#ifndef CPU_MONITOR_H
#define CPU_MONITOR_H

#include <string>
#include <vector>
#include <cstdint>

struct CpuStats {
    double totalUsagePercent;  // Overall CPU usage (0-100%)
    std::vector<double> coreUsagePercent;  // Per-core usage
};

class CpuMonitor {
public:
    explicit CpuMonitor();
    
    // Get overall CPU usage and per-core usage
    CpuStats getCpuUsage();

private:
    struct CpuTick {
        int64_t user;
        int64_t nice;
        int64_t system;
        int64_t idle;
        int64_t iowait;
        int64_t irq;
        int64_t softirq;
    };
    
    struct CpuCoreState {
        CpuTick previous;
        CpuTick current;
        bool initialized;
    };
    
    std::vector<CpuCoreState> coreStates;  // Index 0 is aggregate, 1+ are cores
    
    std::vector<CpuTick> readCpuStats();
    double calculateUsagePercent(const CpuTick &prev, const CpuTick &curr);
    int getNumberOfCores();
};

#endif // CPU_MONITOR_H