import * as React from "react";
import * as Constants from "~/common/constants";
import * as Strings from "~/common/strings";
import * as System from "~/components/system";
import * as SVG from "~/common/svg";
import * as Window from "~/common/window";
import * as UserBehaviors from "~/common/user-behaviors";
import * as Events from "~/common/custom-events";

import { css } from "@emotion/react";
import { Boundary } from "~/components/system/components/fragments/Boundary";
import { PopoverNavigation } from "~/components/system/components/PopoverNavigation";
import { LoaderSpinner } from "~/components/system/components/Loaders";
import { CheckBox } from "~/components/system/components/CheckBox";
import { Table } from "~/components/core/Table";
import { FileTypeIcon } from "~/components/core/FileTypeIcon";
import { ButtonPrimary, ButtonWarning } from "~/components/system/components/Buttons";
import { GroupSelectable, Selectable } from "~/components/core/Selectable/";

import SlateMediaObjectPreview from "~/components/core/SlateMediaObjectPreview";
import FilePreviewBubble from "~/components/core/FilePreviewBubble";

const STYLES_CONTAINER_HOVER = css`
  display: flex;

  :hover {
    color: ${Constants.system.brand};
  }
`;

const STYLES_ICON_BOX = css`
  height: 32px;
  width: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  margin-left: 16px;
`;

const STYLES_CANCEL_BOX = css`
  height: 16px;
  width: 16px;
  background-color: ${Constants.system.brand};
  border-radius: 3px;
  position: relative;
  right: 3px;
  cursor: pointer;
  box-shadow: 0 0 0 1px ${Constants.system.brand};
`;

const STYLES_HEADER_LINE = css`
  display: flex;
  align-items: center;
  margin-top: 80px;
  margin-bottom: 30px;
`;

const STYLES_LINK = css`
  display: inline;
  cursor: pointer;
  transition: 200ms ease all;
  font-size: 0.9rem;
  padding: 12px 0px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 320px;

  @media (max-width: ${Constants.sizes.tablet}px) {
    max-width: 120px;
  }
`;

const STYLES_VALUE = css`
  font-size: 0.9rem;
  padding: 12px 0px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
`;

const STYLES_ICON_BOX_HOVER = css`
  display: inline-flex;
  align-items: center;
  padding: 8px;
  cursor: pointer;

  :hover {
    color: ${Constants.system.brand};
  }
`;

const STYLES_ICON_BOX_BACKGROUND = css`
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 25px;
  width: 25px;
  cursor: pointer;
  background-color: rgba(255, 255, 255, 0.75);
  border-radius: 3px;
  position: absolute;
  bottom: 8px;
  right: 8px;
`;

const STYLES_ACTION_BAR = css`
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-radius: 4px;
  padding: 0px 32px;
  box-sizing: border-box;
  background-color: ${Constants.system.textGrayDark};
  width: 90vw;
  max-width: 878px;
  height: 48px;

  @media (max-width: ${Constants.sizes.mobile}px) {
    display: none;
  }
`;

const STYLES_ACTION_BAR_CONTAINER = css`
  position: fixed;
  bottom: 12px;
  left: 0px;
  width: 100vw;
  display: flex;
  justify-content: center;
  z-index: ${Constants.zindex.header};

  @media (max-width: ${Constants.sizes.mobile}px) {
    display: none;
  }
`;

const STYLES_RIGHT = css`
  flex-shrink: 0;
  display: flex;
  align-items: center;
`;

const STYLES_LEFT = css`
  width: 100%;
  min-width: 10%;
  display: flex;
  align-items: center;
`;

const STYLES_FILES_SELECTED = css`
  font-family: ${Constants.font.semiBold};
  color: ${Constants.system.white};

  @media (max-width: ${Constants.sizes.mobile}px) {
    display: none;
  }
`;

const STYLES_COPY_INPUT = css`
  pointer-events: none;
  position: absolute;
  opacity: 0;
`;

const STYLES_IMAGE_GRID = css`
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-column-gap: 20px;
  grid-row-gap: 20px;
  width: 100%;

