Car Factory

function car(obj) {
    return obj = {
        model: obj.model,
        engine: {
            power: (() => {
                if (obj.power <= 90) {
                    return 90
                }
                else if (obj.power > 90 && obj.power <= 120) {
                    return 120
                }
                else {
                    return 200
                }
            })(),
            volume: (() => {
                if (obj.power <= 90) {
                    return 1800
                }
                else if (obj.power > 90 && obj.power <= 120) {
                    return 2400
                }
                else {
                    return 3500
                }
            })()
        },
        carriage: {
            type: obj.carriage,
            color: obj.color
        },
        wheels: (() => {
            if (obj.wheelsize % 2 !== 0) {
                return Array(4).fill(obj.wheelsize)
            }
            else {
                return Array(4).fill(2 * Math.floor(obj.wheelsize / 2) - 1)
            }
        })()
    }
}