/*
  Example:

  const stringFunctions = makeFunctional(String);

  stringFunctions.stringSlice('foo,moo,bar')(0)(3); //output 'foo'
*/

function createNamespace(className, property) {
    return className.toLowerCase()
        .concat(`${property.charAt(0).toUpperCase()}${property.slice(1)}`);
}

function curry(fn, maxArgs) {
    const max = maxArgs || fn.length;
    const exec = (...args) => {
        if (args.length >= max) {
            return fn.apply(null, args);
        }

        return exec.bind(null, ...args);
    };

    return exec;
}

function makeFunctional(classProvider) {
    const proto = classProvider.prototype;
    const propertyList = Object.getOwnPropertyNames(proto);
    const name = classProvider.name;

    return propertyList.reduce((fnMap, property) => {
        const value = proto[property];
        const namespace = createNamespace(name, property);

        if (!(value instanceof Function)) {
            return fnMap;
        }

        return Object.assign({}, fnMap, {
            [namespace]: curry(Function.prototype.call.bind(value), value.length + 1)
        });
    }, {});
}