package main

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

type Index struct {
  Title string
}

var data = &Index {
  Title: "MBot",
}

func fileHandler(file string, path string) {
  fs := http.FileServer(http.Dir("./" + file))
  http.Handle("/" + path + "/", http.StripPrefix("/" + path + "/", fs)) 
}

func aboutHandler(w http.ResponseWriter, req *http.Request) {
  templates := template.Must(template.ParseFiles(
    "src/index.tmpl",
    "src/pages/about.tmpl",
    "src/components/navbar.tmpl",
    "src/components/footer.tmpl",
  ))

  err := templates.ExecuteTemplate(w, "base", data)

  if err != nil {
    http.Error(w, err.Error(), http.StatusInternalServerError)
  }
}

func indexHandler(w http.ResponseWriter, req *http.Request) {
  templates := template.Must(template.ParseFiles(
    "src/index.tmpl",
    "src/pages/home.tmpl",
    "src/components/navbar.tmpl",
    "src/components/footer.tmpl",
  ))

  err := templates.ExecuteTemplate(w, "base", data)

  if err != nil {
    http.Error(w, err.Error(), http.StatusInternalServerError)
  }
}

func main() {
  if _, err := os.Stat("src/index.tmpl"); os.IsNotExist(err) {
    log.Fatal("Template file does not exist:\n", err)
  }

  fileHandler("src/assets", "assets");
  fileHandler("src/styles", "styles");
  fileHandler("src/scripts", "scripts");
  fileHandler("src/fonts", "fonts");

  port := ":3939"

  http.HandleFunc("/", indexHandler)
  http.HandleFunc("/about", aboutHandler)

  log.Println("Server running at http://localhost" + port)
  http.ListenAndServe(port, nil)
}