portal-api/tests/Feature/Api/Service/CouponOrderTest.php

<?php

declare(strict_types=1);

namespace Tests\Feature\Api\Service;

use App\Enums\Order\OrderStatus;
use App\Models\Coupon;
use App\Models\CouponRedemption;
use App\Models\Customer;
use App\Models\Order;
use App\Models\Product;
use App\Models\ProductPricings;
use App\Services\Api\Order\OrderService;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\Bus;
use Illuminate\Testing\TestResponse;
use Tests\TestCase;

class CouponOrderTest extends TestCase
{
    use RefreshDatabase;

    private Customer $customer;
    private Product $product;

    protected function setUp(): void
    {
        parent::setUp();

        $this->customer = Customer::factory()->create(['total' => 10_000_000]);
        $this->product = Product::factory()->create(['product_type' => 'vps', 'is_active' => true]);

        ProductPricings::create([
            'product_id' => $this->product->id,
            'billing_cycle' => 'monthly',
            'price' => 100_000,
            'is_active' => true,
        ]);
    }

    private function coupon(array $overrides = []): Coupon
    {
        return Coupon::create(array_merge([
            'code' => 'SALE10',
            'type' => Coupon::TYPE_PERCENT,
            'value' => 10,
            'applies_to' => Coupon::APPLIES_NEW,
            'is_active' => true,
        ], $overrides));
    }

    private function as(Customer $customer): static
    {
        return $this->actingAs($customer, 'client')
            ->withHeaders(['x-access-token' => $this->buildClientAccessToken()]);
    }

    private function order(string $code, array $extra = [], ?Customer $customer = null): TestResponse
    {
        return $this->as($customer ?? $this->customer)->postJson('/v1/orders', array_merge([
            'product_id' => $this->product->uuid,
            'billing_cycle' => 'monthly',
            'coupon_code' => $code,
        ], $extra));
    }

    public function test_preview_returns_discount_capped_by_max_discount(): void
    {
        $this->coupon(['value' => 50, 'max_discount' => 20_000]);

        $this->as($this->customer)->postJson('/v1/orders/coupon-preview', [
            'product_id' => $this->product->uuid,
            'billing_cycle' => 'monthly',
            'coupon_code' => ' sale10 ',
        ])->assertOk()
            ->assertJsonPath('data.discount', 20_000)
            ->assertJsonPath('data.total', 80_000);
    }

    public function test_order_stores_discount_on_order_invoice_and_charges_discounted_total(): void
    {
        Bus::fake();
        $this->coupon();

        $response = $this->order('SALE10', ['discount_amount' => 99_999, 'total' => 1, 'price' => 1])
            ->assertCreated();

        $order = Order::where('order_num', $response->json('data.order.order_num'))->firstOrFail();
        $this->assertSame(100_000, (int) $order->sub_total);
        $this->assertSame(10_000, (int) $order->discount_amount);
        $this->assertSame(90_000, (int) $order->total);
        $this->assertSame('SALE10', $order->coupon_code);
        $this->assertSame(10_000, (int) $order->invoice->discount_amount);
        $this->assertSame(90_000, (int) $order->invoice->total);
        $this->assertSame(100_000, (int) $order->invoice->sub_total);
        $this->assertSame('SALE10', $order->invoice->coupon_code);
        $this->assertSame(1, CouponRedemption::where('order_id', $order->id)->whereNull('released_at')->count());

        app(OrderService::class)->pay($order->fresh(['invoice', 'customer']), 'balance');
        $this->assertSame(10_000_000 - 90_000, $this->customer->fresh()->total);
    }

    public function test_client_cannot_override_price_without_coupon(): void
    {
        Bus::fake();

        $response = $this->order('', ['coupon_code' => null, 'discount_amount' => 50_000, 'total' => 1])->assertCreated();

        $order = Order::where('order_num', $response->json('data.order.order_num'))->firstOrFail();
        $this->assertSame(0, (int) $order->discount_amount);
        $this->assertSame(100_000, (int) $order->total);
    }

    public function test_expired_and_not_started_and_inactive_codes_are_rejected(): void
    {
        $this->coupon(['code' => 'OLD', 'ends_at' => now()->subDay()]);
        $this->coupon(['code' => 'SOON', 'starts_at' => now()->addDay()]);
        $this->coupon(['code' => 'OFF', 'is_active' => false]);

        foreach (['OLD', 'SOON', 'OFF', 'MISSING'] as $code) {
            $this->order($code)->assertStatus(422);
        }
        $this->assertSame(0, Order::count());
    }

    public function test_scope_and_minimum_order_are_enforced(): void
    {
        $this->coupon(['code' => 'HOST', 'product_types' => ['hosting']]);
        $this->coupon(['code' => 'CYCLE', 'billing_cycles' => ['annually']]);
        $this->coupon(['code' => 'BIG', 'min_order' => 500_000]);
        $this->coupon(['code' => 'RENEW', 'applies_to' => Coupon::APPLIES_RENEWAL]);
        $this->coupon(['code' => 'OTHERPROD', 'product_ids' => [$this->product->id + 999]]);

        foreach (['HOST', 'CYCLE', 'BIG', 'RENEW', 'OTHERPROD'] as $code) {
            $this->order($code)->assertStatus(422);
        }
        $this->assertSame(0, Order::count());
    }

    public function test_usage_limit_is_enforced_across_customers(): void
    {
        Bus::fake();
        $this->coupon(['usage_limit' => 1]);
        $other = Customer::factory()->create(['total' => 10_000_000]);

        $this->order('SALE10')->assertCreated();
        $this->order('SALE10', [], $other)->assertStatus(422)
            ->assertJsonPath('message', 'Mã giảm giá đã hết lượt sử dụng.');
    }

    public function test_per_customer_limit_is_enforced(): void
    {
        Bus::fake();
        $this->coupon(['per_customer_limit' => 1]);

        $first = $this->order('SALE10')->assertCreated();
        Order::where('order_num', $first->json('data.order.order_num'))->update(['status' => OrderStatus::ACTIVE->value]);

        $this->order('SALE10')->assertStatus(422)
            ->assertJsonPath('message', 'Bạn đã dùng hết số lần cho phép của mã giảm giá này.');
    }

    public function test_cancelling_order_releases_redemption_and_restoring_reclaims_it(): void
    {
        Bus::fake();
        $this->coupon(['usage_limit' => 1]);

        $response = $this->order('SALE10')->assertCreated();
        $order = Order::where('order_num', $response->json('data.order.order_num'))->firstOrFail();

        $order->update(['status' => OrderStatus::CANCELLED->value]);
        $this->assertNotNull(CouponRedemption::where('order_id', $order->id)->value('released_at'));

        $order->update(['status' => OrderStatus::PENDING->value]);
        $this->assertNull(CouponRedemption::where('order_id', $order->id)->value('released_at'));
    }

    public function test_discount_never_drops_total_below_minimum_payable(): void
    {
        Bus::fake();
        $this->coupon(['code' => 'FREE', 'type' => Coupon::TYPE_FIXED, 'value' => 5_000_000]);

        $this->order('FREE')->assertCreated();

        $this->assertSame(1_000, (int) Order::first()->invoice->total);
    }
}