/*
Copyright 2019 - 2022 The Matrix.org Foundation C.I.C.

Licensed 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 React from 'react';
import { sleep } from "matrix-js-sdk/src/utils";
import { Room, RoomEvent } from "matrix-js-sdk/src/models/room";
import { logger } from "matrix-js-sdk/src/logger";

import { _t } from "../../../../../languageHandler";
import { MatrixClientPeg } from "../../../../../MatrixClientPeg";
import AccessibleButton from "../../../elements/AccessibleButton";
import dis from "../../../../../dispatcher/dispatcher";
import { SettingLevel } from "../../../../../settings/SettingLevel";
import SecureBackupPanel from "../../SecureBackupPanel";
import SettingsStore from "../../../../../settings/SettingsStore";
import { UIFeature } from "../../../../../settings/UIFeature";
import E2eAdvancedPanel, { isE2eAdvancedPanelPossible } from "../../E2eAdvancedPanel";
import { ActionPayload } from "../../../../../dispatcher/payloads";
import CryptographyPanel from "../../CryptographyPanel";
import DevicesPanel from "../../DevicesPanel";
import SettingsFlag from "../../../elements/SettingsFlag";
import CrossSigningPanel from "../../CrossSigningPanel";
import EventIndexPanel from "../../EventIndexPanel";
import InlineSpinner from "../../../elements/InlineSpinner";
import { PosthogAnalytics } from "../../../../../PosthogAnalytics";
import { showDialog as showAnalyticsLearnMoreDialog } from "../../../dialogs/AnalyticsLearnMoreDialog";
import { privateShouldBeEncrypted } from "../../../../../utils/rooms";

interface IIgnoredUserProps {
    userId: string;
    onUnignored: (userId: string) => void;
    inProgress: boolean;
}

export class IgnoredUser extends React.Component<IIgnoredUserProps> {
    private onUnignoreClicked = (): void => {
        this.props.onUnignored(this.props.userId);
    };

    public render(): JSX.Element {
        const id = `mx_SecurityUserSettingsTab_ignoredUser_${this.props.userId}`;
        return (
            <div className='mx_SecurityUserSettingsTab_ignoredUser'>
                <AccessibleButton onClick={this.onUnignoreClicked} kind='primary_sm' aria-describedby={id} disabled={this.props.inProgress}>
                    { _t('Unignore') }
                </AccessibleButton>
                <span id={id}>{ this.props.userId }</span>
            </div>
        );
    }
}

interface IProps {
    closeSettingsFn: () => void;
}

interface IState {
    ignoredUserIds: string[];
    waitingUnignored: string[];
    managingInvites: boolean;
    invitedRoomIds: Set<string>;
}

export default class SecurityUserSettingsTab extends React.Component<IProps, IState> {
    private dispatcherRef: string;

    constructor(props: IProps) {
        super(props);

        // Get rooms we're invited to
        const invitedRoomIds = new Set(this.getInvitedRooms().map(room => room.roomId));

        this.state = {
            ignoredUserIds: MatrixClientPeg.get().getIgnoredUsers(),
            waitingUnignored: [],
            managingInvites: false,
            invitedRoomIds,
        };
    }

    private onAction = ({ action }: ActionPayload) => {
        if (action === "ignore_state_changed") {
            const ignoredUserIds = MatrixClientPeg.get().getIgnoredUsers();
            const newWaitingUnignored = this.state.waitingUnignored.filter(e => ignoredUserIds.includes(e));
            this.setState({ ignoredUserIds, waitingUnignored: newWaitingUnignored });
        }
    };

    public componentDidMount(): void {
        this.dispatcherRef = dis.register(this.onAction);
        MatrixClientPeg.get().on(RoomEvent.MyMembership, this.onMyMembership);
    }

    public componentWillUnmount(): void {
        dis.unregister(this.dispatcherRef);
        MatrixClientPeg.get().removeListener(RoomEvent.MyMembership, this.onMyMembership);
    }

    private onMyMembership = (room: Room, membership: string): void => {
        if (room.isSpaceRoom()) {
            return;
        }

        if (membership === "invite") {
            this.addInvitedRoom(room);
        } else if (this.state.invitedRoomIds.has(room.roomId)) {
            // The user isn't invited anymore
            this.removeInvitedRoom(room.roomId);
        }
    };

