/**
 * Copyright (c) 2021, WSO2 LLC. (https://www.wso2.com). All Rights Reserved.
 *
 * WSO2 LLC. licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import { hasRequiredScopes, isFeatureEnabled, resolveUserstore } from "@wso2is/core/helpers";
import { LoadableComponentInterface, SBACInterface, TestableComponentInterface } from "@wso2is/core/models";
import {
    AnimatedAvatar,
    AppAvatar,
    ConfirmationModal,
    ContentLoader,
    DataTable,
    EmphasizedSegment,
    EmptyPlaceholder,
    LinkButton,
    PrimaryButton,
    TableActionsInterface,
    TableColumnInterface
} from "@wso2is/react-components";
import React, { ReactElement, ReactNode, SyntheticEvent, useState } from "react";
import { useTranslation } from "react-i18next";
import { useSelector } from "react-redux";
import { Header, Icon, Popup, SemanticICONS } from "semantic-ui-react";
import {
    AppConstants,
    AppState,
    FeatureConfigInterface,
    UIConstants,
    getEmptyPlaceholderIllustrations,
    history
} from "../../../features/core";
import { GroupConstants } from "../../../features/groups/constants";
import { GroupsInterface } from "../../../features/groups/models";
import { CONSUMER_USERSTORE } from "../users/constants";

interface GroupListProps extends SBACInterface<FeatureConfigInterface>,
    LoadableComponentInterface, TestableComponentInterface {

    /**
     * Advanced Search component.
     */
    advancedSearch?: ReactNode;
    /**
     * Default list item limit.
     */
    defaultListItemLimit?: number;
    /**
     * Groups list.
     */
    groupList: GroupsInterface[];
    /**
     * Group delete callback.
     * @param group - Deleting group.
     */
    handleGroupDelete?: (group: GroupsInterface) => void;
    /**
     * On list item select callback.
     */
    onListItemClick?: (event: SyntheticEvent, group: GroupsInterface) => void;
    /**
     * Callback for the search query clear action.
     */
    onSearchQueryClear?: () => void;
    /**
     * Callback to be fired when clicked on the empty list placeholder action.
     */
    onEmptyListPlaceholderActionClick?: () => void;
    /**
     * Search query for the list.
     */
    searchQuery?: string;
    /**
     * Enable selection styles.
     */
    selection?: boolean;
    /**
     * Show list item actions.
     */
    showListItemActions?: boolean;
    /**
     * Show/Hide meta content.
     */
    showMetaContent?: boolean;
    /**
     * List of readOnly user stores.
     */
    readOnlyUserStores?: string[];
    /**
     * Selected user-store from the dropdown
     */
    selectedUserStoreOption?: string;
}

/**
 * List component for Group Management list
 *
 * @param props - contains the role list as a prop to populate
 */
export const GroupList: React.FunctionComponent<GroupListProps> = (props: GroupListProps): ReactElement => {

    const {
        advancedSearch,
        defaultListItemLimit,
        handleGroupDelete,
        isLoading,
        readOnlyUserStores,
        featureConfig,
        onEmptyListPlaceholderActionClick,
        onListItemClick,
        onSearchQueryClear,
        groupList,
        selection,
        searchQuery,
        showListItemActions,
        selectedUserStoreOption,
        [ "data-testid" ]: testId
    } = props;

    const { t } = useTranslation();

    const allowedScopes: string = useSelector((state: AppState) => state?.auth?.allowedScopes);

    const [ showGroupDeleteConfirmation, setShowDeleteConfirmationModal ] = useState<boolean>(false);
    const [ currentDeletedGroup, setCurrentDeletedGroup ] = useState<GroupsInterface>();

    const handleGroupEdit = (groupId: string) => {
        history.push(AppConstants.getPaths().get("GROUP_EDIT").replace(":id", groupId));
    };

    /**
     * Shows list placeholders.
     */
    const showPlaceholders = (): ReactElement => {
        // When the search returns empty.
        if (searchQuery && groupList?.length === 0) {
            return (
                <EmptyPlaceholder
                    data-testid={ `${ testId }-search-empty-placeholder` }
                    action={ (
                        <LinkButton
                            data-testid={ `${ testId }-search-empty-placeholder-clear-button` }
                            onClick={ onSearchQueryClear }
                        >
                            { t("console:manage.features.roles.list.emptyPlaceholders.search.action") }
                        </LinkButton>
                    ) }
                    image={ getEmptyPlaceholderIllustrations().emptySearch }
                    imageSize="tiny"
                    title={ t("console:manage.features.roles.list.emptyPlaceholders.search.title") }
                    subtitle={ [
                        t("console:manage.features.roles.list.emptyPlaceholders.search.subtitles.0",
                            { searchQuery: searchQuery }),
                        t("console:manage.features.roles.list.emptyPlaceholders.search.subtitles.1")
                    ] }
                />
            );
        }

