Invoice - {tx

use crate::domain::models::{Merchant, OrderRecord}; pub struct BillingService; impl BillingService { pub fn generate_invoice_html(order: &OrderRecord, merchant: &Merchant) -> String { let subtotal = order.price_inr; let total_tax = order.cgst + order.sgst + order.igst; let grand_total = subtotal + total_tax + order.delivery_fee; format!( r#" Invoice - {tx_id}

Sold By

{brand_name}

{merchant_addr}

Ship To

{buyer_name}

{buyer_email}

{buyer_addr}

Item Description	Amount
Product Purchase ({link_id})	₹{subtotal:.2}

Subtotal ₹{subtotal:.2}

Tax (GST) ₹{total_tax:.2}

Shipping ₹{shipping:.2}

{discount_row}

Grand Total ₹{total:.2}

"#, brand_name = merchant.brand_name, tx_id = order.transaction_id, date = order .created_at .map(|t| t.format("%d %b %Y").to_string()) .unwrap_or_else(|| "N/A".to_string()), merchant_addr = merchant.business_address.as_deref().unwrap_or("N/A"), buyer_name = order.buyer_name, buyer_email = order.buyer_email, buyer_addr = order.delivery_address.as_deref().unwrap_or("N/A"), link_id = order.link_id, subtotal = subtotal, total_tax = total_tax, shipping = order.delivery_fee, total = grand_total, discount_row = if order.discount_amount > 0.0 { format!( r#"

Discount-₹{:.2}

"#, order.discount_amount ) } else { String::new() } ) } }