import React, {PureComponent} from 'react';
import PropTypes from 'prop-types';
import autobind from 'autobind-decorator';
import fs from 'fs';
import {clipboard, ipcRenderer, remote} from 'electron';
import {parse as urlParse} from 'url';
import HTTPSnippet from 'insomnia-httpsnippet';
import ReactDOM from 'react-dom';
import {connect} from 'react-redux';
import {bindActionCreators} from 'redux';
import Wrapper from '../components/wrapper';
import WorkspaceEnvironmentsEditModal from '../components/modals/workspace-environments-edit-modal';
import Toast from '../components/toast';
import CookiesModal from '../components/modals/cookies-modal';
import RequestSwitcherModal from '../components/modals/request-switcher-modal';
import SettingsModal, {TAB_INDEX_SHORTCUTS} from '../components/modals/settings-modal';
import {COLLAPSE_SIDEBAR_REMS, DEFAULT_PANE_HEIGHT, DEFAULT_PANE_WIDTH, DEFAULT_SIDEBAR_WIDTH, MAX_PANE_HEIGHT, MAX_PANE_WIDTH, MAX_SIDEBAR_REMS, MIN_PANE_HEIGHT, MIN_PANE_WIDTH, MIN_SIDEBAR_REMS, PREVIEW_MODE_SOURCE} from '../../common/constants';
import * as globalActions from '../redux/modules/global';
import * as db from '../../common/database';
import * as models from '../../models';
import {trackEvent} from '../../common/analytics';
import {selectActiveCookieJar, selectActiveOAuth2Token, selectActiveRequest, selectActiveRequestMeta, selectActiveRequestResponses, selectActiveResponse, selectActiveWorkspace, selectActiveWorkspaceClientCertificates, selectActiveWorkspaceMeta, selectEntitiesLists, selectSidebarChildren, selectUnseenWorkspaces, selectWorkspaceRequestsAndRequestGroups} from '../redux/selectors';
import RequestCreateModal from '../components/modals/request-create-modal';
import GenerateCodeModal from '../components/modals/generate-code-modal';
import WorkspaceSettingsModal from '../components/modals/workspace-settings-modal';
import RequestSettingsModal from '../components/modals/request-settings-modal';
import RequestRenderErrorModal from '../components/modals/request-render-error-modal';
import * as network from '../../network/network';
import {debounce, getContentDispositionHeader} from '../../common/misc';
import * as mime from 'mime-types';
import * as path from 'path';
import * as render from '../../common/render';
import {getKeys} from '../../templating/utils';
import {showAlert, showModal, showPrompt} from '../components/modals/index';
import {exportHarRequest} from '../../common/har';
import * as hotkeys from '../../common/hotkeys';
import KeydownBinder from '../components/keydown-binder';
import ErrorBoundary from '../components/error-boundary';
import * as plugins from '../../plugins';
import * as templating from '../../templating/index';
import AskModal from '../components/modals/ask-modal';

@autobind
class App extends PureComponent {
  constructor (props) {
    super(props);

    this.state = {
      showDragOverlay: false,
      draggingSidebar: false,
      draggingPaneHorizontal: false,
      draggingPaneVertical: false,
      sidebarWidth: props.sidebarWidth || DEFAULT_SIDEBAR_WIDTH,
      paneWidth: props.paneWidth || DEFAULT_PANE_WIDTH,
      paneHeight: props.paneHeight || DEFAULT_PANE_HEIGHT
    };

    this._isMigratingChildren = false;

    this._getRenderContextPromiseCache = {};

    this._savePaneWidth = debounce(paneWidth => this._updateActiveWorkspaceMeta({paneWidth}));
    this._savePaneHeight = debounce(paneHeight => this._updateActiveWorkspaceMeta({paneHeight}));
    this._saveSidebarWidth = debounce(
      sidebarWidth => this._updateActiveWorkspaceMeta({sidebarWidth}));

