<?php

use PHPUnit\Framework\TestCase;
use Tests\Aspects\ModifyingAspect;
use Tests\Classes\ModifyingClass;

final class ReturnModificationTest extends TestCase
{
    private ModifyingClass $instance;

    protected function setUp(): void
    {
        $this->instance = new ModifyingClass();
        ModifyingAspect::reset();
    }

    public function testAfterReturningOriginalValueDoesNotModifyResult(): void
    {
        ModifyingAspect::$modifier = fn($result) => $result;

        $result = $this->instance->getValue();

        $this->assertEquals(42, $result);
    }

    public function testAfterCanModifyIntegerResult(): void
    {
        ModifyingAspect::$modifier = fn($result) => $result * 2;

        $result = $this->instance->getValue();

        $this->assertEquals(84, $result);
    }

    public function testAfterCanModifyStringResult(): void
    {
        ModifyingAspect::$modifier = fn($result) => strtoupper($result);

        $result = $this->instance->getString();

        $this->assertEquals('ORIGINAL', $result);
    }

    public function testAfterCanIncrementIntegerResult(): void
    {
        ModifyingAspect::$modifier = fn($result) => $result + 100;

        $result = $this->instance->getValue();

        $this->assertEquals(142, $result);
    }

    public function testAfterCanModifyArrayResult(): void
    {
        ModifyingAspect::$modifier = fn($result) => array_merge($result, ['added' => 'new']);

        $result = $this->instance->getArray();

        $this->assertEquals(['key' => 'value', 'added' => 'new'], $result);
    }

    public function testAfterCanFilterArrayResult(): void
    {
        ModifyingAspect::$modifier = fn($result) => array_filter($result, fn($v) => $v !== 'value');

        $result = $this->instance->getArray();

        $this->assertEquals([], $result);
    }

    public function testMultipleCallsWithDifferentModifiers(): void
    {
        ModifyingAspect::$modifier = fn($result) => $result * 2;
        $result1 = $this->instance->getValue();

        ModifyingAspect::$modifier = fn($result) => $result + 10;
        $result2 = $this->instance->getValue();

        $this->assertEquals(84, $result1);
        $this->assertEquals(52, $result2);
    }

    public function testNoModifierReturnsOriginalValue(): void
    {
        // ModifyingAspect::$modifier is null, so after() returns original value

        $result = $this->instance->getValue();

        $this->assertEquals(42, $result);
    }
}