import * as React from "react";
import * as Constants from "~/common/constants";
import * as Validations from "~/common/validations";
import * as Window from "~/common/window";
import * as SVG from "~/common/svg";
import * as Actions from "~/common/actions";
import * as Events from "~/common/custom-events";

import { GlobalCarousel } from "~/components/system/components/GlobalCarousel";
import { css } from "@emotion/react";
import { TabGroup, PrimaryTabGroup, SecondaryTabGroup } from "~/components/core/TabGroup";
import { LoaderSpinner } from "~/components/system/components/Loaders";
import { Link } from "~/components/core/Link";

import EmptyState from "~/components/core/EmptyState";
import ScenePage from "~/components/core/ScenePage";
import SlateMediaObjectPreview from "~/components/core/SlateMediaObjectPreview";
import WebsitePrototypeWrapper from "~/components/core/WebsitePrototypeWrapper";

const STYLES_LOADER = css`
  display: flex;
  align-items: center;
  justify-content: center;
  height: calc(100vh - 400px);
  width: 100%;
`;

const STYLES_IMAGE_BOX = css`
  cursor: pointer;
  position: relative;
  box-shadow: ${Constants.shadow.lightSmall};
  margin: 10px;

  :hover {
    box-shadow: ${Constants.shadow.lightMedium};
  }

  @media (max-width: ${Constants.sizes.mobile}px) {
    overflow: hidden;
    border-radius: 8px;
  }
`;

const STYLES_TEXT_AREA = css`
  position: absolute;
  top: 16px;
  left: 0px;
`;

const STYLES_TITLE = css`
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: ${Constants.system.white};
  font-family: ${Constants.font.medium};
  margin-bottom: 4px;
  width: calc(100% - 32px);
  padding: 0px 16px;
  box-sizing: content-box;
`;

const STYLES_SECONDARY = css`
  ${STYLES_TITLE}
  font-size: ${Constants.typescale.lvlN1};
  width: 100%;
`;

const STYLES_GRADIENT = css`
  background: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.3) 0%,
    rgba(0, 0, 0, 0.2) 26.56%,
    rgba(0, 0, 0, 0) 100%
  );
  backdrop-filter: blur(2px);
  width: 100%;
  height: 72px;
  position: absolute;
  top: 0px;
  left: 0px;

  @media (max-width: ${Constants.sizes.mobile}px) {
    overflow: hidden;
    border-radius: 0px 0px 8px 8px;
  }
`;

const STYLES_ACTIVITY_GRID = css`
  margin: -10px;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;

  @media (max-width: ${Constants.sizes.mobile}px) {
    margin-top: 24px;
  }
`;

class ActivitySquare extends React.Component {
  state = {
    showText: false,
  };

  render() {
    const item = this.props.item;
    const size = this.props.size;
    // const isImage =
    //   Validations.isPreviewableImage(item.file.data.type) || !!item.file.data.coverImage;
    return (
      <div
        css={STYLES_IMAGE_BOX}
        style={{ width: size, height: size }}
        onMouseEnter={() => this.setState({ showText: true })}
        onMouseLeave={() => this.setState({ showText: false })}
      >
        <SlateMediaObjectPreview
          file={item.file}
          centeredImage
          // iconOnly
          style={{ border: "none" }}
          imageStyle={{ border: "none" }}
        />
      </div>
    );
  }
}

// {this.state.showText || this.props.isMobile ? <div css={STYLES_GRADIENT} /> : null}
//         {this.state.showText || this.props.isMobile ? (
//           <div css={STYLES_TEXT_AREA} style={{ width: this.props.size }}>
//             <span
//               style={{
//                 color: Constants.system.white,
//                 padding: "8px 16px",
//               }}
//               css={STYLES_SECONDARY}
//             >
//               <SVG.ArrowDownLeft
//                 height="10px"
//                 style={{ transform: "scaleX(-1)", marginRight: 4 }}
//               />
//               {item.slate.data.name || item.slate.slatename}
//             </span>
//           </div>
//         ) : null}

const ActivityRectangle = ({ item, width, height }) => {
  let file;
  for (let obj of item.slate?.objects || []) {
    if (Validations.isPreviewableImage(obj.type) || obj.coverImage) {
      file = obj;
    }
  }
  let numObjects = item.slate?.objects?.length || 0;
  return (
    <div css={STYLES_IMAGE_BOX} style={{ width, height }}>
      {file ? (
        <SlateMediaObjectPreview
          file={file}
          centeredImage
          iconOnly
          style={{ border: "none" }}
          imageStyle={{ border: "none" }}
        />
      ) : null}
      <div css={STYLES_GRADIENT} />
      <div css={STYLES_TEXT_AREA}>
        <div
          css={STYLES_TITLE}
          style={{
            fontFamily: Constants.font.semiBold,
            width,
          }}
        >
          {item.slate.data.name || item.slate.slatename}
        </div>
        <div
          css={STYLES_SECONDARY}
          style={{
            color: Constants.semantic.textGrayLight,
            width,
          }}
        >
          {numObjects} File{numObjects == 1 ? "" : "s"}
        </div>
      </div>
    </div>
  );
};

