package input

import (
	"github.com/vugu/vugu"
)

// Dropdown provides several options that the user can choose.
type Dropdown struct {
	AttrMap vugu.AttrMap

	Bind     ValueBinder // Binds the current selected key to some variable.
	BindList ListBinder  // Binds the list content to some list provider.
}

func (c *Dropdown) currentKey() string {
	if c.Bind == nil {
		return ""
	}

	return c.Bind.StringValue()
}

func (c *Dropdown) isKeySelected(key string) bool {
	if c.Bind == nil {
		return false
	}

	return key == c.Bind.StringValue()
}

func (c *Dropdown) keyValuePairs() []ListKeyValuePair {
	if c.BindList == nil {
		return nil
	}

	return c.BindList.ListKeyValuePairs()
}

func (c *Dropdown) handleChange(event vugu.DOMEvent) {
	if c.Bind == nil {
		return
	}

	val := event.PropString("target", "value")
	c.Bind.SetStringValue(val)
}