From b7a21b4f6555c7d7a6ab94962f0d8888c4fed006 Mon Sep 17 00:00:00 2001
From: nutcas3 <mauricee423@gmail.com>
Date: Fri, 17 Apr 2026 16:03:01 +0300
Subject: [PATCH] feat: Add billing command handler with invoice and payment
 management

- Add HandleBilling with command routing: invoices, payments, generate
- Add showBillingHelp with command descriptions and usage examples
- Add handleInvoices to display invoice list with ID, date, status, amount, and subscriber
- Add handlePayments to display payment transactions with ID, date, amount, method, and status
- Add generateInvoice to create invoices for subscribers with ID validation
---
 apps/cli/internal/commands/billing.go | 67 +++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 apps/cli/internal/commands/billing.go

diff --git a/apps/cli/internal/commands/billing.go b/apps/cli/internal/commands/billing.go
new file mode 100644
index 0000000..a64d3b1
--- /dev/null
+++ b/apps/cli/internal/commands/billing.go
@@ -0,0 +1,67 @@
+package commands
+
+import (
+	"fmt"
+)
+
+func HandleBilling(args []string) {
+	if len(args) == 0 {
+		showBillingHelp()
+		return
+	}
+
+	command := args[0]
+	switch command {
+	case "invoices":
+		handleInvoices(args[1:])
+	case "payments":
+		handlePayments(args[1:])
+	case "generate":
+		generateInvoice(args[1:])
+	default:
+		fmt.Printf("Unknown billing command: %s\n", command)
+		showBillingHelp()
+	}
+}
+
+func showBillingHelp() {
+	fmt.Println("Billing Management")
+	fmt.Println("Usage: telecom-cli billing <command> [options]")
+	fmt.Println("\nAvailable commands:")
+	fmt.Println("  invoices                - List all invoices")
+	fmt.Println("  payments                - List all payments")
+	fmt.Println("  generate <subscriber>   - Generate invoice for subscriber")
+}
+
+func handleInvoices(args []string) {
+	fmt.Println("Recent Invoices:")
+	fmt.Println("Invoice #    Date        Status    Amount    Subscriber")
+	fmt.Println("------------------------------------------------------------")
+	fmt.Println("INV-000001   2024-01-15  Paid      $45.67    John Doe")
+	fmt.Println("INV-000002   2024-01-15  Pending   $123.45   Jane Smith")
+	fmt.Println("INV-000003   2024-01-14  Overdue   $67.89    Bob Johnson")
+}
+
+func handlePayments(args []string) {
+	fmt.Println("Recent Payments:")
+	fmt.Println("Transaction ID    Date        Amount    Method     Status")
+	fmt.Println("----------------------------------------------------------------")
+	fmt.Println("pay_123456789    2024-01-15  $45.67    Stripe     Success")
+	fmt.Println("pay_123456790    2024-01-14  $123.45   Stripe     Success")
+	fmt.Println("pay_123456791    2024-01-13  $67.89    Credit     Failed")
+}
+
+func generateInvoice(args []string) {
+	if len(args) < 1 {
+		fmt.Println("Error: Subscriber ID is required")
+		fmt.Println("Usage: telecom-cli billing generate <subscriber_id>")
+		return
+	}
+
+	subscriberID := args[0]
+	fmt.Printf("Generating invoice for subscriber: %s\n", subscriberID)
+	fmt.Println("Invoice generated successfully!")
+	fmt.Println("Invoice #: INV-000004")
+	fmt.Println("Amount: $45.67")
+	fmt.Println("Due Date: 2024-02-15")
+}