  @media (max-width: ${Constants.sizes.mobile}px) {
    grid-template-columns: repeat(2, 1fr);
  }
`;

const STYLES_IMAGE_BOX = css`
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;

  @media (max-width: ${Constants.sizes.mobile}px) {
    margin: 12px auto;
  }

  :hover {
    box-shadow: 0px 0px 0px 1px ${Constants.system.lightBorder} inset,
      0 0 40px 0 ${Constants.system.shadow};
  }
`;

const STYLES_MOBILE_HIDDEN = css`
  @media (max-width: ${Constants.sizes.mobile}px) {
    display: none;
  }
`;

export default class DataView extends React.Component {
  _mounted = false;

  state = {
    menu: null,
    checked: {},
    viewLimit: 40,
    scrollDebounce: false,
    imageSize: 100,
  };

  isShiftDown = false;
  lastSelectedItemIndex = null;

  gridWrapperEl = React.createRef();

  async componentDidMount() {
    this.calculateWidth();
    this.debounceInstance = Window.debounce(this.calculateWidth, 200);
    if (!this._mounted) {
      this._mounted = true;
      window.addEventListener("scroll", this._handleCheckScroll);
      window.addEventListener("resize", this.debounceInstance);
      window.addEventListener("keydown", this._handleKeyDown);
      window.addEventListener("keyup", this._handleKeyUp);

      if (this.gridWrapperEl.current) {
        this.gridWrapperEl.current.addEventListener("selectstart", this._handleSelectStart);
      }
    }
  }

  componentWillUnmount() {
    this._mounted = false;
    window.removeEventListener("scroll", this._handleCheckScroll);
    window.removeEventListener("resize", this.debounceInstance);
    window.removeEventListener("keydown", this._handleKeyDown);
    window.removeEventListener("keyup", this._handleKeyUp);

    if (this.gridWrapperEl.current) {
      this.gridWrapperEl.current.removeEventListener("selectstart", this._handleSelectStart);
    }
  }

  calculateWidth = () => {
    let windowWidth = window.innerWidth;
    let imageSize;
    if (windowWidth < Constants.sizes.mobile) {
      imageSize = (windowWidth - 2 * 24 - 20) / 2;
    } else {
      imageSize = (windowWidth - 2 * 56 - 4 * 20) / 5;
    }
    this.setState({ imageSize });
  };

  _handleScroll = (e) => {
    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.setState({ viewLimit: this.state.viewLimit + 30 });
    }
  };

  _handleCheckScroll = Window.debounce(this._handleScroll, 200);

  /* NOTE(daniel): This disable text selection while pressing shift key */
  _handleSelectStart = (e) => {
    if (this.isShiftDown) {
      e.preventDefault();
    }
  };

  _addSelectedItemsOnDrag = (e) => {
    let selectedItems = {};
    for (const i of e) {
      selectedItems[i] = true;
    }
    this.setState({ checked: { ...this.state.checked, ...selectedItems } });
  };

  _removeSelectedItemsOnDrag = (e) => {
    const selectedItems = { ...this.state.checked };
    for (const i in selectedItems) {
      selectedItems[i] = selectedItems[i] && !e.includes(+i);
      if (!selectedItems[i]) delete selectedItems[i];
    }
    this.setState({ checked: selectedItems, ...selectedItems });
  };

  _handleDragAndSelect = (e, { isAltDown }) => {
    if (isAltDown) {
      this._removeSelectedItemsOnDrag(e);
      return;
    }
    this._addSelectedItemsOnDrag(e);
  };

  _handleKeyUp = (e) => {
    if (e.keyCode === 16 && this.isShiftDown) {
      this.isShiftDown = false;
    }
  };

  _handleKeyDown = (e) => {
    if (e.keyCode === 16 && !this.isShiftDown) {
      this.isShiftDown = true;
    }

    let numChecked = Object.keys(this.state.checked).length || 0;
    if (e.keyCode === 27 && numChecked) {
      this._handleUncheckAll();
    }
  };

