctor --> UC21
Doctor --> UC22
Doctor --> UC23
Doctor --> UC24
Doctor --> UC26
Doctor --> UC27

Admin --> UC17
Admin --> UC18
Admin --> UC19
Admin --> UC20
Admin --> UC25
Admin --> UC26

UC9 ..> UC15 : includes
UC21 ..> UC9 : extends
UC22 ..> UC21 : extends
UC24 ..> UC9 : extends

@enduml