<?php
/**
 * FuzeWorks Async Library
 *
 * The FuzeWorks PHP FrameWork
 *
 * Copyright (C) 2013-2020 TechFuze
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * @author    TechFuze
 * @copyright Copyright (c) 2013 - 2020, TechFuze. (http://techfuze.net)
 * @license   https://opensource.org/licenses/MIT MIT License
 *
 * @link  http://techfuze.net/fuzeworks
 * @since Version 1.0.0
 *
 * @version Version 1.0.0
 */

use FuzeWorks\Async\Handler;
use FuzeWorks\Async\ShellWorker;
use FuzeWorks\Async\Task;
use FuzeWorks\Async\TaskStorage;
use FuzeWorks\Events;
use PHPUnit\Framework\TestCase;

class ShellWorkerTest extends TestCase
{

    /**
     * @var ShellWorker
     */
    protected $shellWorker;

    /**
     * @var TaskStorage
     */
    protected $taskStorage;

    public function setUp(): void
    {
        // Load the TaskStorage so temporary tasks can be stored
        // This system uses DummyTaskStorage because Redis can't serialize the Mock Handlers. Doesn't matter much anyway.
        $this->taskStorage = new TaskStorage\DummyTaskStorage([]);
        $this->shellWorker = new ShellWorker($this->taskStorage);
        $this->taskStorage->reset();

        // Clear events
        Events::$listeners = [];
    }

    public function testClass()
    {
        $this->assertInstanceOf(ShellWorker::class, $this->shellWorker);
    }

    /* ---------------------------------- Writing and reading tasks ----------------------- */

    // @todo Add lots of tests and amend ShellWorker to return results

    /**
     * @depends testClass
     */
    public function testUseHandler()
    {
        // First prepare a Mock Handler
        $mockHandler = $this->createMock(Handler::class);
        $mockHandler->expects($this->exactly(2))->method('getParentHandler')->willReturn(null);
        $mockHandler->expects($this->once())
            ->method('primaryHandler')
            ->with($this->callback(function($subject){return $subject instanceof Task;}))
            ->willReturn(true);
        $mockHandler->expects($this->once())
            ->method('postHandler')
            ->with($this->callback(function($subject){return $subject instanceof Task;}))
            ->willReturn(true);
        $mockHandler->expects($this->once())->method('getOutput')->willReturn('Some Output!');
        $mockHandler->expects($this->once())->method('getPostOutput')->willReturn('Post Output!');

        // Create a Dummy task
        $dummyTask = new Task('testUseHandler', $mockHandler);
        $this->taskStorage->addTask($dummyTask);

        // Run the task in ShellWorker
        $this->shellWorker->run($dummyTask, false);

        // And verify if the Output is correctly set
        $output = $this->taskStorage->readTaskOutput($dummyTask, 1);
        $this->assertEquals('Some Output!', $output['output']);
        $this->assertEquals(Task::SUCCESS, $output['statusCode']);

        // And run the post handler
        $this->shellWorker->run($dummyTask, true);
        $output = $this->taskStorage->readPostOutput($dummyTask, 1);
        $this->assertEquals('Post Output!', $output['output']);
        $this->assertEquals(Task::SUCCESS, $output['statusCode']);
    }

    /**
     * @depends testUseHandler
     */
    public function testFailingHandlers()
    {
        $mockHandler = $this->createMock(Handler::class);
        $mockHandler->expects($this->once())
            ->method('primaryHandler')
            ->with($this->callback(function($subject){return $subject instanceof Task;}))
            ->willReturn(false);
        $mockHandler->expects($this->once())
            ->method('postHandler')
            ->with($this->callback(function($subject){return $subject instanceof Task;}))
            ->willReturn(false);

        // Create a Dummy task
        $dummyTask = new Task('testFailingHandlers1', $mockHandler);
        $this->taskStorage->addTask($dummyTask);

        // Run the task in ShellWorker
        $this->shellWorker->run($dummyTask, false);

        // And verify if the Output is correctly set
        $output = $this->taskStorage->readTaskOutput($dummyTask, 1);
        $this->assertEquals('', $output['output']);
        $this->assertEquals(Task::FAILED, $output['statusCode']);

        // And run a post failure
        $this->shellWorker->run($dummyTask, true);
        $output = $this->taskStorage->readPostOutput($dummyTask, 1);
        $this->assertEquals('', $output['output']);
        $this->assertEquals(Task::FAILED, $output['statusCode']);
    }

    /**
     * @depends testUseHandler
     */
    public function testParentHandlers()
    {
        // First create the Handlers
        $parentHandler = $this->createMock(Handler::class);
        $childHandler = $this->createMock(Handler::class);

        // Prepare parent handler output
        $parentHandler->expects($this->once())
            ->method('primaryHandler')
            ->with($this->callback(function($subject){return $subject instanceof Task;}))
            ->willReturn(true);
        $parentHandler->expects($this->once())
            ->method('getOutput')
            ->willReturn('Parent Output');

        // Prepare the child handler
        $childHandler->expects($this->once())
            ->method('getParentHandler')
            ->willReturn($parentHandler);
        $childHandler->expects($this->once())
            ->method('setParentInput')
            ->with($this->equalTo('Parent Output'));
        $childHandler->expects($this->once())
            ->method('primaryHandler')
            ->with($this->callback(function($subject){return $subject instanceof Task;}))
            ->willReturn(true);
        $childHandler->expects($this->once())
            ->method('getOutput')
            ->willReturn('Child Output');

        // Set the relation
        $childHandler->setParentHandler($parentHandler);

        // Create the Dummy Task
        $dummyTask = new Task('testParentHandlers', $childHandler);
        $this->taskStorage->addTask($dummyTask);

        // Run the task in ShellWorker
        $this->shellWorker->run($dummyTask, false);

        // And verify if the Output is correctly set
        $output = $this->taskStorage->readTaskOutput($dummyTask, 1);
        $this->assertEquals('Child Output', $output['output']);
        $this->assertEquals(Task::SUCCESS, $output['statusCode']);
    }

    /**
     * @depends testParentHandlers
     */
    public function testCascadingParentFailure()
    {
        // First create the Handlers
        $parentHandler = $this->createMock(Handler::class);
        $childHandler = $this->createMock(Handler::class);

        // Set the relation
        $childHandler->setParentHandler($parentHandler);
        $childHandler->expects($this->once())
            ->method('getParentHandler')
            ->willReturn($parentHandler);

        // Set the results
        $parentHandler->expects($this->once())
            ->method('primaryHandler')
            ->willReturn(false);
        $childHandler->expects($this->never())
            ->method('primaryHandler')
            ->willReturn(true);

        // And some methods which shall be called in the end
        $childHandler->expects($this->once())
            ->method('getOutput')
            ->willReturn('Task failed successfully');

        // Create the task to run this
        $dummyTask = new Task('testCascadingParentFailure', $childHandler);
        $this->taskStorage->addTask($dummyTask);

        // Run the task in ShellWorker
        $this->shellWorker->run($dummyTask, false);

        // And verify whether the task has indeed failed
        $output = $this->taskStorage->readTaskOutput($dummyTask, 1);
        $this->assertEquals('Task failed successfully', $output['output']);
        $this->assertEquals(Task::FAILED, $output['statusCode']);
    }
}