#include <unistd.h>

#include <sys/video.h>

typedef struct {

} font_t;

void term_write_char(char c);
void render_char_at(char c, int x, int y);

int spawn_shell();

int ptys;
int ptym;

void* fb;
fb_info_t fb_info;

int terminal_col = 0;
int terminal_row = 0;

font_t* terminal_font = NULL;

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

    int vga_fd = open("/dev/vga");
    if (vga_fd == -1) return 1;

    int kbd_fd = open("/dev/kbd");
    if (kbd_fd == -1) return 1;

    int res = ioctl(vga_fd, FBIOGET_INFO, &fb_info);
    if (!res) {
        return 1;
    }

    mmap(vga_fd);

    // if (!spawn_shell()) {
    //     return 1;
    // }

    return 0;
}

void render_char_at(char c, int x, int y) {
    if (!terminal_font) return;
}

void term_write_char(char c) {

}

int spawn_shell() {
    ptym = pty(&ptys);

    if (fork() == 0) {
        close(ptym);
        dup2(ptys, 0);
        dup2(0, 1);
        dup2(0, 2);

        if (!exec("/usr/bin/rocksh")) return 0;
    }

    close(ptys);
    dup2(ptym, 0);
    dup2(0, 1);
    dup2(0, 2);
    return 1;
}