type Action struct {
    Type    string
    Payload string
    Label   string
}

type Button struct {
    Action  Action
    Color   string
}

type Buttons struct {
    Buttons []Button
}

func InitBByte(label string, payload []byte, color string) Button {

    b := Button{
        Action: Action{
            Type:    "text",
            Payload: string(payload),
            Label:   template.URLQueryEscaper(label),
        },
        Color: color,
    }
    return b
}


func Keyboard(chat float64, args ...Buttons) vk.H {

    var bs1 []Button
    var bs2 []Button
    var bs3 []Button
    var bs4 []Button

    for k, v := range args {
        if k == 0 {
            for _, b := range v.Buttons {
                bs1 = append(bs1, b)
            }
        }
        if k == 1 {
            for _, b := range v.Buttons {
                bs2 = append(bs2, b)
            }
        }
        if k == 2 {
            for _, b := range v.Buttons {
                bs3 = append(bs3, b)
            }
        }
        if k == 3 {
            for _, b := range v.Buttons {
                bs4 = append(bs4, b)
            }
        }
    }

    params := vk.H{}
    keb := vk.H{}
    if int(chat) > 2000000000 {
        keb["inline"] = true
    }

    keb["one_time"] = false
    if bs2 == nil {
        keb["buttons"] = []interface{}{bs1}
    } else if bs3 == nil {
        keb["buttons"] = []interface{}{bs1, bs2}
    } else if bs4 == nil {
        keb["buttons"] = []interface{}{bs1, bs2, bs3}
    } else {
        keb["buttons"] = []interface{}{bs1, bs2, bs3, bs4}
    }


    kbj, _ := json.Marshal(keb)

    params["keyboard"] = strings.ToLower(string(kbj))

    return params
}


func KbInline(one, two, three Buttons) vk.H {

    var bs1 []Button
    var bs2 []Button
    var bs3 []Button

    for _, b := range one.Buttons {
        bs1 = append(bs1, b)
    }

    for _, b := range two.Buttons {
        bs2 = append(bs2, b)
    }

    for _, b := range three.Buttons {
        bs3 = append(bs3, b)
    }


    params := vk.H{}
    kb := vk.H{}

    kb["inline"] = true
    if bs2 == nil {
        kb["buttons"] = []interface{}{one.Buttons}
    } else if bs3 == nil {
        kb["buttons"] = []interface{}{bs1, bs2}
    } else {
        kb["buttons"] = []interface{}{bs1, bs2, bs3}
    }

    kbj, _ := json.Marshal(kb)

    params["keyboard"] = strings.ToLower(string(kbj))

    return params
}



func Back(payload string) Buttons {
    s := InitBByte("Назад", []byte(`{"payload":"`+payload+`"}`), "secondary")
    params := Buttons{Buttons: []Button{s}}
    return params
}


func Menu(i float64) Buttons {
    if i < 2000000000 {
        s := InitBByte("Назад", []byte(`{"payload":"menu"}`), "secondary")
        params := Buttons{Buttons: []Button{s}}
        return params
    } else {
        return Buttons{}
    }
}

##########################################
s := bts.InitBByte("Моя стата", []byte(`{"payload":"invitestat"}`), "primary")
    params := bts.Keyboard(id.Chat, bts.Buttons{Buttons: []bts.Button{s}}, bts.Menu(id.Chat))