const (
    DefaultHost = "127.0.0.1"
    DefaultPort = "8080"
)

type Option func(c *Client)

type Client struct {
    Host string
    Port string
}

func NewClient(options ...Option) *Client {
    c := &Client{
        Host: DefaultHost,
        Port: DefaultPort,
    }
    for _, option := range options {
        option(c)
    }
    return c
}

func WitchHost(host string) Option {
    return func(c *Client) {
        c.Host = host
    }
}