<?php

namespace Imoje\Payment;

use Exception;
use JsonSchema\Validator;

/**
 * Class Validate
 *
 * @package Imoje\Payment
 */
class Validate
{

	/**
	 * @param string $data
	 *
	 * @return bool
	 * @throws Exception
	 */
	public static function notification($data)
	{

		$schema = [
			'type'       => 'object',
			'properties' => [

				'transaction' => [
					'type'       => 'object',
					'properties' => [

						'amount'   => [
							'type'             => 'integer',
							'minimum'          => 0,
							'exclusiveMinimum' => true,
						],
						'currency' => [
							'type' => 'string',
							'enum' => array_values(Util::getSupportedCurrencies()),
						],
						'status'   => [
							'type' => 'string',
							'enum' => array_values(Util::getTransactionStatuses()),
						],
						'orderId'  => [
							'type' => 'string',
						],

						'serviceId' => [
							'type' => 'string',
						],
						'type'      => [
							'type' => 'string',
							'enum' => [
								'sale',
								'refund',
							],
						],
					],
					'required'   => [
						'amount',
						'currency',
						'status',
						'orderId',
						'serviceId',
						'type',
					],
				],

			],
			'required'   => [
				'transaction',
			],

		];

		return self::validate($data, $schema, 'notification');
	}

	/**
	 * @param string $data
	 * @param array  $schema
	 * @param string $schemaType
	 *
	 * @return bool
	 * @throws Exception
	 */
	private static function validate($data, $schema, $schemaType)
	{

		$data = json_decode($data);

		$validator = new Validator();
		$validator->validate($data, json_decode(json_encode($schema)));

		if($validator->isValid()) {
			return true;
		}

		$errors = [
			'schema' => $schemaType,
		];

		foreach($validator->getErrors() as $error) {
			$errors[$error['property']] = $error['message'];
		}

		throw new Exception(json_encode($errors));
	}
}