package main

import (
	"image/color"
	"log"
	"os"

	"gioui.org/app"
	"gioui.org/font/gofont"
	"gioui.org/io/system"
	"gioui.org/layout"
	"gioui.org/op"
	"gioui.org/text"
	"gioui.org/unit"
	"gioui.org/widget"
	"gioui.org/widget/material"
)

type Limox struct {
	Button     widget.Clickable
	Window     *app.Window
	Operations op.Ops
	Theme      *material.Theme
}

func main() {
	limox := NewLimox()

	go func() {
		err := limox.run()
		if err != nil {
			log.Fatal(err)
		}
		os.Exit(0)
	}()

	app.Main()
}

func NewLimox() Limox {
	return Limox{
		Window: app.NewWindow(
			app.Title("LimoX"),
			app.Size(unit.Dp(400), unit.Dp(600)),
		),
		Operations: op.Ops{},
		Theme:      material.NewTheme(gofont.Collection()),
	}
}

func (l *Limox) run() error {
	for {
		e := <-l.Window.Events()
		switch e := e.(type) {
		case system.DestroyEvent:
			return e.Err
		case system.FrameEvent:
			l.draw(e)
		}
	}
}

func (l *Limox) draw(e system.FrameEvent) {
	gtx := layout.NewContext(&l.Operations, e)

	flex := layout.Flex{
		Axis:    layout.Vertical,
		Spacing: layout.SpaceBetween,
	}

	flex.Layout(gtx,
		layout.Rigid(
			func(gtx layout.Context) layout.Dimensions {
				stateLabel := material.H2(l.Theme, "LimoX")
				stateLabel.Color = color.NRGBA{R: 20, G: 20, B: 20, A: 255}
				stateLabel.Alignment = text.Middle
				return stateLabel.Layout(gtx)
			},
		),
		layout.Rigid(
			func(gtx layout.Context) layout.Dimensions {
				btn := material.Button(l.Theme, &l.Button, "connect")
				return btn.Layout(gtx)
			},
		),
	)

	e.Frame(gtx.Ops)
}