<?php

declare(strict_types=1);

namespace LIT\MCP\Tests\Unit\Compatibility;

use LIT\MCP\Compatibility\Capability;
use LIT\MCP\Compatibility\Problem;
use LIT\MCP\Integrations\Divi\Release\DiviFeature;
use PHPUnit\Framework\TestCase;

final class ProblemTest extends TestCase
{
    public function testOnlyCallMirrorConstantAndResolverAreHard(): void
    {
        $hard = [];
        foreach (['call', 'signature', 'mirror', 'constant', 'reference-missing', 'resolver'] as $kind) {
            $hard[$kind] = (new Problem('x', [DiviFeature::PageWrite], $kind))->isHard();
        }

        self::assertSame(
            ['call' => true, 'signature' => false, 'mirror' => true, 'constant' => true,
                'reference-missing' => false, 'resolver' => true],
            $hard
        );
    }

    public function testConcernsItsFeaturesAndWithoutFeaturesEveryFeature(): void
    {
        $problem = new Problem('x', [DiviFeature::PageWrite, DiviFeature::ThemeBuilderWrite], Problem::CALL);
        self::assertTrue($problem->concerns(DiviFeature::ThemeBuilderWrite));
        self::assertFalse($problem->concerns(DiviFeature::PageRead));

        $unassigned = new Problem('x', [], Problem::CALL);
        foreach (DiviFeature::cases() as $feature) {
            self::assertTrue($unassigned->concerns($feature), $feature->value);
        }
    }

    public function testRoundTripsThroughTheCacheFormat(): void
    {
        $problem = new Problem('Seiten: Nachbau von a() – x', [DiviFeature::PageWrite], Problem::MIRROR);

        self::assertSame(
            ['label' => 'Seiten: Nachbau von a() – x', 'kind' => 'mirror', 'features' => ['page-write']],
            $problem->toArray()
        );
        self::assertEquals($problem, Problem::fromArray($problem->toArray(), DiviFeature::tryFrom(...)));
    }

    public function testFromArrayRefusesAnythingElse(): void
    {
        foreach ([
            'no array' => 'Seiten: x()',
            'no label' => ['kind' => 'call', 'features' => []],
            'unknown kind' => ['label' => 'x', 'kind' => 'other', 'features' => []],
            'unknown feature' => ['label' => 'x', 'kind' => 'call', 'features' => ['page-delete']],
            'features no list' => ['label' => 'x', 'kind' => 'call', 'features' => 'page-write'],
        ] as $case => $row) {
            self::assertNull(Problem::fromArray($row, DiviFeature::tryFrom(...)), $case);
        }
    }

    public function testFromArrayResolvesFeaturesThroughTheLookupClosure(): void
    {
        $pods = new class implements Capability {
            public function id(): string
            {
                return 'pods-x';
            }

            public function label(): string
            {
                return 'Pods X';
            }

            public function isWrite(): bool
            {
                return false;
            }
        };
        $lookup = static fn (string $id): ?Capability => $id === 'pods-x' ? $pods : null;

        $problem = Problem::fromArray(['label' => 'x', 'kind' => 'call', 'features' => ['pods-x']], $lookup);
        self::assertNotNull($problem);
        self::assertSame([$pods], $problem->features);
        self::assertTrue($problem->concerns($pods));

        self::assertNull(
            Problem::fromArray(['label' => 'x', 'kind' => 'call', 'features' => ['pods-x', 'page-read']], $lookup),
            'one unknown ID discards the problem'
        );
    }
}