// Copyright 2019-2021 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only

import * as React from 'react';
import classNames from 'classnames';
import { get, noop } from 'lodash';
import { Manager, Popper, Reference } from 'react-popper';
import { createPortal } from 'react-dom';

import type { StickerPackType, StickerType } from '../../state/ducks/stickers';
import type { LocalizerType } from '../../types/Util';
import type { Theme } from '../../util/theme';
import { StickerPicker } from './StickerPicker';
import { countStickers } from './lib';
import { offsetDistanceModifier } from '../../util/popperUtil';
import { themeClassName } from '../../util/theme';
import * as KeyboardLayout from '../../services/keyboardLayout';
import { useRefMerger } from '../../hooks/useRefMerger';

export type OwnProps = {
  readonly className?: string;
  readonly i18n: LocalizerType;
  readonly receivedPacks: ReadonlyArray<StickerPackType>;
  readonly installedPacks: ReadonlyArray<StickerPackType>;
  readonly blessedPacks: ReadonlyArray<StickerPackType>;
  readonly knownPacks: ReadonlyArray<StickerPackType>;
  readonly installedPack?: StickerPackType | null;
  readonly recentStickers: ReadonlyArray<StickerType>;
  readonly clearInstalledStickerPack: () => unknown;
  readonly onClickAddPack?: () => unknown;
  readonly onPickSticker: (
    packId: string,
    stickerId: number,
    url: string
  ) => unknown;
  readonly showIntroduction?: boolean;
  readonly clearShowIntroduction: () => unknown;
  readonly showPickerHint: boolean;
  readonly clearShowPickerHint: () => unknown;
  readonly position?: 'top-end' | 'top-start';
  readonly theme?: Theme;
};

export type Props = OwnProps;

export const StickerButton = React.memo(
  ({
    className,
    i18n,
    clearInstalledStickerPack,
    onClickAddPack,
    onPickSticker,
    recentStickers,
    receivedPacks,
    installedPack,
    installedPacks,
    blessedPacks,
    knownPacks,
    showIntroduction,
    clearShowIntroduction,
    showPickerHint,
    clearShowPickerHint,
    position = 'top-end',
    theme,
  }: Props) => {
    const [open, setOpen] = React.useState(false);
    const [popperRoot, setPopperRoot] = React.useState<HTMLElement | null>(
      null
    );
    const buttonRef = React.useRef<HTMLButtonElement | null>(null);
    const refMerger = useRefMerger();

    const handleClickButton = React.useCallback(() => {
      // Clear tooltip state
      clearInstalledStickerPack();
      clearShowIntroduction();

      // Handle button click
      if (installedPacks.length === 0) {
        onClickAddPack?.();
      } else if (popperRoot) {
        setOpen(false);
      } else {
        setOpen(true);
      }
    }, [
      clearInstalledStickerPack,
      clearShowIntroduction,
      installedPacks,
      onClickAddPack,
      popperRoot,
      setOpen,
    ]);

    const handlePickSticker = React.useCallback(
      (packId: string, stickerId: number, url: string) => {
        setOpen(false);
        onPickSticker(packId, stickerId, url);
      },
      [setOpen, onPickSticker]
    );

    const handleClose = React.useCallback(() => {
      setOpen(false);
    }, [setOpen]);

    const handleClickAddPack = React.useCallback(() => {
      setOpen(false);
      if (showPickerHint) {
        clearShowPickerHint();
      }
      onClickAddPack?.();
    }, [onClickAddPack, showPickerHint, clearShowPickerHint]);

    const handleClearIntroduction = React.useCallback(() => {
      clearInstalledStickerPack();
      clearShowIntroduction();
    }, [clearInstalledStickerPack, clearShowIntroduction]);

    // Create popper root and handle outside clicks
    React.useEffect(() => {
      if (open) {
        const root = document.createElement('div');
        setPopperRoot(root);
        document.body.appendChild(root);
        const handleOutsideClick = ({ target }: MouseEvent) => {
          const targetElement = target as HTMLElement;
          const targetClassName = targetElement
            ? targetElement.className || ''
            : '';

          // We need to special-case sticker picker header buttons, because they can
          //   disappear after being clicked, which breaks the .contains() check below.
          const isMissingButtonClass =
            !targetClassName ||
            targetClassName.indexOf('module-sticker-picker__header__button') <
              0;

          if (
            !root.contains(targetElement) &&
            isMissingButtonClass &&
            targetElement !== buttonRef.current
          ) {
            setOpen(false);
          }
        };
        document.addEventListener('click', handleOutsideClick);

        return () => {
          document.body.removeChild(root);
          document.removeEventListener('click', handleOutsideClick);
          setPopperRoot(null);
        };
      }

      return noop;
    }, [open, setOpen, setPopperRoot]);

    // Install keyboard shortcut to open sticker picker
    React.useEffect(() => {
      const handleKeydown = (event: KeyboardEvent) => {
        const { ctrlKey, metaKey, shiftKey } = event;
        const commandKey = get(window, 'platform') === 'darwin' && metaKey;
        const controlKey = get(window, 'platform') !== 'darwin' && ctrlKey;
        const commandOrCtrl = commandKey || controlKey;
        const key = KeyboardLayout.lookup(event);

