package main

import (
	"bufio"
	"flag"
	"github.com/ochinchina/go-ini"
	"io"
	"log"
	"os"
	"sort"
	"strings"
	"text/template"
)

func matchPartial(keys []ini.Key, givenName string) string {
	for _, k := range keys {
		v := k.ValueWithDefault("")
		if strings.Contains(givenName, k.Name()) {
			return v
		}
	}
	return "Expenses"
}

func generateLedgerTransactions(transactions []transaction, w io.Writer) error {
	t := template.New("ledger")
	_, err := t.Parse(transactionTemplate)
	if err != nil {
		return err
	}

	t.Execute(w, transactions)
	return nil
}

var (
	config    = flag.String("config", "", "configuration file containing all your vendor and account mappings")
	inputType = flag.String("T", "ofx", "input type of transaction data - supports ofx and xml")
)

func main() {
	flag.Parse()
	filename := flag.Arg(0)

	r, err := os.Open(filename)
	if err != nil {
		log.Fatalf("failed opening data file: %w", err)
	}
	defer r.Close()

	c, err := os.Open(*config)
	if err != nil {
		log.Fatalf("failed opening config file: %w", err)
	}
	defer c.Close()

	cfg := ini.NewIni()
	cfg.LoadReader(c)

	assets, err := cfg.GetSection("Assets")
	if err != nil {
		log.Fatalf("failed finding assets section of config: %w", err)
	}

	vendors, err := cfg.GetSection("Vendors")
	if err != nil {
		log.Fatalf("failed finding vendors section of config: %w", err)
	}

	var transactions []transaction
	if *inputType == "ofx" {
		transactions, err = transactionsFromOfx(r, *assets, vendors.Keys())
		if err != nil {
			log.Fatalf("failed generating transactions from ofx: %w", err)
		}
	} else if *inputType == "xml" {
		transactions, err = transactionsFromXml(r, *assets, vendors.Keys())
		if err != nil {
			log.Fatalf("failed generating transactions from xml: %w", err)
		}
	}

	w := bufio.NewWriter(os.Stdout)
	sort.Sort(byDate(transactions))
	err = generateLedgerTransactions(transactions, w)
	if err != nil {
		log.Fatal(err)
	}
	err = w.Flush()
	if err != nil {
		log.Fatal(err)
	}
}