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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\IqrfAppModule\Model;

use Nette;

/**
 * Tool for parsing IQRF IDE macros.
 */
class IqrfMacroManager {

    use Nette\SmartObject;

    /**
     * @var string Path to IQRF IDE Macro file
     */
    private $path;

    /**
     * Constructor
     * @param string $path Path to IQRF IDE MAcro file
     */
    public function __construct(string $path) {
        $this->path = $path;
    }

    /**
     * Read .ini file and parse macros from IQRF IDE
     * @return array
     */
    public function read() {
        $config = parse_ini_file($this->path, true)['Macro'];
        $array = $this->parseMacros($config['Macros']);
        return $array;
    }

    /**
     * Parse data from HEX to array
     * @param string $hex Data in HEX
     * @return array Data in array
     */
    public function parseMacros(string $hex) {
        $array = explode("\r\n", trim($this->hex2ascii($hex)));
        for ($i = 0; $i < 3; $i++) {
            array_shift($array);
        }
        $macros = [];
        foreach ($array as $key => $value) {
            $category = $key % 63;
            $categoryId = floor($key / 63);
            $macro = (($key - ($categoryId * 63)) - 2) % 5;
            $macroId = floor(($key - 3 - ($categoryId * 63)) / 5);
            if ($category === 0) {
                $macros[$categoryId]['Name'] = $value;
            } elseif ($category === 1) {
                $macros[$categoryId]['Enabled'] = $value === 'True';
            } elseif ($macro === 1) {
                $macros[$categoryId]['Macros'][$macroId]['Name'] = $value;
            } elseif ($macro === 2) {
                $macros[$categoryId]['Macros'][$macroId]['Packet'] = trim($value, '.');
            } elseif ($macro === 3) {
                $macros[$categoryId]['Macros'][$macroId]['Enabled'] = $value === 'True';
            }
        }
        return $macros;
    }

    /**
     * Convert data from HEX to ASCII
     * @param string $hex Data in HEX
     * @return string Data in ASCII
     */
    public function hex2ascii(string $hex) {
        $string = '';
        for ($i = 0; $i < strlen($hex); $i += 2) {
            $string .= chr(hexdec(substr($hex, $i, 2)));
        }
        return $string;
    }

}