let annotationManager, adobeDCView

function listenForFileUpload() {
    var fileToRead = document.getElementById("file-picker");
    fileToRead.addEventListener("change", function (event) {
        var files = fileToRead.files;
        if (files.length > 0 && isValidPDF(files[0])) {
            var reader = new FileReader();
            reader.onloadend = function (e) {
                var filePromise = Promise.resolve(e.target.result);
                previewFileUsingFilePromise(filePromise).then(adobe => {
                    adobe.getAnnotationManager().then(async annotManager => {
                        annotationManager = annotManager
                        annotManager.setConfig({
                          downloadWithAnnotations: true,
                          printWithAnnotations: true
                        })
                        annotManager.addAnnotationsInPDF(annotations)
                        .then(() => annotationManager.registerEventListener(eventAnnotation => {
                            annotationEventListener(eventAnnotation)
                            }))
                      })
                })
            };
            reader.readAsArrayBuffer(files[0]);
        }
    }, false);
}

function previewFileUsingFilePromise (filePromise) {
    adobeDCView = new AdobeDC.View({
      clientId:  "<YOUR_CLIENT_ID>",
      divId: "adobe-dc-view"
    })

    const profile = {
      userProfile: {
        name: 'Administrador',
        id: 'administrador@looplex.com.br'
      }
    }

    adobeDCView.registerCallback(
      AdobeDC.View.Enum.CallbackType.GET_USER_PROFILE_API,
      function () {
        return new Promise(resolve => {
          resolve({
            code: window.AdobeDC.View.Enum.ApiResponseCode.SUCCESS,
            data: profile
          })
        })
      },
      {}
    )

    return adobeDCView.previewFile({
      content: {
        promise: filePromise
      },
      metaData: {
        fileName: 'Formulário de Referência 2020-páginas-375-452',
        id: '2075'
      }
    }, {
      dockPageControls: false,
      enableAnnotationAPIs: true,
      includePDFAnnotations: true,
      showLeftHandPanel: false
    })
  }

function isValidPDF(file) {
    if (file.type === "application/pdf") {
        return true;
    }
    if (file.type === "" && file.name) {
        var fileName = file.name;
        var lastDotIndex = fileName.lastIndexOf(".");
        return !(lastDotIndex === -1 || fileName.substr(lastDotIndex).toUpperCase() !== "PDF");
    }
    return false;
}



async function annotationEventListener (event) {
    const annotation = event.data
    console.log(event)
    if (event.type === 'ANNOTATION_ADDED') {
      if (annotation.bodyValue === '' && annotation.target.selector.subtype === 'shape') {
        const custom = Object.assign({}, annotation)
        const [x0, y0, xf, yf] = annotation.target.selector.boundingBox
        custom.target.selector.inkList = boundingBoxInkListRect([x0, y0], [xf, yf])
        annotationManager.updateAnnotation(annotation)
      }
    }
  }

  function boundingBoxInkListRect ([x0, y0], [xf, yf]) {
    return [[x0, y0, xf, y0], [xf, y0, xf, yf], [xf, yf, x0, yf], [x0, yf, x0, y0]]
  }