package main

import (
	"fmt"
	"html/template"
	"log"
	"net/http"
	"os"
	"path/filepath"

	"github.com/joho/godotenv"
)

func handler(writer http.ResponseWriter, request *http.Request) {
	templ := template.Must(template.ParseFiles("./web/dist/index.html"))

	templ.Execute(writer, nil)
}

func main() {
	err := godotenv.Load()
	if err != nil {
		log.Fatal("Error loading .env file")
	}

	webDir := "./web/dist"
	fs := http.FileServer(http.Dir(webDir))

	http.HandleFunc("/", func(writer http.ResponseWriter, request *http.Request) {
		if request.URL.Path != "/" {
			path := filepath.Join(webDir, filepath.Clean(request.URL.Path))
			_, err := os.Stat(path)
			if err == nil {
				fs.ServeHTTP(writer, request)
				return
			}
		}
		handler(writer, request)
	})

	port := os.Getenv("HTTP_PORT")
	if port == "" {
		port = "8080"
	}
	addr := ":" + port
	fmt.Printf("Server listening on http://localhost%s\n", addr)
	if err := http.ListenAndServe(addr, nil); err != nil {
		log.Fatalf("server error: %v", err)
	}
}