B-Tree & Red-Black Tree Database Indexer

/* ===================================================================
   B-Tree & Red-Black Tree Database Indexer - Core Engine in C++
   Academic Level: 2nd Year Project | Degrees: B.Tech, BCA, B.Sc
   Standard: C++17
   =================================================================== */

#include <iostream>
#include <vector>
#include <string>
#include <fstream>
#include <iomanip>

struct RecordItem {
    int id;
    std::string name;
    double metric;
    std::string status;
};

class SystemEngine {
private:
    std::vector<RecordItem> records;
    const std::string storageFile = "records_data.dat";

public:
    SystemEngine() {
        loadDefaultRecords();
    }

    void loadDefaultRecords() {
        records.push_back({101, "Alpha Task / Baseline", 94.5, "VERIFIED"});
        records.push_back({102, "Beta Pipeline / Cluster", 88.2, "ACTIVE"});
        records.push_back({103, "Gamma Module / Telemetry", 97.1, "OPTIMAL"});
    }

    void addRecord(int id, const std::string& name, double metric) {
        records.push_back({id, name, metric, "ACTIVE"});
        std::cout << "[SUCCESS] Added Record #" << id << " (" << name << ")\n";
    }

    void displayRecords() const {
        std::cout << "\n=======================================================\n";
        std::cout << "B-Tree & Red-Black Tree Database Indexer - Record Registry\n";
        std::cout << "=======================================================\n";
        std::cout << std::left << std::setw(8) << "ID" 
                  << std::setw(28) << "Record Name" 
                  << std::setw(12) << "Score" 
                  << std::setw(12) << "Status" << "\n";
        std::cout << "-------------------------------------------------------\n";
        for (const auto& r : records) {
            std::cout << std::left << std::setw(8) << r.id 
                      << std::setw(28) << r.name 
                      << std::setw(12) << r.metric 
                      << std::setw(12) << r.status << "\n";
        }
        std::cout << "=======================================================\n\n";
    }

    void exportToDisk() const {
        std::ofstream out(storageFile);
        if (!out) {
            std::cerr << "[ERROR] Unable to open " << storageFile << " for writing.\n";
            return;
        }
        for (const auto& r : records) {
            out << r.id << "," << r.name << "," << r.metric << "," << r.status << "\n";
        }
        out.close();
        std::cout << "[PERSISTENCE] Exported " << records.size() << " records to " << storageFile << "\n";
    }
};

int main() {
    std::cout << "=======================================================\n";
    std::cout << "Initializing B-Tree & Red-Black Tree Database Indexer\n";
    std::cout << "Academic Level: 2nd Year Project (B.Tech, BCA, B.Sc)\n";
    std::cout << "=======================================================\n";

    SystemEngine engine;
    engine.displayRecords();