<?php

namespace Engelsystem\Test\Unit;

use Engelsystem\Application;
use Engelsystem\Config\Config;
use Engelsystem\Container\Container;
use Engelsystem\Container\ServiceProvider;
use PHPUnit\Framework\TestCase;
use PHPUnit_Framework_MockObject_MockObject;
use Psr\Container\ContainerInterface;
use ReflectionClass;

class ApplicationTest extends TestCase
{
    /**
     * @covers \Engelsystem\Application::__construct
     * @covers \Engelsystem\Application::registerBaseBindings
     */
    public function testConstructor()
    {
        $app = new Application('.');

        $this->assertInstanceOf(Container::class, $app);
        $this->assertInstanceOf(ContainerInterface::class, $app);
        $this->assertSame($app, $app->get('app'));
        $this->assertSame($app, $app->get('container'));
        $this->assertSame($app, $app->get(Container::class));
        $this->assertSame($app, $app->get(Application::class));
        $this->assertSame($app, $app->get(ContainerInterface::class));
        $this->assertSame($app, Application::getInstance());
        $this->assertSame($app, Container::getInstance());
    }

    /**
     * @covers \Engelsystem\Application::setAppPath
     * @covers \Engelsystem\Application::registerPaths
     * @covers \Engelsystem\Application::path
     */
    public function testAppPath()
    {
        $app = new Application();

        $this->assertFalse($app->has('path'));

        $app->setAppPath('.');
        $this->assertTrue($app->has('path'));
        $this->assertTrue($app->has('path.config'));
        $this->assertTrue($app->has('path.lang'));

        $this->assertEquals(realpath('.'), $app->path());
        $this->assertEquals(realpath('.') . '/config', $app->get('path.config'));

        $app->setAppPath('./../');
        $this->assertEquals(realpath('../') . '/config', $app->get('path.config'));
    }

    /**
     * @covers \Engelsystem\Application::register
     */
    public function testRegister()
    {
        $app = new Application();

        $serviceProvider = $this->mockServiceProvider($app, ['register']);
        $serviceProvider->expects($this->once())
            ->method('register');

        $app->register($serviceProvider);

        $anotherServiceProvider = $this->mockServiceProvider($app, ['register', 'boot']);
        $anotherServiceProvider->expects($this->once())
            ->method('register');
        $anotherServiceProvider->expects($this->once())
            ->method('boot');

        $app->bootstrap();
        $app->register($anotherServiceProvider);
    }

    /**
     * @covers \Engelsystem\Application::register
     */
    public function testRegisterBoot()
    {
        $app = new Application();
        $app->bootstrap();

        $serviceProvider = $this->mockServiceProvider($app, ['register', 'boot']);
        $serviceProvider->expects($this->once())
            ->method('register');
        $serviceProvider->expects($this->once())
            ->method('boot');

        $app->register($serviceProvider);
    }

    /**
     * @covers \Engelsystem\Application::register
     */
    public function testRegisterClassName()
    {
        $app = new Application();

        $mockClassName = $this->getMockClass(ServiceProvider::class);
        $serviceProvider = $this->getMockBuilder($mockClassName)
            ->setConstructorArgs([$app])
            ->setMethods(['register'])
            ->getMock();

        $serviceProvider->expects($this->once())
            ->method('register');

        $app->instance($mockClassName, $serviceProvider);
        $app->register($mockClassName);
    }

    /**
     * @covers \Engelsystem\Application::bootstrap
     * @covers \Engelsystem\Application::isBooted
     */
    public function testBootstrap()
    {
        /** @var PHPUnit_Framework_MockObject_MockObject|Application $app */
        $app = $this->getMockBuilder(Application::class)
            ->setMethods(['register'])
            ->getMock();

        $serviceProvider = $this->mockServiceProvider($app, ['boot']);
        $serviceProvider->expects($this->once())
            ->method('boot');

        $app->expects($this->once())
            ->method('register')
            ->with($serviceProvider);

        $config = $this->getMockBuilder(Config::class)
            ->getMock();

        $config->expects($this->once())
            ->method('get')
            ->with('providers')
            ->willReturn([$serviceProvider]);

        $property = (new ReflectionClass($app))->getProperty('serviceProviders');
        $property->setAccessible(true);
        $property->setValue($app, [$serviceProvider]);

        $app->bootstrap($config);

        $this->assertTrue($app->isBooted());

        // Run bootstrap another time to ensure that providers are registered only once
        $app->bootstrap($config);
    }

    /**
     * @param Application $app
     * @param array       $methods
     * @return PHPUnit_Framework_MockObject_MockObject|ServiceProvider
     */
    protected function mockServiceProvider(Application $app, $methods = [])
    {
        $serviceProvider = $this->getMockBuilder(ServiceProvider::class)
            ->setConstructorArgs([$app])
            ->setMethods($methods)
            ->getMockForAbstractClass();

        return $serviceProvider;
    }
}