import { Buffer } from 'buffer';
import angular from 'angular';
import _ from 'lodash-es';
import chardet from 'chardet';
import { Base64 } from 'js-base64';
import KubernetesFormValidationHelper from 'Kubernetes/helpers/formValidationHelper';
import KubernetesConfigurationHelper from 'Kubernetes/helpers/configurationHelper';
import { KubernetesConfigurationFormValuesEntry } from 'Kubernetes/models/configuration/formvalues';

class KubernetesConfigurationDataController {
  /* @ngInject */
  constructor($async) {
    this.$async = $async;

    this.editorUpdate = this.editorUpdate.bind(this);
    this.editorUpdateAsync = this.editorUpdateAsync.bind(this);
    this.onFileLoad = this.onFileLoad.bind(this);
    this.onFileLoadAsync = this.onFileLoadAsync.bind(this);
    this.showSimpleMode = this.showSimpleMode.bind(this);
    this.showAdvancedMode = this.showAdvancedMode.bind(this);
  }

  onChangeKey(entry) {
    if (entry && entry.Used) {
      return;
    }

    this.state.duplicateKeys = KubernetesFormValidationHelper.getDuplicates(_.map(this.formValues.Data, (data) => data.Key));
    this.state.invalidKeys = KubernetesFormValidationHelper.getInvalidKeys(_.map(this.formValues.Data, (data) => data.Key));
    this.isValid = Object.keys(this.state.duplicateKeys).length === 0 && Object.keys(this.state.invalidKeys).length === 0;
  }

  addEntry() {
    this.formValues.Data.push(new KubernetesConfigurationFormValuesEntry());
  }

  removeEntry(index, entry) {
    if (entry.Used) {
      return;
    }

    this.formValues.Data.splice(index, 1);
    this.onChangeKey();
  }

  async editorUpdateAsync(value) {
    if (this.formValues.DataYaml !== value) {
      this.formValues.DataYaml = value;
      this.isEditorDirty = true;
    }
  }

  editorUpdate(value) {
    return this.$async(this.editorUpdateAsync, value);
  }

  async onFileLoadAsync(event) {
    const entry = new KubernetesConfigurationFormValuesEntry();
    const encoding = chardet.detect(Buffer.from(event.target.result));
    const decoder = new TextDecoder(encoding);

    entry.Key = event.target.fileName;
    entry.IsBinary = KubernetesConfigurationHelper.isBinary(encoding);

    if (!entry.IsBinary) {
      entry.Value = decoder.decode(event.target.result);
    } else {
      const stringValue = decoder.decode(event.target.result);
      entry.Value = Base64.encode(stringValue);
    }

    this.formValues.Data.push(entry);
    this.onChangeKey();
  }

  onFileLoad(event) {
    return this.$async(this.onFileLoadAsync, event);
  }

  addEntryFromFile(file) {
    if (file) {
      const temporaryFileReader = new FileReader();
      temporaryFileReader.fileName = file.name;
      temporaryFileReader.onload = this.onFileLoad;
      temporaryFileReader.readAsArrayBuffer(file);
    }
  }

  showSimpleMode() {
    this.formValues.IsSimple = true;
    this.formValues.Data = KubernetesConfigurationHelper.parseYaml(this.formValues);
    this.onChangeKey();
  }

  showAdvancedMode() {
    this.formValues.IsSimple = false;
    this.formValues.DataYaml = KubernetesConfigurationHelper.parseData(this.formValues);
  }

  $onInit() {
    this.state = {
      duplicateKeys: [],
      invalidKeys: {},
    };
  }
}

export default KubernetesConfigurationDataController;
angular.module('portainer.kubernetes').controller('KubernetesConfigurationDataController', KubernetesConfigurationDataController);