package main

import (
	"bytes"
	_ "embed"
	"flag"
	"fmt"
	"io"
	"log"
	"net/http"
	"time"

	"git.ecogood.org/andreas.schroepfer/excelConverter/pkg/loader"
)

//go:embed files/upload.htm
var homepage []byte

var (
	flagPort = flag.String("p", ":2727", "port for the http-server")
)

func main() {
	run()
}

func run() {
	mux := http.NewServeMux()
	mux.HandleFunc("/convert/", handleConvert)
	mux.HandleFunc("/", handleRoot)
	s := &http.Server{
		Addr:           *flagPort,
		Handler:        mux,
		ReadTimeout:    10 * time.Second,
		WriteTimeout:   10 * time.Second,
		MaxHeaderBytes: 1 << 20,
	}
	fmt.Println("starting server at:")
	fmt.Printf("http://localhost%s/", *flagPort)
	log.Fatal(s.ListenAndServe())
}

func handleRoot(w http.ResponseWriter, r *http.Request) {
	buf := bytes.NewBuffer(homepage)
	io.Copy(w, buf)
}

func handleConvert(w http.ResponseWriter, r *http.Request) {
	r.ParseMultipartForm(10 << 20)
	file, _, err := r.FormFile("myFile")
	if err != nil {
		fmt.Println("Error Retrieving the File")
		fmt.Println(err)
		return
	}
	defer file.Close()
	eBalance, err := loader.XLSX(file, nil)
	if err != nil {
		fmt.Fprintf(w, "convert errors<br>: %s", err)
	}
	eBalance.EncodeJSON(w)
}