<?php

	use Kahlan\Plugin\Stub;
	use Kahlan\Plugin\Monkey;

	use api\core\Request;
	use api\core\AuthSystem;
	use api\core\AuthSystemDefault;
	use error\core\Error;
	use error\core\Err;

	describe('api', function(){
		describe('core', function(){
			describe('Request', function(){


				beforeEach(function(){
					$_SERVER = [
						'REQUEST_METHOD' => 'POST'
					];
				});

				describe('[check] config file', function(){

					it('pass when config file exists', function(){

						expect( file_exists(Request::config_path()) )->toBeTruthy();

					});

					it('pass when we can read the config file', function(){

						expect( @file_get_contents(Request::config_path()) )->not->toBe(false);

					});

					it('pass when the config file is valid json', function(){

						$read = @file_get_contents(Request::config_path());
						expect($read)->not->toBe(false);
						expect( json_decode($read, true) )->not->toBeNull();
						expect( json_decode($read, true) )->toBeA('array');

					});

				});

				describe('__construct(@path, @params)', function(){

					it('fail if no HTTP_METHOD', function(){
						unset($_SERVER);

						$req = new Request('someString');
						expect($req->error->get())->toBe(Err::UnknownHttpMethod);
					});

					context('with argument combinations', function(){

						it('fail if @path is missing', function(){

							$req = new Request();

							expect($req->error->get())->toBe(Err::MissingPath);

						});

						it('fail if @path is not a string', function(){

							expect('is_string')->toBeCalled();
							$req = new Request(1);

							expect($req->error->get())->toBe(Err::WrongPathModule);

						});

						it('pass if @params is an array', function(){

							unset($_SERVER);
							expect('is_array')->toBeCalled();

							$req = new Request('someString', ['a', 'b']);

							expect($req->error->get())->toBe(Err::UnknownHttpMethod);

						});

						it('pass if @params is not an array (default: [])', function(){

							unset($_SERVER);

							expect('is_array')->toBeCalled();

							$types = [true, false, null, 1, 2.3, -1.2, 0, 'blabla'];

							foreach($types as $type){

								$req = new Request('someString', true);
								expect($req->error->get())->toBe(Err::UnknownHttpMethod);

							}

						});

					});

					context('with config errors', function(){

						it('fail if the config file doesn\'t exist', function(){

							// Request::config_path -> 'aa'
							allow(Request::class)->toReceive('::config_path')->andReturn('invalid_fname');
							expect(Request::config_path())->toBe('invalid_fname');

							// file_exists -> false
							allow('file_exists')->toBeCalled()->andReturn(false);
							expect('file_exists')->toBeCalled();

							$req = new Request('a/b');

							expect($req->error->get())->toBe(Err::UnreachableResource);

						});

						it('fail if the config file cannot be read', function(){

							// file_get_contents -> false
							allow('file_get_contents')->toBeCalled()->andReturn(false);
							expect('file_get_contents')->toBeCalled();

							$req = new Request('a/b');

							expect($req->error->get())->toBe(Err::UnreachableResource);

						});

						it('fail if the json format is not valid', function(){

							// file_exists -> true
							allow('file_exists')->toBeCalled()->andReturn(true);
							expect('file_exists')->toBeCalled();

							// file_get_contents -> false
							allow('file_get_contents')->toBeCalled()->andReturn('{incorrect_json');
							expect('file_get_contents')->toBeCalled();

							// json_decode -> called
							expect('json_decode')->toBeCalled();

							$req = new Request('a/b');

							expect($req->error->get())->toBe(Err::ParsingFailed);

						});

					});

					context('with checks errors', function(){

						it('fail with checkPath() fails', function(){

							allow(Request::class)->toReceive('checkPath')->andRun(function(){
								$this->error->set(Err::UnknownError);
								return false;
							});

							$req = new Request('a/b');

							expect($req->error->get())->toBe(Err::UnknownError);

						});

						it('fail with checkPermission() fails', function(){

							// bypass checkPath();
							allow(Request::class)->toReceive('checkPath')->andReturn(true);

							allow(Request::class)->toReceive('checkPermission')->andRun(function(){
								$this->error->set(Err::UnknownError);
								return false;
							});

							$req = new Request('a/b');

							expect($req->error->get())->toBe(Err::UnknownError);

						});

						it('fail with checkParams() fails', function(){

							// bypass checkPath(); + checkPermission();
							allow(Request::class)->toReceive('checkPath')->andReturn(true);
							allow(Request::class)->toReceive('checkPermission')->andReturn(true);

							allow(Request::class)->toReceive('checkParams')->andRun(function(){
								$this->error->set(Err::UnknownError);
								return false;
							});

							$req = new Request('a/b');

							expect($req->error->get())->toBe(Err::UnknownError);

						});

						it('pass with all checks ok', function(){

							// bypass all checks
							allow(Request::class)->toReceive('checkPath')->andReturn(true);
							allow(Request::class)->toReceive('checkPermission')->andReturn(true);
							allow(Request::class)->toReceive('checkParams')->andReturn(true);

							// bypass buildOptions();
							allow(Request::class)->toReceive('buildOptions')->andReturn(true);

							$req = new Request('a/b');

							expect($req->error->get())->toBe(Err::Success);

						});

					});

				});


				describe('checkPath(@path)', function(){

					it('fail when wrong path format: \'module/method\'', function(){

						$values = ['a-b', 'a /b', 'a/b '];

						foreach($values as $value){

							$req = new Request($value);
							expect($req->error->get())->toBe(Err::WrongPathModule);

