<?php
namespace Bsr\Utils\Configuration;

use PHPUnit\Framework\TestCase;

class ConfigurationTest extends TestCase
{
    protected $testConfig = array(
        'session' => 'override',
        'a' => array(
            'b' => array(
                'c' => 'C', 
                'c2' => 'D'
            )
        ),
    );

    protected $defaultConfig;
    protected $dummyConfigFilePath1;
    protected $dummyConfigFilePath2;

    public function setUp()
    {
        $this->defaultConfig = array('session' => array('save_path' => session_save_path()));
        $this->dummyConfigFilePath1 = realpath(dirname(__FILE__) . '/../../../config/configuration.local.php');
        $this->dummyConfigFilePath2 = realpath(dirname(__FILE__) . '/../../../config/configuration.logger.quiet.php');
    }

    public function testConfigurationInstanceIsTheSame()
    {
        $this->assertSame(Configuration::getInstance(), Configuration::getInstance());
    }

    public function testInitialDefaultConfigContainsOnlyDefaultSessionSavePath()
    {
        $this->assertSame(Configuration::getInstance()->getConfig(), $this->defaultConfig);
    }

    public function testConfigChangesAfterSettingCustomConfig()
    {
        $preConfig = Configuration::getInstance()->getConfig();
        Configuration::getInstance()->setCustomConfig($this->testConfig);
        $postConfig = Configuration::getInstance()->getConfig();
        $this->assertNotSame($preConfig, $postConfig);
    }

    public function testCustomConfigGetsMergedProperly()
    {
        Configuration::getInstance()->setCustomConfig($this->testConfig);
        $this->assertSame(Configuration::getInstance()->getConfig(), $this->testConfig);
    }

    public function testReturnsFalseIfHasKeyButNotMostNestedKey()
    {
        Configuration::getInstance()->setCustomConfig($this->defaultConfig);
        Configuration::getInstance()->setCustomConfig($this->testConfig);
        $this->assertEquals(Configuration::has(array('session', 'save_path')), false);
    }

    public function testReturnsFalseIfHasNotInitialKeyButHasNestedKey()
    {
        Configuration::getInstance()->setCustomConfig($this->defaultConfig);
        $this->assertEquals(Configuration::has(array('z', 'save_path')), false);
    }

    public function testReturnsFalseIfHasNoneOfKeyPath()
    {
        Configuration::getInstance()->setCustomConfig($this->defaultConfig);
        $this->assertEquals(Configuration::has(array('z', 'w')), false);
    }

    public function testReturnsTrueIfHasKeyPath()
    {
        Configuration::getInstance()->setCustomConfig($this->defaultConfig);
        $this->assertEquals(Configuration::has(array('session', 'save_path')), true);
    }

    public function testCanGetNestedKeyValueFromKeysList()
    {
        Configuration::getInstance()->setCustomConfig($this->defaultConfig);
        $this->assertSame(
            Configuration::get(array('session', 'save_path')),
            $this->defaultConfig['session']['save_path']
        );
    }

    public function testReturnsDefaultParamIfKeyNotSet()
    {
        Configuration::getInstance()->setCustomConfig($this->defaultConfig);
        $default = "some_random_thing";
        $this->assertSame(
            Configuration::get(array('x', 'y'), $default),
            $default
        );
    }

    public function testKeysInDotNotationGetConvertedToKeysArray()
    {
        $this->assertSame(
            Configuration::parseKeys('a.b.c'), 
            array('a', 'b', 'c')
        );
    }

    public function testKeysInDotNotationGetsSameResult()
    {
        Configuration::getInstance()->setCustomConfig($this->defaultConfig);
        Configuration::getInstance()->setCustomConfig($this->testConfig);
        $this->assertSame(
            Configuration::get('a.b.c'), 
            Configuration::get(array('a', 'b', 'c'))
        );
    }

    public function testGetWithoutParamReturnsFullConfigArray()
    {
        Configuration::getInstance()->setCustomConfig($this->testConfig);
        $this->assertSame(Configuration::get(), $this->testConfig);
    }

    public function testDummyConfigFileExists()
    {
        $this->assertEquals(file_exists($this->dummyConfigFilePath1), true);
    }

    public function testFileCustomConfigGetsLoadedIfFileExists()
    {
        $configPriorToFileLoading = Configuration::get();
        Configuration::setConfigFilePath($this->dummyConfigFilePath1);
        $this->assertSame(Configuration::get(), array_replace_recursive($this->testConfig, include $this->dummyConfigFilePath1));
    }

    public function testSetConfigFilePathWithSecondParamTrueClearsPreviousConfig()
    {
        $configPriorToFileLoading = Configuration::get();
        Configuration::setConfigFilePath($this->dummyConfigFilePath2, true);
        $this->assertSame(Configuration::get(), include $this->dummyConfigFilePath2);
    }
}