<?php

namespace UkrSolution\WpBarcodesGenerator\Makers;

use UkrSolution\WpBarcodesGenerator\Barcodes;
use UkrSolution\WpBarcodesGenerator\PostData;
use UkrSolution\WpBarcodesGenerator\ValidatorPostData;

/**
 * Class A4BarcodesMaker.
 *
 * Class for generating barcodes image files for items provided by getItems method, and sending result as array.
 */
abstract class A4BarcodesMaker
{
    protected $validationRules = array();
    protected $items = array();
    protected $barcodes = array();
    protected $success = array();
    protected $errors = array();
    protected $showName = true;
    protected $showText = true;
    protected $showText2 = true;
    protected $a4barcodes;

    /**
     * A4BarcodesMaker constructor.
     */
    public function __construct()
    {
        $this->a4bcBarcodes = new Barcodes();
    }

    /**
     * Template method for generating resulting array and send.
     */
    public function make()
    {
        ValidatorPostData::validate($this->validationRules, true);
        $this->getItems();
        $this->generateBarcodes();

        return $this->getResult();
    }

    /**
     * Array of items for which maker should generate barcodes.
     *
     * @return array
     */
    abstract protected function getItems();

    abstract protected function getFileOptions($itemData, $algorithm, $showCode);

    /**
     * Generate barcodes and form result.
     */
    protected function generateBarcodes()
    {
        $algorithm = isset(PostData::$postData['format']) ? PostData::$postData['format'] : null;
        $showCode = empty(PostData::$postData['hideCode']);

        // For each item generate barcode image
        foreach ($this->items as $itemData) {
            $fileOptions = $this->getFileOptions($itemData, $algorithm, $showCode);

            $validationResult = $this->a4bcBarcodes->validateBarcode($fileOptions['field_code'], $fileOptions['algorithm']);

            // if the barcode is correct
            if ($validationResult['is_valid']) {
                // create barcode image by settings
                $fileImage = $this->a4bcBarcodes->generateFile($fileOptions);

                // Prepare barcode data
                $barcodeData = array(
                    'image' => $fileImage,
                    'field_code' => $fileOptions['showCode'] ? $fileOptions['field_code'] : false,
                    'field_name' => $fileOptions['field_name'],
                    'field_text' => $fileOptions['field_text'],
                    'field_text_2' => $fileOptions['field_text_2'],
                    'format' => $fileOptions['algorithm'],
                );

                // Add to results. Take into account quantity parameter.
                for ($i = $fileOptions['quantity']; $i > 0; --$i) {
                    $this->barcodes[] = $barcodeData;
                }
            } else { // if the barcode is not correct
                $this->errors[] = array(
                    'id' => $itemData->ID,
                    'name' => $fileOptions['field_name'],
                    'code' => $validationResult['message'] ? $validationResult['message'] : $fileOptions['field_code'],
                    'text' => $fileOptions['field_text'],
                    'text2' => $fileOptions['field_text_2'],
                    'format' => $fileOptions['algorithm'],
                );
            }
        }
    }

    /**
     * Send result.
     */
    protected function getResult()
    {
        $result = array(
            'listItems' => $this->barcodes,
            'success' => $this->success,
            'error' => $this->errors,
        );

        return $result;
    }
}