package input

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

// Field is a text or number based input component.
// The HTML input type is determined by the bound data type.
type Field struct {
	AttrMap vugu.AttrMap
	ID      string // The ID of the internal input component.

	Bind interface {
		ValueBinder
		HTMLInputTyper
	}

	DefaultSlot vugu.Builder

	Type string // Overrides the type of the input component.

	err error // Current error caused by any invalid input.

	Input    InputHandler    // External handler that is called upon an event.
	KeyDown  KeyDownHandler  // External handler that is called upon an event.
	KeyPress KeyPressHandler // External handler that is called upon an event.
	KeyUp    KeyUpHandler    // External handler that is called upon an event.
}

func (c *Field) content() string {
	if c.Bind != nil {
		return c.Bind.StringValue()
	}

	return ""
}

func (c *Field) inputType() string {
	if c.Type != "" {
		return c.Type
	}

	if c.Bind != nil {
		return c.Bind.HTMLInputType()
	}

	return ""
}

func (c *Field) handleInput(event vugu.DOMEvent) {
	val := event.PropString("target", "value")

	if c.Bind != nil {
		c.err = c.Bind.SetStringValue(val)
	}

	if c.Input != nil {
		c.Input.InputHandle(InputEvent{event})
	}
}

func (c *Field) handleKeyDown(event vugu.DOMEvent) {
	if c.KeyDown != nil {
		c.KeyDown.KeyDownHandle(KeyDownEvent{event})
	}
}

func (c *Field) handleKeyPress(event vugu.DOMEvent) {
	if c.KeyPress != nil {
		c.KeyPress.KeyPressHandle(KeyPressEvent{event})
	}
}

func (c *Field) handleKeyUp(event vugu.DOMEvent) {
	if c.KeyUp != nil {
		c.KeyUp.KeyUpHandle(KeyUpEvent{event})
	}
}