// Copyright (C) The Arvados Authors. All rights reserved.
//
// SPDX-License-Identifier: AGPL-3.0

import { unionize, ofType, UnionOf } from "~/common/unionize";
import { GroupContentsResource, GroupContentsResourcePrefix } from '~/services/groups-service/groups-service';
import { Dispatch } from 'redux';
import { change, arrayPush } from 'redux-form';
import { RootState } from '~/store/store';
import { initUserProject } from '~/store/tree-picker/tree-picker-actions';
import { ServiceRepository } from '~/services/services';
import { FilterBuilder } from "~/services/api/filter-builder";
import { ResourceKind } from '~/models/resource';
import { GroupClass } from '~/models/group';
import { SearchView } from '~/store/search-bar/search-bar-reducer';
import { navigateToSearchResults, navigateTo } from '~/store/navigation/navigation-action';
import { snackbarActions, SnackbarKind } from '~/store/snackbar/snackbar-actions';
import { initialize } from 'redux-form';
import { SearchBarAdvanceFormData, PropertyValues, ClusterObjectType } from '~/models/search-bar';
import { debounce } from 'debounce';
import * as _ from "lodash";

export const searchBarActions = unionize({
    SET_CURRENT_VIEW: ofType<string>(),
    OPEN_SEARCH_VIEW: ofType<{}>(),
    CLOSE_SEARCH_VIEW: ofType<{}>(),
    SET_SEARCH_RESULTS: ofType<GroupContentsResource[]>(),
    SET_SEARCH_VALUE: ofType<string>(),
    SET_SAVED_QUERIES: ofType<SearchBarAdvanceFormData[]>(),
    SET_RECENT_QUERIES: ofType<string[]>(),
    UPDATE_SAVED_QUERY: ofType<SearchBarAdvanceFormData[]>(),
    SET_SELECTED_ITEM: ofType<string>(),
    MOVE_UP: ofType<{}>(),
    MOVE_DOWN: ofType<{}>(),
    SELECT_FIRST_ITEM: ofType<{}>()
});

export type SearchBarActions = UnionOf<typeof searchBarActions>;

export const SEARCH_BAR_ADVANCE_FORM_NAME = 'searchBarAdvanceFormName';

export const SEARCH_BAR_ADVANCE_FORM_PICKER_ID = 'searchBarAdvanceFormPickerId';

export const DEFAULT_SEARCH_DEBOUNCE = 1000;

export const goToView = (currentView: string) => searchBarActions.SET_CURRENT_VIEW(currentView);

export const saveRecentQuery = (query: string) =>
    (dispatch: Dispatch<any>, getState: () => RootState, services: ServiceRepository) =>
        services.searchService.saveRecentQuery(query);


export const loadRecentQueries = () =>
    (dispatch: Dispatch<any>, getState: () => RootState, services: ServiceRepository) => {
        const recentQueries = services.searchService.getRecentQueries();
        dispatch(searchBarActions.SET_RECENT_QUERIES(recentQueries));
        return recentQueries;
    };

export const searchData = (searchValue: string) =>
    async (dispatch: Dispatch, getState: () => RootState) => {
        const currentView = getState().searchBar.currentView;
        dispatch(searchBarActions.SET_SEARCH_VALUE(searchValue));
        if (searchValue.length > 0) {
            dispatch<any>(searchGroups(searchValue, 5));
            if (currentView === SearchView.BASIC) {
                dispatch(searchBarActions.CLOSE_SEARCH_VIEW());
                dispatch(navigateToSearchResults);
            }
        }
    };

export const searchAdvanceData = (data: SearchBarAdvanceFormData) =>
    async (dispatch: Dispatch) => {
        dispatch<any>(saveQuery(data));
        dispatch(searchBarActions.SET_CURRENT_VIEW(SearchView.BASIC));
        dispatch(searchBarActions.CLOSE_SEARCH_VIEW());
        dispatch(navigateToSearchResults);
    };

