/*
 * Copyright (C) 2022 NHR@FAU, University Erlangen-Nuremberg.
 * All rights reserved. This file is part of nusif-solver.
 * Use of this source code is governed by a MIT style
 * license that can be found in the LICENSE file.
 */
#ifndef __SOLVER_H_
#define __SOLVER_H_

#include "grid.h"
#include "parameter.h"

enum OBJECTBOUNDARY {
    NONE = 0,
    /* Front Corners */
    FRONTTOPLEFTCORNER,
    FRONTTOPRIGHTCORNER,
    FRONTBOTTOMLEFTCORNER,
    FRONTBOTTOMRIGHTCORNER,
    /* Back Corners */
    BACKTOPLEFTCORNER,
    BACKTOPRIGHTCORNER,
    BACKBOTTOMLEFTCORNER,
    BACKBOTTOMRIGHTCORNER,
    /* Faces */
    FRONTFACE,
    BACKFACE,
    LEFTFACE,
    RIGHTFACE,
    TOPFACE,
    BOTTOMFACE,
    /* Front Lines remaining after Corners and Faces */
    FRONTLEFTLINE,
    FRONTRIGHTLINE,
    FRONTTOPLINE,
    FRONTBOTTOMLINE,
    /* Bottom Lines remaining after Corners and Faces */
    BACKLEFTLINE,
    BACKRIGHTLINE,
    BACKTOPLINE,
    BACKBOTTOMLINE,
    /* Mid Lines remaining after Corners and Faces */
    MIDTOPLEFTLINE,
    MIDTOPRIGHTLINE,
    MIDBOTTOMLEFTLINE,
    MIDBOTTOMRIGHTLINE,
    /* Local where its an object but not a boundary */
    LOCAL
};
enum BC { NOSLIP = 1, SLIP, OUTFLOW, PERIODIC };
/// @brief
enum SHAPE { NOSHAPE = 0, RECT, CIRCLE };

typedef struct {
    /* geometry and grid information */
    Grid grid;
    /* arrays */
    double *p, *rhs;
    double *f, *g, *h;
    double *u, *v, *w;
    int* seg;
    /* parameters */
    double eps, omega, rho;
    double re, tau, gamma;
    double gx, gy, gz;
    /* time stepping */
    int itermax;
    double dt, te;
    double dtBound;
    char* problem;
    int bcLeft, bcRight, bcBottom, bcTop, bcFront, bcBack;
} Solver;

extern void initSolver(Solver*, Parameter*);
extern void computeRHS(Solver*);
extern void solve(Solver*);
extern void solveRB(Solver*);
extern void solveRBA(Solver*);
extern void normalizePressure(Solver*);
extern void computeTimestep(Solver*);
extern void setBoundaryConditions(Solver*);
extern void setObjectBoundaryCondition(Solver*);
extern void setSpecialBoundaryCondition(Solver*);
extern void computeFG(Solver*);
extern void adaptUV(Solver*);
extern void writeResult(Solver*);
extern void printGrid(Solver*, int*);

#endif