#include <emscripten/bind.h>

// Bring Emscripten namespace into scope for the sake of readability
using namespace emscripten;

// Struct that is treated like a class in JS such that 'Point::x' => 'instance.x'
// is called a 'value_object'
// 'value_objects' are treated as dictionaries in JS. You can even define new structs this way
//
// For example: 'let x = {x: 44, y: 66}' => 'Point pt = Point {44, 66}'
struct Point
{
    int x;
    int y;
};

Point PointFactory(int x, int y)
{
    return Point {x, y};
}

int getX(Point pt)
{
    return pt.x;
}

EMSCRIPTEN_BINDINGS(Module)
{
    value_object<Point>("Point")   // <-- Register 'Point' as a value object such that
        .field("x", &Point::x)     //     'Point::x' => 'instance.x' &
        .field("y", &Point::y);    //     'Point::y' => 'instance.y'

    function("PointFactory", &PointFactory); // <-- Register method to return a new 'Point' struct instance

    function("getX", &getX);
}