import * as React from "react";
import * as NavigationData from "~/common/navigation-data";
import * as Actions from "~/common/actions";
import * as Strings from "~/common/strings";
import * as State from "~/common/state";
import * as Credentials from "~/common/credentials";
import * as Validations from "~/common/validations";
import * as FileUtilities from "~/common/file-utilities";
import * as System from "~/components/system";
import * as Window from "~/common/window";

// NOTE(jim):
// Scenes each have an ID and can be navigated to with _handleAction
import SceneDeals from "~/scenes/SceneDeals";
import SceneEditAccount from "~/scenes/SceneEditAccount";
import SceneFile from "~/scenes/SceneFile";
import SceneFilesFolder from "~/scenes/SceneFilesFolder";
import SceneHome from "~/scenes/SceneHome";
import SceneSettings from "~/scenes/SceneSettings";
import SceneWallet from "~/scenes/SceneWallet";
import SceneSlates from "~/scenes/SceneSlates";
import SceneLocalData from "~/scenes/SceneLocalData";
import SceneSettingsDeveloper from "~/scenes/SceneSettingsDeveloper";
import SceneSignIn from "~/scenes/SceneSignIn";
import SceneSlate from "~/scenes/SceneSlate";
import SceneActivity from "~/scenes/SceneActivity";
import SceneDirectory from "~/scenes/SceneDirectory";
import SceneProfile from "~/scenes/SceneProfile";
import SceneSentinel from "~/scenes/SceneSentinel";
import ScenePublicProfile from "~/scenes/ScenePublicProfile";
import ScenePublicSlate from "~/scenes/ScenePublicSlate";
import SceneArchive from "~/scenes/SceneArchive";
import SceneMakeFilecoinDeal from "~/scenes/SceneMakeFilecoinDeal";
import SceneEncryptedData from "~/scenes/SceneEncryptedData";
import SceneMiners from "~/scenes/SceneMiners";

// NOTE(jim):
// Sidebars each have a decorator and can be shown to with _handleAction
import SidebarCreateSlate from "~/components/sidebars/SidebarCreateSlate";
import SidebarCreateWalletAddress from "~/components/sidebars/SidebarCreateWalletAddress";
import SidebarWalletSendFunds from "~/components/sidebars/SidebarWalletSendFunds";
import SidebarFileStorageDeal from "~/components/sidebars/SidebarFileStorageDeal";
import SidebarAddFileToBucket from "~/components/sidebars/SidebarAddFileToBucket";
import SidebarAddFileToSlate from "~/components/sidebars/SidebarAddFileToSlate";
import SidebarDragDropNotice from "~/components/sidebars/SidebarDragDropNotice";
import SidebarSingleSlateSettings from "~/components/sidebars/SidebarSingleSlateSettings";
import SidebarFilecoinArchive from "~/components/sidebars/SidebarFilecoinArchive";
import SidebarHelp from "~/components/sidebars/SidebarHelp";

// NOTE(jim):
// Core components to the application structure.
import ApplicationNavigation from "~/components/core/ApplicationNavigation";
import ApplicationHeader from "~/components/core/ApplicationHeader";
import ApplicationLayout from "~/components/core/ApplicationLayout";
import WebsitePrototypeWrapper from "~/components/core/WebsitePrototypeWrapper";
import Cookies from "universal-cookie";

import { GlobalViewerCID } from "~/components/core/viewers/GlobalViewerCID";
import { dispatchCustomEvent } from "~/common/custom-events";
import { Alert, UploadingAlert } from "~/components/core/Alert";

const cookies = new Cookies();

