package main

import (
	"log"

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

	"xengineering.eu/limox/xmpp"
)

type LimoxState uint8

const (
	Disconnected LimoxState = iota
	Connecting
	Connected
)

type Limox struct {
	JidEditor  widget.Editor
	PwdEditor  widget.Editor
	MainButton widget.Clickable
	sessionIn  chan<- any
	sessionOut chan any
	State      LimoxState
	Window     *app.Window
	Operations op.Ops
	Theme      *material.Theme
}

func NewLimox() Limox {
	l := Limox{
		Window: app.NewWindow(
			app.Title("LimoX"),
			app.Size(unit.Dp(400), unit.Dp(600)),
		),
		Operations: op.Ops{},
		Theme:      material.NewTheme(gofont.Collection()),
		sessionOut: make(chan any),
		State:      Disconnected,
	}

	l.JidEditor.SetText(getLastJid())
	l.PwdEditor.SetText(getLastPwd())

	return l
}

func (l *Limox) run() error {
	for {
		select {
		case e := <-l.Window.Events():
			switch e := e.(type) {
			case system.DestroyEvent:
				return e.Err
			case system.FrameEvent:
				if l.MainButton.Clicked() {
					l.buttonCallback()
				}
				l.draw(e)
			}
		case data := <-l.sessionOut:
			switch data.(type) {
			case xmpp.SessionDisconnect:
				l.State = Disconnected
			case xmpp.SessionConnect:
				l.State = Connected
			default:
				log.Printf("Unknown XMPP data '%d'\n", data)
			}
			l.Window.Invalidate()
		}
	}
}

func (l *Limox) buttonCallback() {
	c := l.sessionIn
	switch l.State {
	case Disconnected:
		jid := l.JidEditor.Text()
		pwd := l.PwdEditor.Text()
		setLastJid(jid)
		setLastPwd(pwd)
		l.sessionIn = xmpp.StartSession(l.sessionOut, jid, pwd)
		l.State = Connecting
	case Connecting:
		go func() { c <- xmpp.SessionShouldDisconnect{} }()
		l.State = Disconnected
	case Connected:
		go func() { c <- xmpp.SessionShouldDisconnect{} }()
		l.State = Disconnected
	}
}