  _handleCheckBox = (e, i) => {
    e.stopPropagation();
    e.preventDefault();

    let checked = this.state.checked;
    if (this.isShiftDown && this.lastSelectedItemIndex !== i) {
      return this._handleShiftClick({
        currentSelectedItemIndex: i,
        lastSelectedItemIndex: this.lastSelectedItemIndex,
        checked,
      });
    }

    if (checked[i]) {
      delete checked[i];
    } else {
      checked[i] = true;
    }
    this.setState({ checked });
    this.lastSelectedItemIndex = i;
  };

  _handleShiftClick = ({ currentSelectedItemIndex, lastSelectedItemIndex, checked }) => {
    const start = Math.min(currentSelectedItemIndex, lastSelectedItemIndex);
    const stop = Math.max(currentSelectedItemIndex, lastSelectedItemIndex) + 1;

    let rangeSelected = {};

    for (let i = start; i < stop; i++) {
      if (checked[currentSelectedItemIndex]) {
        delete checked[i];
      } else {
        rangeSelected[i] = true;
      }
    }

    let newSelection = Object.assign({}, checked, rangeSelected);
    this.setState({ checked: newSelection });
    this.lastSelectedItemIndex = currentSelectedItemIndex;

    return;
  };

  _handleDownloadFiles = async () => {
    const selectedFiles = this.props.items.filter((_, i) => this.state.checked[i]);
    UserBehaviors.compressAndDownloadFiles({
      files: selectedFiles,
      resourceURI: this.props.resources.download,
    });
    this.setState({ checked: {} });
  };

  _handleDelete = (cid, id) => {
    const message = `Are you sure you want to delete these files? They will be deleted from your slates as well`;
    if (!window.confirm(message)) {
      return;
    }

    let cids;
    let ids;
    if (cid) {
      cids = [cid];
      ids = [id];
    } else {
      cids = Object.keys(this.state.checked).map((id) => {
        let index = parseInt(id);
        let item = this.props.viewer.library[0].children[index];
        return item.cid;
      });
      ids = Object.keys(this.state.checked).map((id) => {
        let index = parseInt(id);
        let item = this.props.viewer.library[0].children[index];
        return item.id;
      });
    }

    let library = this.props.viewer.library;
    library[0].children = library[0].children.filter(
      (obj) => !ids.includes(obj.id) && !cids.includes(obj.cid)
    );
    this.props.onUpdateViewer({ library });

    UserBehaviors.deleteFiles(cids, ids);
    this.setState({ checked: {} });
  };

  _handleSelect = (index) => {
    Events.dispatchCustomEvent({
      name: "slate-global-open-carousel",
      detail: { index },
    });
  };

  _handleCheckBoxMouseEnter = (i, isOwner) => {
    isOwner && this.setState({ hover: i });
  };

  _handleCheckBoxMouseLeave = (i, isOwner) => {
    isOwner && this.setState({ hover: null });
  };

  _handleCopy = (e, value) => {
    e.stopPropagation();
    this._handleHide();
    this.setState({ copyValue: value }, () => {
      this._ref.select();
      document.execCommand("copy");
    });
  };

  _handleHide = (e) => {
    this.setState({ menu: null });
  };

  _handleClick = (e) => {
    this.setState({ [e.target.name]: e.target.value });
  };

  _handleAddToSlate = (e) => {
    let userFiles = this.props.viewer.library[0].children;
    let files = Object.keys(this.state.checked).map((index) => userFiles[index]);
    this.props.onAction({
      type: "SIDEBAR",
      value: "SIDEBAR_ADD_FILE_TO_SLATE",
      data: { files },
    });
    this._handleUncheckAll();
  };

  _handleUncheckAll = () => {
    this.setState({ checked: {} });
    this.lastSelectedItemIndex = null;
  };

  /** Note(Amine): These methods will stop collision between 
                   Drag to desktop event and drop to upload
  */
  _stopPropagation = (e) => e.stopPropagation();

  _disableDragAndDropUploadEvent = () => {
    document.addEventListener("dragenter", this._stopPropagation);
    document.addEventListener("drop", this._stopPropagation);
  };

