<?php

declare( strict_types=1 );

namespace Rowbot\URL\Tests;

use ArrayObject;
use Countable;
use Generator;
use PHPUnit\Framework\Attributes\DataProvider;
use PHPUnit\Framework\TestCase;
use Rowbot\URL\Exception\TypeError;
use Rowbot\URL\URL;
use Rowbot\URL\URLSearchParams;

class URLSearchParamsTest extends TestCase {
	public function testCloningStandaloneURLSearchParams(): void {
		$query  = new URLSearchParams( 'foo=bar' );
		$query2 = clone $query;
		$query2->append( 'foo', 'bar' );

		self::assertSame( 'foo=bar', $query->toString() );
	}

	public function testCloningAttachedURLSearchParams(): void {
		$url   = new URL( 'http://example.com/?foo=bar' );
		$query = clone $url->searchParams;
		$query->append( 'foo', 'bar' );

		self::assertSame( '?foo=bar', $url->search );
		self::assertSame( 'foo=bar', $url->searchParams->toString() );
	}

	public function testIterationKey(): void {
		$query  = new URLSearchParams( 'foo=bar&qux=baz' );
		$result = [
			[ 'foo', 'bar' ],
			[ 'qux', 'baz' ],
		];

		foreach ( $query as $index => $pair ) {
			self::assertSame( $result[ $index ], $pair );
		}
	}

	public static function getInvalidIteratorInput(): array {
		$generator = static function (): Generator {
			yield 'foo';
			yield 'bar';
		};
		$anonClass = new class ( $generator() ) implements Countable {
			/**
			 * @var Generator
			 */
			public $foo;

			public function __construct( Generator $foo ) {
				$this->foo = $foo;
			}

			public function count(): int {
				return 2;
			}
		};

		return [
			'sequences not equal to 2' => [ [ [ 'foo', 'bar' ], [ 'baz' ] ] ],
			'non-iterable'             => [ new ArrayObject( [ 'x', 'y' ] ) ],
			'generator'                => [ [ $generator() ] ],
			'invalid-name'             => [ [ [ null, 'foo' ] ] ],
			'invalid-value'            => [ [ [ 'foo', null ] ] ],
			'countable-only'           => [ [ [ $anonClass ] ] ],
			'invalid-property-value'   => [ $anonClass ],
			'iterable-non-countable'   => [ new ArrayObject( [ $generator(), $generator() ] ) ],
		];
	}

	/**
	 * @param  mixed[]|object  $input
	 */
	public function testInvalidIteratorInput( $input ): void {
		$this->expectException( TypeError::class );
		new URLSearchParams( $input );
	}

	public static function unhandledInputProvider(): array {
		return [
			[
				static function (): void {
					return;
				},
			],
		];
	}

	public function testUnhandledInputDoesNothing( $input ): void {
		$params = new URLSearchParams( $input );
		self::assertFalse( $params->valid() );
	}

	public function testInvalidIteratorReturnsNull(): void {
		$params = new URLSearchParams();
		self::assertNull( $params->current() );
		self::assertFalse( $params->valid() );
	}

	public function testSortingPairWithEmptyName(): void {
		$params = new URLSearchParams( '=foo&x=bar&c=bar' );
		$params->sort();
		self::assertSame( '=foo&c=bar&x=bar', $params->toString() );
	}
}