// testbench.cpp
#include <stdlib.h>
#include <iostream>
#include <verilated_vcd_c.h>
#include <verilated.h>
#include "Vtop.h"

#define MAX_SIM 100000
int main(int argc, char** argv) {
    // Initialize Verilator
    // Instantiate the design
    Vtop* dut = new Vtop;
    Verilated::commandArgs(argc, argv);
    Verilated::traceEverOn(true);

    VerilatedVcdC *m_trace = new VerilatedVcdC;
    dut->trace(m_trace, 5);
    m_trace->open("waveform.vcd");

    // Initialize inputs
    dut->sysclk = 0;
    dut->sys_rst_n = 1;

    // Simulation loop
    for (int cycle = 0; cycle < MAX_SIM; cycle++) {
        dut->sysclk ^= 1;
        dut->miso ^= 1;
        dut->eval();
        m_trace->dump(cycle);

        // Read and display outputs
        // printf("Cycle %3d: led = %3d\n", cycle, dut->counter);
    }

    // Cleanup
    m_trace->close();
    delete dut;
    return 0;
}