package billing

import (
	"errors"
	"testing"

	"bookra/apps/auth-service/internal/config"
)

func TestPriceForPlanUsesConfiguredPlanCodesOnly(t *testing.T) {
	service := NewService(&config.Config{
		StripePriceIDs: map[string]string{
			"monthly": "price_monthly",
			"growth":  "price_growth",
		},
	}, nil)

	priceID, planCode, currency, err := service.priceForPlan("growth", "czk")
	if err != nil {
		t.Fatalf("price for plan: %v", err)
	}
	if priceID != "price_growth" || planCode != "pro" || currency != "czk" {
		t.Fatalf("expected pro mapping, got price=%q plan=%q currency=%q", priceID, planCode, currency)
	}

	priceID, planCode, currency, err = service.priceForPlan("", "usd")
	if err != nil {
		t.Fatalf("default price for plan: %v", err)
	}
	if priceID != "price_monthly" || planCode != "monthly" || currency != "usd" {
		t.Fatalf("expected monthly default, got price=%q plan=%q currency=%q", priceID, planCode, currency)
	}

	_, _, _, err = service.priceForPlan("price_attacker_controlled", "czk")
	if !errors.Is(err, ErrPlanNotConfigured) {
		t.Fatalf("expected ErrPlanNotConfigured, got %v", err)
	}
}

func TestKVKeyShape(t *testing.T) {
	if got := userCustomerKey("user_123"); got != "stripe:user:user_123" {
		t.Fatalf("unexpected user key: %s", got)
	}
	if got := customerSnapshotKey("cus_123"); got != "stripe:customer:cus_123" {
		t.Fatalf("unexpected customer key: %s", got)
	}
}

func TestCheckoutAvailableForPlanRequiresSecret(t *testing.T) {
	service := NewService(&config.Config{
		StripePriceIDs: map[string]string{
			"pro:czk": "price_pro_czk",
		},
	}, nil)

	if service.checkoutAvailableForPlan("pro") {
		t.Fatal("expected checkout unavailable without stripe secret")
	}
}

func TestCheckoutAvailableForPlanRequiresConfiguredPlan(t *testing.T) {
	service := NewService(&config.Config{
		StripeSecretKey: "sk_test_123",
		StripePriceIDs: map[string]string{
			"pro:czk": "price_pro_czk",
		},
	}, nil)

	if !service.checkoutAvailableForPlan("pro") {
		t.Fatal("expected pro checkout available")
	}
	if service.checkoutAvailableForPlan("business") {
		t.Fatal("expected business checkout unavailable without configured price")
	}
}