    this._globalKeyMap = null;
  }

  _setGlobalKeyMap () {
    this._globalKeyMap = [
      [hotkeys.SHOW_WORKSPACE_SETTINGS, () => {
        const {activeWorkspace} = this.props;
        showModal(WorkspaceSettingsModal, activeWorkspace);
      }],
      [hotkeys.SHOW_REQUEST_SETTINGS, () => {
        if (this.props.activeRequest) {
          showModal(RequestSettingsModal, {request: this.props.activeRequest});
        }
      }],
      [hotkeys.SHOW_QUICK_SWITCHER, () => {
        showModal(RequestSwitcherModal);
      }],
      [hotkeys.SEND_REQUEST, this._handleSendShortcut],
      [hotkeys.SEND_REQUEST_F5, this._handleSendShortcut],
      [hotkeys.SHOW_ENVIRONMENTS, () => {
        const {activeWorkspace} = this.props;
        showModal(WorkspaceEnvironmentsEditModal, activeWorkspace);
      }],
      [hotkeys.SHOW_COOKIES, () => {
        const {activeWorkspace} = this.props;
        showModal(CookiesModal, activeWorkspace);
      }],
      [hotkeys.CREATE_REQUEST, () => {
        const {activeRequest, activeWorkspace} = this.props;
        const parentId = activeRequest ? activeRequest.parentId : activeWorkspace._id;
        this._requestCreate(parentId);
      }],
      [hotkeys.DELETE_REQUEST, () => {
        const {activeRequest} = this.props;

        if (!activeRequest) {
          return;
        }

        showModal(AskModal, {
          title: 'Delete Request?',
          message: `Really delete ${activeRequest.name}?`,
          onDone: confirmed => {
            if (!confirmed) {
              return;
            }
            models.request.remove(activeRequest);
          }
        });
      }],
      [hotkeys.CREATE_FOLDER, () => {
        const {activeRequest, activeWorkspace} = this.props;
        const parentId = activeRequest ? activeRequest.parentId : activeWorkspace._id;
        this._requestGroupCreate(parentId);
      }],
      [hotkeys.GENERATE_CODE, async () => {
        showModal(GenerateCodeModal, this.props.activeRequest);
      }],
      [hotkeys.DUPLICATE_REQUEST, async () => {
        await this._requestDuplicate(this.props.activeRequest);
      }]
    ];
  }

  async _handleSendShortcut () {
    const {activeRequest, activeEnvironment} = this.props;
    await this._handleSendRequestWithEnvironment(
      activeRequest ? activeRequest._id : 'n/a',
      activeEnvironment ? activeEnvironment._id : 'n/a'
    );
  }

  _setRequestPaneRef (n) {
    this._requestPane = n;
  }

  _setResponsePaneRef (n) {
    this._responsePane = n;
  }

  _setSidebarRef (n) {
    this._sidebar = n;
  }

  _isDragging () {
    return (
      this.state.draggingPaneHorizontal ||
      this.state.draggingPaneVertical ||
      this.state.draggingSidebar
    );
  }

  _requestGroupCreate (parentId) {
    showPrompt({
      title: 'New Folder',
      defaultValue: 'My Folder',
      submitName: 'Create',
      label: 'Name',
      selectText: true,
      onComplete: name => {
        models.requestGroup.create({parentId, name});
      }
    });
  }

  _requestCreate (parentId) {
    showModal(RequestCreateModal, {
      parentId,
      onComplete: request => {
        this._handleSetActiveRequest(request._id);
      }
    });
  }

  async _requestGroupDuplicate (requestGroup) {
    models.requestGroup.duplicate(requestGroup);
  }

  async _requestDuplicate (request) {
    if (!request) {
      return;
    }

    const newRequest = await models.request.duplicate(request);
    await this._handleSetActiveRequest(newRequest._id);
  }

  async _workspaceDuplicate (callback) {
    const workspace = this.props.activeWorkspace;
    showPrompt({
      title: 'Duplicate Workspace',
      defaultValue: `${workspace.name} (Copy)`,
      submitName: 'Duplicate',
      selectText: true,
      onComplete: async name => {
        const newWorkspace = await db.duplicate(workspace, {name});
        await this.props.handleSetActiveWorkspace(newWorkspace._id);
        callback();
      }
    });
  }

  async _fetchRenderContext () {
    const {activeEnvironment, activeRequest} = this.props;
    const environmentId = activeEnvironment ? activeEnvironment._id : null;
    return render.getRenderContext(activeRequest, environmentId, null);
  }

  async _handleGetRenderContext () {
    const context = await this._fetchRenderContext();
    const keys = getKeys(context);
    return {context, keys};
  }

  /**
   * Heavily optimized render function
   *
   * @param text - template to render
   * @param contextCacheKey - if rendering multiple times in parallel, set this
   * @returns {Promise}
   * @private
   */
  async _handleRenderText (text, contextCacheKey = null) {
    if (!contextCacheKey || !this._getRenderContextPromiseCache[contextCacheKey]) {
      const context = this._fetchRenderContext();

      // NOTE: We're caching promises here to avoid race conditions
      this._getRenderContextPromiseCache[contextCacheKey] = context;
    }

    // Set timeout to delete the key eventually
    setTimeout(() => delete this._getRenderContextPromiseCache[contextCacheKey], 5000);

    const context = await this._getRenderContextPromiseCache[contextCacheKey];
    return render.render(text, context);
  }

