/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @format
 */

import {Filter} from '../filter/types';
import {TableColumns} from '../table/types';
import {PureComponent} from 'react';
import Toolbar from '../Toolbar';
import Input from '../Input';
import {colors} from '../colors';
import Text from '../Text';
import FlexBox from '../FlexBox';
import Glyph from '../Glyph';
import FilterToken from './FilterToken';
import styled from '@emotion/styled';
import {debounce} from 'lodash';
import ToggleButton from '../ToggleSwitch';
import React from 'react';
import Layout from '../Layout';
import {theme} from '../../../sandy-chrome/theme';

const SearchBar = styled(Toolbar)({
  height: 42,
  padding: 6,
});
SearchBar.displayName = 'Searchable:SearchBar';

export const SearchBox = styled(FlexBox)<{isInvalidInput?: boolean}>(
  (props) => {
    return {
      flex: `1 0 0`,
      minWidth: 150,
      height: 30,
      backgroundColor: colors.white,
      borderRadius: '999em',
      border: `1px solid ${
        !props.isInvalidInput ? colors.light15 : colors.red
      }`,
      alignItems: 'center',
      paddingLeft: 4,
    };
  },
);
SearchBox.displayName = 'Searchable:SearchBox';

export const SearchInput = styled(Input)<{
  focus?: boolean;
  regex?: boolean;
  isValidInput?: boolean;
}>((props) => ({
  border: props.focus ? '1px solid black' : 0,
  ...(props.regex ? {fontFamily: 'monospace'} : {}),
  padding: 0,
  fontSize: '1em',
  flexGrow: 1,
  height: 'auto',
  lineHeight: '100%',
  marginLeft: 2,
  marginRight: 8,
  width: '100%',
  color: props.regex && !props.isValidInput ? colors.red : colors.black,
  '&::-webkit-input-placeholder': {
    color: colors.placeholder,
    fontWeight: 300,
  },
}));
SearchInput.displayName = 'Searchable:SearchInput';

const Clear = styled(Text)({
  position: 'absolute',
  right: 6,
  top: '50%',
  marginTop: -9,
  fontSize: 16,
  width: 17,
  height: 17,
  borderRadius: 999,
  lineHeight: '15.5px',
  textAlign: 'center',
  backgroundColor: 'rgba(0,0,0,0.1)',
  color: colors.white,
  display: 'block',
  '&:hover': {
    backgroundColor: 'rgba(0,0,0,0.15)',
  },
});
Clear.displayName = 'Searchable:Clear';

export const SearchIcon = styled(Glyph)({
  marginRight: 3,
  marginLeft: 3,
  marginTop: -1,
  minWidth: 16,
});
SearchIcon.displayName = 'Searchable:SearchIcon';

const Actions = styled(Layout.Horizontal)({
  marginLeft: 8,
});
Actions.displayName = 'Searchable:Actions';

export type SearchableProps = {
  addFilter: (filter: Filter) => void;
  searchTerm: string;
  filters: Array<Filter>;
  allowRegexSearch?: boolean;
  allowContentSearch?: boolean;
  regexEnabled?: boolean;
  contentSearchEnabled?: boolean;
};

type Props = {
  placeholder?: string;
  actions: React.ReactNode;
  tableKey: string;
  columns?: TableColumns;
  onFilterChange: (filters: Array<Filter>) => void;
  defaultFilters: Array<Filter>;
  clearSearchTerm: boolean;
  defaultSearchTerm: string;
  allowRegexSearch: boolean;
  allowContentSearch: boolean;
};

type State = {
  filters: Array<Filter>;
  focusedToken: number;
  searchTerm: string;
  hasFocus: boolean;
  regexEnabled: boolean;
  contentSearchEnabled: boolean;
  compiledRegex: RegExp | null | undefined;
};

function compileRegex(s: string): RegExp | null {
  try {
    return new RegExp(s);
  } catch (e) {
    return null;
  }
}

