#include <Eigen/Eigen>
#include <tug/Simulation.hpp>
#include <chrono>
#include <iostream>

using namespace Eigen;
using namespace tug;
using namespace std::chrono;

int main(int argc, char *argv[])
{
    // **** GRID ****
    int rows = 500;
    int cols = 500;
    Grid64 grid(rows, cols);

    MatrixXd concentrations = MatrixXd::Constant(rows, cols, 0);
    concentrations.block(50, 50, 100, 100) = MatrixXd::Constant(100, 100, 1500);
    concentrations.block(350, 350, 100, 100) = MatrixXd::Constant(100, 100, 1200);
    concentrations(250, 250) = 2000;
    grid.setConcentrations(concentrations);

    MatrixXd alphax = MatrixXd::Constant(rows, cols, 0.7);
    MatrixXd alphay = MatrixXd::Constant(rows, cols, 0.7);
    alphax.block(200, 200, 100, 100) = MatrixXd::Constant(100, 100, 0.4);
    alphay.block(200, 200, 100, 100) = MatrixXd::Constant(100, 100, 0.4);
    grid.setAlpha(alphax, alphay);

    // **** BOUNDARY ****
    Boundary bc = Boundary(grid);
    bc.setBoundarySideClosed(BC_SIDE_LEFT);
    bc.setBoundarySideClosed(BC_SIDE_RIGHT);
    bc.setBoundarySideClosed(BC_SIDE_TOP);
    bc.setBoundarySideClosed(BC_SIDE_BOTTOM);

    // **** SIMULATION ****
    Simulation simulation = Simulation<double, tug::FTCS_APPROACH>(grid, bc);
    simulation.setTimestep(2.5);
    simulation.setIterations(300);
    simulation.setOutputCSV(CSV_OUTPUT_ON);
    simulation.setOutputConsole(CONSOLE_OUTPUT_OFF);

    // **** RUN SIMULATION ****
    auto start = high_resolution_clock::now();
    simulation.run();
    auto stop = high_resolution_clock::now();

    auto duration = duration_cast<nanoseconds>(stop - start);
    std::cout << "Simulation Time (nanoseconds): " << duration.count() << std::endl;
}