  _handleGenerateCodeForActiveRequest () {
    this._handleGenerateCode(this.props.activeRequest);
  }

  _handleGenerateCode (request) {
    showModal(GenerateCodeModal, request);
  }

  async _handleCopyAsCurl (request) {
    const {activeEnvironment} = this.props;
    const environmentId = activeEnvironment ? activeEnvironment._id : 'n/a';
    const har = await exportHarRequest(request._id, environmentId);
    const snippet = new HTTPSnippet(har);
    const cmd = snippet.convert('shell', 'curl');
    clipboard.writeText(cmd);
  }

  async _updateRequestGroupMetaByParentId (requestGroupId, patch) {
    const requestGroupMeta = await models.requestGroupMeta.getByParentId(requestGroupId);
    if (requestGroupMeta) {
      await models.requestGroupMeta.update(requestGroupMeta, patch);
    } else {
      const newPatch = Object.assign({parentId: requestGroupId}, patch);
      await models.requestGroupMeta.create(newPatch);
    }
  }

  async _updateActiveWorkspaceMeta (patch) {
    const workspaceId = this.props.activeWorkspace._id;
    const workspaceMeta = await models.workspaceMeta.getOrCreateByParentId(workspaceId);
    if (workspaceMeta) {
      return models.workspaceMeta.update(workspaceMeta, patch);
    } else {
      const newPatch = Object.assign({parentId: workspaceId}, patch);
      return models.workspaceMeta.create(newPatch);
    }
  }

  async _updateRequestMetaByParentId (requestId, patch) {
    const requestMeta = await models.requestMeta.getByParentId(requestId);
    if (requestMeta) {
      return models.requestMeta.update(requestMeta, patch);
    } else {
      const newPatch = Object.assign({parentId: requestId}, patch);
      return models.requestMeta.create(newPatch);
    }
  }

  _handleSetPaneWidth (paneWidth) {
    this.setState({paneWidth});
    this._savePaneWidth(paneWidth);
  }

  _handleSetPaneHeight (paneHeight) {
    this.setState({paneHeight});
    this._savePaneHeight(paneHeight);
  }

  async _handleSetActiveRequest (activeRequestId) {
    await this._updateActiveWorkspaceMeta({activeRequestId});
  }

  async _handleSetActiveEnvironment (activeEnvironmentId) {
    await this._updateActiveWorkspaceMeta({activeEnvironmentId});

    // Give it time to update and re-render
    setTimeout(() => {
      this._wrapper._forceRequestPaneRefresh();
    }, 100);
  }

  _handleSetSidebarWidth (sidebarWidth) {
    this.setState({sidebarWidth});
    this._saveSidebarWidth(sidebarWidth);
  }

  async _handleSetSidebarHidden (sidebarHidden) {
    await this._updateActiveWorkspaceMeta({sidebarHidden});
  }

  async _handleSetSidebarFilter (sidebarFilter) {
    await this._updateActiveWorkspaceMeta({sidebarFilter});
  }

  _handleSetRequestGroupCollapsed (requestGroupId, collapsed) {
    this._updateRequestGroupMetaByParentId(requestGroupId, {collapsed});
  }

  _handleSetResponsePreviewMode (requestId, previewMode) {
    this._updateRequestMetaByParentId(requestId, {previewMode});
  }

  async _handleSetResponseFilter (requestId, responseFilter) {
    await this._updateRequestMetaByParentId(requestId, {responseFilter});

    clearTimeout(this._responseFilterHistorySaveTimeout);
    this._responseFilterHistorySaveTimeout = setTimeout(async () => {
      const meta = await models.requestMeta.getByParentId(requestId);
      const responseFilterHistory = meta.responseFilterHistory.slice(0, 10);

      // Already in history?
      if (responseFilterHistory.includes(responseFilter)) {
        return;
      }

      // Blank?
      if (!responseFilter) {
        return;
      }

      responseFilterHistory.unshift(responseFilter);
      await this._updateRequestMetaByParentId(requestId, {responseFilterHistory});
    }, 2000);
  }

  async _handleSendAndDownloadRequestWithEnvironment (requestId, environmentId, dir) {
    const request = await models.request.getById(requestId);
    if (!request) {
      return;
    }

    // NOTE: Since request is by far the most popular event, we will throttle
    // it so that we only track it if the request has changed since the last one
    const key = request._id;
    if (this._sendRequestTrackingKey !== key) {
      trackEvent('Request', 'Send and Download');
      this._sendRequestTrackingKey = key;
    }