/**
 * Higher-order-component that allows adding a searchbar on top of the wrapped
 * component. See SearchableManagedTable for usage with a table.
 */
export default function Searchable(
  Component: React.ComponentType<any>,
): React.ComponentType<any> {
  return class extends PureComponent<Props, State> {
    static displayName = `Searchable(${Component.displayName})`;

    static defaultProps = {
      placeholder: 'Search...',
      clearSearchTerm: false,
    };

    state: State = {
      filters: this.props.defaultFilters || [],
      focusedToken: -1,
      searchTerm: this.props.defaultSearchTerm ?? '',
      hasFocus: false,
      regexEnabled: false,
      contentSearchEnabled: false,
      compiledRegex: null,
    };

    _inputRef: HTMLInputElement | undefined | null;

    componentDidMount() {
      window.document.addEventListener('keydown', this.onKeyDown);
      const {defaultFilters} = this.props;
      let savedState:
        | {
            filters: Array<Filter>;
            regexEnabled?: boolean;
            contentSearchEnabled?: boolean;
            searchTerm?: string;
          }
        | undefined;

      if (this.getTableKey()) {
        try {
          savedState = JSON.parse(
            window.localStorage.getItem(this.getPersistKey()) || 'null',
          );
        } catch (e) {
          window.localStorage.removeItem(this.getPersistKey());
        }
      }

      if (savedState) {
        if (defaultFilters != null) {
          // merge default filter with persisted filters
          const savedStateFilters = savedState.filters;
          defaultFilters.forEach((defaultFilter) => {
            const filterIndex = savedStateFilters.findIndex(
              (f) => f.key === defaultFilter.key,
            );
            const savedDefaultFilter = savedStateFilters[filterIndex];
            if (filterIndex > -1 && savedDefaultFilter.type === 'enum') {
              if (defaultFilter.type === 'enum') {
                savedDefaultFilter.enum = defaultFilter.enum;
              }
              const filters = new Set(
                savedDefaultFilter.enum.map((filter) => filter.value),
              );
              savedStateFilters[
                filterIndex
              ].value = savedDefaultFilter.value.filter((value) =>
                filters.has(value),
              );
            }
          });
        }
        const searchTerm = this.props.clearSearchTerm
          ? this.props.defaultSearchTerm
          : savedState.searchTerm || this.state.searchTerm;
        this.setState({
          searchTerm: searchTerm,
          filters: savedState.filters || this.state.filters,
          regexEnabled: savedState.regexEnabled || this.state.regexEnabled,
          contentSearchEnabled:
            savedState.contentSearchEnabled || this.state.contentSearchEnabled,
          compiledRegex: compileRegex(searchTerm),
        });
      }
    }

    componentDidUpdate(prevProps: Props, prevState: State) {
      if (
        this.getTableKey() &&
        (prevState.searchTerm !== this.state.searchTerm ||
          prevState.regexEnabled != this.state.regexEnabled ||
          prevState.contentSearchEnabled != this.state.contentSearchEnabled ||
          prevState.filters !== this.state.filters)
      ) {
        window.localStorage.setItem(
          this.getPersistKey(),
          JSON.stringify({
            searchTerm: this.state.searchTerm,
            filters: this.state.filters,
            regexEnabled: this.state.regexEnabled,
            contentSearchEnabled: this.state.contentSearchEnabled,
          }),
        );
        if (this.props.onFilterChange != null) {
          this.props.onFilterChange(this.state.filters);
        }
      } else {
        let mergedFilters = this.state.filters;
        if (prevProps.defaultFilters !== this.props.defaultFilters) {
          mergedFilters = [...this.state.filters];
          this.props.defaultFilters.forEach((defaultFilter: Filter) => {
            const filterIndex = mergedFilters.findIndex(
              (f: Filter) => f.key === defaultFilter.key,
            );
            if (filterIndex > -1) {
              mergedFilters[filterIndex] = defaultFilter;
            } else {
              mergedFilters.push(defaultFilter);
            }
          });
        }
        let newSearchTerm = this.state.searchTerm;
        if (
          prevProps.defaultSearchTerm !== this.props.defaultSearchTerm ||
          prevProps.defaultFilters !== this.props.defaultFilters
        ) {
          newSearchTerm = this.props.defaultSearchTerm ?? '';
        }
        this.setState({
          filters: mergedFilters,
          searchTerm: newSearchTerm,
        });
      }
    }