const SIDEBARS = {
  SIDEBAR_FILECOIN_ARCHIVE: <SidebarFilecoinArchive />,
  SIDEBAR_FILE_STORAGE_DEAL: <SidebarFileStorageDeal />,
  SIDEBAR_WALLET_SEND_FUNDS: <SidebarWalletSendFunds />,
  SIDEBAR_CREATE_WALLET_ADDRESS: <SidebarCreateWalletAddress />,
  SIDEBAR_ADD_FILE_TO_BUCKET: <SidebarAddFileToBucket />,
  SIDEBAR_ADD_FILE_TO_SLATE: <SidebarAddFileToSlate />,
  SIDEBAR_CREATE_SLATE: <SidebarCreateSlate />,
  SIDEBAR_DRAG_DROP_NOTICE: <SidebarDragDropNotice />,
  SIDEBAR_SINGLE_SLATE_SETTINGS: <SidebarSingleSlateSettings />,
  SIDEBAR_HELP: <SidebarHelp />,
};

const SCENES = {
  HOME: <SceneHome />,
  DIRECTORY: <SceneDirectory />,
  PUBLIC_PROFILE: <ScenePublicProfile />,
  PROFILE: <SceneProfile />,
  WALLET: <SceneWallet />,
  FOLDER: <SceneFilesFolder />,
  FILE: <SceneFile />,
  PUBLIC_SLATE: <ScenePublicSlate />,
  SLATE: <SceneSlate />,
  DEALS: <SceneDeals />,
  SETTINGS: <SceneSettings />,
  SETTINGS_DEVELOPER: <SceneSettingsDeveloper />,
  EDIT_ACCOUNT: <SceneEditAccount />,
  SLATES: <SceneSlates />,
  LOCAL_DATA: <SceneLocalData />,
  NETWORK: <SceneSentinel />,
  DIRECTORY: <SceneDirectory />,
  FILECOIN: <SceneArchive />,
  MAKE_DEAL: <SceneMakeFilecoinDeal />,
  ENCRYPTED: <SceneEncryptedData />,
  MINERS: <SceneMiners />,
};

export default class ApplicationPage extends React.Component {
  _body;

  state = {
    selected: {},
    viewer: this.props.viewer,
    history: [{ id: "V1_NAVIGATION_HOME", scrollTop: 0, data: null }],
    currentIndex: 0,
    data: null,
    sidebar: null,
    sidebarLoading: false,
    online: null,
    sidebar: null,
  };

  async componentDidMount() {
    window.addEventListener("dragenter", this._handleDragEnter);
    window.addEventListener("dragleave", this._handleDragLeave);
    window.addEventListener("dragover", this._handleDragOver);
    window.addEventListener("drop", this._handleDrop);
    window.addEventListener("online", this._handleOnlineStatus);
    window.addEventListener("offline", this._handleOnlineStatus);

    const id = Window.getQueryParameterByName("scene");

    if (!Strings.isEmpty(id) && this.state.viewer) {
      return this._handleNavigateTo({ id });
    }
  }

  componentWillUnmount() {
    window.removeEventListener("dragenter", this._handleDragEnter);
    window.removeEventListener("dragleave", this._handleDragLeave);
    window.removeEventListener("dragover", this._handleDragOver);
    window.removeEventListener("drop", this._handleDrop);
  }

  _handleOnlineStatus = async () => {
    if (navigator.onLine) {
      dispatchCustomEvent({
        name: "create-alert",
        detail: { alert: { message: "Back online!", status: "INFO" } },
      });
    } else {
      dispatchCustomEvent({
        name: "create-alert",
        detail: { alert: { message: "Offline. Trying to reconnect" } },
      });
    }
    this.setState({ online: navigator.onLine });
  };

  _handleDrop = async (e) => {
    this._handleDismissSidebar();
    // NOTE(jim): If this is true, then drag and drop came from a slate object.
    const data = e.dataTransfer.getData("slate-object-drag-data");
    if (data) {
      return;
    }

    e.preventDefault();

    // TODO(jim): Refactor later
    const navigation = NavigationData.generate(this.state.viewer);
    const next = this.state.history[this.state.currentIndex];
    const current = NavigationData.getCurrentById(navigation, next.id);

    let slate = null;
    if (current.target && current.target.slateId) {
      slate = { id: current.target.slateId };
    }

    const files = [];
    let fileLoading = {};
    // let sidebarOpen = false;
    if (e.dataTransfer.items && e.dataTransfer.items.length) {
      for (var i = 0; i < e.dataTransfer.items.length; i++) {
        if (e.dataTransfer.items[i].kind === "file") {
          var file = e.dataTransfer.items[i].getAsFile();

