/* charles.c
 *
 * Entry point for Charles, including main().
 *
 * Eryn Wells <eryn@erynwells.me>
 */

#include <cstdio>
#include <unistd.h>

#include "basics.h"
#include "light.h"
#include "material.h"
#include "object_sphere.h"
#include "object_plane.h"
#include "reader_yaml.hh"
#include "scene.h"
#include "writer_png.h"


static void
usage(const char *progname)
{
    fprintf(stderr, "Usage: %s [-hv] [-o <outfile>] <infile ...>\n", progname);
}


int
main(int argc,
     const char *argv[])
{
    Scene scene = Scene();

#if 0
    scene.get_ambient().set_intensity(1.0);

    Material *m1 = new Material();
    m1->set_diffuse_color(Color::Red);
    Material *m2 = new Material();
    m2->set_diffuse_color(Color::Green);
    Material *m3 = new Material();
    m3->set_diffuse_color(Color::Blue);
    Material *m4 = new Material();
    m4->set_diffuse_color(Color(1.0, 0.0, 1.0));

    // Make some spheres.
    Sphere *s1 = new Sphere(Vector3(233, 290, 0), 80.0);
    Sphere *s2 = new Sphere(Vector3(407, 290, 0), 80.0);
    Sphere *s3 = new Sphere(Vector3(320, 140, 0), 80.0);
    Sphere *s4 = new Sphere(Vector3(620, 360, 0), 20.0);
    s1->set_material(m1);
    s2->set_material(m2);
    s3->set_material(m3);
    s4->set_material(m4);
    scene.add_shape(s1);
    scene.add_shape(s2);
    scene.add_shape(s3);
    scene.add_shape(s4);

    // Make a plane
    /*
    Plane *p1 = new Plane(Vector3(0, 460, 400), Vector3(0, 1, 0.01));
    p1->set_material(m1);
    scene.add_shape(p1);
    */

    PointLight *l1 = new PointLight(Vector3(0.0, 240.0, 100.0), Color::White, 1.0);
    scene.add_light(l1);

    // Render.
    scene.render();

    Writer *writer = new PNGWriter();
    scene.write(*writer, OUT_FILE);
#endif

    std::string outfile, infile;

    int opt;
    while ((opt = getopt(argc, (char *const *)argv, "ho:v")) != -1) {
        switch (opt) {
            case 'h':
                usage(argv[0]);
                break;
            case 'o':
                outfile = optarg;
                break;
            case 'v':
                /* TODO: Verbosity levels. */
                break;
        }
    }

    if (optind >= argc) {
        fprintf(stderr, "Input file required.\n");
        usage(argv[0]);
        return -1;
    }

    infile = argv[optind];

    /* Parse YAML files. */
    YAMLReader reader(scene);
    for (int i = optind; i < argc; i++) {
        reader.read_file(infile);
    }
    /* TODO: Call tracer. */
    /* TODO: Write rendered scene to PNG file. */

    return 0;
}