						}

					});

					it('pass when valid path format: letter/number/-/_', function(){

						$values = ['a_b-c/d-e_f', 'abc/def', '_a_/_b_'];

						foreach($values as $value){

							$req = new Request($value);
							expect($req->error->get())->not->toBe(Err::WrongPathModule);

						}

					});

					it('fail when unknown module', function(){

						allow('json_decode')->toBeCalled()->andReturn([
							'mo-du_leA' => [],
							'moduleB' => []
						]);

						$values = ['modulea/method', 'MODULEA/method', 'moduleC/method'];

						foreach($values as $value){

							$req = new Request($value);
							expect($req->error->get())->toBe(Err::UnknownModule);

						}

					});

					it('fail when unknown method', function(){

						allow('json_decode')->toBeCalled()->andReturn([
							'mo-du_leA' => [ 'POST::me-th_odA' => [] ],
							'moduleB' => []
						]);

						$values = ['mo-du_leA/me-thodA', 'mo-du_leA/meth_odA', 'mo-du_leA/me-th_oda'];

						foreach($values as $value){

							$req = new Request($value);
							expect($req->error->get())->toBe(Err::UnknownMethod);

						}

					});

					it('pass all right', function(){

						// bypass all checks
						allow(Request::class)->toReceive('checkPermission')->andReturn(true);
						allow(Request::class)->toReceive('checkParams')->andReturn(true);

						// bypass buildOptions();
						allow(Request::class)->toReceive('buildOptions')->andReturn(true);

						allow('json_decode')->toBeCalled()->andReturn([
							'mo-du_leA' => [ 'POST::me-th_odA' => [] ],
							'moduleB' => []
						]);

						$req = new Request('mo-du_leA/me-th_odA');
						expect($req->error->get())->toBe(Err::Success);

					});

				});

				describe('checkPermission()', function(){

					it('pass when no permission', function(){

						// bypass checkers
						allow(Request::class)->toReceive('checkParams')->andReturn(true);
						allow(Request::class)->toReceive('buildOptions')->andReturn(true);

						allow('json_decode')->toBeCalled()->andReturn([
							'moduleA' => [
								'POST::methodA' => []
							]
						]);


						$req = new Request('moduleA/methodA');
						expect($req->error->get())->toBe(Err::Success);

					});

					it('pass when permission is not an array', function(){

						// bypass checkers
						allow(Request::class)->toReceive('checkParams')->andReturn(true);
						allow(Request::class)->toReceive('buildOptions')->andReturn(true);

						allow('json_decode')->toBeCalled()->andReturn([
							'moduleA' => [
								'POST::methodA' => [
									'permissions' => 23.2
								]
							]
						]);


						$req = new Request('moduleA/methodA');
						expect($req->error->get())->toBe(Err::Success);

					});

					it('pass when permission is an empty array', function(){

						// bypass checkers
						allow(Request::class)->toReceive('checkParams')->andReturn(true);
						allow(Request::class)->toReceive('buildOptions')->andReturn(true);

						allow('json_decode')->toBeCalled()->andReturn([
							'moduleA' => [
								'POST::methodA' => [
									'permissions' => []
								]
							]
						]);


						$req = new Request('moduleA/methodA');
						expect($req->error->get())->toBe(Err::Success);

					});

					it('fail if neither AuthSystem nor AuthSystemDefault', function(){

						// bypass checkers
						allow(Request::class)->toReceive('checkParams')->andReturn(true);
						allow(Request::class)->toReceive('buildOptions')->andReturn(true);

						allow('file_exists')->toBeCalled()->andReturn(true, false);
						expect('file_exists')->toBeCalled()->times(2);

						allow('json_decode')->toBeCalled()->andReturn([
							'moduleA' => [
								'POST::methodA' => [
									'permissions' => ['a']
								]
							]
						]);

						$req = new Request('moduleA/methodA');
						expect($req->error->get())->toBe(Err::UnreachableResource);

					});

					it('pass if no AuthSystem but AuthSystemDefault (Success)', function(){

						// bypass checkers
						allow(Request::class)->toReceive('checkParams')->andReturn(true);
						allow(Request::class)->toReceive('buildOptions')->andReturn(true);

						allow('json_decode')->toBeCalled()->andReturn([
							'moduleA' => [
								'POST::methodA' => [
									'permissions' => ['a']
								]
							]
						]);

						allow(AuthSystemDefault::class)->toReceive('::permission')->andReturn(new Error(Err::Success));
						$req = new Request('moduleA/methodA');
						expect($req->error->get())->toBe(Err::Success);

					});

					it('pass if no AuthSystem but AuthSystemDefault (PermissionError)', function(){

						// bypass checkers
						allow(Request::class)->toReceive('checkParams')->andReturn(true);
						allow(Request::class)->toReceive('buildOptions')->andReturn(true);

						allow('json_decode')->toBeCalled()->andReturn([
							'moduleA' => [
								'POST::methodA' => [
									'permissions' => ['a']
								]
							]
						]);

						allow(AuthSystemDefault::class)->toReceive('::permission')->andReturn(new Error(Err::PermissionError));
						$req = new Request('moduleA/methodA');
						expect($req->error->get())->toBe(Err::PermissionError);

					});

				});

				describe('setAuthSystem(@instance)', function(){

					it('pass when instance of AuthSystem', function(){

						$instance = new AuthSystemDefault();

						expect($instance)->toBeAnInstanceOf('api\core\AuthSystem');
						expect(Request::setAuthSystem($instance))->toBeTruthy();

					});

					it('fail when not instance of AuthSystem', function(){

						$instance = new Error(Err::Success);

						expect($instance)->not->toBeAnInstanceOf('api\core\AuthSystem');
						expect(Request::setAuthSystem($instance))->toBeFalsy();

					});

				});

			});
		});
	});