package main

import (
    "fmt"
    "net/http"
    "net/http/cookiejar"

    "fyne.io/fyne"
    "fyne.io/fyne/app"
    "fyne.io/fyne/layout"
    "fyne.io/fyne/widget"
)

type State struct {
    app     fyne.App
    client  *http.Client
    loginw  fyne.Window
    mainapp fyne.App
    mainw   fyne.Window
}

func main() {
    var state State
    cookieJar, _ := cookiejar.New(nil)
    state.client = &http.Client{
        Jar: cookieJar,
    }
    state.app = app.New()
    loginresult := widget.NewLabel("")
    usrf := widget.NewEntry()
    passf := widget.NewPasswordEntry()
    result := ""
    state.loginw = state.app.NewWindow("Loggboken")
    state.loginw.SetContent(widget.NewVBox(
        usrf,
        passf,
        layout.NewSpacer(),
        widget.NewButton("Logga in", func() {
            u := usrf.Text
            p := passf.Text
            state.login(u, p)
        }),
        widget.NewButton("Avsluta", func() { state.app.Quit() }),
        widget.NewLabel(result),
        loginresult,
    ))
    usrf.SetPlaceHolder("Användarnamn")
    state.loginw.Resize(fyne.Size{
        Width:  300,
        Height: 200,
    })
    state.loginw.CenterOnScreen()
    state.loginw.ShowAndRun()
    state.mainw.ShowAndRun()
}

func (s *State) login(u string, p string) {
    logind := "username=" + u + "&password=" + p
    fmt.Println(logind)
    body := POST(s.client, "", logind, "application/x-www-form-urlencoded")
    if body == "student" {
        s.loginw.Close()
        s.mainscreen()
    } else {
        fmt.Println("Fel vid inloggning!")
        return
    }
}

func (s *State) mainscreen() {
    fmt.Println("Mainscreen start!")
    s.mainw = s.app.NewWindow("Idag")
    s.mainw.SetContent(widget.NewVBox(
        widget.NewEntry(),
        widget.NewButton("SPARA", func() {}),
        widget.NewButton("Avsluta", func() { s.app.Quit() }),
    ))
    s.mainw.Resize(fyne.Size{
        Width:  500,
        Height: 200,
    })
    s.mainw.CenterOnScreen()
    fmt.Println("Mainscreen END!")
}