package main

import (
	"flag"
	"fmt"
	"log"
	"os"
	"path/filepath"
	"strings"

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

func main() {
	inFile, outFile := parseArgs()
	xf, err := os.Open(inFile)
	if err != nil {
		log.Fatal("cannot open file:", err)
	}
	defer xf.Close()
	eBalance, err := loader.XLSX(xf, nil)
	if err != nil {
		fmt.Println("errors when loading from excel:")
		fmt.Println(err)
	}

	out, err := os.OpenFile(outFile, os.O_CREATE, 0666)
	fmt.Println("createFileErr:", err)
	eBalance.EncodeJSON(out)
	out.Close()
}

func parseArgs() (inFile, outFile string) {
	flag.Parse()
	args := flag.Args()
	switch len(args) {
	case 0:
		fmt.Println("you need to provide an input-file")
		fmt.Println("the output is optional")
		fmt.Println("exel_converter [input] [[output]]")
		os.Exit(1)
	case 1:
		inFile, outFile = args[0], fmt.Sprintf("%s.json", args[0])
	case 2:
		inFile, outFile = args[0], args[1]
	default:
		fmt.Println("warning: just the first 2 arguments are used!")
		fmt.Println("exel_converter [input] [[output]]")
	}
	if !strings.EqualFold(".xlsx", filepath.Ext(inFile)) {
		fmt.Println("input needs to be an xlsx-file!")
		os.Exit(2)
	}
	return inFile, outFile
}