<?php declare(strict_types=1);

/*
 * This file is part of Composer.
 *
 * (c) Nils Adermann <naderman@naderman.de>
 *     Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Composer\Test\Command;

use Composer\Command\InitCommand;
use Composer\Util\Filesystem;
use Symfony\Component\Console\Tester\ApplicationTester;
use Composer\Command\RequireCommand;
use Symfony\Component\Console\Input\ArrayInput;
use Composer\Console\Application;
use Composer\Test\TestCase;
use Symfony\Component\Process\Process;

class RequireCommandTest extends TestCase
{
    /**
     * @var string
     */
    private $start_directory;
    private $working_directory;
    private $local_repository;

    public function setUp(): void
    {
        $this->local_repository = $this->getUniqueTmpDirectory();

        $repo_manifest = [
            'name' => 'testvendor/testpackage',
            'version' => '1.0.0',
            'type' => 'library',
            'autoload' => [
                'psr-4' => [
                    'TestVendor\\Testpackage\\' => 'src/',
                ]
            ]
        ];

        file_put_contents(
            $this->local_repository.'/composer.json',
            json_encode(
                $repo_manifest,
                JSON_UNESCAPED_SLASHES,
            )
        );

        $this->working_directory = $this->getUniqueTmpDirectory();

        $manifest = [
            'name' => 'test/something',
            'require' => (object) null,
            'repositories' => [
                [
                    'type' => 'path',
                    'url' => $this->local_repository,
                ],
                [
                    'packagist.org' => false
                ]
            ]
        ];

        file_put_contents(
            $this->working_directory.'/composer.json',
            json_encode($manifest, JSON_UNESCAPED_SLASHES)
        );

        $this->start_directory = getcwd();
    }

    protected function tearDown(): void
    {
        parent::tearDown();

        // Reset the working directory. Some commands leave the working
        // directory contaminated when they exit with an error.
        chdir($this->start_directory);

        $fs = new Filesystem();
        $fs->removeDirectory($this->working_directory);
        $fs->removeDirectory($this->local_repository);
    }

    /**
     * testcase: UC01-001
     */
    public function testInstallPackage(): void
    {
        // Arrange
        $application = new Application();
        $application->setAutoExit(false);
        $application->add(new RequireCommand());

        $local_repository_class_code = '<?php namespace TestVendor\\Testpackage { '
            . 'class TestClass { '
            . 'public function printTestClass() { echo "TestClass"; } } }';
        $local_repository_class_file_dir = $this->local_repository . '/src';
        $local_repository_class_file = $local_repository_class_file_dir . '/TestClass.php';

        mkdir($local_repository_class_file_dir, 0777, true);
        file_put_contents($local_repository_class_file, $local_repository_class_code);

        $check_autoload_code = 'include "./vendor/autoload.php";'
            . 'use TestVendor\\Testpackage\\TestClass;'
            . '(new TestClass())->printTestClass();';
        $check_autoload_process = new Process(['php', '-r', $check_autoload_code]);
        $check_autoload_process->setWorkingDirectory($this->working_directory);

        // Act
        $tester = new ApplicationTester($application);
        $tester->run([
            'command' => 'require',
            // Confirmation 1: provide dependency name of format vendor/package
            'packages' => [ 'testvendor/testpackage' ],
            '-d' =>  $this->working_directory,
        ]);

        $check_autoload_process->run();

        // Assert
        $output = $tester->getDisplay();

        // Confirmation 4: exit code 0
        $tester->assertCommandIsSuccessful();

        $this->assertStringContainsString('Installing testvendor/testpackage', $output);

        // Confirmation 2: dependency is present in vendor directory
        $this->assertTrue(file_exists($this->working_directory . '/vendor/testvendor/testpackage'));

        // Confirmation 3: dependency classes can be autoloaded
        $this->assertEquals(0, $check_autoload_process->getExitCode());
        $this->assertEquals('TestClass', $check_autoload_process->getOutput());
    }

    /**
     * testcase: UC01-002
     */
    public function testInstallPackageSaveToComposerJson(): void
    {
        // Arrange
        $application = new Application();
        $application->setAutoExit(false);
        $application->add(new RequireCommand());