  _enableDragAndDropUploadEvent = () => {
    document.removeEventListener("dragenter", this._stopPropagation);
    document.removeEventListener("drop", this._stopPropagation);
  };

  _handleDragToDesktop = (e, object) => {
    const url = Strings.getCIDGatewayURL(object.cid);
    const title = object.file || object.name;
    const type = object.type;
    console.log(e.dataTransfer, e.dataTransfer.setData);
    e.dataTransfer.setData("DownloadURL", `${type}:${title}:${url}`);
  };

  render() {
    let numChecked = Object.keys(this.state.checked).length || 0;
    let isOwner = this.props.isOwner;
    // const header = (
    //   <div css={STYLES_HEADER_LINE}>
    //     <span css={STYLES_MOBILE_HIDDEN}>
    //       <div
    //         css={STYLES_ICON_BOX}
    //         onClick={() => {
    //           this.setState({ view: "grid", menu: null });
    //         }}
    //       >
    //         <SVG.GridView
    //           style={{
    //             color: this.props.view === 0 ? Constants.system.black : "rgba(0,0,0,0.25)",
    //           }}
    //           height="24px"
    //         />
    //       </div>
    //     </span>
    //     <span css={STYLES_MOBILE_HIDDEN}>
    //       <div
    //         css={STYLES_ICON_BOX}
    //         onClick={() => {
    //           this.setState({ view: "list", menu: null });
    //         }}
    //       >
    //         <SVG.TableView
    //           style={{
    //             color: this.state.view === "list" ? Constants.system.black : "rgba(0,0,0,0.25)",
    //           }}
    //           height="24px"
    //         />
    //       </div>
    //     </span>
    //   </div>
    // );
    const footer = (
      <React.Fragment>
        {numChecked ? (
          <div css={STYLES_ACTION_BAR_CONTAINER}>
            <div css={STYLES_ACTION_BAR}>
              <div css={STYLES_LEFT}>
                <span css={STYLES_FILES_SELECTED}>
                  {numChecked} file{numChecked > 1 ? "s" : ""} selected
                </span>
              </div>
              <div css={STYLES_RIGHT}>
                <ButtonPrimary
                  transparent
                  style={{ color: Constants.system.white }}
                  onClick={this._handleAddToSlate}
                >
                  Add to slate
                </ButtonPrimary>
                <ButtonWarning
                  transparent
                  style={{ marginLeft: 8, color: Constants.system.white }}
                  onClick={() => this._handleDownloadFiles()}
                >
                  {Strings.pluralize("Download file", numChecked)}
                </ButtonWarning>
                <ButtonWarning
                  transparent
                  style={{ marginLeft: 8, color: Constants.system.white }}
                  onClick={() => this._handleDelete()}
                >
                  {Strings.pluralize("Delete file", numChecked)}
                </ButtonWarning>
                <div
                  css={STYLES_ICON_BOX}
                  onClick={() => {
                    this.setState({ checked: {} });
                    this.lastSelectedItemIndex = null;
                  }}
                >
                  <SVG.Dismiss height="20px" style={{ color: Constants.system.darkGray }} />
                </div>
              </div>
            </div>
          </div>
        ) : null}
      </React.Fragment>
    );
    if (this.props.view === 0) {
      return (
        <React.Fragment>
          <GroupSelectable onSelection={this._handleDragAndSelect}>
            <div css={STYLES_IMAGE_GRID} ref={this.gridWrapperEl}>
              {this.props.items.slice(0, this.state.viewLimit).map((each, i) => {
                const cid = each.cid;
                return (
                  <Selectable
                    key={each.id}
                    draggable={!numChecked}
                    onDragStart={(e) => {
                      this._disableDragAndDropUploadEvent();
                      this._handleDragToDesktop(e, each);
                    }}
                    onDragEnd={this._enableDragAndDropUploadEvent}
                    selectableKey={i}
                    css={STYLES_IMAGE_BOX}
                    style={{
                      width: this.state.imageSize,
                      height: this.state.imageSize,
