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<?php

/**
 * Copyright 2017 MICRORISC s.r.o.
 * Copyright 2017 IQRF Tech s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

declare(strict_types=1);

namespace App\ConfigModule\Model;

use App\Model\CommandManager;
use App\Model\JsonFileManager;
use Nette;
use Nette\Utils\ArrayHash;

class IqrfManager {

    use Nette\SmartObject;

    /**
     * @var CommandManager
     */
    private $commandManager;

    /**
     * @var JsonFileManager
     */
    private $fileManager;

    /**
     * @var string File name (without .json)
     */
    private $fileName = 'IqrfInterface';

    /**
     * Constructor
     * @param CommandManager $commandManager
     * @param JsonFileManager $fileManager
     */
    public function __construct(CommandManager $commandManager, JsonFileManager $fileManager) {
        $this->commandManager = $commandManager;
        $this->fileManager = $fileManager;
    }

    /**
     * Load configuration
     * @return array Array for form
     */
    public function load() {
        return $this->fileManager->read($this->fileName);
    }

    /**
     * Save configuration
     * @param ArrayHash $array Settings
     */
    public function save(ArrayHash $array) {
        $this->fileManager->write($this->fileName, $array);
    }

    /**
     * Create list of SPI and USB CDC interfaces available in the system
     * @return array SPI and USB CDC interfaces available in the system
     */
    public function getInterfaces() {
        $interfaces = [];
        $interfaces['cdc'] = $this->getCdcInterfaces();
        $interfaces['spi'] = $this->getSpiInterfaces();
        return $interfaces;
    }

    /**
     * Create list of USB CDC interfaces available in the system
     * @return array USB CDC interfaces available in the system
     */
    public function getCdcInterfaces() {
        $cdc = [];
        $ls = $this->commandManager->send("ls /dev/ttyACM* | awk '{ print $0 }'", true);
        foreach (explode(PHP_EOL, $ls) as $path) {
            if (!empty($path)) {
                array_push($cdc, $path);
            }
        }
        if (!empty($cdc)) {
            return $cdc;
        }
    }

    /**
     * Create list of SPI interfaces available in the system
     * @return array SPI interfaces available in the system
     */
    public function getSpiInterfaces() {
        $spi = [];
        $ls = $this->commandManager->send("ls /dev/spidev* | awk '{ print $0 }'", true);
        foreach (explode(PHP_EOL, $ls) as $path) {
            if (!empty($path)) {
                array_push($spi, $path);
            }
        }
        if (!empty($spi)) {
            return $spi;
        }
    }

}