/**
 * @file FTCS_2D_proto_closed_mdl.cpp
 * @author Hannes Signer, Philipp Ungrund, MDL
 * @brief Creates a TUG simulation in 2D with FTCS approach and closed boundary condition; optional command line argument: number of cols and rows
 * 
 */

#include <cstdlib>
#include <iostream>
#include <tug/Simulation.hpp>

int main(int argc, char *argv[]) {

    int row = 64;

    if (argc == 2) {
	// no cmd line argument, take col=row=64
	row = atoi(argv[1]);
    }
    int col=row;

    std::cout << "Nrow =" << row << std::endl;
    // **************
    // **** GRID ****
    // **************

    // create a grid with a 20 x 20 field
    int n2 = row/2-1;
    Grid grid = Grid(row,col);

    // (optional) set the domain, e.g.:
    // grid.setDomain(20, 20);

    // (optional) set the concentrations, e.g.:
    // MatrixXd concentrations = MatrixXd::Constant(20,20,1000); // #row,#col,value
    MatrixXd concentrations = MatrixXd::Constant(row,col,0);
    concentrations(n2,n2) = 1;
    concentrations(n2,n2+1) = 1;
    concentrations(n2+1,n2) = 1;
    concentrations(n2+1,n2+1) = 1;
    grid.setConcentrations(concentrations);

    // (optional) set alphas of the grid, e.g.:
    MatrixXd alphax = MatrixXd::Constant(row, col, 1E-4); // row,col,value
    MatrixXd alphay = MatrixXd::Constant(row, col, 1E-6); // row,col,value
    grid.setAlpha(alphax, alphay);


    // ******************
    // **** BOUNDARY ****
    // ******************

    // create a boundary with constant values
    Boundary bc = Boundary(grid);

    // (optional) set boundary condition values for one side, e.g.:
    bc.setBoundarySideClosed(BC_SIDE_LEFT); // side,values
    bc.setBoundarySideClosed(BC_SIDE_RIGHT);
    bc.setBoundarySideClosed(BC_SIDE_TOP);
    bc.setBoundarySideClosed(BC_SIDE_BOTTOM);


    // ************************
    // **** SIMULATION ENV ****
    // ************************

    // set up a simulation environment
    Simulation simulation = Simulation(grid, bc, FTCS_APPROACH); // grid,boundary,simulation-approach

    // set the timestep of the simulation
    simulation.setTimestep(10000); // timestep

    // set the number of iterations
    simulation.setIterations(100);

    // (optional) set kind of output [CSV_OUTPUT_OFF (default), CSV_OUTPUT_ON, CSV_OUTPUT_VERBOSE]
    simulation.setOutputCSV(CSV_OUTPUT_VERBOSE);
    
    // **** RUN SIMULATION ****

    // run the simulation
    simulation.run();

    return 0;
}