<?php

declare(strict_types=1);

/*
 * This file is part of PHP CS Fixer.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *     Dariusz Rumiński <dariusz.ruminski@gmail.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

namespace PhpCsFixer\Tests\Tokenizer\Analyzer;

use PhpCsFixer\Tests\TestCase;
use PhpCsFixer\Tokenizer\Analyzer\Analysis\NamespaceAnalysis;
use PhpCsFixer\Tokenizer\Analyzer\NamespacesAnalyzer;
use PhpCsFixer\Tokenizer\Tokens;

/**
 * @author VeeWee <toonverwerft@gmail.com>
 *
 * @internal
 *
 * @covers \PhpCsFixer\Tokenizer\Analyzer\NamespacesAnalyzer
 */
final class NamespacesAnalyzerTest extends TestCase
{
    /**
     * @param list<NamespaceAnalysis> $expected
     *
     * @dataProvider provideNamespacesCases
     */
    public function testNamespaces(string $code, array $expected): void
    {
        $tokens = Tokens::fromCode($code);
        $analyzer = new NamespacesAnalyzer();

        self::assertSame(
            serialize($expected),
            serialize($analyzer->getDeclarations($tokens))
        );
    }

    public static function provideNamespacesCases(): iterable
    {
        yield ['<?php // no namespaces', [
            new NamespaceAnalysis(
                '',
                '',
                0,
                0,
                0,
                1
            ),
        ]];

        yield ['<?php namespace Foo\Bar;', [
            new NamespaceAnalysis(
                'Foo\Bar',
                'Bar',
                1,
                6,
                1,
                6
            ),
        ]];

        yield ['<?php namespace Foo\Bar{}; namespace Foo\Baz {};', [
            new NamespaceAnalysis(
                'Foo\Bar',
                'Bar',
                1,
                6,
                1,
                7
            ),
            new NamespaceAnalysis(
                'Foo\Baz',
                'Baz',
                10,
                16,
                10,
                17
            ),
        ]];

        yield [
            <<<'PHP'
                #!/usr/bin/php
                <?php
                return true;
                PHP,
            [
                new NamespaceAnalysis(
                    '',
                    '',
                    1,
                    1,
                    1,
                    5
                ),
            ],
        ];

        yield [
            'there is no namespace if there is no PHP code',
            [],
        ];
    }

    /**
     * @dataProvider provideGetNamespaceAtCases
     */
    public function testGetNamespaceAt(string $code, int $index, NamespaceAnalysis $expected): void
    {
        $tokens = Tokens::fromCode($code);
        $analyzer = new NamespacesAnalyzer();

        self::assertSame(
            serialize($expected),
            serialize($analyzer->getNamespaceAt($tokens, $index))
        );
    }

    /**
     * @return iterable<array{string, int, NamespaceAnalysis}>
     */
    public static function provideGetNamespaceAtCases(): iterable
    {
        yield [
            '<?php // no namespaces',
            1,
            new NamespaceAnalysis(
                '',
                '',
                0,
                0,
                0,
                1
            ),
        ];

        yield [
            '<?php namespace Foo\Bar;',
            5,
            new NamespaceAnalysis(
                'Foo\Bar',
                'Bar',
                1,
                6,
                1,
                6
            ),
        ];

        yield [
            '<?php namespace Foo\Bar{}; namespace Foo\Baz {};',
            5,
            new NamespaceAnalysis(
                'Foo\Bar',
                'Bar',
                1,
                6,
                1,
                7
            ),
        ];

        yield [
            '<?php namespace Foo\Bar{}; namespace Foo\Baz {};',
            13,
            new NamespaceAnalysis(
                'Foo\Baz',
                'Baz',
                10,
                16,
                10,
                17
            ),
        ];
    }

    public function testInvalidIndex(): void
    {
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage('Token index 666 does not exist.');

        $analyzer = new NamespacesAnalyzer();
        $analyzer->getNamespaceAt(new Tokens(), 666);
    }
}