<?php

namespace Tests\App\Controllers\View;

use App\Controllers\View\RefundController;
use App\Libraries\RefundEligibilityService;
use CodeIgniter\Test\CIUnitTestCase;

class RefundRequestStub
{
    public function __construct(private array $post = [])
    {
    }

    public function getPost(?string $key = null)
    {
        if ($key === null) {
            return $this->post;
        }

        return $this->post[$key] ?? null;
    }

    public function getFile(string $name)
    {
        return null;
    }
}

class TestableRefundController extends RefundController
{
    public function __construct()
    {
    }

    public function setRequestObject($request): self
    {
        $this->request = $request;
        return $this;
    }

    public function setResponseObject($response): self
    {
        $this->response = $response;
        return $this;
    }
}

class RefundEligibilityForControllerHarness extends RefundEligibilityService
{
    public function __construct(private int $completedPayoutCents)
    {
    }

    public function getCompletedPayoutTotalCentsForRefund(int $refundId): int
    {
        return $this->completedPayoutCents;
    }
}

class RefundControllerRegressionTest extends CIUnitTestCase
{
    public function testRequestRefundReadsRequestTypeFromPostBody(): void
    {
        $controller = $this->controllerWithPost([
            'parent_id' => '123',
            'amount' => '25.00',
            'request_type' => 'unsupported',
        ]);

        $response = $controller->requestRefund();

        $this->assertSame(['error' => 'Invalid refund request type.'], $this->jsonResponse($response));
    }

    public function testPayRefundRouteArgumentIsAcceptedBeforePostRefundId(): void
    {
        $controller = $this->controllerWithPost([
            'paid_amount' => '10.00',
            'payment_method' => 'Wire',
        ]);

        $response = $controller->payRefund(77);

        $this->assertSame(['error' => 'Invalid refund payment method.'], $this->jsonResponse($response));
    }

    public function testCheckRefundRequiresCheckNumberBeforeDatabaseWrite(): void
    {
        $controller = $this->controllerWithPost([
            'refund_id' => '77',
            'paid_amount' => '10.00',
            'payment_method' => 'Check',
        ]);

        $response = $controller->updatePayment();

        $this->assertSame(['error' => 'Check number is required for check refunds.'], $this->jsonResponse($response));
    }

    public function testUpdateStatusAcceptsRouteRefundId(): void
    {
        $controller = $this->controllerWithPost([
            'status' => 'Voided',
            'reason' => 'duplicate request',
        ]);

        $response = $controller->updateStatus(77);

        $this->assertSame(['error' => 'Invalid status update request.'], $this->jsonResponse($response));
    }

    public function testReversePayoutRequiresReasonBeforeDatabaseWrite(): void
    {
        $controller = $this->controllerWithPost([
            'idempotency_key' => 'reverse-77',
        ]);

        $response = $controller->reversePayout(77);

        $this->assertSame(['error' => 'Reversal reason is required.'], $this->jsonResponse($response));
    }

    public function testReversePayoutRequiresIdempotencyKeyBeforeDatabaseWrite(): void
    {
        $controller = $this->controllerWithPost([
            'reason' => 'wrong payout amount',
        ]);

        $response = $controller->reversePayout(77);

        $this->assertSame(['error' => 'Missing reversal idempotency key.'], $this->jsonResponse($response));
    }

    public function testReversePayoutRejectsNonPositiveAmountBeforeDatabaseWrite(): void
    {
        $controller = $this->controllerWithPost([
            'reason' => 'wrong payout amount',
            'idempotency_key' => 'reverse-77',
            'amount' => '0.00',
        ]);

        $response = $controller->reversePayout(77);

        $this->assertSame(['error' => 'Reversal amount must be greater than zero.'], $this->jsonResponse($response));
    }

    public function testApprovedRefundRecalculationCannotDropBelowCompletedPayouts(): void
    {
        $controller = $this->controllerWithPost([]);
        $property = (new \ReflectionClass(RefundController::class))->getProperty('refundEligibilityService');
        $property->setAccessible(true);
        $property->setValue($controller, new RefundEligibilityForControllerHarness(2500));

        $method = (new \ReflectionClass(RefundController::class))->getMethod('buildRefundRecalculationUpdate');
        $method->setAccessible(true);
        $update = $method->invoke($controller, [
            'id' => 55,
            'status' => 'Approved',
        ], 10.00);

        $this->assertEqualsWithDelta(25.0, (float)$update['refund_amount'], 0.0001);
        $this->assertSame(2500, $update['approved_amount_cents']);
        $this->assertSame('requires_review', $update['reconciliation_status']);
        $this->assertStringContainsString('Completed payouts', $update['reconciliation_reason']);
    }

    private function controllerWithPost(array $post): TestableRefundController
    {
        return (new TestableRefundController())
            ->setRequestObject(new RefundRequestStub($post))
            ->setResponseObject(service('response'));
    }

    private function jsonResponse($response): array
    {
        return json_decode($response->getBody(), true, 512, JSON_THROW_ON_ERROR);
    }
}