        if (groupList?.length === 0) {
            if (hasRequiredScopes(featureConfig?.groups, featureConfig?.groups?.scopes?.create, allowedScopes)) {
                return (
                    <EmptyPlaceholder
                        data-testid={ `${ testId }-empty-list-empty-placeholder` }
                        action={ (selectedUserStoreOption === CONSUMER_USERSTORE
                            || selectedUserStoreOption === GroupConstants.ALL_GROUPS) 
                            && (
                                <PrimaryButton
                                    data-testid={ `${ testId }-empty-list-empty-placeholder-add-button` }
                                    onClick={ onEmptyListPlaceholderActionClick }
                                >
                                    <Icon name="add"/>
                                    { t("console:manage.features.roles.list.emptyPlaceholders.emptyRoleList.action",
                                        { type: "Group" }) }
                                </PrimaryButton>
                            ) 
                        }
                        image={ getEmptyPlaceholderIllustrations().newList }
                        imageSize="tiny"
                        title={ "No groups available" }
                        subtitle={ [
                            t("console:manage.features.roles.list.emptyPlaceholders.emptyRoleList.subtitles.0",
                                { type: "groups" })
                        ] }
                    />
                );
            } else {
                return (
                    <EmptyPlaceholder
                        data-testid={ `${ testId }-empty-list-empty-placeholder` }
                        image={ getEmptyPlaceholderIllustrations().newList }
                        imageSize="tiny"
                        title={ "No groups available" }
                        subtitle={ [
                            t("console:manage.features.roles.list.emptyPlaceholders.emptyRoleList.subtitles.0",
                                { type: "groups" })
                        ] }
                    />
                );
            }
        }

        return null;
    };

    /**
     * Resolves data table columns.
     */
    const resolveTableColumns = (): TableColumnInterface[] => {
        return [
            {
                allowToggleVisibility: false,
                dataIndex: "name",
                id: "name",
                key: "name",
                render: (group: GroupsInterface): ReactNode => (
                    <Header
                        image
                        as="h6"
                        className="header-with-icon"
                        data-testid={ `${ testId }-item-heading` }
                    >
                        <AppAvatar
                            image={ (
                                <AnimatedAvatar
                                    name={ group?.displayName?.split("/")[1] }
                                    size="mini"
                                    data-testid={ `${ testId }-item-image-inner` }
                                />
                            ) }
                            size="mini"
                            spaced="right"
                            data-testid={ `${ testId }-item-image` }
                        />
                        <Header.Content>
                            <div className="mt-1">{ group?.displayName?.split("/")[1] } </div>
                        </Header.Content>
                    </Header>
                ),
                title: t("console:manage.features.groups.list.columns.name")
            },
            {
                allowToggleVisibility: false,
                dataIndex: "type",
                id: "type",
                key: "type",
                render: (group: GroupsInterface): ReactNode => {
                    const grpName: string = resolveUserstore(group.displayName);

                    if (grpName === CONSUMER_USERSTORE) {
                        return CONSUMER_USERSTORE;
                    }

                    return grpName.toUpperCase();
                },
                title: (
                    <>
                        { t("console:manage.features.groups.list.columns.source") }
                        <Popup
                            trigger={ (
                                <div className="inline" >
                                    <Icon disabled name="info circle" className="link pointing pl-1" />
                                </div>
                            ) }
                            content="Where group is managed."
                            position="top center"
                            size="mini"
                            hideOnScroll
                            inverted
                        />
                    </>
                )
            },
            {
                allowToggleVisibility: false,
                dataIndex: "action",
                id: "actions",
                key: "actions",
                textAlign: "right",
                title: null
            }
        ];
    };

    /**
     * Resolves data table actions.
     */
    const resolveTableActions = (): TableActionsInterface[] => {
        if (!showListItemActions) {
            return;
        }

        const actions: TableActionsInterface[] = [
            {
                hidden: (): boolean => !isFeatureEnabled(featureConfig?.groups,
                    GroupConstants.FEATURE_DICTIONARY.get("GROUP_READ")) ||
                        !hasRequiredScopes(featureConfig?.groups,
                            featureConfig?.groups?.scopes?.create, allowedScopes),
                icon: (group: GroupsInterface): SemanticICONS => {
                    const userStore = group?.displayName?.split("/").length > 1
                        ? group?.displayName?.split("/")[0]
                        : "PRIMARY";