export const setSearchValueFromAdvancedData = (data: SearchBarAdvanceFormData, prevData: SearchBarAdvanceFormData) =>
    (dispatch: Dispatch) => {
        let value = '';
        if (data.type) {
            value += ` type:${data.type}`;
        }
        if (data.cluster) {
            value += ` cluster:${data.cluster}`;
        }
        if (data.projectUuid) {
            value += ` project:${data.projectUuid}`;
        }
        if (data.inTrash) {
            value += ` is:trashed`;
        }
        if (data.dateFrom) {
            value += ` from:${data.dateFrom}`;
        }
        if (data.dateTo) {
            value += ` from:${data.dateTo}`;
        }
        value = value.substr(1) + data.searchQuery;
        dispatch(searchBarActions.SET_SEARCH_VALUE(value));
    };

const saveQuery = (data: SearchBarAdvanceFormData) =>
    (dispatch: Dispatch<any>, getState: () => RootState, services: ServiceRepository) => {
        const savedQueries = services.searchService.getSavedQueries();
        if (data.saveQuery && data.searchQuery) {
            const filteredQuery = savedQueries.find(query => query.searchQuery === data.searchQuery);
            if (filteredQuery) {
                services.searchService.editSavedQueries(data);
                dispatch(searchBarActions.UPDATE_SAVED_QUERY(savedQueries));
                dispatch(snackbarActions.OPEN_SNACKBAR({ message: 'Query has been successfully updated', hideDuration: 2000, kind: SnackbarKind.SUCCESS }));
            } else {
                services.searchService.saveQuery(data);
                dispatch(searchBarActions.SET_SAVED_QUERIES(savedQueries));
                dispatch(snackbarActions.OPEN_SNACKBAR({ message: 'Query has been successfully saved', hideDuration: 2000, kind: SnackbarKind.SUCCESS }));
            }
        }
    };

export const deleteSavedQuery = (id: number) =>
    (dispatch: Dispatch<any>, getState: () => RootState, services: ServiceRepository) => {
        services.searchService.deleteSavedQuery(id);
        const savedSearchQueries = services.searchService.getSavedQueries();
        dispatch(searchBarActions.SET_SAVED_QUERIES(savedSearchQueries));
        return savedSearchQueries || [];
    };

export const editSavedQuery = (data: SearchBarAdvanceFormData) =>
    (dispatch: Dispatch<any>) => {
        dispatch(searchBarActions.SET_CURRENT_VIEW(SearchView.ADVANCED));
        dispatch(searchBarActions.SET_SEARCH_VALUE(data.searchQuery));
        dispatch<any>(initialize(SEARCH_BAR_ADVANCE_FORM_NAME, data));
    };

export const openSearchView = () =>
    (dispatch: Dispatch<any>, getState: () => RootState, services: ServiceRepository) => {
        const savedSearchQueries = services.searchService.getSavedQueries();
        dispatch(searchBarActions.SET_SAVED_QUERIES(savedSearchQueries));
        dispatch(loadRecentQueries());
        dispatch(searchBarActions.OPEN_SEARCH_VIEW());
        dispatch(searchBarActions.SELECT_FIRST_ITEM());
    };

export const closeSearchView = () =>
    (dispatch: Dispatch<any>) => {
        dispatch(searchBarActions.SET_SELECTED_ITEM(''));
        dispatch(searchBarActions.CLOSE_SEARCH_VIEW());
    };

export const closeAdvanceView = () =>
    (dispatch: Dispatch<any>) => {
        dispatch(searchBarActions.SET_SEARCH_VALUE(''));
        dispatch(searchBarActions.SET_CURRENT_VIEW(SearchView.BASIC));
    };

export const navigateToItem = (uuid: string) =>
    (dispatch: Dispatch<any>) => {
        dispatch(searchBarActions.SET_SELECTED_ITEM(''));
        dispatch(searchBarActions.CLOSE_SEARCH_VIEW());
        dispatch(navigateTo(uuid));
    };