        // Act
        $tester = new ApplicationTester($application);

        // Confirmation 1: Install dependency
        $tester->run([
            'command' => 'require',
            'packages' => [ 'testvendor/testpackage 1.0.0' ],
            '-d' =>  $this->working_directory,
        ]);

        // Assert
        $manifest = json_decode(
            file_get_contents($this->working_directory . '/composer.json'),
            true
        );

        // Confirmation 2: dependency has been added to composer.json
        $this->assertArrayHasKey('testvendor/testpackage', $manifest['require']);
        $this->assertEquals('1.0.0', $manifest['require']['testvendor/testpackage']);
    }

    /**
     * testcase: UC01-003
     */
    public function testInstallPackagesSaveToComposerLock(): void
    {
        // Arrange
        $application = new Application();
        $application->setAutoExit(false);
        $application->add(new RequireCommand());

        // Act
        $tester = new ApplicationTester($application);
        $tester->run([
            'command' => 'require',
            'packages' => [ 'testvendor/testpackage 1.0.0' ],
            '-d' =>  $this->working_directory,
        ]);

        // Assert
        $lockfile = json_decode(
            file_get_contents($this->working_directory . '/composer.lock'),
            true
        );
        $packages = $lockfile['packages'];
        $installed_package = null;
        foreach($packages as $package) {
            if ($package['name'] === 'testvendor/testpackage') {
                $installed_package = $package;
            }
        }

        $this->assertNotNull($installed_package);
        $this->assertEquals('1.0.0', $installed_package['version']);
    }

    /**
     * testcase: UC01-004
     */
    public function testInstallMisspelledPackage(): void
    {
        // Arrange
        $application = new Application();
        $application->setAutoExit(false);
        $application->add(new RequireCommand());

        // Act
        $tester = new ApplicationTester($application);
        $tester->run([
            'command' => 'require',
            'packages' => [ 'testvendor/testpcakage 1.0.0' ],
            '-d' =>  $this->working_directory,
        ]);

        // Assert
        $this->assertNotEquals(0, $tester->getStatusCode());
        $output = $tester->getDisplay();

        $this->assertStringContainsString(
            'Your requirements could not be resolved to an installable set of packages.',
            $output
        );

        $this->assertStringContainsString(
            'requires testvendor/testpcakage, it could not be found in any version',
            $output
        );

        $this->assertStringContainsString(
            '- A typo in the package name',
            $output
        );
    }

    /**
     * testcase: UC01-005
     */
    public function testInstallNoPackage(): void
    {
        // Arrange
        $application = new Application();
        $application->setAutoExit(false);
        $application->add(new RequireCommand());

        // Act
        $tester = new ApplicationTester($application);
        $tester->run([
            'command' => 'require',
            'packages' => [ '-' ],
            '-d' =>  $this->working_directory,
        ]);

        // Assert
        $this->assertNotEquals(0, $tester->getStatusCode());
        $output = $tester->getDisplay();

        $this->assertStringContainsString(
            'Could not find package -.',
            $output
        );

        // Assert
        $manifest = json_decode(
            file_get_contents($this->working_directory . '/composer.json'),
            true
        );

        // Confirmation 2: dependency has not been added to composer.json
        $this->assertEquals(0, count($manifest['require']));
    }

    /**
     * testcase: UC01-006
     */
    public function testInstallLongPackageName(): void
    {
        // Arrange
        $application = new Application();
        $application->setAutoExit(false);
        $application->add(new RequireCommand());

        $package_name = $this->generateRandomString(8000);

        // Act
        $tester = new ApplicationTester($application);
        $tester->run([
            'command' => 'require',
            'packages' => [ $package_name ],
            '-d' =>  $this->working_directory,
        ]);

        // Assert
        $this->assertNotEquals(0, $tester->getStatusCode());
        $output = $tester->getDisplay();

        $this->assertStringContainsString(
            'Could not find a matching version of package ',
            $output
        );
    }


    private function generateRandomString(int $length): string {
        $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
        $charactersLength = strlen($characters);
        $randomString = '';
        for ($i = 0; $i < $length; $i++) {
            $randomString .= $characters[rand(0, $charactersLength - 1)];
        }
        return $randomString;
    }
}