          // if (!sidebarOpen) {
          //   this._handleAction({
          //     type: "SIDEBAR",
          //     value: "SIDEBAR_ADD_FILE_TO_BUCKET",
          //     data: slate,
          //   });
          //   sidebarOpen = true;
          // }

          files.push(file);
          fileLoading[`${file.lastModified}-${file.name}`] = {
            name: file.name,
            loaded: 0,
            total: file.size,
          };
        }
      }
    }

    if (!files.length) {
      dispatchCustomEvent({
        name: "create-alert",
        detail: {
          alert: {
            message: "File type not supported. Please try a different file",
          },
        },
      });
      return;
    }

    // NOTE(jim): Stages each file.
    this._handleRegisterFileLoading({ fileLoading });

    this._handleUpload({ files, slate, keys: Object.keys(fileLoading) });
  };

  _handleUploadFiles = async ({ files, slate }) => {
    let toUpload = [];
    let fileLoading = {};
    let someFailed = false;
    for (let i = 0; i < files.length; i++) {
      let file = files[i];

      if (!file) {
        someFailed = true;
        continue;
      }

      toUpload.push(file);
      fileLoading[`${file.lastModified}-${file.name}`] = {
        name: file.name,
        loaded: 0,
        total: file.size,
      };
    }

    if (!toUpload.length) {
      dispatchCustomEvent({
        name: "create-alert",
        detail: {
          alert: { message: "We could not find any files to upload." },
        },
      });
      return false;
    }

    if (someFailed) {
      dispatchCustomEvent({
        name: "create-alert",
        detail: {
          alert: { message: "Some of your files could not be uploaded" },
        },
      });
    }

    this._handleRegisterFileLoading({ fileLoading });
    this._handleUpload({
      files: toUpload,
      slate,
      keys: Object.keys(fileLoading),
    });
  };

  _handleUpload = async ({ files, slate, keys }) => {
    if (!files || !files.length) {
      return null;
    }

    // TODO(jim+carson+martina): temporary workaround before we are ready
    // to allow parallel downloads again.
    const resolvedFiles = [];
    for (let i = 0; i < files.length; i++) {
      const response = await FileUtilities.upload({
        file: files[i],
        context: this,
      });

      resolvedFiles.push(response);
    }

    let responses = await Promise.allSettled(resolvedFiles);

    let succeeded = responses
      .filter((res) => {
        return res.status === "fulfilled" && res.value && !res.value.error;
      })
      .map((res) => res.value);
    if (slate && slate.id) {
      await FileUtilities.uploadToSlate({ responses: succeeded, slate });
    }

    let processResponse = await Actions.processPendingFiles();
    if (!processResponse) {
      dispatchCustomEvent({
        name: "create-alert",
        detail: {
          alert: {
            message:
              "We encountered issues updating your uploaded files. Please try again",
          },
        },
      });
      return;
    }

    if (processResponse.error) {
      dispatchCustomEvent({
        name: "create-alert",
        detail: {
          alert: {
            decorator: processResponse.decorator,
          },
        },
      });
      return;
    }

    await this.rehydrate({ resetFiles: true });

    //NOTE(martina): to update the carousel to include the new file if you're on the data view page
    dispatchCustomEvent({
      name: "remote-update-carousel",
      detail: {},
    });

    //NOTE(martina): to update the slate to include the new file if you're on a slate page
    const navigation = NavigationData.generate(this.state.viewer);
    const next = this.state.history[this.state.currentIndex];
    const current = NavigationData.getCurrentById(navigation, next.id);
    if (
      current.target &&
      current.target.slateId &&
      this.state.viewer.slates
        .map((slate) => slate.id)
        .includes(current.target.slateId)
    ) {
      dispatchCustomEvent({
        name: "remote-update-slate-screen",
        detail: {},
      });
    }

    if (!slate) {
      const { added, skipped } = processResponse.data;
      let message = `${added || 0} file${added !== 1 ? "s" : ""} uploaded. `;
      if (skipped) {
        message += `${skipped || 0} duplicate / existing file${
          added !== 1 ? "s were" : " was"
        } skipped.`;
      }
      dispatchCustomEvent({
        name: "create-alert",
        detail: {
          alert: { message, status: !added ? null : "INFO" },
        },
      });
    }

    this._handleRegisterLoadingFinished({ keys });

    return null;
  };