    // Start loading
    this.props.handleStartLoading(requestId);

    try {
      const responsePatch = await network.send(requestId, environmentId);
      const headers = responsePatch.headers || [];
      const header = getContentDispositionHeader(headers);
      const nameFromHeader = header ? header.value : null;

      if (!responsePatch.bodyPath) {
        return;
      }

      if (responsePatch.statusCode >= 200 && responsePatch.statusCode < 300) {
        const extension = mime.extension(responsePatch.contentType) || 'unknown';
        const name = nameFromHeader || `${request.name.replace(/\s/g, '-').toLowerCase()}.${extension}`;

        const filename = path.join(dir, name);
        const to = fs.createWriteStream(filename);
        const readStream = models.response.getBodyStream(responsePatch);

        if (!readStream) {
          return;
        }

        readStream.pipe(to);

        readStream.on('end', async () => {
          trackEvent('Response', 'Download After Save Success');
          responsePatch.error = `Saved to ${filename}`;
          await models.response.create(responsePatch);
        });

        readStream.on('error', async err => {
          console.warn('Failed to download request after sending', responsePatch.bodyPath, err);
          trackEvent('Response', 'Download After Save Failed');
          await models.response.create(responsePatch);
        });
      }
    } catch (err) {
      showAlert({
        title: 'Unexpected Request Failure',
        message: (
          <div>
            <p>The request failed due to an unhandled error:</p>
            <code className="wide selectable">
              <pre>{err.message}</pre>
            </code>
          </div>
        )
      });
    }

    // Unset active response because we just made a new one
    await this._updateRequestMetaByParentId(requestId, {activeResponseId: null});

    // Stop loading
    this.props.handleStopLoading(requestId);
  }

  async _handleSendRequestWithEnvironment (requestId, environmentId) {
    const request = await models.request.getById(requestId);
    if (!request) {
      return;
    }

    // NOTE: Since request is by far the most popular event, we will throttle
    // it so that we only track it if the request has changed since the last noe
    const key = `${request._id}::${request.modified}`;
    if (this._sendRequestTrackingKey !== key) {
      trackEvent('Request', 'Send');
      this._sendRequestTrackingKey = key;
    }

    this.props.handleStartLoading(requestId);

    try {
      const responsePatch = await network.send(requestId, environmentId);
      await models.response.create(responsePatch);
    } catch (err) {
      if (err.type === 'render') {
        showModal(RequestRenderErrorModal, {request, error: err});
      } else {
        showAlert({
          title: 'Unexpected Request Failure',
          message: (
            <div>
              <p>The request failed due to an unhandled error:</p>
              <code className="wide selectable">
                <pre>{err.message}</pre>
              </code>
            </div>
          )
        });
      }
    }

    // Unset active response because we just made a new one
    await this._updateRequestMetaByParentId(requestId, {activeResponseId: null});

    // Stop loading
    this.props.handleStopLoading(requestId);
  }

  async _handleSetActiveResponse (requestId, activeResponse = null) {
    const activeResponseId = activeResponse ? activeResponse._id : null;
    await this._updateRequestMetaByParentId(requestId, {activeResponseId});

    let response;
    if (activeResponseId) {
      response = await models.response.getById(activeResponseId);
    } else {
      response = await models.response.getLatestForRequest(requestId);
    }

    const requestVersionId = response ? response.requestVersionId : 'n/a';
    const request = await models.requestVersion.restore(requestVersionId);

    if (request) {
      // Refresh app to reflect changes. Using timeout because we need to
      // wait for the request update to propagate.
      setTimeout(() => this._wrapper._forceRequestPaneRefresh(), 500);
    } else {
      // Couldn't restore request. That's okay
    }
  }

  _requestCreateForWorkspace () {
    this._requestCreate(this.props.activeWorkspace._id);
  }

  _startDragSidebar () {
    trackEvent('Sidebar', 'Drag');
    this.setState({draggingSidebar: true});
  }

  _resetDragSidebar () {
    trackEvent('Sidebar', 'Drag');
    // TODO: Remove setTimeout need be not triggering drag on double click
    setTimeout(() => this._handleSetSidebarWidth(DEFAULT_SIDEBAR_WIDTH), 50);
  }

  _startDragPaneHorizontal () {
    trackEvent('App Pane', 'Drag Start');
    this.setState({draggingPaneHorizontal: true});
  }

  _startDragPaneVertical () {
    trackEvent('App Pane', 'Drag Start Vertical');
    this.setState({draggingPaneVertical: true});
  }

  _resetDragPaneHorizontal () {
    trackEvent('App Pane', 'Drag Reset');
    // TODO: Remove setTimeout need be not triggering drag on double click
    setTimeout(() => this._handleSetPaneWidth(DEFAULT_PANE_WIDTH), 50);
  }