    componentWillUnmount() {
      window.document.removeEventListener('keydown', this.onKeyDown);
    }

    getTableKey = (): string | null | undefined => {
      if (this.props.tableKey) {
        return this.props.tableKey;
      } else if (this.props.columns) {
        // if we have a table, we are using it's colums to uniquely identify
        // the table (in case there is more than one table rendered at a time)
        return (
          'TABLE_COLUMNS_' +
          Object.keys(this.props.columns).join('_').toUpperCase()
        );
      }
    };

    onKeyDown = (e: KeyboardEvent) => {
      const ctrlOrCmd = (e: KeyboardEvent) =>
        (e.metaKey && process.platform === 'darwin') ||
        (e.ctrlKey && process.platform !== 'darwin');

      if (e.key === 'f' && ctrlOrCmd(e) && this._inputRef) {
        e.preventDefault();
        if (this._inputRef) {
          this._inputRef.focus();
        }
      } else if (e.key === 'Escape' && this._inputRef) {
        this._inputRef.blur();
        this.setState({searchTerm: ''});
      } else if (e.key === 'Backspace' && this.hasFocus()) {
        const lastFilter = this.state.filters[this.state.filters.length - 1];
        if (
          this.state.focusedToken === -1 &&
          this.state.searchTerm === '' &&
          this._inputRef &&
          lastFilter &&
          (lastFilter.type !== 'enum' || !lastFilter.persistent)
        ) {
          this._inputRef.blur();
          this.setState({focusedToken: this.state.filters.length - 1});
        } else {
          this.removeFilter(this.state.focusedToken);
        }
      } else if (
        e.key === 'Delete' &&
        this.hasFocus() &&
        this.state.focusedToken > -1
      ) {
        this.removeFilter(this.state.focusedToken);
      } else if (e.key === 'Enter' && this.hasFocus() && this._inputRef) {
        this.matchTags(this._inputRef.value, true);
        this.setState({searchTerm: ''});
      }
    };

    onChangeSearchTerm = (e: React.ChangeEvent<HTMLInputElement>) => {
      this.setState({
        searchTerm: e.target.value,
        compiledRegex: compileRegex(e.target.value),
      });
      this.matchTags(e.target.value, false);
    };

    matchTags = debounce((searchTerm: string, matchEnd: boolean) => {
      const filterPattern = matchEnd
        ? /([a-z]\w*[!]?[:=]\S+)($|\s)/gi
        : /([a-z]\w*[!]?[:=]\S+)\s/gi;
      const match = searchTerm.match(filterPattern);
      if (match && match.length > 0) {
        match.forEach((filter: string) => {
          const separator =
            filter.indexOf(':') > filter.indexOf('=') ? ':' : '=';
          let [key, ...values] = filter.split(separator);
          let value = values.join(separator).trim();
          let type: 'include' | 'exclude' | 'enum' = 'include';
          // if value starts with !, it's an exclude filter
          if (value.indexOf('!') === 0) {
            type = 'exclude';
            value = value.substring(1);
          }
          // if key ends with !, it's an exclude filter
          if (key.indexOf('!') === key.length - 1) {
            type = 'exclude';
            key = key.slice(0, -1);
          }
          this.addFilter({
            type,
            key,
            value,
          });
        });

        searchTerm = searchTerm.replace(filterPattern, '');
      }
    }, 200);

    setInputRef = (ref: HTMLInputElement | null) => {
      this._inputRef = ref;
    };

    addFilter = (filter: Filter) => {
      const filterIndex = this.state.filters.findIndex(
        (f) => f.key === filter.key,
      );
      if (filterIndex > -1) {
        const filters = [...this.state.filters];
        const defaultFilter: Filter = this.props.defaultFilters?.[filterIndex];
        const filter = filters[filterIndex];
        if (
          defaultFilter != null &&
          defaultFilter.type === 'enum' &&
          filter.type === 'enum'
        ) {
          filter.enum = defaultFilter.enum;
        }
        this.setState({filters});
        // filter for this key already exists
        return;
      }
      // persistent filters are always at the front
      const filters =
        filter.type === 'enum' && filter.persistent === true
          ? [filter, ...this.state.filters]
          : this.state.filters.concat(filter);
      this.setState({
        filters,
        focusedToken: -1,
      });
    };