export default class SceneActivity extends React.Component {
  counter = 0;
  state = {
    imageSize: 200,
    loading: false,
    carouselIndex: -1,
  };

  async componentDidMount() {
    this.fetchActivityItems(true);
    this.calculateWidth();
    this.debounceInstance = Window.debounce(this.calculateWidth, 200);
    this.scrollDebounceInstance = Window.debounce(this._handleScroll, 200);
    window.addEventListener("resize", this.debounceInstance);
    window.addEventListener("scroll", this.scrollDebounceInstance);
  }

  componentDidUpdate(prevProps) {
    if (prevProps.page.params?.tab !== this.props.page.params?.tab) {
      this.fetchActivityItems(true);
    }
  }

  componentWillUnmount() {
    window.removeEventListener("resize", this.debounceInstance);
    window.removeEventListener("scroll", this.scrollDebounceInstance);
  }

  getTab = () => {
    if (this.props.page.params?.tab) {
      return this.props.page.params?.tab;
    }
    if (this.props.viewer?.subscriptions?.length || this.props.viewer?.following?.length) {
      return "activity";
    }
    return "explore";
  };

  _handleScroll = (e) => {
    if (this.state.loading) {
      return;
    }
    const windowHeight =
      "innerHeight" in window ? window.innerHeight : document.documentElement.offsetHeight;
    const body = document.body;
    const html = document.documentElement;
    const docHeight = Math.max(
      body.scrollHeight,
      body.offsetHeight,
      html.clientHeight,
      html.scrollHeight,
      html.offsetHeight
    );
    const windowBottom = windowHeight + window.pageYOffset;
    if (windowBottom >= docHeight - 600) {
      this.fetchActivityItems();
    }
  };

  fetchActivityItems = async (update = false) => {
    if (this.state.loading === "loading") return;
    let tab = this.getTab();
    const isExplore = tab === "explore";
    this.setState({ loading: "loading" });
    let activity;
    if (this.props.viewer) {
      activity = isExplore ? this.props.viewer?.explore || [] : this.props.viewer?.activity || [];
    } else {
      activity = this.state.explore || [];
    }
    let requestObject = {};
    if (activity.length) {
      if (update) {
        requestObject.latestTimestamp = activity[0].createdAt;
      } else {
        requestObject.earliestTimestamp = activity[activity.length - 1].createdAt;
      }
    }

    let response;
    if (isExplore) {
      response = await Actions.getExplore(requestObject);
    } else {
      requestObject.following = this.props.viewer.following.map((item) => item.id);
      requestObject.subscriptions = this.props.viewer.subscriptions.map((item) => item.id);

      response = await Actions.getActivity(requestObject);
    }
    if (Events.hasError(response)) {
      this.setState({ loading: false });
      return;
    }

    let newItems = response.data || [];

    if (update) {
      activity.unshift(...newItems);
      this.counter = 0;
      activity = this.formatActivity(activity);
    } else {
      newItems = this.formatActivity(newItems);
      activity.push(...newItems);
    }

    if (this.props.viewer) {
      if (!isExplore) {
        this.props.onAction({ type: "UPDATE_VIEWER", viewer: { activity: activity } });
      } else {
        this.props.onAction({ type: "UPDATE_VIEWER", viewer: { explore: activity } });
      }
      this.setState({ loading: false });
    } else {
      this.setState({ explore: activity, loading: false });
    }
  };

  formatActivity = (userActivity) => {
    let activity = [];
    for (let item of userActivity) {
      // if (item.slate && !item.slate.isPublic) {
      //   continue;
      // }
      if (item.type === "CREATE_SLATE_OBJECT") {
        //&& item.slate && item.file
        activity.push(item);
      } else if (item.type === "CREATE_SLATE" && item.slate) {
        activity.push(item);
      }
    }
    return activity; //NOTE(martina): because now it's only things of CREATE_SLATE_OBJECT type, so all square and don't need reordering
    //NOTE(martina): rearrange order to always get an even row of 6 squares
    //TODO(martina): improve this. will fail if there are no more squares left to "swap" with at the end, and you'll end up wtih an empty space
    // let activity = userActivity || [];
    // for (let i = 0; i < activity.length; i++) {
    //   let item = activity[i];
    //   if (item.type === "CREATE_SLATE") {
    //     this.counter += 2;
    //   } else if (item.type === "CREATE_SLATE_OBJECT") {
    //     this.counter += 1;
    //   }
    //   if (this.counter === 6) {
    //     this.counter = 0;
    //   } else if (this.counter > 6) {
    //     let j = i - 1;
    //     while (activity[j].type !== "CREATE_SLATE_OBJECT") {
    //       j -= 1;
    //     }
    //     let temp = activity[j];
    //     activity[j] = activity[i];
    //     activity[i] = temp;
    //     this.counter = 0;
    //     i -= 1;
    //   }
    // }
    // return activity;
  };

