package main

import (
	"encoding/xml"
	"flag"
	"fmt"
	"log"
	"os"
	"time"

	"src.wolkict.net/sepa/pain"
)

var (
	csvFile  = flag.String("csv", "", "use this batch import CSV file")
	execDate = flag.String("date", time.Now().AddDate(0, 0, 7).Format("2006-01-02"), "manually set batch execution date")
	msgId    = flag.String("msgId", time.Now().Format("20060102T150405"), "manually set this msgId")
)

func usage() {
	fmt.Println("Usage: createbatch -csv <file.csv>")
	flag.PrintDefaults()
}

func main() {
	flag.Parse()

	if *csvFile == "" {
		usage()
		log.Fatalf("mandatory -csv not set")
	}

	if _, err := os.Open(*csvFile); err != nil {
		log.Fatalf("cannot access CSV %q: %v", *csvFile, err)
	}

	collectionDate, err := time.Parse("2006-01-02", *execDate)
	if err != nil {
		log.Fatalf("could not parse execution date: %v", err)
	}

	batchLines, err := ImportCSV(*csvFile)
	if err != nil {
		log.Fatalf("cannot import batch CSV: %v", err)
	}

	d := pain.NewDocument(INITIATOR_NAME)
	d.SetMeta(CREDITOR_NAME, CREDITOR_ADDR1, CREDITOR_ADDR2, CREDITOR_IBAN, CREDITOR_BIC, CREDITOR_ID, collectionDate, "RCUR")
	for _, tx := range batchLines {
		if tx.Id == (pain.PaymentId{}) {
			continue
		}
		d.AddTransaction(tx)
	}

	err = d.Finalize(*msgId)
	if err != nil {
		log.Fatalf("finalizing failed: %v", err)
	}

	xmlBytes, err := xml.Marshal(d)
	if err != nil {
		log.Fatalf("marshaling failed: %v", err)
	}

	fmt.Printf("%v%v", xml.Header, string(xmlBytes))
}