  _handleRegisterFileLoading = ({ fileLoading }) => {
    if (this.state.fileLoading) {
      return this.setState({
        fileLoading: { ...this.state.fileLoading, ...fileLoading },
      });
    }
    return this.setState({
      fileLoading,
    });
  };

  _handleRegisterLoadingFinished = ({ keys }) => {
    let fileLoading = this.state.fileLoading;
    for (let key of keys) {
      delete fileLoading[key];
    }
    this.setState({ fileLoading });
  };

  _handleDragEnter = (e) => {
    e.preventDefault();
    if (this.state.sidebar) {
      return;
    }

    // NOTE(jim): Only allow the sidebar to show with file drag and drop.
    if (
      e.dataTransfer.items &&
      e.dataTransfer.items.length &&
      e.dataTransfer.items[0].kind !== "file"
    ) {
      return;
    }

    this._handleAction({
      type: "SIDEBAR",
      value: "SIDEBAR_DRAG_DROP_NOTICE",
    });
  };

  _handleDragLeave = (e) => {
    e.preventDefault();
  };

  _handleDragOver = (e) => {
    e.preventDefault();
  };

  _handleSidebarLoading = (sidebarLoading) => this.setState({ sidebarLoading });

  rehydrate = async (options) => {
    const response = await Actions.hydrateAuthenticatedUser();

    if (!response || response.error) {
      dispatchCustomEvent({
        name: "create-alert",
        detail: {
          alert: {
            message: "We encountered issues while refreshing. Please try again",
          },
        },
      });
      return null;
    }

    console.log("REHYDRATION CALL", response);

    const updates = {
      viewer: JSON.parse(JSON.stringify(response.data)),
    };

    if (options && options.resetFiles) {
      updates.sidebar = null;
    }

    this.setState(updates);

    return response;
  };

  _handleSubmit = async (data) => {
    let response;

    if (data.type === "CREATE_SLATE") {
      response = await Actions.createSlate({
        name: data.name,
        public: data.public,
        body: data.body,
      });
    }

    if (data.type === "CREATE_WALLET_ADDRESS") {
      response = await Actions.updateViewer({
        type: "CREATE_FILECOIN_ADDRESS",
        address: {
          name: data.name,
          type: data.wallet_type,
          makeDefault: data.makeDefault,
        },
      });
    }

    if (data.type === "SEND_WALLET_ADDRESS_FILECOIN") {
      response = await Actions.sendFilecoin({
        source: data.source,
        target: data.target,
        amount: data.amount,
      });
    }

    await this.rehydrate();

    this._handleDismissSidebar();

    return response;
  };

  _handleDeleteYourself = async () => {
    // TODO(jim): Put this somewhere better for messages.
    const message =
      "Do you really want to delete your account? It will be permanently removed";
    if (!window.confirm(message)) {
      return false;
    }

    let response = await Actions.deleteViewer();

    if (!response || response.error) {
      dispatchCustomEvent({
        name: "create-alert",
        detail: {
          alert: {
            message:
              "We're having trouble connecting right now. Please try again later",
          },
        },
      });
      return response;
    }

    await this._handleSignOut();

    return response;
  };

  _handleCreateUser = async (state) => {
    // NOTE(jim): Acts as our existing username exists check.
    // If the user exists, move on the sign in anyways.
    let response = await Actions.createUser(state);
    console.log("CREATE_USER", response);

    if (!response || response.error) {
      return response;
    }

    return this._handleAuthenticate(state);
  };