                      boxShadow: numChecked
                        ? `0px 0px 0px 1px ${Constants.system.lightBorder} inset,
      0 0 40px 0 ${Constants.system.shadow}`
                        : "",
                    }}
                    onClick={() => this._handleSelect(i)}
                    onMouseEnter={() => this._handleCheckBoxMouseEnter(i, isOwner)}
                    onMouseLeave={() => this._handleCheckBoxMouseLeave(i, isOwner)}
                  >
                    <SlateMediaObjectPreview
                      blurhash={each.blurhash}
                      url={Strings.getCIDGatewayURL(each.cid)}
                      title={each.name || each.file}
                      type={each.type}
                      coverImage={each.coverImage}
                      dataView={true}
                    />
                    <span css={STYLES_MOBILE_HIDDEN} style={{ pointerEvents: "auto" }}>
                      {numChecked || this.state.hover === i || this.state.menu === each.id ? (
                        <React.Fragment>
                          {/* <div
                            css={STYLES_ICON_BOX_BACKGROUND}
                            onClick={(e) => {
                              e.stopPropagation();
                              this.setState({
                                menu: this.state.menu === each.id ? null : each.id,
                              });
                            }}
                          >
                            <SVG.MoreHorizontal height="24px" />
                            {this.state.menu === each.id ? (
                              <Boundary
                                captureResize={true}
                                captureScroll={false}
                                enabled
                                onOutsideRectEvent={this._handleHide}
                              >
                                {this.props.isOwner ? (
                                  <PopoverNavigation
                                    style={{
                                      top: "32px",
                                      right: "0px",
                                    }}
                                    navigation={[
                                      {
                                        text: "Copy CID",
                                        onClick: (e) => this._handleCopy(e, cid),
                                      },
                                      {
                                        text: "Copy link",
                                        onClick: (e) =>
                                          this._handleCopy(e, Strings.getCIDGatewayURL(cid)),
                                      },
                                      {
                                        text: "Delete",
                                        onClick: (e) => {
                                          e.stopPropagation();
                                          this.setState({ menu: null }, () =>
                                            this._handleDelete(cid, each.id)
                                          );
                                        },
                                      },
                                    ]}
                                  />
                                ) : (
                                  <PopoverNavigation
                                    style={{
                                      top: "32px",
                                      right: "0px",
                                    }}
                                    navigation={[
                                      {
                                        text: "Copy CID",
                                        onClick: (e) => this._handleCopy(e, cid),
                                      },
                                      {
                                        text: "Copy link",
                                        onClick: (e) =>
                                          this._handleCopy(e, Strings.getCIDGatewayURL(cid)),
                                      },
                                    ]}
                                  />
                                )}
                              </Boundary>
                            ) : null}
                          </div> */}

