<?php
/**
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @since         3.0.0
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 */
namespace Cake\Test\TestCase\Core;

use Cake\Core\InstanceConfigTrait;
use Cake\TestSuite\TestCase;

/**
 * TestInstanceConfig
 */
class TestInstanceConfig {

	use InstanceConfigTrait;

/**
 * _defaultConfig
 *
 * Some default config
 *
 * @var array
 */
	protected $_defaultConfig = [
		'some' => 'string',
		'a' => ['nested' => 'value']
	];
}

/**
 * ReadOnlyTestInstanceConfig
 */
class ReadOnlyTestInstanceConfig {

	use InstanceConfigTrait;

/**
 * _defaultConfig
 *
 * Some default config
 *
 * @var array
 */
	protected $_defaultConfig = [
		'some' => 'string',
		'a' => ['nested' => 'value']
	];

/**
 * Example of how to prevent modifying config at run time
 *
 * @throws \Exception
 * @param mixed $key
 * @param mixed $value
 * @return void
 */
	protected function _configWrite($key, $value = null) {
		throw new \Exception('This Instance is readonly');
	}

}

/**
 * InstanceConfigTraitTest
 *
 */
class InstanceConfigTraitTest extends TestCase {

/**
 * setUp method
 *
 * @return void
 */
	public function setUp() {
		parent::setUp();
		$this->object = new TestInstanceConfig();
	}

/**
 * testDefaultsAreSet
 *
 * @return void
 */
	public function testDefaultsAreSet() {
		$this->assertSame(
			[
				'some' => 'string',
				'a' => ['nested' => 'value']
			],
			$this->object->config(),
			'runtime config should match the defaults if not overriden'
		);
	}

/**
 * testGetSimple
 *
 * @return void
 */
	public function testGetSimple() {
		$this->assertSame(
			'string',
			$this->object->config('some'),
			'should return the key value only'
		);

		$this->assertSame(
			['nested' => 'value'],
			$this->object->config('a'),
			'should return the key value only'
		);
	}

/**
 * testGetDot
 *
 * @return void
 */
	public function testGetDot() {
		$this->assertSame(
			'value',
			$this->object->config('a.nested'),
			'should return the nested value only'
		);
	}

/**
 * testSetSimple
 *
 * @return void
 */
	public function testSetSimple() {
		$this->object->config('foo', 'bar');
		$this->assertSame(
			'bar',
			$this->object->config('foo'),
			'should return the same value just set'
		);

		$return = $this->object->config('some', 'zum');
		$this->assertSame(
			'zum',
			$this->object->config('some'),
			'should return the overritten value'
		);
		$this->assertSame(
			$this->object,
			$return,
			'write operations should return the instance'
		);

		$this->assertSame(
			[
				'some' => 'zum',
				'a' => ['nested' => 'value'],
				'foo' => 'bar',
			],
			$this->object->config(),
			'updates should be merged with existing config'
		);
	}

/**
 * testSetNested
 *
 * @return void
 */
	public function testSetNested() {
		$this->object->config('new.foo', 'bar');
		$this->assertSame(
			'bar',
			$this->object->config('new.foo'),
			'should return the same value just set'
		);

		$this->object->config('a.nested', 'zum');
		$this->assertSame(
			'zum',
			$this->object->config('a.nested'),
			'should return the overritten value'
		);

		$this->assertSame(
			[
				'some' => 'string',
				'a' => ['nested' => 'zum'],
				'new' => ['foo' => 'bar']
			],
			$this->object->config(),
			'updates should be merged with existing config'
		);
	}

/**
 * testSetNested
 *
 * @return void
 */
	public function testSetArray() {
		$this->object->config(['foo' => 'bar']);
		$this->assertSame(
			'bar',
			$this->object->config('foo'),
			'should return the same value just set'
		);

		$this->assertSame(
			[
				'some' => 'string',
				'a' => ['nested' => 'value'],
				'foo' => 'bar',
			],
			$this->object->config(),
			'updates should be merged with existing config'
		);

		$this->object->config(['new.foo' => 'bar']);
		$this->assertSame(
			'bar',
			$this->object->config('new.foo'),
			'should return the same value just set'
		);

		$this->assertSame(
			[
				'some' => 'string',
				'a' => ['nested' => 'value'],
				'foo' => 'bar',
				'new' => ['foo' => 'bar']
			],
			$this->object->config(),
			'updates should be merged with existing config'
		);

		$this->object->config(['multiple' => 'different', 'a.values.to' => 'set']);

