From d0d42e10feed053d389b9098419d169208f19f50 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Mon, 18 Aug 2025 09:12:21 +0000
Subject: [PATCH] feat: Implement initial medical simulation

This commit introduces the initial framework for a medical simulation library.

It adds a `Patient` struct to hold vital signs, including:
- Blood Pressure (Systolic and Diastolic)
- Heart Rate
- Respiration Rate
- Body Temperature
- Oxygen Saturation

It also includes:
- An `initializePatient` function to create a patient with baseline healthy vitals.
- A placeholder `updatePatient` function for future simulation logic.
- An updated example to demonstrate the new functionality.
---
 examples/main.cpp               | 27 ++++++++++++++++++++++-----
 include/MedicalLib/MedicalLib.h | 27 +++++++++++++++++++++++++++
 src/MedicalLib.cpp              | 19 +++++++++++++++++++
 3 files changed, 68 insertions(+), 5 deletions(-)

diff --git a/examples/main.cpp b/examples/main.cpp
index cb20f66..34c0ad0 100644
--- a/examples/main.cpp
+++ b/examples/main.cpp
@@ -1,11 +1,28 @@
 #include <iostream>
 #include "MedicalLib/MedicalLib.h"
 
+void printPatientVitals(const Patient& patient) {
+    std::cout << "Patient ID: " << patient.patientId << std::endl;
+    std::cout << "  Blood Pressure: " << patient.bloodPressureSystolic << "/" << patient.bloodPressureDiastolic << " mmHg" << std::endl;
+    std::cout << "  Heart Rate: " << patient.heartRate << " bpm" << std::endl;
+    std::cout << "  Respiration Rate: " << patient.respirationRate << " breaths/min" << std::endl;
+    std::cout << "  Body Temperature: " << patient.bodyTemperature << " C" << std::endl;
+    std::cout << "  Oxygen Saturation: " << patient.oxygenSaturation << " %" << std::endl;
+}
+
 int main() {
-    double weight = 70.0; // kg
-    double height = 1.75; // meters
-    double bmi = calculateBMI(weight, height);
-    std::cout << "Weight: " << weight << " kg, Height: " << height << " m" << std::endl;
-    std::cout << "Calculated BMI: " << bmi << std::endl;
+    // Initialize a new patient
+    Patient patient = initializePatient(1);
+
+    std::cout << "Initial Vitals:" << std::endl;
+    printPatientVitals(patient);
+
+    // Simulate a time step
+    double deltaTime_s = 1.0;
+    updatePatient(patient, deltaTime_s);
+
+    std::cout << "\nVitals after " << deltaTime_s << " second(s):" << std::endl;
+    printPatientVitals(patient);
+
     return 0;
 }
diff --git a/include/MedicalLib/MedicalLib.h b/include/MedicalLib/MedicalLib.h
index e38ee05..3ade42c 100644
--- a/include/MedicalLib/MedicalLib.h
+++ b/include/MedicalLib/MedicalLib.h
@@ -1,5 +1,18 @@
 #pragma once
 
+/**
+ * @brief Holds all the vital signs and other medical information for a patient.
+ */
+struct Patient {
+    int patientId;
+    double bloodPressureSystolic;
+    double bloodPressureDiastolic;
+    double heartRate;
+    double respirationRate;
+    double bodyTemperature;
+    double oxygenSaturation;
+};
+
 // Define MEDICAL_LIB_EXPORT for exporting symbols from the DLL
 #if defined(_WIN32)
     #if defined(MEDICAL_LIB_EXPORT)
@@ -18,3 +31,17 @@
  * @return The calculated BMI.
  */
 MEDICAL_LIB_API double calculateBMI(double weight_kg, double height_m);
+
+/**
+ * @brief Initializes a new patient with baseline vital signs.
+ * @param patientId The ID for the new patient.
+ * @return A Patient struct with default healthy values.
+ */
+MEDICAL_LIB_API Patient initializePatient(int patientId);
+
+/**
+ * @brief Updates the patient's vital signs based on the time elapsed.
+ * @param patient The patient to update.
+ * @param deltaTime_s The time elapsed in seconds.
+ */
+MEDICAL_LIB_API void updatePatient(Patient& patient, double deltaTime_s);
diff --git a/src/MedicalLib.cpp b/src/MedicalLib.cpp
index 8adf398..b84fb7a 100644
--- a/src/MedicalLib.cpp
+++ b/src/MedicalLib.cpp
@@ -10,3 +10,22 @@ double calculateBMI(double weight_kg, double height_m) {
     }
     return weight_kg / (height_m * height_m);
 }
+
+Patient initializePatient(int patientId) {
+    Patient patient;
+    patient.patientId = patientId;
+    patient.bloodPressureSystolic = 120.0;
+    patient.bloodPressureDiastolic = 80.0;
+    patient.heartRate = 75.0;
+    patient.respirationRate = 16.0;
+    patient.bodyTemperature = 37.0;
+    patient.oxygenSaturation = 98.0;
+    return patient;
+}
+
+void updatePatient(Patient& patient, double deltaTime_s) {
+    // For this initial implementation, we will not change the patient's vitals.
+    // This function serves as a placeholder for future, more complex simulation logic.
+    (void)patient;
+    (void)deltaTime_s;
+}