    private addInvitedRoom = (room: Room): void => {
        this.setState(({ invitedRoomIds }) => ({
            invitedRoomIds: new Set(invitedRoomIds).add(room.roomId),
        }));
    };

    private removeInvitedRoom = (roomId: string): void => {
        this.setState(({ invitedRoomIds }) => {
            const newInvitedRoomIds = new Set(invitedRoomIds);
            newInvitedRoomIds.delete(roomId);

            return {
                invitedRoomIds: newInvitedRoomIds,
            };
        });
    };

    private onUserUnignored = async (userId: string): Promise<void> => {
        const { ignoredUserIds, waitingUnignored } = this.state;
        const currentlyIgnoredUserIds = ignoredUserIds.filter(e => !waitingUnignored.includes(e));

        const index = currentlyIgnoredUserIds.indexOf(userId);
        if (index !== -1) {
            currentlyIgnoredUserIds.splice(index, 1);
            this.setState(({ waitingUnignored }) => ({ waitingUnignored: [...waitingUnignored, userId] }));
            MatrixClientPeg.get().setIgnoredUsers(currentlyIgnoredUserIds);
        }
    };

    private getInvitedRooms = (): Room[] => {
        return MatrixClientPeg.get().getRooms().filter((r) => {
            return r.hasMembershipState(MatrixClientPeg.get().getUserId(), "invite");
        });
    };

    private manageInvites = async (accept: boolean): Promise<void> => {
        this.setState({
            managingInvites: true,
        });

        // iterate with a normal for loop in order to retry on action failure
        const invitedRoomIdsValues = Array.from(this.state.invitedRoomIds);

        // Execute all acceptances/rejections sequentially
        const cli = MatrixClientPeg.get();
        const action = accept ? cli.joinRoom.bind(cli) : cli.leave.bind(cli);
        for (let i = 0; i < invitedRoomIdsValues.length; i++) {
            const roomId = invitedRoomIdsValues[i];

            // Accept/reject invite
            await action(roomId).then(() => {
                // No error, update invited rooms button
                this.removeInvitedRoom(roomId);
            }, async (e) => {
                // Action failure
                if (e.errcode === "M_LIMIT_EXCEEDED") {
                    // Add a delay between each invite change in order to avoid rate
                    // limiting by the server.
                    await sleep(e.retry_after_ms || 2500);

                    // Redo last action
                    i--;
                } else {
                    // Print out error with joining/leaving room
                    logger.warn(e);
                }
            });
        }

        this.setState({
            managingInvites: false,
        });
    };

    private onAcceptAllInvitesClicked = (): void => {
        this.manageInvites(true);
    };

    private onRejectAllInvitesClicked = (): void => {
        this.manageInvites(false);
    };

    private renderIgnoredUsers(): JSX.Element {
        const { waitingUnignored, ignoredUserIds } = this.state;

        const userIds = !ignoredUserIds?.length
            ? _t('You have no ignored users.')
            : ignoredUserIds.map((u) => {
                return (
                    <IgnoredUser
                        userId={u}
                        onUnignored={this.onUserUnignored}
                        key={u}
                        inProgress={waitingUnignored.includes(u)}
                    />
                );
            });

        return (
            <div className='mx_SettingsTab_section'>
                <span className='mx_SettingsTab_subheading'>{ _t('Ignored users') }</span>
                <div className='mx_SettingsTab_subsectionText'>
                    { userIds }
                </div>
            </div>
        );
    }

    private renderManageInvites(): JSX.Element {
        const { invitedRoomIds } = this.state;

        if (invitedRoomIds.size === 0) {
            return null;
        }

        return (
            <div className='mx_SettingsTab_section mx_SecurityUserSettingsTab_bulkOptions'>
                <span className='mx_SettingsTab_subheading'>{ _t('Bulk options') }</span>
                <AccessibleButton onClick={this.onAcceptAllInvitesClicked} kind='primary' disabled={this.state.managingInvites}>
                    { _t("Accept all %(invitedRooms)s invites", { invitedRooms: invitedRoomIds.size }) }
                </AccessibleButton>
                <AccessibleButton onClick={this.onRejectAllInvitesClicked} kind='danger' disabled={this.state.managingInvites}>
                    { _t("Reject all %(invitedRooms)s invites", { invitedRooms: invitedRoomIds.size }) }
                </AccessibleButton>
                { this.state.managingInvites ? <InlineSpinner /> : <div /> }
            </div>
        );
    }

