package goback

import (
	"fmt"
	"github.com/jroimartin/gocui"
	"strings"
)

/* Returns s centered across w characters */
func CenterText(s string, w int, p string) string {
	s_w := len(s)
	repeated := ""
	if (w-s_w)/2 > 0 {
		repeated = strings.Repeat(p, (w-s_w)/2)
	}
	return repeated + s + repeated
}

/* Print a Label
 *	s - contents
 *	x - x position
 *	y - y position
 *	w - width
 *	h - height
 */
func PrintLabel(s string, x int, y int, w int, h int, g *gocui.Gui, name string) error {
	v, err := g.SetView(name, x, y, x+w, y+h)
	if err != nil {
		if err != gocui.ErrorUnkView {
			return err
		}
		v.Frame = false
		fmt.Fprintln(v, s)
	}
	return nil
}

/* Print a Framed Label
 *	s - contents
 *	x - x position
 *	y - y position
 *	w - width
 *	h - height
 */
func PrintFramedLabel(s string, x int, y int, w int, h int, g *gocui.Gui, name string) error {
	if v, err := g.SetView(name, x, y, x+w, y+h); err != nil {
		if err != gocui.ErrorUnkView {
			return err
		}
		fmt.Fprintln(v, s)
	}
	return nil
}

func PrintButton(title string, x int, y int, w int, h int, g *gocui.Gui, name string) error {
	if v, err := g.SetView(name, x, y, x+w, y+h); err != nil {
		if err != gocui.ErrorUnkView {
			return err
		}
		v.Highlight = true
		fmt.Fprintln(v, " "+CenterText(title, (w-2), " ")+" ")
	}
	return nil
}

func PrintMenu(title string, x int, y int, w int, h int, options []string, g *gocui.Gui, name string) error {
	if title != "" {
		if v_title, err := g.SetView(name+"-menu-title", x, y, x+w, y+2); err != nil {
			if err != gocui.ErrorUnkView {
				return err
			}
			fmt.Fprintln(v_title, title)
		}
	}
	if v_menu, err := g.SetView(name, x, y+2, x+w, y+h-2); err != nil {
		if err != gocui.ErrorUnkView {
			return err
		}
		v_menu.Highlight = true
		for _, m_opt := range options {
			fmt.Fprintln(v_menu, CenterText(m_opt, w, " "))
		}
	}
	return nil
}

func GetLine(g *gocui.Gui, v *gocui.View) (string, error) {
	var l string
	var err error
	_, cy := v.Cursor()
	if l, err = v.Line(cy); err != nil {
		l = ""
	}
	return l, err
}

/* Modal Types */
/*
const (
	ModalAlert   = iota // Just a popup
	ModalConfirm        // Ok/Cancel Popup
	ModalPrompt         // Prompt for Text Popup
)

type ModalButton struct {
	label  string // What is displayed on this button
	action func() // The function that gets called when 'enter' is pressed
}

func PrintModal(title string, contents string, x int, y int, w int, h int, modalType int, g *gocui.Gui, name string) error {
}
*/