import axios from "axios";
import isBase64 from "is-base64";
import FileSaver from "file-saver";
import { Base64 } from "js-base64";

// import {getDocument, GlobalWorkerOptions} from 'pdfjs-dist';
//
// (async () => {
//     GlobalWorkerOptions.workerSrc = await import(
//         // @ts-ignore
//         "pdfjs-dist/build/pdf.worker.entry"
//         );
// })();

export class EasyInvoice {
  private _elementId: string;
  private _renderedPdf: any;
  private _totalPages: number;
  private _pdf: string;

  constructor(
    pdf: string,
    totalPages: number,
    renderedPdf: any,
    elementId: string,
  ) {
    this._pdf = pdf;
    this._totalPages = totalPages;
    this._renderedPdf = renderedPdf;
    this._elementId = elementId;
  }

  createInvoice(options: any, cb: any = () => {}) {
    return new Promise((resolve, reject) => {
      const url = "https://api.easyinvoice.cloud/v2/free/invoices";

      const data = {
        data: options,
      };

      const config: any = {
        headers: {
          "easyinvoice-source": "npm",
        },
      };

      // Check if 'apiKey' exists in options and is not empty, then add the authorization header
      if (options.apiKey && options.apiKey.trim() !== "") {
        config.headers["Authorization"] = `Bearer ${options.apiKey}`;
      }

      axios
        .create()
        .post(url, data, config)
        .then((response) => {
          /* istanbul ignore next */
          const result = response.data.data;
          /* istanbul ignore next */
          this._pdf = result.pdf;
          /* istanbul ignore next */
          resolve(result);
          /* istanbul ignore next */
          cb(result);
        })
        .catch((error) => {
          /* istanbul ignore next */
          reject(error.response.data);
          /* istanbul ignore next */
          cb(error.response.data);
        });
    });
  }

  /* istanbul ignore next */
  download(filename = "invoice.pdf", pdf = this._pdf) {
    if (filename === undefined || isBase64(filename)) {
      throw new Error("Invalid filename.");
    }

    if (typeof window === "undefined") {
      throw new Error(
        "Easy Invoice download() is only supported in the browser.",
      );
    } else {
      downloadFile(filename, "application/pdf", pdf);
    }
  }

  /* istanbul ignore next */
  render(elementId: string, pdf = this._pdf, cb: any = () => {}) {
    return new Promise((resolve) => {
      if (typeof window === "undefined") {
        throw new Error(
          "Easy Invoice render() is only supported in the browser.",
        );
      } else {
        this._elementId = elementId;
        this.renderPdf(pdf, function (renderFinished: any) {
          resolve(renderFinished);
          cb(renderFinished);
        });
      }
    });
  }

  /* istanbul ignore next */
  renderPdf(pdfBase64: string, renderFinished: any) {
    // @ts-ignore
    const loadingTask = pdfjsLib.getDocument({ data: Base64.atob(pdfBase64) });
    loadingTask.promise.then(
      (pdf: any) => {
        // console.log('PDF loaded');
        this._totalPages = pdf.numPages;
        this._renderedPdf = pdf;
        this.renderPage(1, renderFinished);
      },
      function (reason: string) {
        // PDF loading error
        console.error(reason);
      },
    );
  }

  /* istanbul ignore next */
  renderPage(pageNumber: number, renderFinished: any) {
    this._renderedPdf.getPage(pageNumber).then((page: any) => {
      // console.log('Page loaded');
      const canvas = document.createElement("canvas");

      const viewport = isMobileBrowser()
        ? page.getViewport({
            scale: window.screen.width / page.getViewport({ scale: 1.0 }).width,
          })
        : page.getViewport({
            scale: Math.max(window.devicePixelRatio || 1, 1),
          });

      // @ts-ignore
      document.getElementById(this._elementId).innerHTML = "";
      const canvasWrapper = document.getElementById(this._elementId);
      // @ts-ignore
      canvasWrapper.appendChild(canvas);

      // Prepare canvas using PDF page dimensions
      const context = canvas.getContext("2d");
      canvas.height = viewport.height;
      canvas.width = viewport.width;

      // Render PDF page into canvas context
      const renderContext = {
        canvasContext: context,
        viewport: viewport,
      };
      const renderTask = page.render(renderContext);
      renderTask.promise.then(function () {
        // console.log('Page rendered');
        renderFinished(true);
      });
    });
  }
}

/* istanbul ignore next */
function downloadFile(fileName: string, contentType: string, base64: string) {
  const blob = base64toBlob(base64, contentType);
  FileSaver.saveAs(blob, fileName);
}

/* istanbul ignore next */
function base64toBlob(base64Data: string, contentType: string) {
  contentType = contentType || "";
  const sliceSize = 1024;
  const byteCharacters = Base64.atob(base64Data);
  // var byteCharacters = decodeURIComponent(escape(Base64.atob(base64Data)))
  const bytesLength = byteCharacters.length;
  const slicesCount = Math.ceil(bytesLength / sliceSize);
  const byteArrays = new Array(slicesCount);

  for (let sliceIndex = 0; sliceIndex < slicesCount; ++sliceIndex) {
    const begin = sliceIndex * sliceSize;
    const end = Math.min(begin + sliceSize, bytesLength);

    const bytes = new Array(end - begin);
    for (let offset = begin, i = 0; offset < end; ++i, ++offset) {
      bytes[i] = byteCharacters[offset].charCodeAt(0);
    }
    byteArrays[sliceIndex] = new Uint8Array(bytes);
  }
  return new Blob(byteArrays, {
    type: contentType,
  });
}

/* eslint-disable */

/* istanbul ignore next */
function isMobileBrowser() {
  var ua = navigator.userAgent;
  if (
    /(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(
      ua,
    ) ||
    /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(
      ua.substr(0, 4),
    )
  ) {
    return true;
  } else {
    return false;
  }
}

/* eslint-enable */

// @ts-ignore
export default new EasyInvoice();

if (typeof window === "undefined") {
  // @ts-ignore
  module.exports = new EasyInvoice();
}

// @ts-ignore
globalThis.easyinvoice = new EasyInvoice();