                    return !isFeatureEnabled(featureConfig?.groups,
                        GroupConstants.FEATURE_DICTIONARY.get("GROUP_UPDATE"))
                    || readOnlyUserStores?.includes(userStore.toString())
                        ? "eye"
                        : "pencil alternate";
                },
                onClick: (e: SyntheticEvent, group: GroupsInterface): void =>
                    handleGroupEdit(group.id),
                popupText: (group: GroupsInterface): string => {
                    const userStore = group?.displayName?.split("/").length > 1
                        ? group?.displayName?.split("/")[0]
                        : "PRIMARY";

                    return !isFeatureEnabled(featureConfig?.groups,
                        GroupConstants.FEATURE_DICTIONARY.get("GROUP_UPDATE"))
                    || readOnlyUserStores?.includes(userStore.toString())
                        ? t("common:view")
                        : t("common:edit");
                },
                renderer: "semantic-icon"
            }
        ];

        actions.push({
            hidden: (group: GroupsInterface): boolean => {
                const userStore = group?.displayName?.split("/").length > 1
                    ? group?.displayName?.split("/")[0]
                    : "PRIMARY";

                return !hasRequiredScopes(featureConfig?.groups, featureConfig?.groups?.scopes?.delete, allowedScopes)
                    || readOnlyUserStores?.includes(userStore.toString());
            },
            icon: (): SemanticICONS => "trash alternate",
            onClick: (e: SyntheticEvent, group: GroupsInterface): void => {
                setCurrentDeletedGroup(group);
                setShowDeleteConfirmationModal(!showGroupDeleteConfirmation);
            },
            popupText: (): string => t("console:manage.features.roles.list.popups.delete", { type: "Group" }),
            renderer: "semantic-icon"
        });

        return actions;
    };

    return (
        <>
            { !isLoading 
                ? (
                    <DataTable<GroupsInterface>
                        showHeader
                        className="groups-list"
                        externalSearch={ advancedSearch }
                        isLoading={ isLoading }
                        loadingStateOptions={ {
                            count: defaultListItemLimit ?? UIConstants.DEFAULT_RESOURCE_LIST_ITEM_LIMIT,
                            imageType: "square"
                        } }
                        actions={ resolveTableActions() }
                        columns={ resolveTableColumns() }
                        data={ groupList }
                        onRowClick={
                            (e: SyntheticEvent, group: GroupsInterface): void => {
                                !hasRequiredScopes(featureConfig?.groups,
                                    featureConfig?.groups?.scopes?.create, allowedScopes) ?
                                    null :
                                    handleGroupEdit(group?.id);
                                onListItemClick(e, group);
                            }
                        }
                        placeholders={ showPlaceholders() }
                        selectable={ selection }
                        transparent={ !isLoading && (showPlaceholders() !== null) }
                        data-testid={ testId }
                    />
                ) : (
                    <EmphasizedSegment padded>
                        <ContentLoader inline="centered" active/>
                    </EmphasizedSegment>
                )
            }
            {
                showGroupDeleteConfirmation &&
                    (
                        <ConfirmationModal
                            data-testid={ `${ testId }-delete-item-confirmation-modal` }
                            onClose={ (): void => setShowDeleteConfirmationModal(false) }
                            type="negative"
                            open={ showGroupDeleteConfirmation }
                            assertionHint={ t("console:manage.features.roles.list.confirmations" +
                                ".deleteItem.assertionHint") }
                            assertionType="checkbox"
                            primaryAction="Confirm"
                            secondaryAction="Cancel"
                            onSecondaryActionClick={ (): void => setShowDeleteConfirmationModal(false) }
                            onPrimaryActionClick={ (): void => {
                                handleGroupDelete(currentDeletedGroup);
                                setShowDeleteConfirmationModal(false);
                            } }
                            closeOnDimmerClick={ false }
                        >
                            <ConfirmationModal.Header>
                                { t("console:manage.features.roles.list.confirmations.deleteItem.header") }
                            </ConfirmationModal.Header>
                            <ConfirmationModal.Message attached negative>
                                { t("console:manage.features.roles.list.confirmations.deleteItem.message",
                                    { type: "group" }) }
                            </ConfirmationModal.Message>
                            <ConfirmationModal.Content>
                                { t("console:manage.features.roles.list.confirmations.deleteItem.content",
                                    { type: "group" }) }
                            </ConfirmationModal.Content>
                        </ConfirmationModal>
                    ) 
            }
        </>
    );
};

/**
 * Default props for the component.
 */
GroupList.defaultProps = {
    selection: true,
    showListItemActions: true,
    showMetaContent: true
};
