<?php
/**
 * This file is part of Lcobucci\JWT, a simple library to handle JWT and JWS
 *
 * @license http://opensource.org/licenses/BSD-3-Clause BSD-3-Clause
 */

namespace Lcobucci\JWT\Signer;

use Lcobucci\JWT\Signer\Ecdsa\KeyParser;
use Mdanter\Ecc\Crypto\Signature\Signature;
use Mdanter\Ecc\Crypto\Signature\Signer;
use Mdanter\Ecc\Crypto\Key\PrivateKeyInterface;
use Mdanter\Ecc\Crypto\Key\PublicKeyInterface;
use Mdanter\Ecc\Math\MathAdapterInterface as Adapter;
use Mdanter\Ecc\Primitives\PointInterface;
use Mdanter\Ecc\Random\RandomNumberGeneratorInterface;

/**
 * @author Luís Otávio Cobucci Oblonczyk <lcobucci@gmail.com>
 * @since 2.1.0
 */
class EcdsaTest extends \PHPUnit_Framework_TestCase
{
    /**
     * @var Adapter|\PHPUnit_Framework_MockObject_MockObject
     */
    private $adapter;

    /**
     * @var Signer|\PHPUnit_Framework_MockObject_MockObject
     */
    private $signer;

    /**
     * @var RandomNumberGeneratorInterface|\PHPUnit_Framework_MockObject_MockObject
     */
    private $randomGenerator;

    /**
     * @var KeyParser|\PHPUnit_Framework_MockObject_MockObject
     */
    private $parser;

    /**
     * @before
     */
    public function createDependencies()
    {
        $this->adapter = $this->getMock(Adapter::class);
        $this->signer = $this->getMock(Signer::class, [], [$this->adapter]);
        $this->randomGenerator = $this->getMock(RandomNumberGeneratorInterface::class);
        $this->parser = $this->getMock(KeyParser::class, [], [], '', false);
    }

    /**
     * @return Ecdsa
     */
    private function getSigner()
    {
        $signer = $this->getMockForAbstractClass(
            Ecdsa::class,
            [$this->adapter, $this->signer, $this->parser]
        );

        $signer->method('getSignatureLength')
               ->willReturn(64);

        $signer->method('getAlgorithm')
               ->willReturn('sha256');

        $signer->method('getAlgorithmId')
               ->willReturn('ES256');

        return $signer;
    }

    /**
     * @test
     *
     * @covers Lcobucci\JWT\Signer\Ecdsa::__construct
     */
    public function constructShouldConfigureDependencies()
    {
        $signer = $this->getSigner();

        $this->assertAttributeSame($this->adapter, 'adapter', $signer);
        $this->assertAttributeSame($this->signer, 'signer', $signer);
        $this->assertAttributeSame($this->parser, 'parser', $signer);
    }

    /**
     * @test
     *
     * @uses Lcobucci\JWT\Signer\Ecdsa::__construct
     * @uses Lcobucci\JWT\Signer\Key
     *
     * @covers Lcobucci\JWT\Signer\Ecdsa::createHash
     * @covers Lcobucci\JWT\Signer\Ecdsa::createSigningHash
     * @covers Lcobucci\JWT\Signer\Ecdsa::createSignatureHash
     */
    public function createHashShouldReturnAHashUsingPrivateKey()
    {
        $signer = $this->getSigner();
        $key = new Key('testing');
        $privateKey = $this->getMock(PrivateKeyInterface::class);
        $point = $this->getMock(PointInterface::class);

        $privateKey->method('getPoint')
                   ->willReturn($point);

        $point->method('getOrder')
              ->willReturn('1');

        $this->parser->expects($this->once())
                     ->method('getPrivateKey')
                     ->with($key)
                     ->willReturn($privateKey);

        $this->randomGenerator->expects($this->once())
                              ->method('generate')
                              ->with('1')
                              ->willReturn('123');

        $this->adapter->expects($this->once())
                      ->method('hexDec')
                      ->willReturn('123');

        $this->adapter->expects($this->exactly(2))
                      ->method('decHex')
                      ->willReturn('123');

        $this->signer->expects($this->once())
                     ->method('sign')
                     ->with($privateKey, $this->isType('string'), $this->isType('string'))
                     ->willReturn(new Signature('1234', '456'));

        $this->assertInternalType('string', $signer->createHash('testing', $key, $this->randomGenerator));
    }

    /**
     * @test
     *
     * @uses Lcobucci\JWT\Signer\Ecdsa::__construct
     * @uses Lcobucci\JWT\Signer\Key
     *
     * @covers Lcobucci\JWT\Signer\Ecdsa::doVerify
     * @covers Lcobucci\JWT\Signer\Ecdsa::createSigningHash
     * @covers Lcobucci\JWT\Signer\Ecdsa::extractSignature
     */
    public function doVerifyShouldDelegateToEcdsaSignerUsingPublicKey()
    {
        $signer = $this->getSigner();
        $key = new Key('testing');
        $publicKey = $this->getMock(PublicKeyInterface::class);

        $this->parser->expects($this->once())
                     ->method('getPublicKey')
                     ->with($key)
                     ->willReturn($publicKey);

        $this->adapter->expects($this->exactly(3))
                      ->method('hexDec')
                      ->willReturn('123');

        $this->signer->expects($this->once())
                     ->method('verify')
                     ->with($publicKey, $this->isInstanceOf(Signature::class), $this->isType('string'))
                     ->willReturn(true);

        $this->assertTrue($signer->doVerify('testing', 'testing2', $key));
    }
}