From d9e2ed5e2f30e78f701f1d00ebc5eafd2c2f0204 Mon Sep 17 00:00:00 2001
From: Joerg Lehmann <joerg.lehmann@nbit.ch>
Date: Thu, 28 Dec 2023 13:37:38 +0100
Subject: [PATCH] first roughly working balance sheet...

---
 bookkeeper.go | 42 +++++++++++++++++++++++++++++++++---------
 1 file changed, 33 insertions(+), 9 deletions(-)

diff --git a/bookkeeper.go b/bookkeeper.go
index b90781d..a74e130 100644
--- a/bookkeeper.go
+++ b/bookkeeper.go
@@ -80,7 +80,24 @@ func accountBalanceExists(s string) bool {
 }
 
 func calculateVAT(vat_code string, amount float64) float64 {
-	return 0.0
+	if vat_code == "" {
+		return 0.0
+	}
+	vat_type := string(vat_code[0])
+	vat_perc, err := strconv.Atoi(vat_code[1:])
+	if err != nil {
+		fmt.Println(err)
+		return 0.0
+	}
+	vat_perc_f64 := float64(vat_perc)
+	if vat_type == "V" {
+		return 0 - (amount / (1000.0 + vat_perc_f64) * vat_perc_f64)
+	} else if vat_type == "I" {
+		return (amount / (1000.0 + vat_perc_f64) * vat_perc_f64)
+	} else {
+		fmt.Printf("WARNING: Invalid Vat Type: %s\n", vat_type)
+		return 0.0
+	}
 }
 
 func addTransaction(document_number string, date string, text string, account_number_debit string, account_number_credit string, amount string, vat_code string) {
@@ -131,8 +148,11 @@ func addTransaction(document_number string, date string, text string, account_nu
 	} else {
 		myBalance.balance_end = myBalance.balance_end - myItem.Amount
 	}
+	if myItem.Amount_Vat > 0 {
+		myBalance.balance_end = myBalance.balance_end - myItem.Amount_Vat
+	}
 	account_balance[account_number_debit] = myBalance
-	if account_number_debit == "2202" {
+	if account_number_debit == "3400" {
 		fmt.Printf("DEBUG DEBIT: %s,%s,%v,%v\n", account_number_debit, account_type, myItem.Amount, myBalance)
 	}
 
@@ -143,21 +163,25 @@ func addTransaction(document_number string, date string, text string, account_nu
 	} else {
 		myBalance.balance_end = myBalance.balance_end + myItem.Amount
 	}
+	if myItem.Amount_Vat < 0 {
+		myBalance.balance_end = myBalance.balance_end + myItem.Amount_Vat
+	}
 	account_balance[account_number_credit] = myBalance
-	if account_number_credit == "2202" {
+	if account_number_credit == "3400" {
 		fmt.Printf("DEBUG CREDIT: %s,%s,%v,%v\n", account_number_credit, account_type2, myItem.Amount, myBalance)
 	}
 
 	myBalance = account_balance[MWST_ACCOUNT]
 	myBalance.balance_end = myBalance.balance_end + myItem.Amount_Vat
+	fmt.Printf("DEBUG MWST: %s: %v,%v\n", document_number, myItem.Amount_Vat, myBalance)
 	account_balance[MWST_ACCOUNT] = myBalance
 
-	//if account_number_debit == "3400" {
-	//		fmt.Printf("DEBUG DEBIT: Document %s, found 3400 transaction: %v\n", document_number, amount)
-	//	}
-	//	if account_number_credit == "3400" {
-	//		fmt.Printf("DEBUG CREDIT: Document %s, found 3400 transaction: %v\n", document_number, account_balance["3400"])
-	//	}
+	if account_number_debit == "3400" {
+		fmt.Printf("DEBUG DEBIT: Document %s, found 3400 transaction: %v\n", document_number, amount)
+	}
+	if account_number_credit == "3400" {
+		fmt.Printf("DEBUG CREDIT: Document %s, found 3400 transaction: %v\n", document_number, account_balance["3400"])
+	}
 
 	_, ok := transactions[uint16(document_number_i)]
 	if ok {