// base-client.js
// Copyright (C) 2024 DTP Technologies, LLC
// All Rights Reserved

'use strict';

const dtp = window.dtp = window.dtp || { };

import DtpApp from 'lib/dtp-app.js';
import BaseAudio from './base-audio.js';

import QRCode from 'qrcode';
import Cropper from 'cropperjs';

import dayjs from 'dayjs';
import dayjsRelativeTime from 'dayjs/plugin/relativeTime.js';
dayjs.extend(dayjsRelativeTime);

export class BaseApp extends DtpApp {

  static get SFX_SAMPLE_SOUND ( ) { return 'sample-sound'; }

  constructor (user) {
    super('BaseApp', user);

    this.loadSettings();

    this.notificationPermission = 'default';
    this.haveFocus = true; // hard to load the app w/o also being the focused app

    window.addEventListener('dtp-load', this.onDtpLoad.bind(this));
    window.addEventListener('focus', this.onWindowFocus.bind(this));
    window.addEventListener('blur', this.onWindowBlur.bind(this));

    /*
     * Page Visibility API hooks
     */
    window.addEventListener('pageshow', this.onWindowPageShow.bind(this));
    window.addEventListener('pagehide', this.onWindowPageHide.bind(this));
    window.addEventListener('freeze', this.onWindowFreeze.bind(this));
    window.addEventListener('resume', this.onWindowResume.bind(this));

    this.updateTimestamps();

    this.log.info('constructor', 'BaseApp client online');
  }

  async onDtpLoad ( ) {
    this.log.info('onDtpLoad', 'dtp-load event received. Connecting to platform.');

    await this.connect({
      mode: 'User',
      onSocketConnect: this.onBaseSocketConnect.bind(this),
      onSocketDisconnect: this.onBaseSocketDisconnect.bind(this),
    });
  }

  async onWindowFocus (event) {
    this.log.debug('onWindowFocus', 'window has received focus', { event });
    this.haveFocus = true;
  }

  async onWindowBlur (event) {
    this.log.debug('onWindowBlur', 'window has lost focus', { event });
    this.haveFocus = false;
  }

  async onWindowPageShow (event) {
    this.log.debug('onWindowPageShow', 'the page is being shown', { event });
  }

  async onWindowPageHide (event) {
    this.log.debug('onWindowPageHide', 'the page is being hidden', { event });
    if (!event.persisted) {
      await this.socket.disconnect();
    }
  }

  async onWindowFreeze (event) {
    this.log.debug('onWindowFreeze', 'the page is being frozen', { event });
  }

  async onWindowResume (event) {
    this.log.debug('onWindowResume', 'the page is being resumed', { event });
  }

  async startAudio ( ) {
    this.log.info('startAudio', 'starting audio');
    this.audio = new BaseAudio();
    this.audio.start();
    try {
      await Promise.all([
        this.audio.loadSound(BaseApp.SFX_SAMPLE_SOUND, '/static/sfx/sample-sound.mp3'),
      ]);
    } catch (error) {
      this.log.error('startAudio', 'failed to load sound', { error });
      // fall through
    }
  }

  async onBaseSocketConnect (socket) {
    this.log.debug('onSocketConnect', 'attaching socket events');

    this.systemMessageHandler = this.onSystemMessage.bind(this);
    socket.on('system-message', this.systemMessageHandler);
  }

  async onBaseSocketDisconnect (socket) {
    this.log.debug('onSocketDisconnect', 'detaching socket events');

    socket.off('system-message', this.systemMessageHandler);
    delete this.systemMessageHandler;

    if (this.taskSession) {
      await this.setTaskSessionStatus('reconnecting');
    }
  }

  async onSystemMessage (message) {
    if (message.displayList) {
      this.displayEngine.executeDisplayList(message.displayList);
    }
  }

  async confirmNavigation (event) {
    const target = event.currentTarget || event.target;
    event.preventDefault();
    event.stopPropagation();

    const href = target.getAttribute('href');
    const hrefTarget = target.getAttribute('target');
    const text = target.textContent;
    const whitelist = [
      'digitaltelepresence.com',
      'www.digitaltelepresence.com',
    ];
    try {
      const url = new URL(href);
      if (!whitelist.includes(url.hostname)) {
        await UIkit.modal.confirm(`<p>You are navigating to <code>${href}</code>, a link or button that was displayed as:</p><p>${text}</p><div class="uk-text-small uk-text-danger">Please only open links to destinations you trust and want to visit.</div>`);
      }
      window.open(href, hrefTarget);
    } catch (error) {
      this.log.info('confirmNavigation', 'navigation canceled', { error });
    }

    return true;
  }

  async generateOtpQR (canvas, keyURI) {
    QRCode.toCanvas(canvas, keyURI);
  }

  async generateQRCanvas (canvas, uri) {
    this.log.info('generateQRCanvas', 'creating QR code canvas', { uri });
    QRCode.toCanvas(canvas, uri, { width: 256 });
  }

  async closeAllDropdowns ( ) {
    const dropdowns = document.querySelectorAll('.uk-dropdown.uk-open');
    for (const dropdown of dropdowns) {
      this.log.info('closeAllDropdowns', 'closing dropdown', { dropdown });
      UIkit.dropdown(dropdown).hide(false);
    }
  }

  async initSettingsView ( ) {
    this.log.info('initSettingsView', 'settings', { settings: this.settings });
  }