  _handleAuthenticate = async (state) => {
    // NOTE(jim): Kills existing session cookie if there is one.
    const jwt = cookies.get(Credentials.session.key);

    if (jwt) {
      cookies.remove(Credentials.session.key);
    }

    let response = await Actions.signIn(state);
    if (!response || response.error) {
      return response;
    }

    if (response.token) {
      // NOTE(jim):
      // + One week.
      // + Only requests to the same site.
      // + Not using sessionStorage so the cookie doesn't leave when the browser dies.
      cookies.set(Credentials.session.key, response.token, true, {
        path: "/",
        maxAge: 3600 * 24 * 7,
        sameSite: "strict",
      });
    }

    await this.rehydrate();
    return response;
  };

  _handleSignOut = () => {
    const jwt = cookies.get(Credentials.session.key);

    if (jwt) {
      cookies.remove(Credentials.session.key);
      window.location.reload();
    }
  };

  _handleViewerChange = (e) => {
    this.setState({
      viewer: { ...this.state.viewer, [e.target.name]: e.target.value },
    });
  };

  _handleSelectedChange = (e) => {
    this.setState({
      selected: { ...this.state.selected, [e.target.name]: e.target.value },
    });
  };

  _handleDismissSidebar = () => {
    this.setState({ sidebar: null, sidebarLoading: false, sidebarData: null });
  };

  _handleAction = (options) => {
    if (options.type === "NAVIGATE") {
      // NOTE(martina): The `scene` property is only necessary when you need to display a component different from the one corresponding to the tab it appears in
      // + e.g. to display <SceneProfile/> while on the Home tab
      // + `scene` should be the decorator of the component you want displayed
      return this._handleNavigateTo(
        { id: options.value, scene: options.scene },
        options.data
      );
    }

    if (options.type === "NEW_WINDOW") {
      return window.open(options.value);
    }

    if (options.type === "ACTION") {
      dispatchCustomEvent({
        name: "create-alert",
        detail: { alert: { message: JSON.stringify(options), status: "INFO" } },
      });
    }

    if (options.type === "DOWNLOAD") {
      dispatchCustomEvent({
        name: "create-alert",
        detail: { alert: { message: JSON.stringify(options), status: "INFO" } },
      });
    }

    if (options.type === "SIDEBAR") {
      return this.setState({
        sidebar: SIDEBARS[options.value],
        sidebarData: options.data,
      });
    }

    return alert(JSON.stringify(options));
  };

  _handleNavigateTo = (next, data = null) => {
    window.history.replaceState({ ...next }, "Slate", `?scene=${next.id}`);

    let body = document.documentElement || document.body;
    this.state.history[this.state.currentIndex].scrollTop = body.scrollTop;
    this.state.history[this.state.currentIndex].data = this.state.data;

    if (this.state.currentIndex !== this.state.history.length - 1) {
      const adjustedArray = [...this.state.history];
      adjustedArray.length = this.state.currentIndex + 1;

      return this.setState(
        {
          history: [...adjustedArray, next],
          currentIndex: this.state.currentIndex + 1,
          data,
          sidebar: null,
        },
        () => body.scrollTo(0, 0)
      );
    }

    this.setState(
      {
        history: [...this.state.history, next],
        currentIndex: this.state.currentIndex + 1,
        data,
        sidebar: null,
      },
      () => body.scrollTo(0, 0)
    );
  };

  _handleBack = () => {
    let body = document.documentElement || document.body;
    this.state.history[this.state.currentIndex].scrollTop = body.scrollTop;
    this.state.history[this.state.currentIndex].data = this.state.data;

    const next = this.state.history[this.state.currentIndex - 1];
    window.history.replaceState({ ...next }, "Slate", `?scene=${next.id}`);

    this.setState(
      {
        currentIndex: this.state.currentIndex - 1,
        sidebar: null,
        data: { ...next.data },
      },
      () => {
        console.log({ next });
        body.scrollTo(0, next.scrollTop);
      }
    );
  };