export const changeData = (searchValue: string) =>
    (dispatch: Dispatch, getState: () => RootState) => {
        dispatch(searchBarActions.SET_SEARCH_VALUE(searchValue));
        const currentView = getState().searchBar.currentView;
        const searchValuePresent = searchValue.length > 0;

        if (currentView === SearchView.ADVANCED) {

        } else if (searchValuePresent) {
            dispatch(searchBarActions.SET_CURRENT_VIEW(SearchView.AUTOCOMPLETE));
            dispatch(searchBarActions.SET_SELECTED_ITEM(searchValue));
            debounceStartSearch(dispatch);
        } else {
            dispatch(searchBarActions.SET_CURRENT_VIEW(SearchView.BASIC));
            dispatch(searchBarActions.SET_SEARCH_RESULTS([]));
            dispatch(searchBarActions.SELECT_FIRST_ITEM());
        }
    };

export const submitData = (event: React.FormEvent<HTMLFormElement>) =>
    (dispatch: Dispatch, getState: () => RootState) => {
        event.preventDefault();
        const searchValue = getState().searchBar.searchValue;
        dispatch<any>(saveRecentQuery(searchValue));
        dispatch<any>(loadRecentQueries());
        dispatch(searchBarActions.CLOSE_SEARCH_VIEW());
        dispatch(searchBarActions.SET_SEARCH_VALUE(searchValue));
        dispatch(searchBarActions.SET_SEARCH_RESULTS([]));
        dispatch(navigateToSearchResults);
    };

const debounceStartSearch = debounce((dispatch: Dispatch) => dispatch<any>(startSearch()), DEFAULT_SEARCH_DEBOUNCE);

const startSearch = () =>
    (dispatch: Dispatch, getState: () => RootState) => {
        const searchValue = getState().searchBar.searchValue;
        dispatch<any>(searchData(searchValue));
    };

const searchGroups = (searchValue: string, limit: number) =>
    async (dispatch: Dispatch, getState: () => RootState, services: ServiceRepository) => {
        const currentView = getState().searchBar.currentView;

        if (searchValue || currentView === SearchView.ADVANCED) {
            const filters = getFilters('name', searchValue);
            const { items } = await services.groupsService.contents('', {
                filters,
                limit,
                recursive: true
            });
            dispatch(searchBarActions.SET_SEARCH_RESULTS(items));
        }
    };

export const parseQuery: (searchValue: string) => { hasKeywords: boolean; values: string[]; properties: any } = (searchValue: string) => {
    const keywords = [
        'type:',
        'cluster:',
        'project:',
        'is:',
        'from:',
        'to:'
    ];

    const hasKeywords = (search: string) => keywords.reduce((acc, keyword) => acc + search.indexOf(keyword) >= 0 ? 1 : 0, 0);
    let keywordsCnt = 0;

    const properties = {};

    keywords.forEach(k => {
        const p = searchValue.indexOf(k);
        const l = searchValue.length;
        if (p >= 0) {
            keywordsCnt += 1;

            let v = '';
            let i = p + k.length;
            while (i < l && searchValue[i] === ' ') {
                ++i;
            }
            const vp = i;
            while (i < l && searchValue[i] !== ' ') {
                v += searchValue[i];
                ++i;
            }

            if (hasKeywords(v)) {
                searchValue = searchValue.substr(0, p) + searchValue.substr(vp);
            } else {
                if (v !== '') {
                    properties[k.substr(0, k.length - 1)] = v;
                }
                searchValue = searchValue.substr(0, p) + searchValue.substr(i);
            }
        }
    });

    const values = _.uniq(searchValue.split(' ').filter(v => v.length > 0));

    return { hasKeywords: keywordsCnt > 0, values, properties };
};

export const getFilters = (filterName: string, searchValue: string): string => {
    const filter = new FilterBuilder();