  loadSettings ( ) {
    this.settings = { };
    if (window.localStorage) {
      if (window.localStorage.settings) {
        this.settings = JSON.parse(window.localStorage.settings);
      } else {
        this.saveSettings();
      }
    }
  }

  saveSettings ( ) {
    if (!window.localStorage) { return; }
    window.localStorage.settings = JSON.stringify(this.settings);
  }

  async submitImageForm (event) {
    event.preventDefault();
    event.stopPropagation();

    const formElement = event.currentTarget || event.target;
    const form = new FormData(formElement);

    this.cropper.getCroppedCanvas().toBlob(async (imageData) => {
      try {
        const imageId = formElement.getAttribute('data-image-id');
        form.append('imageFile', imageData, imageId);
  
        this.log.info('submitImageForm', 'uploading image', { event, action: formElement.action });
        const response = await fetch(formElement.action, {
          method: formElement.method,
          body: form,
        });
        await this.processResponse(response);
      } catch (error) {
        UIkit.modal.alert(`Failed to upload image: ${error.message}`);
      }
    });

    return;
  }

  async selectImageFile (event) {
    event.preventDefault();

    const imageId = event.target.getAttribute('data-image-id');

    let cropperOptions = event.target.getAttribute('data-cropper-options');
    if (cropperOptions) {
      cropperOptions = JSON.parse(cropperOptions);
    }

    const fileSelectContainerId = event.target.getAttribute('data-file-select-container');
    if (!fileSelectContainerId) {
      UIkit.modal.alert('Missing file select container element ID information');
      return;
    }

    const fileSelectContainer = document.getElementById(fileSelectContainerId);
    if (!fileSelectContainer) {
      UIkit.modal.alert('Missing file select element');
      return;
    }

    const fileSelect = fileSelectContainer.querySelector('input[type="file"]');
    if (!fileSelect.files || (fileSelect.files.length === 0)) {
      return;
    }

    const selectedFile = fileSelect.files[0];
    if (!selectedFile) {
      return;
    }

    this.log.debug('selectImageFile', 'thumbnail file select', { event, selectedFile });

    const filter = /^(image\/jpg|image\/jpeg|image\/png)$/i;
    if (!filter.test(selectedFile.type)) {
      UIkit.modal.alert(`Unsupported image file type selected: ${selectedFile.type}`);
      return;
    }

    const fileSizeId = event.target.getAttribute('data-file-size-element');
    const FILE_MAX_SIZE = parseInt(fileSelect.getAttribute('data-file-max-size'), 10);
    const fileSize = document.getElementById(fileSizeId);
    fileSize.textContent = numeral(selectedFile.size).format('0,0.0b');
    if (selectedFile.size > (FILE_MAX_SIZE)) {
      UIkit.modal.alert(`File is too large: ${fileSize.textContent}. Custom thumbnail images may be up to ${numeral(FILE_MAX_SIZE).format('0,0.00b')} in size.`);
      return;
    }

    const reader = new FileReader();
    reader.onload = (e) => {
      const img = document.getElementById(imageId);
      img.onload = (e) => {
        console.log('image loaded', e, img.naturalWidth, img.naturalHeight);

        fileSelectContainer.querySelector('#file-name').textContent = selectedFile.name;
        fileSelectContainer.querySelector('#file-modified').textContent = dayjs(selectedFile.lastModifiedDate).fromNow();
        fileSelectContainer.querySelector('#image-resolution-w').textContent = img.naturalWidth.toString();
        fileSelectContainer.querySelector('#image-resolution-h').textContent = img.naturalHeight.toString();

        fileSelectContainer.querySelector('#file-select').setAttribute('hidden', true);
        fileSelectContainer.querySelector('#file-info').removeAttribute('hidden');

        fileSelectContainer.querySelector('#file-save-btn').removeAttribute('hidden');
      };

      img.src = e.target.result;
      this.createImageCropper(img, cropperOptions);
    };

    reader.readAsDataURL(selectedFile);
  }

  async createImageCropper (img, options) {
    // https://github.com/fengyuanchen/cropperjs/blob/main/README.md#options
    options = Object.assign({
      aspectRatio: 1,
      viewMode: 1, // restrict the crop box not to exceed the size of the canvas
      dragMode: 'move',
      autoCropArea: 0.85,
      restore: false,
      guides: false,
      center: false,
      highlight: false,
      cropBoxMovable: true,
      cropBoxResizable: true,
      toggleDragModeOnDblclick: false,
      modal: true,
    }, options);
    this.log.info("createImageCropper", "Creating image cropper", { img });
    this.cropper = new Cropper(img, options);
  }

  async removeImageFile (event) {
    const target = event.target || event.currentTarget;
    const imageType = target.getAttribute('data-image-type');

    try {
      this.log.info('removeImageFile', 'request to remove image', event);

      let imageUrl;
      switch (imageType) {
        case 'profile-picture-file':
          imageUrl = `/user/${this.user._id}/profile-photo`;
          break;

        default:
          throw new Error(`Invalid image type: ${imageType}`);
      }

      const response = await fetch(imageUrl, { method: 'DELETE' });
      if (!response.ok) {
        throw new Error('Server error');
      }

      await this.processResponse(response);
    } catch (error) {
      this.log.error('removeImageFile', 'failed to remove image', { error });
      UIkit.modal.alert(`Failed to remove image: ${error.message}`);
    }
  }

  async onWindowResize ( ) {
    if (this.chat.messageList && this.chat.isAtBottom) {
      this.chat.messageList.scrollTo(0, this.chat.messageList.scrollHeight + 50000);
    }
  }
}