  _handleForward = () => {
    let body = document.documentElement || document.body;
    this.state.history[this.state.currentIndex].scrollTop = body.scrollTop;
    const next = this.state.history[this.state.currentIndex + 1];

    window.history.replaceState({ ...next }, "Slate", `?scene=${next.id}`);

    this.setState(
      {
        currentIndex: this.state.currentIndex + 1,
        sidebar: null,
        data: { ...next.data },
      },
      () => {
        console.log({ next });
        body.scrollTo(0, next.scrollTop);
      }
    );
  };

  render() {
    // NOTE(jim): Not authenticated.
    if (!this.state.viewer) {
      return (
        <WebsitePrototypeWrapper
          title="Slate: sign in"
          description="Sign in to your Slate account to manage your assets."
          url="https://slate.host/_"
        >
          <Alert noWarning style={{ top: 0, width: "100%" }} />
          <SceneSignIn
            onCreateUser={this._handleCreateUser}
            onAuthenticate={this._handleAuthenticate}
            onAction={this._handleAction}
          />
        </WebsitePrototypeWrapper>
      );
    }

    // NOTE(jim): Authenticated.
    const navigation = NavigationData.generate(this.state.viewer);
    const next = this.state.history[this.state.currentIndex];
    const current = NavigationData.getCurrentById(navigation, next.id);

    const navigationElement = (
      <ApplicationNavigation
        viewer={this.state.viewer}
        activeId={current.target.id}
        activeIds={current.activeIds}
        navigation={navigation}
        onAction={this._handleAction}
        onSignOut={this._handleSignOut}
      />
    );

    let headerElement = (
      <ApplicationHeader
        viewer={this.state.viewer}
        pageTitle={current.target.pageTitle}
        currentIndex={this.state.currentIndex}
        history={this.state.history}
        onAction={this._handleAction}
        onRehydrate={this.rehydrate}
        onBack={this._handleBack}
        onForward={this._handleForward}
        onSignOut={this._handleSignOut}
      />
    );

    const scene = React.cloneElement(
      SCENES[next.scene || current.target.decorator],
      {
        current: current.target,
        data: this.state.data,
        viewer: this.state.viewer,
        selected: this.state.selected,
        onSelectedChange: this._handleSelectedChange,
        onViewerChange: this._handleViewerChange,
        onDeleteYourself: this._handleDeleteYourself,
        onAction: this._handleAction,
        onUpload: this._handleUploadFiles,
        onBack: this._handleBack,
        onForward: this._handleForward,
        onRehydrate: this.rehydrate,
        sceneId: current.target.id,
      }
    );

    let sidebarElement;
    if (this.state.sidebar) {
      sidebarElement = React.cloneElement(this.state.sidebar, {
        current: current.target,
        selected: this.state.selected,
        viewer: this.state.viewer,
        data: this.state.data,
        sidebarData: this.state.sidebarData,
        fileLoading: this.state.fileLoading,
        sidebarLoading: this.state.sidebarLoading,
        onSelectedChange: this._handleSelectedChange,
        onSubmit: this._handleSubmit,
        onCancel: this._handleDismissSidebar,
        onRegisterFileLoading: this._handleRegisterFileLoading,
        onUpload: this._handleUploadFiles,
        onSidebarLoading: this._handleSidebarLoading,
        onAction: this._handleAction,
        onRehydrate: this.rehydrate,
      });
    }

    const title = `Slate : ${current.target.pageTitle}`;
    const description = "";
    const url = "https://slate.host/_";

    return (
      <React.Fragment>
        <WebsitePrototypeWrapper
          description={description}
          title={title}
          url={url}
        >
          <ApplicationLayout
            onAction={this._handleAction}
            header={headerElement}
            navigation={navigationElement}
            sidebar={sidebarElement}
            onDismissSidebar={this._handleDismissSidebar}
            fileLoading={this.state.fileLoading}
            filecoin={current.target.filecoin}
          >
            {scene}
          </ApplicationLayout>
          <GlobalViewerCID
            onRehydrate={this.rehydrate}
            onAction={this._handleAction}
          />
          <System.GlobalCarousel />
          <System.GlobalModal />
        </WebsitePrototypeWrapper>
      </React.Fragment>
    );
  }
}