  _resetDragPaneVertical () {
    trackEvent('App Pane', 'Drag Reset Vertical');
    // TODO: Remove setTimeout need be not triggering drag on double click
    setTimeout(() => this._handleSetPaneHeight(DEFAULT_PANE_HEIGHT), 50);
  }

  _handleMouseMove (e) {
    if (this.state.draggingPaneHorizontal) {
      // Only pop the overlay after we've moved it a bit (so we don't block doubleclick);
      const distance = this.props.paneWidth - this.state.paneWidth;
      if (!this.state.showDragOverlay && Math.abs(distance) > 0.02 /* % */) {
        this.setState({showDragOverlay: true});
      }

      const requestPane = ReactDOM.findDOMNode(this._requestPane);
      const responsePane = ReactDOM.findDOMNode(this._responsePane);

      const requestPaneWidth = requestPane.offsetWidth;
      const responsePaneWidth = responsePane.offsetWidth;

      const pixelOffset = e.clientX - requestPane.offsetLeft;
      let paneWidth = pixelOffset / (requestPaneWidth + responsePaneWidth);
      paneWidth = Math.min(Math.max(paneWidth, MIN_PANE_WIDTH), MAX_PANE_WIDTH);

      this._handleSetPaneWidth(paneWidth);
    } else if (this.state.draggingPaneVertical) {
      // Only pop the overlay after we've moved it a bit (so we don't block doubleclick);
      const distance = this.props.paneHeight - this.state.paneHeight;
      if (!this.state.showDragOverlay && Math.abs(distance) > 0.02 /* % */) {
        this.setState({showDragOverlay: true});
      }

      const requestPane = ReactDOM.findDOMNode(this._requestPane);
      const responsePane = ReactDOM.findDOMNode(this._responsePane);

      const requestPaneHeight = requestPane.offsetHeight;
      const responsePaneHeight = responsePane.offsetHeight;

      const pixelOffset = e.clientY - requestPane.offsetTop;
      let paneHeight = pixelOffset / (requestPaneHeight + responsePaneHeight);
      paneHeight = Math.min(Math.max(paneHeight, MIN_PANE_HEIGHT), MAX_PANE_HEIGHT);

      this._handleSetPaneHeight(paneHeight);
    } else if (this.state.draggingSidebar) {
      // Only pop the overlay after we've moved it a bit (so we don't block doubleclick);
      const distance = this.props.sidebarWidth - this.state.sidebarWidth;
      if (!this.state.showDragOverlay && Math.abs(distance) > 2 /* ems */) {
        this.setState({showDragOverlay: true});
      }

      const currentPixelWidth = ReactDOM.findDOMNode(this._sidebar).offsetWidth;
      const ratio = e.clientX / currentPixelWidth;
      const width = this.state.sidebarWidth * ratio;

      let sidebarWidth = Math.min(width, MAX_SIDEBAR_REMS);

      if (sidebarWidth < COLLAPSE_SIDEBAR_REMS) {
        sidebarWidth = MIN_SIDEBAR_REMS;
      }

      this._handleSetSidebarWidth(sidebarWidth);
    }
  }

  _handleMouseUp () {
    if (this.state.draggingSidebar) {
      this.setState({draggingSidebar: false, showDragOverlay: false});
    }

    if (this.state.draggingPaneHorizontal) {
      this.setState({draggingPaneHorizontal: false, showDragOverlay: false});
    }

    if (this.state.draggingPaneVertical) {
      this.setState({draggingPaneVertical: false, showDragOverlay: false});
    }
  }

  _handleKeyDown (e) {
    for (const [definition, callback] of this._globalKeyMap) {
      hotkeys.executeHotKey(e, definition, callback);
    }
  }

  _handleToggleMenuBar (hide) {
    for (const win of remote.BrowserWindow.getAllWindows()) {
      if (win.isMenuBarAutoHide() !== hide) {
        win.setAutoHideMenuBar(hide);
        win.setMenuBarVisibility(!hide);
      }
    }
  }

  async _handleToggleSidebar () {
    const sidebarHidden = !this.props.sidebarHidden;
    await this._handleSetSidebarHidden(sidebarHidden);
    trackEvent('Sidebar', 'Toggle Visibility', sidebarHidden ? 'Hide' : 'Show');
  }

  _setWrapperRef (n) {
    this._wrapper = n;
  }

  /**
   * Update document.title to be "Workspace (Environment) – Request"
   * @private
   */
  _updateDocumentTitle () {
    const {
      activeWorkspace,
      activeEnvironment,
      activeRequest
    } = this.props;

    let title = activeWorkspace.name;

    if (activeEnvironment) {
      title += ` (${activeEnvironment.name})`;
    }

    if (activeRequest) {
      title += ` – ${activeRequest.name}`;
    }

    document.title = title;
  }

  componentDidUpdate () {
    this._updateDocumentTitle();
  }

  async componentDidMount () {
    // Bind mouse and key handlers
    document.addEventListener('mouseup', this._handleMouseUp);
    document.addEventListener('mousemove', this._handleMouseMove);
    this._setGlobalKeyMap();