    removeFilter = (index: number) => {
      const filters = this.state.filters.filter((_, i) => i !== index);
      const focusedToken = -1;
      this.setState({filters, focusedToken}, () => {
        if (this._inputRef) {
          this._inputRef.focus();
        }
      });
    };

    replaceFilter = (index: number, filter: Filter) => {
      const filters = [...this.state.filters];
      filters.splice(index, 1, filter);
      this.setState({filters});
    };

    onInputFocus = () =>
      this.setState({
        focusedToken: -1,
        hasFocus: true,
      });

    onInputBlur = () =>
      setTimeout(
        () =>
          this.setState({
            hasFocus: false,
          }),
        100,
      );

    onTokenFocus = (focusedToken: number) => this.setState({focusedToken});

    onTokenBlur = () => this.setState({focusedToken: -1});

    onRegexToggled = () => {
      this.setState({
        regexEnabled: !this.state.regexEnabled,
        compiledRegex: compileRegex(this.state.searchTerm),
      });
    };

    onContentSearchToggled = () => {
      this.setState({
        contentSearchEnabled: !this.state.contentSearchEnabled,
      });
    };

    hasFocus = (): boolean => {
      return this.state.focusedToken !== -1 || this.state.hasFocus;
    };

    clear = () =>
      this.setState({
        filters: this.state.filters.filter(
          (f) => f.type === 'enum' && f.persistent === true,
        ),
        searchTerm: '',
      });

    getPersistKey = () => `SEARCHABLE_STORAGE_KEY_${this.getTableKey() || ''}`;

    render() {
      const {placeholder, actions, ...props} = this.props;
      return (
        <Layout.Top>
          <SearchBar position="top" key="searchbar">
            <SearchBox tabIndex={-1}>
              <SearchIcon
                name="magnifying-glass"
                color={colors.macOSTitleBarIcon}
                size={16}
              />
              {this.state.filters.map((filter, i) => (
                <FilterToken
                  key={`${filter.key}:${filter.type}`}
                  index={i}
                  filter={filter}
                  focused={i === this.state.focusedToken}
                  onFocus={this.onTokenFocus}
                  onDelete={this.removeFilter}
                  onReplace={this.replaceFilter}
                  onBlur={this.onTokenBlur}
                />
              ))}
              <SearchInput
                placeholder={placeholder}
                onChange={this.onChangeSearchTerm}
                value={this.state.searchTerm}
                ref={this.setInputRef}
                onFocus={this.onInputFocus}
                onBlur={this.onInputBlur}
                isValidInput={
                  this.state.regexEnabled
                    ? this.state.compiledRegex !== null
                    : true
                }
                regex={Boolean(
                  this.state.regexEnabled && this.state.searchTerm,
                )}
              />
              {(this.state.searchTerm || this.state.filters.length > 0) && (
                <Clear onClick={this.clear}>&times;</Clear>
              )}
            </SearchBox>
            {this.props.allowRegexSearch ? (
              <ToggleButton
                toggled={this.state.regexEnabled}
                onClick={this.onRegexToggled}
                label={'Regex'}
              />
            ) : null}
            {this.props.allowContentSearch ? (
              <ToggleButton
                toggled={this.state.contentSearchEnabled}
                onClick={this.onContentSearchToggled}
                label={'Contents'}
                tooltip={
                  'Search the full item contents (warning: this can be quite slow)'
                }
              />
            ) : null}
            {actions != null && (
              <Actions gap={theme.space.small}>{actions}</Actions>
            )}
          </SearchBar>
          <Component
            {...props}
            key="table"
            addFilter={this.addFilter}
            searchTerm={this.state.searchTerm}
            regexEnabled={this.state.regexEnabled}
            contentSearchEnabled={this.state.contentSearchEnabled}
            filters={this.state.filters}
          />
        </Layout.Top>
      );
    }
  };
}