package main

import (
	"html/template"
	"log"
	"net/http"
	"time"

	"github.com/go-chi/chi"
	"github.com/go-chi/chi/middleware"
	"github.com/pkg/errors"

	"forge.cadoles.com/foodoles/auth"
	"forge.cadoles.com/foodoles/bdd"
	"forge.cadoles.com/foodoles/config"
	"forge.cadoles.com/foodoles/foodlist"
	"forge.cadoles.com/foodoles/vote"
)

// User is a user
type User struct {
	Name     string
	Password string
}

const configFile string = "server.conf"

var secret string

func main() {

	var conf *config.Config
	var conferr error
	conf, conferr = config.NewFromFile(configFile)
	if conferr != nil {
		conf = config.NewDefault()
	}
	secret = conf.HTTP.Secret

	bdd.InitDB()

	vote.GetVotesOfTheDay()

	r := chi.NewRouter()
	r.Use(middleware.Logger)
	r.Use(middleware.Recoverer)
	r.Use(middleware.Timeout(60 * time.Second))
	r.Handle("/", &User{})
	r.Handle("/results", &User{})

	log.Printf("listening on '%s'", conf.HTTP.Address)
	if err := http.ListenAndServe(conf.HTTP.Address, r); err != nil {
		panic(errors.Wrapf(err, "error while listening on '%s'", conf.HTTP.Address))
	}
}

// ServerHTTP is the entry point to all requests
func (u *User) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	if err := r.ParseForm(); err != nil {
		log.Printf("ParseForm() err: %v", err)
		return
	}

	u.Auth(r.FormValue("user"), r.FormValue("password"))

	if r.Method == http.MethodPost && r.Form.Get("option") != "" && r.Form.Get("key") == secret {
		VoteEndPoint(w, r)
		return
	}
	if u.Name == "" {
		LogInPage(w, r)
		return
	}
	if r.URL.Path == "/" {
		HomePage(w, r)
		return
	}
	if r.URL.Path == "/results" {
		ResultsPage(w, r)
		return
	}

}

// Auth is the login page for user
func (u *User) Auth(user string, pass string) bool {
	auth, _ := auth.LogIn(user, pass)
	if auth {
		u.Name = user
		u.Password = pass
	} else {
		u.Name = ""
		u.Password = ""
	}

	return auth
}

// LogInPage is the log in page of the app
func LogInPage(w http.ResponseWriter, r *http.Request) {
	paths := []string{
		"./templates/login.tmpl",
	}
	t := template.Must(template.New("login.tmpl").ParseFiles(paths...))
	if err := t.Execute(w, ""); err != nil {
		log.Printf("\nExecute error: %v", err)
		return
	}
}

// HomePage is the homepage of the app
func HomePage(w http.ResponseWriter, r *http.Request) {
	type HomeData struct {
		Key   string
		Foods foodlist.FoodOfTheDay
		Votes vote.VotesOfTheDay
	}

	datas := HomeData{secret, foodlist.GetFoodOfTheDay(), vote.GetVotesOfTheDay()}

	paths := []string{
		"./templates/index.tmpl",
	}
	t := template.Must(template.New("index.tmpl").ParseFiles(paths...))

	if err := t.Execute(w, datas); err != nil {
		log.Printf("\nExecute error: %v", err)
		return
	}
}

// ResultsPage is the page displaiyng the votes results
func ResultsPage(w http.ResponseWriter, r *http.Request) {
	paths := []string{
		"./templates/results.tmpl",
	}
	t := template.Must(template.New("results.tmpl").ParseFiles(paths...))

	if err := t.Execute(w, vote.GetVotesOfTheDay()); err != nil {
		log.Printf("\nExecute error: %v", err)
		return
	}
}

// VoteEndPoint is the endpoint to add votes
func VoteEndPoint(w http.ResponseWriter, r *http.Request) {
	r.ParseForm()
	option := r.Form.Get("option")

	log.Print("vote for : ", option)
	vote.ForFood(option)

	w.WriteHeader(http.StatusOK)
	w.Header().Set("Content-Type", "application/json")
	w.Write([]byte("Success vote for: " + option))
}