package main

import (
	"encoding/xml"
	"github.com/aclindsa/ofxgo"
	"time"
	"fmt"
	"github.com/ochinchina/go-ini"
	"io"
)

func transactionsFromXml(r io.Reader, assets ini.Section, vendors []ini.Key) ([]transaction, error) {
	type xmlTransaction struct {
		XMLName xml.Name `xml:"transaction"`
		Date string `xml:"Date"`
		TrnAmt float64 `xml:"amount"`
		Asset string	`xml:"Asset"`
		Expense string	`xml:"Expense,omitempty"`
		VendorName string	`xml:"VendorName,omitempty"`
		Currency string	`xml:"Currency"`
	}
	type transactionParent struct {
		XMLName xml.Name `xml:"transactions"`
		Transactions []xmlTransaction `xml:"transaction"`
	}
	root := new(transactionParent)
	d := xml.NewDecoder(r)
	err := d.Decode(&root)
	if err != nil {
		return nil, fmt.Errorf("failed unmarshaling xml: %w", err)
	}

	xtx := root.Transactions
	transactions := make([]transaction, 0)
	for _, t := range xtx {
		var expense string
		if t.VendorName != "" && t.Expense == "" {
			expense = matchPartial(vendors, t.VendorName)
		}
		time, err := time.Parse("1/02/2006", t.Date)
		if err != nil {
			return nil, fmt.Errorf("failed parsing time: %w", err)
		}
		tx := transaction {
			Date: time,
			TrnAmt: t.TrnAmt,
			Asset: t.Asset,
			Expense: expense,
			VendorName: t.VendorName,
			Currency: t.Currency,
		}
		transactions = append(transactions, tx)
	}
	return transactions, nil
}

func transactionsFromOfx(r io.Reader, assets ini.Section, vendors []ini.Key) ([]transaction, error) {
	resp, err := ofxgo.ParseResponse(r)
	if err != nil {
		return nil, err
	}

	transactions := make([]transaction, 0)
	for _, m := range resp.Bank {
		if stmt, ok := m.(*ofxgo.StatementResponse); ok {
			for _, t := range stmt.BankTranList.Transactions {
				acctId := stmt.BankAcctFrom.AcctID.String()
				amt, _ := t.TrnAmt.Rat.Float64()
				tx := transaction{
					Date:       t.DtPosted.Time,
					TrnAmt:     amt,
					Asset:      assets.GetValueWithDefault(acctId, acctId),
					Expense:    matchPartial(vendors, t.Name.String()),
					VendorName: t.Name.String(),
					Currency:   stmt.CurDef.String(),
				}
				transactions = append(transactions, tx)
			}
		}
	}
	return transactions, nil
}