  calculateWidth = () => {
    let windowWidth = window.innerWidth;
    let imageSize;
    if (windowWidth < Constants.sizes.mobile) {
      imageSize = windowWidth - 2 * 24; //(windowWidth - 2 * 24 - 20) / 2;
    } else {
      imageSize = (windowWidth - 2 * 56 - 5 * 20) / 6;
    }
    this.setState({ imageSize });
  };

  getItemIndexById = (items, item) => {
    const id = item.file?.id;
    return items.findIndex((i) => i.id === id);
  };

  render() {
    let tab = this.getTab();
    let activity;

    if (this.props.viewer) {
      activity =
        tab === "activity" ? this.props.viewer?.activity || [] : this.props.viewer?.explore || [];
    } else {
      activity = this.state.explore || [];
    }

    let items = activity
      .filter((item) => item.type === "CREATE_SLATE_OBJECT")
      .map((item) => {
        return {
          ...item.file,
          slateId: item.slateId,
          // slate: item.slate,
          // owner: item.owner?.username,
        };
      });

    return (
      <WebsitePrototypeWrapper
        title={`${this.props.page.pageTitle} • Slate`}
        url={`${Constants.hostname}${this.props.page.pathname}`}
      >
        <ScenePage>
          {this.props.viewer && (
            <SecondaryTabGroup
              tabs={[
                { title: "My network", value: { tab: "activity" } },
                { title: "Explore", value: { tab: "explore" } },
              ]}
              value={tab}
              onAction={this.props.onAction}
              style={{ marginTop: 0 }}
            />
          )}
          <GlobalCarousel
            carouselType="ACTIVITY"
            viewer={this.props.viewer}
            objects={items}
            onAction={this.props.onAction}
            index={this.state.carouselIndex}
            onChange={(index) => {
              if (index >= items.length - 4) {
                this.fetchActivityItems();
              }
              this.setState({ carouselIndex: index });
            }}
            isMobile={this.props.isMobile}
            // params={this.props.page.params}
            isOwner={false}
          />
          {activity.length ? (
            <div>
              <div css={STYLES_ACTIVITY_GRID}>
                {activity.map((item, i) => {
                  if (item.type === "CREATE_SLATE") {
                    return (
                      <Link
                        redirect
                        key={i}
                        disabled={this.props.isMobile ? false : true}
                        // params={
                        //   this.props.isMobile
                        //     ? null
                        //     : { ...this.props.page.params, cid: item.file.cid }
                        // }
                        href={`/$/slate/${item.slateId}`}
                        onAction={this.props.onAction}
                        onClick={() => this.setState({ carouselIndex: i })}
                      >
                        {/* <span
                      key={item.id}
                      onClick={() =>
                        this.props.onAction({
                          type: "NAVIGATE",
                          value: "NAV_SLATE",
                          data: item.slate,
                        })
                      }
                    > */}
                        <ActivityRectangle
                          width={
                            this.props.isMobile
                              ? this.state.imageSize
                              : this.state.imageSize * 2 + 20
                          }
                          height={this.state.imageSize}
                          item={item}
                        />
                        {/* </span> */}
                      </Link>
                    );
                  } else if (item.type === "CREATE_SLATE_OBJECT") {
                    return (
                      <Link
                        redirect
                        key={i}
                        disabled={this.props.isMobile ? false : true}
                        // params={
                        //   this.props.isMobile
                        //     ? null
                        //     : { ...this.props.page.params, cid: item.file.cid }
                        // }
                        href={`/$/slate/${item.slateId}?cid=${item.file.cid}`}
                        onAction={this.props.onAction}
                        onClick={() => this.setState({ carouselIndex: i })}
                        // onClick={
                        //   this.props.isMobile
                        //     ? () => {}
                        //     : () =>
                        //         Events.dispatchCustomEvent({
                        //           name: "slate-global-open-carousel",
                        //           detail: { index: this.getItemIndexById(items, item) },
                        //         })
                        // }
                      >
                        <ActivitySquare
                          size={this.state.imageSize}
                          item={item}
                          isMobile={this.props.isMobile}
                          onAction={this.props.onAction}
                        />
                      </Link>
                    );
                  } else {
                    return null;
                  }
                })}
              </div>
              <div css={STYLES_LOADER} style={{ height: 100 }}>
                {this.state.loading === "loading" ? (
                  <LoaderSpinner style={{ height: 32, width: 32 }} />
                ) : null}
              </div>
            </div>
          ) : this.state.loading === "loading" ? (
            <div css={STYLES_LOADER}>
              <LoaderSpinner style={{ height: 32, width: 32 }} />
            </div>
          ) : (
            <EmptyState>
              <SVG.Users height="24px" />
              <div style={{ marginTop: 24 }}>
                Start following people and collections to see their activity here
              </div>
            </EmptyState>
          )}
        </ScenePage>
      </WebsitePrototypeWrapper>
    );
  }
}