        // We don't want to open up if the conversation has any panels open
        const panels = document.querySelectorAll('.conversation .panel');
        if (panels && panels.length > 1) {
          return;
        }

        if (commandOrCtrl && shiftKey && (key === 's' || key === 'S')) {
          event.stopPropagation();
          event.preventDefault();

          setOpen(!open);
        }
      };
      document.addEventListener('keydown', handleKeydown);

      return () => {
        document.removeEventListener('keydown', handleKeydown);
      };
    }, [open, setOpen]);

    // Clear the installed pack after one minute
    React.useEffect(() => {
      if (installedPack) {
        const timerId = setTimeout(clearInstalledStickerPack, 10 * 1000);

        return () => {
          clearTimeout(timerId);
        };
      }

      return noop;
    }, [installedPack, clearInstalledStickerPack]);

    if (
      countStickers({
        knownPacks,
        blessedPacks,
        installedPacks,
        receivedPacks,
      }) === 0
    ) {
      return null;
    }

    return (
      <Manager>
        <Reference>
          {({ ref }) => (
            <button
              type="button"
              ref={refMerger(buttonRef, ref)}
              onClick={handleClickButton}
              className={classNames(
                {
                  'module-sticker-button__button': true,
                  'module-sticker-button__button--active': open,
                },
                className
              )}
              aria-label={i18n('stickers--StickerPicker--Open')}
            />
          )}
        </Reference>
        {!open && !showIntroduction && installedPack ? (
          <Popper
            placement={position}
            key={installedPack.id}
            modifiers={[offsetDistanceModifier(6)]}
          >
            {({ ref, style, placement, arrowProps }) => (
              <div className={theme ? themeClassName(theme) : undefined}>
                <button
                  type="button"
                  ref={ref}
                  style={style}
                  className="module-sticker-button__tooltip"
                  onClick={clearInstalledStickerPack}
                >
                  {installedPack.cover ? (
                    <img
                      className="module-sticker-button__tooltip__image"
                      src={installedPack.cover.url}
                      alt={installedPack.title}
                    />
                  ) : (
                    <div className="module-sticker-button__tooltip__image-placeholder" />
                  )}
                  <span className="module-sticker-button__tooltip__text">
                    <span className="module-sticker-button__tooltip__text__title">
                      {installedPack.title}
                    </span>{' '}
                    installed
                  </span>
                  <div
                    ref={arrowProps.ref}
                    style={arrowProps.style}
                    className={classNames(
                      'module-sticker-button__tooltip__triangle',
                      `module-sticker-button__tooltip__triangle--${placement}`
                    )}
                  />
                </button>
              </div>
            )}
          </Popper>
        ) : null}
        {!open && showIntroduction ? (
          <Popper placement={position} modifiers={[offsetDistanceModifier(6)]}>
            {({ ref, style, placement, arrowProps }) => (
              <div className={theme ? themeClassName(theme) : undefined}>
                <button
                  type="button"
                  ref={ref}
                  style={style}
                  className={classNames(
                    'module-sticker-button__tooltip',
                    'module-sticker-button__tooltip--introduction'
                  )}
                  onClick={handleClearIntroduction}
                >
                  <img
                    className="module-sticker-button__tooltip--introduction__image"
                    srcSet="images/sticker_splash@1x.png 1x, images/sticker_splash@2x.png 2x"
                    alt={i18n('stickers--StickerManager--Introduction--Image')}
                  />
                  <div className="module-sticker-button__tooltip--introduction__meta">
                    <div className="module-sticker-button__tooltip--introduction__meta__title">
                      {i18n('stickers--StickerManager--Introduction--Title')}
                    </div>
                    <div className="module-sticker-button__tooltip--introduction__meta__subtitle">
                      {i18n('stickers--StickerManager--Introduction--Body')}
                    </div>
                  </div>
                  <div className="module-sticker-button__tooltip--introduction__close">
                    <button
                      type="button"
                      className="module-sticker-button__tooltip--introduction__close__button"
                      onClick={handleClearIntroduction}
                      aria-label={i18n('close')}
                    />
                  </div>
                  <div
                    ref={arrowProps.ref}
                    style={arrowProps.style}
                    className={classNames(
                      'module-sticker-button__tooltip__triangle',
                      'module-sticker-button__tooltip__triangle--introduction',
                      `module-sticker-button__tooltip__triangle--${placement}`
                    )}
                  />
                </button>
              </div>
            )}
          </Popper>
        ) : null}
        {open && popperRoot
          ? createPortal(
              <Popper placement={position}>
                {({ ref, style }) => (
                  <div className={theme ? themeClassName(theme) : undefined}>
                    <StickerPicker
                      ref={ref}
                      i18n={i18n}
                      style={style}
                      packs={installedPacks}
                      onClose={handleClose}
                      onClickAddPack={
                        onClickAddPack ? handleClickAddPack : undefined
                      }
                      onPickSticker={handlePickSticker}
                      recentStickers={recentStickers}
                      showPickerHint={showPickerHint}
                    />
                  </div>
                )}
              </Popper>,
              popperRoot
            )
          : null}
      </Manager>
    );
  }
);