<?php

function __( $message ) {
	return $message;
}

function esc_url( $url ) {
	return $url;
}

class RequirementsCheckerTest extends PHPUnit_Framework_TestCase {

	public function testItReceivesAUsableRequirementObject() {
		$checker = new Whip_RequirementsChecker();
		$checker->addRequirement( new Whip_VersionRequirement( 'php', '5.2' ) );

		$this->assertTrue( $checker->hasRequirements() );
		$this->assertEquals( 1, $checker->totalRequirements() );
	}

	/**
	 * @requires PHP 7
	 */
	public function testItThrowsAnTypeErrorWhenInvalidRequirementIsPassed() {
		if ( version_compare( phpversion(), 7.0, '<' ) ) {
			$this->markTestSkipped( 'Skipped due to incompatible PHP version.' );
		}

		$exceptionCaught = false;

		$checker = new Whip_RequirementsChecker();

		try {
			$checker->addRequirement( new stdClass() );
		} catch( Error $e ) {
			$exceptionCaught = true;
		}

		$this->assertTrue( $exceptionCaught );
	}

	public function testItThrowsAnTypeErrorWhenInvalidRequirementIsPassedInPHP5() {
		if ( version_compare( phpversion(), 7.0, '>=' ) ) {
			$this->markTestSkipped();
		}

		$exceptionCaught = false;

		$checker = new Whip_RequirementsChecker();

		try {
			$checker->addRequirement( new stdClass() );
		} catch( Exception $e ) {
			$exceptionCaught = true;
		}

		$this->assertTrue( $exceptionCaught );
	}

	public function testItOnlyContainsUniqueComponents() {
		$checker = new Whip_RequirementsChecker();

		$checker->addRequirement( new Whip_VersionRequirement( 'php', '5.2' ) );
		$checker->addRequirement( new Whip_VersionRequirement( 'mysql', '5.6' ) );

		$this->assertTrue( $checker->hasRequirements() );
		$this->assertEquals( 2, $checker->totalRequirements() );

		$checker->addRequirement( new Whip_VersionRequirement( 'php', '6' ) );

		$this->assertEquals( 2, $checker->totalRequirements() );
	}

	public function testIfRequirementExists() {
		$checker = new Whip_RequirementsChecker();

		$checker->addRequirement( new Whip_VersionRequirement( 'php', '5.2' ) );
		$checker->addRequirement( new Whip_VersionRequirement( 'mysql', '5.6' ) );

		$this->assertTrue( $checker->requirementExistsForComponent( 'php' ) );
		$this->assertFalse( $checker->requirementExistsForComponent( 'mongodb' ) );
	}

	public function testCheckIfRequirementIsFulfilled() {
		$checker = new Whip_RequirementsChecker( array( 'php' => phpversion() )	);

		$checker->addRequirement( new Whip_VersionRequirement( 'php', '5.2' ) );
		$checker->check();

		$this->assertEmpty( $checker->getMostRecentMessage()->body() );
	}

	public function testCheckIfPHPRequirementIsNotFulfilled() {
		$checker = new Whip_RequirementsChecker( array( 'php' => 4 )	);

		$checker->addRequirement( new Whip_VersionRequirement( 'php', '5.6' ) );
		$checker->check();

		$this->assertTrue( $checker->hasMessages() );

		// Get the message. This will unset the global.
		$recentMessage = $checker->getMostRecentMessage();

		$this->assertNotEmpty( $recentMessage  );
		$this->assertInternalType( 'string', $recentMessage->body() );
		$this->assertFalse( $checker->hasMessages() );
		$this->assertInstanceOf( 'Whip_UpgradePhpMessage', $recentMessage );
	}

	public function testCheckIfRequirementIsNotFulfilled() {
		$checker = new Whip_RequirementsChecker( array( 'mysql' => 4 )	);

		$checker->addRequirement( new Whip_VersionRequirement( 'mysql', '5.6' ) );
		$checker->check();

		$this->assertTrue( $checker->hasMessages() );

		// Get the message. This will unset the global.
		$recentMessage = $checker->getMostRecentMessage();

		$this->assertNotEmpty( $recentMessage  );
		$this->assertFalse( $checker->hasMessages() );
		$this->assertInstanceOf( 'Whip_InvalidVersionRequirementMessage', $recentMessage );
		$this->assertStringStartsWith( 'Invalid version detected', $recentMessage->body() );
	}

	public function testCheckIfRequirementIsFulfilledWithSpecificComparison() {
		$checker = new Whip_RequirementsChecker( array( 'php' => 4 )	);

		$checker->addRequirement( new Whip_VersionRequirement( 'php', '5.2', '<' ) );
		$checker->check();

		$this->assertFalse( $checker->hasMessages() );
	}

	public function testCheckIfRequirementIsNotFulfilledWithSpecificComparison() {
		$checker = new Whip_RequirementsChecker( array( 'php' => 4 ) );

		$checker->addRequirement( new Whip_VersionRequirement( 'php', '5.2', '>=' ) );
		$checker->check();

		$this->assertTrue( $checker->hasMessages() );
	}
}