#include <iostream>
#include <vector>
#include <chrono>
#include <cstdlib> // rand()
#include <ctime>   // time()
#include <windows.h>

// === Parameters ===
//const int BPM_MIN = 50;
//const int BPM_MAX = 120;
const int SAMPLE_INTERVAL_MS = 1000; // Sampling every 10 ms
const int THRESHOLD_CARDIAC_ARREST = 2;         
//const int NOISE_LEVEL = 100;       // Simulated noise level


// === Initialize random generator ===// === Simulate heart signal from sensor ===
int generateRandomHeartRate() {
    //int bpm = 30 + rand() % 111; // génère un BPM entre 30 et 140
    int bpm = rand() % 141;  //  génère un BPM entre 0 et 140
    return bpm;
}

// === Simulate buzzer activation ===
void activerBuzzer() {
    std::cout << " Buzzer active (ALERTE CARDIAQUE)!" << std::endl;
}

// === Simulate vibration motor activation ===
void activerVibreur() {
    std::cout << " Vibreur active (ALERTE CARDIAQUE)!" << std::endl;
}

// === Simulate Bluetooth transmission ===
void envoyerMessageBluetooth(bool urgence) {
    std::cout << " Message Bluetooth envoye: " << (urgence ? "TRUE (urgence)" : "FALSE (normal)") << std::endl;
}

// === Main program ===
int main() {

    bool battementDetecte = false;
    auto dernierBattement = std::chrono::steady_clock::now();

    std::cout << " Demarrage de la simulation du capteur cardiaque...\n";
    int i=0;
    int lastBPM;

    while (true) {
        //int signal = simulerSignalCardiaque();
        //std::cout << "Signal: " << signal << std::endl; // verify the signal detected

        // Détection de battement
        if (!battementDetecte) { //signal > THRESHOLD &&
            auto maintenant = std::chrono::steady_clock::now();
            auto intervalle = std::chrono::duration_cast<std::chrono::milliseconds>(maintenant - dernierBattement).count();
            
            int bpm = generateRandomHeartRate();
            std::cout << " BPM mesure : " << bpm;

            if (bpm < 55 && bpm > 40){
                std::cout << " [BRADYCARDIA]"  << std::endl;
                activerVibreur();
            } else if(bpm < 140 && bpm > 110) {
                std::cout << " [TACHYCARDIA]"  << std::endl;
                activerVibreur();
            }else if(bpm < 110 && bpm > 55){
                std::cout << " [NORMAL]" << std::endl;
                envoyerMessageBluetooth(false);
            } else if (bpm < 40){
                if (i>THRESHOLD_CARDIAC_ARREST && lastBPM < 40){
                    i=0;
                    std::cout << " [CARDIAC ARREST]" << std::endl;
                    activerBuzzer();
                    activerVibreur();
                    envoyerMessageBluetooth(true);
                }else{
                    i+=1;
                }  
            }   
            std::cout << std::endl;

            dernierBattement = maintenant;
            battementDetecte = true;
            lastBPM =bpm;
            std::cout << lastBPM << std::endl;

        }else {
            battementDetecte = false;// Prêt pour détecter le prochain battement
        }

        Sleep(SAMPLE_INTERVAL_MS);  // expects milliseconds
    }

    return 0;
}