package main

import (
	"html/template"
	"net/http"
	"os"
)

func main() {
	// this code below makes a file server and serves everything as a file
	// fs := http.FileServer(http.Dir(""))
	// http.Handle("/", fs)

	// serve everything in the css folder, the img folder and mp3 folder as a file
	http.Handle("/css/", http.StripPrefix("/css/", http.FileServer(http.Dir("css"))))

	// when navigating to /home it should serve the home page
	http.HandleFunc("/", Home)
	http.HandleFunc("/rewards", Rewards)
	http.HandleFunc("/table", Rewards)
	http.ListenAndServe(getPort(), nil)
}

// Detect $PORT and if present uses it for listen and serve else defaults to :8080
// This is so that app can run on Heroku
func getPort() string {
	p := os.Getenv("PORT")
	if p != "" {
		return ":" + p
	}
	return ":8080"
}

func render(w http.ResponseWriter, tmpl string, data interface{}) {
	//parse the template file held in the templates folder
	t, err := template.ParseFiles("templates/"+tmpl, "templates/includes.html")
	if err != nil {
		panic(err)
	}

	// render the website and pass data to the templating engine
	err = t.Execute(w, data)
	if err != nil {
		panic(err)
	}
}