<?php

declare( strict_types=1 );

namespace Rowbot\Punycode\Test;

use PHPUnit\Framework\TestCase;
use Rowbot\Punycode\Exception\InvalidInputException;
use Rowbot\Punycode\Exception\OutputSizeExceededException;
use Rowbot\Punycode\Punycode;

use function mb_strlen;
use function preg_match;

class PunycodeTest extends TestCase {
	/**
	 * @see https://tools.ietf.org/html/rfc3492#section-7.1
	 *
	 * @return array<int, array<int, string>>
	 */
	public static function punycodeProvider(): array {
		return [
			[
				'ليهمابتكلموشعربي؟',
				'egbpdaj6bu4bxfgehfvwxn',
				'Arabic (Egyptian)',
			],
			[
				'他们为什么不说中文',
				'ihqwcrb4cv8a8dqg056pqjye',
				'Chinese (simplified)',
			],
			[
				'他們爲什麽不說中文',
				'ihqwctvzc91f659drss3x8bo0yb',
				'Chinese (traditional)',
			],
			[
				'Pročprostěnemluvíčesky',
				'Proprostnemluvesky-uyb24dma41a',
				'Czech',
			],
			[
				'למההםפשוטלאמדבריםעברית',
				'4dbcagdahymbxekheh6e0a7fei0b',
				'Hebrew',
			],
			[
				'यहलोगहिन्दीक्योंनहींबोलसकतेहैं',
				'i1baa7eci9glrd9b2ae1bj0hfcgg6iyaf8o0a1dig0cd',
				'Hindi (Devanagari)',
			],
			[
				'なぜみんな日本語を話してくれないのか',
				'n8jok5ay5dzabd5bym9f0cm5685rrjetr6pdxa',
				'Japanese (kanji and hiragana)',
			],
			[
				'세계의모든사람들이한국어를이해한다면얼마나좋을까',
				'989aomsvi5e83db1d2a355cv1e0vak1dwrv93d5xbh15a0dt30a5jpsd879ccm6fea98c',
				'Korean (Hangul syllables)',
			],
			[
				'почемужеонинеговорятпорусски',
				'b1abfaaepdrnnbgefbadotcwatmq2g4l',
				'Russian (Cyrillic)',
			],
			[
				'PorquénopuedensimplementehablarenEspañol',
				'PorqunopuedensimplementehablarenEspaol-fmd56a',
				'Spanish',
			],
			[
				'TạisaohọkhôngthểchỉnóitiếngViệt',
				'TisaohkhngthchnitingVit-kjcr8268qyxafd2f1b9g',
				'Vietnamese',
			],
			[
				'3年B組金八先生',
				'3B-ww4c5e180e575a65lsy2b',
				'',
			],
			[
				'安室奈美恵-with-SUPER-MONKEYS',
				'-with-SUPER-MONKEYS-pc58ag80a8qai00g7n9n',
				'',
			],
			[
				'Hello-Another-Way-それぞれの場所',
				'Hello-Another-Way--fc4qua05auwb3674vfr0b',
				'',
			],
			[
				'ひとつ屋根の下2',
				'2-u9tlzr9756bt3uc0v',
				'',
			],
			[
				'MajiでKoiする5秒前',
				'MajiKoi5-783gue6qz075azm5e',
				'',
			],
			[
				'パフィーdeルンバ',
				'de-jg4avhby1noc0d',
				'',
			],
			[
				'そのスピードで',
				'd9juau41awczczp',
				'',
			],
			[
				'-> $1.00 <-',
				'-> $1.00 <--',
				'',
			],
		];
	}

	/**
	 * @dataProvider punycodeProvider
	 */
	public function testEncode( string $decoded, string $encoded, string $comment ): void {
		self::assertSame( $encoded, Punycode::encode( $decoded ), $comment );
	}

	/**
	 * @dataProvider punycodeProvider
	 */
	public function testDecode( string $decoded, string $encoded, string $comment ): void {
		self::assertSame( $decoded, Punycode::decode( $encoded ), $comment );
	}

	public function encodeMaxLengthDataProvider(): array {
		return array_filter( $this->punycodeProvider(), static function ( array $data ): bool {
			return mb_strlen( $data[1], 'utf-8' ) > 10;
		} );
	}

	/**
	 * @dataProvider encodeMaxLengthDataProvider
	 */
	public function testEncodeMaxLength( string $decoded, string $encoded, string $comment ): void {
		$this->expectException( OutputSizeExceededException::class );
		Punycode::encode( $decoded, 10 );
	}

	/**
	 * @return array<int, array<int, string>>
	 */
	public function decodeMaxLengthDataProvider(): array {
		return array_filter( $this->punycodeProvider(), static function ( array $data ): bool {
			return mb_strlen( $data[0], 'utf-8' ) > 10;
		} );
	}

	/**
	 * @dataProvider decodeMaxLengthDataProvider
	 */
	public function testDecodeMaxLength( string $decoded, string $encoded, string $comment ): void {
		$this->expectException( OutputSizeExceededException::class );
		Punycode::decode( $encoded, 10 );
	}

	/**
	 * @return array<int, array<int, string>>
	 */
	public function nonAsciiDataProvider(): array {
		return array_filter( $this->punycodeProvider(), static function ( array $data ): bool {
				return preg_match( '/[^\x00-\x7F]/', $data[0] ) === 1;
			} ) + [
			       [ "abc\u{FFFD}", '', 'Mixed ASCII and non-ASCII' ],
		       ];
	}

	/**
	 * @dataProvider nonAsciiDataProvider
	 */
	public function testDecodeOnlyAcceptsAscii( string $decoded, string $encoded, string $comment ): void {
		$this->expectException( InvalidInputException::class );
		Punycode::decode( $decoded );
	}

	public function testCaseFlags(): void {
		$c = [ true, true, true ];
		$e = Punycode::encode( 'abc', null, $c );
		self::assertSame( 'ABC-', $e );

		$c = [ false, false, false ];
		$d = Punycode::decode( $e, null, $c );
		self::assertSame( [ true, true, true ], $c );
		self::assertSame( 'ABC', $d );

		$c = [];
		$d = Punycode::decode( $e, null, $c );
		self::assertSame( [ true, true, true ], $c );
		self::assertSame( 'ABC', $d );
	}
}