    public render(): JSX.Element {
        const secureBackup = (
            <div className='mx_SettingsTab_section'>
                <span className="mx_SettingsTab_subheading">{ _t("Secure Backup") }</span>
                <div className='mx_SettingsTab_subsectionText'>
                    <SecureBackupPanel />
                </div>
            </div>
        );

        const eventIndex = (
            <div className="mx_SettingsTab_section">
                <span className="mx_SettingsTab_subheading">{ _t("Message search") }</span>
                <EventIndexPanel />
            </div>
        );

        // XXX: There's no such panel in the current cross-signing designs, but
        // it's useful to have for testing the feature. If there's no interest
        // in having advanced details here once all flows are implemented, we
        // can remove this.
        const crossSigning = (
            <div className='mx_SettingsTab_section'>
                <span className="mx_SettingsTab_subheading">{ _t("Cross-signing") }</span>
                <div className='mx_SettingsTab_subsectionText'>
                    <CrossSigningPanel />
                </div>
            </div>
        );

        let warning;
        if (!privateShouldBeEncrypted()) {
            warning = <div className="mx_SecurityUserSettingsTab_warning">
                { _t("Your server admin has disabled end-to-end encryption by default " +
                    "in private rooms & Direct Messages.") }
            </div>;
        }

        let privacySection;
        if (PosthogAnalytics.instance.isEnabled()) {
            const onClickAnalyticsLearnMore = () => {
                showAnalyticsLearnMoreDialog({
                    primaryButton: _t("Okay"),
                    hasCancel: false,
                });
            };
            privacySection = <React.Fragment>
                <div className="mx_SettingsTab_heading">{ _t("Privacy") }</div>
                <div className="mx_SettingsTab_section">
                    <span className="mx_SettingsTab_subheading">{ _t("Analytics") }</span>
                    <div className="mx_SettingsTab_subsectionText">
                        <p>
                            { _t("Share anonymous data to help us identify issues. Nothing personal. " +
                                 "No third parties.") }
                        </p>
                        <p>
                            <AccessibleButton className="mx_SettingsTab_linkBtn" onClick={onClickAnalyticsLearnMore}>
                                { _t("Learn more") }
                            </AccessibleButton>
                        </p>
                    </div>
                    { PosthogAnalytics.instance.isEnabled() && (
                        <SettingsFlag
                            name="pseudonymousAnalyticsOptIn"
                            level={SettingLevel.ACCOUNT} />
                    ) }
                </div>
            </React.Fragment>;
        }

        let advancedSection;
        if (SettingsStore.getValue(UIFeature.AdvancedSettings)) {
            const ignoreUsersPanel = this.renderIgnoredUsers();
            const invitesPanel = this.renderManageInvites();
            const e2ePanel = isE2eAdvancedPanelPossible() ? <E2eAdvancedPanel /> : null;
            // only show the section if there's something to show
            if (ignoreUsersPanel || invitesPanel || e2ePanel) {
                advancedSection = <>
                    <div className="mx_SettingsTab_heading">{ _t("Advanced") }</div>
                    <div className="mx_SettingsTab_section">
                        { ignoreUsersPanel }
                        { invitesPanel }
                        { e2ePanel }
                    </div>
                </>;
            }
        }

        return (
            <div className="mx_SettingsTab mx_SecurityUserSettingsTab">
                { warning }
                <div className="mx_SettingsTab_heading">{ _t("Where you're signed in") }</div>
                <div className="mx_SettingsTab_section">
                    <span className="mx_SettingsTab_subsectionText">
                        { _t(
                            "Manage your signed-in devices below. " +
                            "A device's name is visible to people you communicate with.",
                        ) }
                    </span>
                    <DevicesPanel />
                </div>
                <div className="mx_SettingsTab_heading">{ _t("Encryption") }</div>
                <div className="mx_SettingsTab_section">
                    { secureBackup }
                    { eventIndex }
                    { crossSigning }
                    <CryptographyPanel />
                </div>
                { privacySection }
                { advancedSection }
            </div>
        );
    }
}