		$this->assertSame(
			[
				'some' => 'string',
				'a' => ['nested' => 'value', 'values' => ['to' => 'set']],
				'foo' => 'bar',
				'new' => ['foo' => 'bar'],
				'multiple' => 'different'
			],
			$this->object->config(),
			'updates should be merged with existing config'
		);
	}

/**
 * testSetClobber
 *
 * @expectedException \Exception
 * @expectedExceptionMessage Cannot set a.nested.value
 * @return void
 */
	public function testSetClobber() {
		$this->object->config(['a.nested.value' => 'not possible'], null, false);
		$result = $this->object->config();
	}

/**
 * testMerge
 *
 * @return void
 */
	public function testMerge() {
		$this->object->config(['a' => ['nother' => 'value']]);

		$this->assertSame(
			[
				'some' => 'string',
				'a' => [
					'nested' => 'value',
					'nother' => 'value'
				]
			],
			$this->object->config(),
			'Merging should not delete untouched array values'
		);
	}

/**
 * testMergeDotKey
 *
 * @return void
 */
	public function testMergeDotKey() {
		$this->object->config('a.nother', 'value');

		$this->assertSame(
			[
				'some' => 'string',
				'a' => [
					'nested' => 'value',
					'nother' => 'value'
				]
			],
			$this->object->config(),
			'Should act the same as having passed the equivalent array to the config function'
		);

		$this->object->config(['a.nextra' => 'value']);

		$this->assertSame(
			[
				'some' => 'string',
				'a' => [
					'nested' => 'value',
					'nother' => 'value',
					'nextra' => 'value'
				]
			],
			$this->object->config(),
			'Merging should not delete untouched array values'
		);
	}

/**
 * testSetDefaultsMerge
 *
 * @return void
 */
	public function testSetDefaultsMerge() {
		$this->object->config(['a' => ['nother' => 'value']]);

		$this->assertSame(
			[
				'some' => 'string',
				'a' => [
					'nested' => 'value',
					'nother' => 'value'
				]
			],
			$this->object->config(),
			'First access should act like any subsequent access'
		);
	}

/**
 * testSetDefaultsNoMerge
 *
 * @return void
 */
	public function testSetDefaultsNoMerge() {
		$this->object->config(['a' => ['nother' => 'value']], null, false);

		$this->assertSame(
			[
				'some' => 'string',
				'a' => [
					'nother' => 'value'
				]
			],
			$this->object->config(),
			'If explicitly no-merge, array values should be overwritten'
		);
	}

/**
 * testSetMergeNoClobber
 *
 * Merging offers no such protection of clobbering a value whilst implemented
 * using the Hash class
 *
 * @return void
 */
	public function testSetMergeNoClobber() {
		$this->object->config(['a.nested.value' => 'it is possible']);

		$this->assertSame(
			[
				'some' => 'string',
				'a' => [
					'nested' => [
						'value' => 'it is possible'
					]
				]
			],
			$this->object->config(),
			'When merging a scalar property will be overwritten with an array'
		);
	}

/**
 * testReadOnlyConfig
 *
 * @expectedException \Exception
 * @expectedExceptionMessage This Instance is readonly
 * @return void
 */
	public function testReadOnlyConfig() {
		$object = new ReadOnlyTestInstanceConfig();

		$this->assertSame(
			[
				'some' => 'string',
				'a' => ['nested' => 'value']
			],
			$object->config(),
			'default config should be returned'
		);

		$object->config('throw.me', 'an exception');
	}

/**
 * testDeleteSimple
 *
 * @return void
 */
	public function testDeleteSimple() {
		$this->object->config('foo', null);
		$this->assertNull(
			$this->object->config('foo'),
			'setting a new key to null should have no effect'
		);

		$this->object->config('some', null);
		$this->assertNull(
			$this->object->config('some'),
			'should delete the existing value'
		);

		$this->assertSame(
			[
				'a' => ['nested' => 'value'],
			],
			$this->object->config(),
			'deleted keys should not be present'
		);
	}

/**
 * testDeleteNested
 *
 * @return void
 */
	public function testDeleteNested() {
		$this->object->config('new.foo', null);
		$this->assertNull(
			$this->object->config('new.foo'),
			'setting a new key to null should have no effect'
		);

		$this->object->config('a.nested', null);
		$this->assertNull(
			$this->object->config('a.nested'),
			'should delete the existing value'
		);

		$this->assertSame(
			[
				'some' => 'string',
			],
			$this->object->config(),
			'deleted keys should not be present'
		);
	}

/**
 * testDeleteClobber
 *
 * @expectedException \Exception
 * @expectedExceptionMessage Cannot unset a.nested.value.whoops
 * @return void
 */
	public function testDeleteClobber() {
		$this->object->config('a.nested.value.whoops', null);
	}

}