package main

import (
	"encoding/json"
	"fmt"
	"log"
	"math/rand"
	"net/http"
)

func homePage(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintf(w, "Welcome to the Agresija!")
	fmt.Println("Endpoint Hit: homePage")
}

func handleRequests() {
	http.HandleFunc("/", randomQuestion)
	log.Fatal(http.ListenAndServe(":10000", nil))
}

func main() {
	Questions = []Question{
		Question{Category: "Muzika", Question: "Koji kompozitor je stariji od Mozarta?", Answer1: "Haydn", Answer2: "Rizo Ruža", Answer3: "Wagner", Answer4: "Vatroslav Lisinski"},
		Question{Category: "Matematika", Question: "Beskonačno minus beskonačno - koliki je rezultat ?", Answer1: "0", Answer2: "Zavisi", Answer3: "2 beskonačna", Answer4: "Nedefinisano u matematici"},
		Question{Category: "Književnost", Question: "Ko je napisao djelo 'Idiot'?", Answer1: "Dostojevski", Answer2: "Decembarski", Answer3: "Lenjin", Answer4: "Branko Čopić"},
	}
	handleRequests()
}

func randomQuestion(w http.ResponseWriter, r *http.Request) {
	randomIndex := rand.Intn(len(Questions))
	question := Questions[randomIndex]
	json.NewEncoder(w).Encode(question)
}

type Question struct {
	Category string `json:"category"`
	Question string `json:"question"`
	Answer1  string `json:"answer1"`
	Answer2  string `json:"answer2"`
	Answer3  string `json:"answer3"`
	Answer4  string `json:"answer4"`
}

// let's declare a global Questions array
// that we can then populate in our main function
// to simulate a database
var Questions []Question