    const pq = parseQuery(searchValue);

    if (!pq.hasKeywords) {
        filter
            .addILike(filterName, searchValue, GroupContentsResourcePrefix.COLLECTION)
            .addILike(filterName, searchValue, GroupContentsResourcePrefix.PROCESS)
            .addILike(filterName, searchValue, GroupContentsResourcePrefix.PROJECT);
    } else {

        if (pq.properties.type) {
            pq.values.forEach(v => {
                let prefix = '';
                switch (ResourceKind[pq.properties.type]) {
                    case ResourceKind.PROJECT:
                        prefix = GroupContentsResourcePrefix.PROJECT;
                        break;
                    case ResourceKind.COLLECTION:
                        prefix = GroupContentsResourcePrefix.COLLECTION;
                        break;
                    case ResourceKind.PROCESS:
                        prefix = GroupContentsResourcePrefix.PROCESS;
                        break;
                }
                if (prefix !== '') {
                    filter.addILike(filterName, v, prefix);
                }
            });
        } else {
            pq.values.forEach(v => {
                filter
                    .addILike(filterName, v, GroupContentsResourcePrefix.COLLECTION)
                    .addILike(filterName, v, GroupContentsResourcePrefix.PROCESS)
                    .addILike(filterName, v, GroupContentsResourcePrefix.PROJECT);
            });
        }

        if (pq.properties.is && pq.properties.is === 'trashed') {
        }

        if (pq.properties.project) {
            filter.addEqual('owner_uuid', pq.properties.project, GroupContentsResourcePrefix.PROJECT);
        }

        if (pq.properties.from) {
            filter.addGte('modified_at', buildDateFilter(pq.properties.from));
        }

        if (pq.properties.to) {
            filter.addLte('modified_at', buildDateFilter(pq.properties.to));
        }
        // filter
        //     .addIsA("uuid", buildUuidFilter(resourceKind))
        //     .addILike(filterName, searchValue, GroupContentsResourcePrefix.COLLECTION)
        //     .addILike(filterName, searchValue, GroupContentsResourcePrefix.PROCESS)
        //     .addILike(filterName, searchValue, GroupContentsResourcePrefix.PROJECT)
        //     .addLte('modified_at', buildDateFilter(dateTo))
        //     .addGte('modified_at', buildDateFilter(dateFrom))
        //     .addEqual('groupClass', GroupClass.PROJECT, GroupContentsResourcePrefix.PROJECT)
    }

    return filter
        .addEqual('groupClass', GroupClass.PROJECT, GroupContentsResourcePrefix.PROJECT)
        .getFilters();
};

const buildUuidFilter = (type?: ResourceKind): ResourceKind[] => {
    return type ? [type] : [ResourceKind.PROJECT, ResourceKind.COLLECTION, ResourceKind.PROCESS];
};

const buildDateFilter = (date?: string): string => {
    return date ? date : '';
};

export const initAdvanceFormProjectsTree = () =>
    (dispatch: Dispatch) => {
        dispatch<any>(initUserProject(SEARCH_BAR_ADVANCE_FORM_PICKER_ID));
    };

export const changeAdvanceFormProperty = (property: string, value: PropertyValues[] | string = '') =>
    (dispatch: Dispatch) => {
        dispatch(change(SEARCH_BAR_ADVANCE_FORM_NAME, property, value));
    };

export const updateAdvanceFormProperties = (propertyValues: PropertyValues) =>
    (dispatch: Dispatch) => {
        dispatch(arrayPush(SEARCH_BAR_ADVANCE_FORM_NAME, 'properties', propertyValues));
    };

export const moveUp = () =>
    (dispatch: Dispatch) => {
        dispatch(searchBarActions.MOVE_UP());
    };

export const moveDown = () =>
    (dispatch: Dispatch) => {
        dispatch(searchBarActions.MOVE_DOWN());
    };