    // Update title
    this._updateDocumentTitle();

    db.onChange(async changes => {
      for (const change of changes) {
        const [
          _, // eslint-disable-line no-unused-vars
          doc,
          fromSync
        ] = change;

        const {activeRequest} = this.props;

        // No active request, so we don't need to force refresh anything
        if (!activeRequest) {
          return;
        }

        // Force refresh if environment changes
        // TODO: Only do this for environments in this workspace (not easy because they're nested)
        if (doc.type === models.environment.type) {
          console.log('[App] Forcing update from environment change', change);
          this._wrapper._forceRequestPaneRefresh();
        }

        // Force refresh if sync changes the active request
        if (fromSync && doc._id === activeRequest._id) {
          this._wrapper._forceRequestPaneRefresh();
          console.log('[App] Forcing update from request change', change);
        }
      }
    });

    ipcRenderer.on('toggle-preferences', () => {
      showModal(SettingsModal);
    });

    ipcRenderer.on('reload-plugins', async () => {
      await plugins.getPlugins(true);
      templating.reload();
      console.log('[plugins] reloaded');
    });

    ipcRenderer.on('toggle-preferences-shortcuts', () => {
      showModal(SettingsModal, TAB_INDEX_SHORTCUTS);
    });

    ipcRenderer.on('run-command', (e, commandUri) => {
      const parsed = urlParse(commandUri, true);

      const command = `${parsed.hostname}${parsed.pathname}`;
      const args = JSON.parse(JSON.stringify(parsed.query));
      args.workspaceId = args.workspaceId || this.props.activeWorkspace._id;

      this.props.handleCommand(command, args);
    });

    // NOTE: This is required for "drop" event to trigger.
    document.addEventListener('dragover', e => {
      e.preventDefault();
    }, false);

    document.addEventListener('drop', async e => {
      e.preventDefault();
      const {activeWorkspace, handleImportUriToWorkspace} = this.props;
      if (!activeWorkspace) {
        return;
      }

      if (e.dataTransfer.files.length === 0) {
        console.log('[drag] Ignored drop event because no files present');
        return;
      }

      const file = e.dataTransfer.files[0];
      const {path} = file;
      const uri = `file://${path}`;

      await showAlert({
        title: 'Confirm Data Import',
        message: <span>Import <code>{path}</code>?</span>,
        addCancel: true
      });

      handleImportUriToWorkspace(activeWorkspace._id, uri);
    }, false);

    ipcRenderer.on('toggle-sidebar', this._handleToggleSidebar);

    // handle this
    this._handleToggleMenuBar(this.props.settings.autoHideMenuBar);

    // Give it a bit before letting the backend know it's ready
    setTimeout(() => ipcRenderer.send('window-ready'), 500);
  }

  componentWillUnmount () {
    // Remove mouse and key handlers
    document.removeEventListener('mouseup', this._handleMouseUp);
    document.removeEventListener('mousemove', this._handleMouseMove);
  }

  async _ensureWorkspaceChildren (props) {
    const {activeWorkspace, activeCookieJar, environments} = props;
    const baseEnvironments = environments.filter(e => e.parentId === activeWorkspace._id);

    // Nothing to do
    if (baseEnvironments.length && activeCookieJar) {
      return;
    }

    // We already started migrating. Let it finish.
    if (this._isMigratingChildren) {
      return;
    }

    // Prevent rendering of everything
    this._isMigratingChildren = true;

    await db.bufferChanges();
    if (baseEnvironments.length === 0) {
      await models.environment.create({parentId: activeWorkspace._id});
      console.log(`[app] Created missing base environment for ${activeWorkspace.name}`);
    }

    if (!activeCookieJar) {
      await models.cookieJar.create({parentId: this.props.activeWorkspace._id});
      console.log(`[app] Created missing cookie jar for ${activeWorkspace.name}`);
    }

    await db.flushChanges();