                          <div onClick={(e) => this._handleCheckBox(e, i)}>
                            <CheckBox
                              name={i}
                              value={!!this.state.checked[i]}
                              boxStyle={{
                                height: 24,
                                width: 24,
                                backgroundColor: this.state.checked[i]
                                  ? Constants.system.brand
                                  : "rgba(255, 255, 255, 0.75)",
                              }}
                              style={{
                                position: "absolute",
                                bottom: 8,
                                left: 8,
                              }}
                            />
                          </div>
                        </React.Fragment>
                      ) : null}
                    </span>
                  </Selectable>
                );
              })}
              {[0, 1, 2, 3].map((i) => (
                <div
                  key={i}
                  css={STYLES_IMAGE_BOX}
                  style={{ boxShadow: "none", cursor: "default" }}
                />
              ))}
            </div>
          </GroupSelectable>
          {footer}
          <input
            ref={(c) => {
              this._ref = c;
            }}
            readOnly
            value={this.state.copyValue}
            css={STYLES_COPY_INPUT}
          />
        </React.Fragment>
      );
    }

    const columns = [
      {
        key: "checkbox",
        name: numChecked ? (
          <div
            css={STYLES_CANCEL_BOX}
            onClick={() => {
              this.setState({ checked: {} });
              this.lastSelectedItemIndex = null;
            }}
          >
            <SVG.Minus height="16px" style={{ color: Constants.system.white }} />
          </div>
        ) : (
          <span />
        ),
        width: "24px",
      },
      {
        key: "name",
        name: <div style={{ fontSize: "0.9rem", padding: "18px 0" }}>Name</div>,
        width: "100%",
      },
      {
        key: "size",
        name: <div style={{ fontSize: "0.9rem", padding: "18px 0" }}>Size</div>,
        width: "104px",
      },
      {
        key: "more",
        name: <span />,
        width: "48px",
      },
    ];
    const rows = this.props.items.slice(0, this.state.viewLimit).map((each, index) => {
      const cid = each.cid;

      return {
        ...each,
        checkbox: (
          <div onClick={(e) => this._handleCheckBox(e, index)}>
            <CheckBox
              name={index}
              value={!!this.state.checked[index]}
              boxStyle={{ height: 16, width: 16 }}
              style={{
                position: "relative",
                right: 3,
                margin: "12px 0",
                opacity: numChecked > 0 || this.state.hover === index ? "100%" : "0%",
              }}
            />
          </div>
        ),
        name: (
          <Selectable
            key={each.id}
            selectableKey={index}
            draggable={!numChecked}
            onDragStart={(e) => {
              this._disableDragAndDropUploadEvent();
              this._handleDragToDesktop(e, each);
            }}
            onDragEnd={this._enableDragAndDropUploadEvent}
          >
            <FilePreviewBubble url={cid} type={each.type}>
              <div css={STYLES_CONTAINER_HOVER} onClick={() => this._handleSelect(index)}>
                <div css={STYLES_ICON_BOX_HOVER} style={{ paddingLeft: 0, paddingRight: 18 }}>
                  <FileTypeIcon type={each.type} height="24px" />
                </div>
                <div css={STYLES_LINK}>{each.file || each.name}</div>
              </div>
            </FilePreviewBubble>
          </Selectable>
        ),
        size: <div css={STYLES_VALUE}>{Strings.bytesToSize(each.size)}</div>,
        more: (
          <div
            css={STYLES_ICON_BOX_HOVER}
            onClick={() =>
              this.setState({
                menu: this.state.menu === each.id ? null : each.id,
              })
            }
          >
            <SVG.MoreHorizontal height="24px" />
            {this.state.menu === each.id ? (
              <Boundary
                captureResize={true}
                captureScroll={false}
                enabled
                onOutsideRectEvent={this._handleHide}
              >
                <PopoverNavigation
                  style={{
                    top: "48px",
                    right: "40px",
                  }}
                  navigation={[
                    {
                      text: "Copy CID",
                      onClick: (e) => this._handleCopy(e, cid),
                    },
                    // {
                    //   text: "Copy link",
                    //   onClick: (e) => this._handleCopy(e, Strings.getCIDGatewayURL(cid)),
                    // },
                    {
                      text: "Delete",
                      onClick: (e) => {
                        e.stopPropagation();
                        this.setState({ menu: null }, () => this._handleDelete(cid, each.id));
                      },
                    },
                  ]}
                />
              </Boundary>
            ) : null}
          </div>
        ),
      };
    });

    const data = {
      columns,
      rows,
    };

    return (
      <React.Fragment>
        <GroupSelectable enabled={true} onSelection={this._handleDragAndSelect}>
          {({ isSelecting }) => (
            <Table
              data={data}
              rowStyle={{
                padding: "10px 16px",
                textAlign: "left",
                backgroundColor: Constants.system.white,
              }}
              topRowStyle={{
                padding: "0px 16px",
                textAlign: "left",
                backgroundColor: Constants.system.white,
              }}
              onMouseEnter={(i) => {
                if (isSelecting) return;
                this._handleCheckBoxMouseEnter(i);
              }}
              onMouseLeave={() => {
                if (isSelecting) return;
                this._handleCheckBoxMouseEnter();
              }}
              isShiftDown={this.isShiftDown}
            />
          )}
        </GroupSelectable>
        {footer}
        <input
          ref={(c) => {
            this._ref = c;
          }}
          readOnly
          value={this.state.copyValue}
          css={STYLES_COPY_INPUT}
        />
      </React.Fragment>
    );
  }
}