package payments

import (
	"math"
	"testing"
)

func TestPsychologicalSplitMath(t *testing.T) {
	// Base Price (what the seller wants to sell for)
	basePrice := 100.0

	// 1. Backend inflates by 6% for search/display
	buyerFeeRate := 0.06
	inflatedPrice := basePrice * (1 + buyerFeeRate) // 106.0

	// 2. Buyer sees 12% fee in checkout, but math must stay at 106.0
	// Visual Subtotal = 106.0 / 1.12 = 94.6428...
	visualSubtotal := inflatedPrice / 1.12
	visualFee := inflatedPrice - visualSubtotal

	// 3. Marketplace takes 12% of the TOTAL (inflated) price
	marketplaceCommission := 0.12
	totalMarketplaceFee := inflatedPrice * marketplaceCommission // 12.72

	// 4. Seller Receivable = Inflated Price - Marketplace Fee
	sellerReceivable := inflatedPrice - totalMarketplaceFee // 106.0 - 12.72 = 93.28

	// 5. Seller perceives it as 6% commission on THEIR base price
	perceivedCommission := basePrice * 0.06 // 6.0
	expectedSellerReceivable := basePrice - perceivedCommission // 94.0

	// ASSERTION: Does 93.28 == 94.0?
	// Result: NO. 
	// To make the seller receive 94.0 (Base - 6%), 
	// and Marketplace receive 12.72 (which is 12% of inflated 106.0),
	// The math needs adjustment.
	
	t.Logf("Base: %.2f", basePrice)
	t.Logf("Inflated (Buyer sees total): %.2f", inflatedPrice)
	t.Logf("Marketplace Fee (12%% of inflated): %.2f", totalMarketplaceFee)
	t.Logf("Seller Net: %.2f", sellerReceivable)
	t.Logf("Target Seller Net (Base - 6%%): %.2f", expectedSellerReceivable)

	if math.Abs(sellerReceivable-expectedSellerReceivable) > 0.01 {
		t.Errorf("Math mismatch! Seller receives %.2f but expected %.2f", sellerReceivable, expectedSellerReceivable)
	}
}