    // Flush "transaction"
    this._isMigratingChildren = false;
  }

  componentWillReceiveProps (nextProps) {
    this._ensureWorkspaceChildren(nextProps);
  }

  componentWillMount () {
    this._ensureWorkspaceChildren(this.props);
  }

  render () {
    if (this._isMigratingChildren) {
      console.log('[app] Waiting for migration to complete');
      return null;
    }

    return (
      <KeydownBinder onKeydown={this._handleKeyDown}>
        <div className="app">
          <ErrorBoundary showAlert>
            <Wrapper
              {...this.props}
              ref={this._setWrapperRef}
              paneWidth={this.state.paneWidth}
              paneHeight={this.state.paneHeight}
              sidebarWidth={this.state.sidebarWidth}
              handleCreateRequestForWorkspace={this._requestCreateForWorkspace}
              handleSetRequestGroupCollapsed={this._handleSetRequestGroupCollapsed}
              handleActivateRequest={this._handleSetActiveRequest}
              handleSetRequestPaneRef={this._setRequestPaneRef}
              handleSetResponsePaneRef={this._setResponsePaneRef}
              handleSetSidebarRef={this._setSidebarRef}
              handleStartDragSidebar={this._startDragSidebar}
              handleResetDragSidebar={this._resetDragSidebar}
              handleStartDragPaneHorizontal={this._startDragPaneHorizontal}
              handleStartDragPaneVertical={this._startDragPaneVertical}
              handleResetDragPaneHorizontal={this._resetDragPaneHorizontal}
              handleResetDragPaneVertical={this._resetDragPaneVertical}
              handleCreateRequest={this._requestCreate}
              handleRender={this._handleRenderText}
              handleGetRenderContext={this._handleGetRenderContext}
              handleDuplicateRequest={this._requestDuplicate}
              handleDuplicateRequestGroup={this._requestGroupDuplicate}
              handleDuplicateWorkspace={this._workspaceDuplicate}
              handleCreateRequestGroup={this._requestGroupCreate}
              handleGenerateCode={this._handleGenerateCode}
              handleGenerateCodeForActiveRequest={this._handleGenerateCodeForActiveRequest}
              handleCopyAsCurl={this._handleCopyAsCurl}
              handleSetResponsePreviewMode={this._handleSetResponsePreviewMode}
              handleSetResponseFilter={this._handleSetResponseFilter}
              handleSendRequestWithEnvironment={this._handleSendRequestWithEnvironment}
              handleSendAndDownloadRequestWithEnvironment={this._handleSendAndDownloadRequestWithEnvironment}
              handleSetActiveResponse={this._handleSetActiveResponse}
              handleSetActiveRequest={this._handleSetActiveRequest}
              handleSetActiveEnvironment={this._handleSetActiveEnvironment}
              handleSetSidebarFilter={this._handleSetSidebarFilter}
              handleToggleMenuBar={this._handleToggleMenuBar}
            />
          </ErrorBoundary>

          <ErrorBoundary showAlert>
            <Toast/>
          </ErrorBoundary>

          {/* Block all mouse activity by showing an overlay while dragging */}
          {this.state.showDragOverlay ? <div className="blocker-overlay"></div> : null}
        </div>
      </KeydownBinder>
    );
  }
}

App.propTypes = {
  // Required
  sidebarWidth: PropTypes.number.isRequired,
  paneWidth: PropTypes.number.isRequired,
  paneHeight: PropTypes.number.isRequired,
  handleCommand: PropTypes.func.isRequired,
  settings: PropTypes.object.isRequired,
  activeWorkspace: PropTypes.shape({
    _id: PropTypes.string.isRequired
  }).isRequired,
  handleSetActiveWorkspace: PropTypes.func.isRequired,

  // Optional
  activeRequest: PropTypes.object,
  activeEnvironment: PropTypes.shape({
    _id: PropTypes.string.isRequired
  })
};

function mapStateToProps (state, props) {
  const {
    entities,
    global
  } = state;

  const {
    isLoading,
    loadingRequestIds
  } = global;

  // Entities
  const entitiesLists = selectEntitiesLists(state, props);
  const {
    workspaces,
    environments,
    requests,
    requestGroups
  } = entitiesLists;

  const settings = entitiesLists.settings[0];

  // Workspace stuff
  const workspaceMeta = selectActiveWorkspaceMeta(state, props) || {};
  const activeWorkspace = selectActiveWorkspace(state, props);
  const activeWorkspaceClientCertificates = selectActiveWorkspaceClientCertificates(state, props);
  const sidebarHidden = workspaceMeta.sidebarHidden || false;
  const sidebarFilter = workspaceMeta.sidebarFilter || '';
  const sidebarWidth = workspaceMeta.sidebarWidth || DEFAULT_SIDEBAR_WIDTH;
  const paneWidth = workspaceMeta.paneWidth || DEFAULT_PANE_WIDTH;
  const paneHeight = workspaceMeta.paneHeight || DEFAULT_PANE_HEIGHT;

