/* eslint-disable linebreak-style */

import 'codeceptjs';
import { createWorker } from 'tesseract.js';
import { logger } from '../Logger/logger';
import { Wait } from './dewWait';
import { Screenshot } from './screenshot';
const fs = require(`fs`);

/**
 * Read Captcha Component
 */
export class ReadCaptcha {
  /**
   * The method is used to read the captcha and perform mathematical operation which is displayed in captcha and return the final output.
   *
   * ```js
   * await ReadCaptcha.readCaptcha(`//img[@id='captcha_image_register']`,"saveCaptchaScreenshot");
   * ```
   *
   * @param {string}locator
   * @param {string}filename
   */
  static async readCaptcha(locator: string, filename: string) {
    let returnNumber: number;
    try {
      await Wait.waitForDefaultTimeout(10);
      await Screenshot.saveElementScreenshot(locator, filename);
      // await Wait.waitForDefaultTimeout(5);
      const worker = await createWorker({
        logger: (m) => console.log(m),
      });

      await worker.load();
      await worker.loadLanguage(`eng`);
      await worker.initialize(`eng`);
      const { data: { text } } = await worker.recognize(filename + `.png`);
      console.log(`OCR read the image value as: ` + text);
      returnNumber = await this.performOperation(text);
      console.log(`Returning value after mathematical operation: ` + returnNumber);
      fs.unlinkSync(filename + `.png`);
      await worker.terminate();
      return returnNumber;
    } catch (err) {
      logger.log(`Issue while performing operation in DDCC: Error while reading captcha`);
      logger.log(err);
      throw err;
    }
  }

  /**
     * The method perform mathematical operation on output given by OCR.
     * @param {string}text
     */
  static async performOperation(text: string) {
    let numOperation: number;
    try {
      if (text.includes(`+`)) {
        const num1 = text.split(`+`)[0];
        const num2 = text.split(`+`)[1];
        numOperation = await Number(num1) + Number(num2);
      } else if (text.includes(`-`)) {
        const num1 = text.split(`-`)[0];
        const num2 = text.split(`-`)[1];
        numOperation = await Number(num1) - Number(num2);
      } else {
        throw Error(`Error in reading,OCR has recognized Alphabets or special characters`);
      }

      return numOperation;
    } catch (err) {
      logger.log(`Issue while performing operation in DDCC: Unable to perform mathematical operation`);
      throw err;
    }
  }
}