  // Request stuff
  const requestMeta = selectActiveRequestMeta(state, props) || {};
  const activeRequest = selectActiveRequest(state, props);
  const responsePreviewMode = requestMeta.previewMode || PREVIEW_MODE_SOURCE;
  const responseFilter = requestMeta.responseFilter || '';
  const responseFilterHistory = requestMeta.responseFilterHistory || [];

  // Cookie Jar
  const activeCookieJar = selectActiveCookieJar(state, props);

  // Response stuff
  const activeRequestResponses = selectActiveRequestResponses(state, props) || [];
  const activeResponse = selectActiveResponse(state, props) || null;

  // Environment stuff
  const activeEnvironmentId = workspaceMeta.activeEnvironmentId;
  const activeEnvironment = entities.environments[activeEnvironmentId];

  // OAuth2Token stuff
  const oAuth2Token = selectActiveOAuth2Token(state, props);

  // Find other meta things
  const loadStartTime = loadingRequestIds[activeRequest ? activeRequest._id : 'n/a'] || -1;
  const sidebarChildren = selectSidebarChildren(state, props);
  const workspaceChildren = selectWorkspaceRequestsAndRequestGroups(state, props);
  const unseenWorkspaces = selectUnseenWorkspaces(state, props);

  return Object.assign({}, state, {
    settings,
    workspaces,
    unseenWorkspaces,
    requestGroups,
    requests,
    oAuth2Token,
    isLoading,
    loadStartTime,
    activeWorkspace,
    activeWorkspaceClientCertificates,
    activeRequest,
    activeRequestResponses,
    activeResponse,
    activeCookieJar,
    sidebarHidden,
    sidebarFilter,
    sidebarWidth,
    paneWidth,
    paneHeight,
    responsePreviewMode,
    responseFilter,
    responseFilterHistory,
    sidebarChildren,
    environments,
    activeEnvironment,
    workspaceChildren
  });
}

function mapDispatchToProps (dispatch) {
  const global = bindActionCreators(globalActions, dispatch);

  return {
    handleStartLoading: global.loadRequestStart,
    handleStopLoading: global.loadRequestStop,

    handleSetActiveWorkspace: global.setActiveWorkspace,
    handleImportFileToWorkspace: global.importFile,
    handleImportUriToWorkspace: global.importUri,
    handleCommand: global.newCommand,
    handleExportFile: global.exportFile,
    handleMoveDoc: _moveDoc
  };
}

async function _moveDoc (docToMove, parentId, targetId, targetOffset) {
  // Nothing to do. We are in the same spot as we started
  if (docToMove._id === targetId) {
    return;
  }

  // Don't allow dragging things into itself or children. This will disconnect
  // the node from the tree and cause the item to no longer show in the UI.
  const descendents = await db.withDescendants(docToMove);
  for (const doc of descendents) {
    if (doc._id === parentId) {
      return;
    }
  }

  function __updateDoc (doc, patch) {
    models.getModel(docToMove.type).update(doc, patch);
  }

  if (targetId === null) {
    // We are moving to an empty area. No sorting required
    await __updateDoc(docToMove, {parentId});
    return;
  }

  // NOTE: using requestToTarget's parentId so we can switch parents!
  let docs = [
    ...await models.request.findByParentId(parentId),
    ...await models.requestGroup.findByParentId(parentId)
  ].sort((a, b) => a.metaSortKey < b.metaSortKey ? -1 : 1);

  // Find the index of doc B so we can re-order and save everything
  for (let i = 0; i < docs.length; i++) {
    const doc = docs[i];

    if (doc._id === targetId) {
      let before, after;
      if (targetOffset < 0) {
        // We're moving to below
        before = docs[i];
        after = docs[i + 1];
      } else {
        // We're moving to above
        before = docs[i - 1];
        after = docs[i];
      }

      const beforeKey = before ? before.metaSortKey : docs[0].metaSortKey - 100;
      const afterKey = after ? after.metaSortKey : docs[docs.length - 1].metaSortKey + 100;

      if (Math.abs(afterKey - beforeKey) < 0.000001) {
        // If sort keys get too close together, we need to redistribute the list. This is
        // not performant at all (need to update all siblings in DB), but it is extremely rare
        // anyway
        console.log(`[app] Recreating Sort Keys ${beforeKey} ${afterKey}`);

        await db.bufferChanges(300);
        docs.map((r, i) => __updateDoc(r, {metaSortKey: i * 100, parentId}));
      } else {
        const metaSortKey = afterKey - ((afterKey - beforeKey) / 2);
        __updateDoc(docToMove, {metaSortKey, parentId});
      }

      break;
    }
  }
}

export default connect(mapStateToProps, mapDispatchToProps)(App);