/*
Copyright 2019 Michael Telatynski <7t3chguy@gmail.com>
Copyright 2015 - 2021 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 { EventStatus, MatrixEvent } from 'matrix-js-sdk/src/models/event';
import { EventType, RelationType } from "matrix-js-sdk/src/@types/event";

import { MatrixClientPeg } from '../../../MatrixClientPeg';
import dis from '../../../dispatcher/dispatcher';
import { _t } from '../../../languageHandler';
import Modal from '../../../Modal';
import Resend from '../../../Resend';
import SettingsStore from '../../../settings/SettingsStore';
import { isUrlPermitted } from '../../../HtmlUtils';
import { isContentActionable } from '../../../utils/EventUtils';
import IconizedContextMenu, { IconizedContextMenuOption, IconizedContextMenuOptionList } from './IconizedContextMenu';
import { replaceableComponent } from "../../../utils/replaceableComponent";
import { ReadPinsEventId } from "../right_panel/PinnedMessagesCard";
import ForwardDialog from "../dialogs/ForwardDialog";
import { Action } from "../../../dispatcher/actions";
import ReportEventDialog from '../dialogs/ReportEventDialog';
import ViewSource from '../../structures/ViewSource';
import { createRedactEventDialog } from '../dialogs/ConfirmRedactDialog';
import ShareDialog from '../dialogs/ShareDialog';
import { RoomPermalinkCreator } from "../../../utils/permalinks/Permalinks";
import { IPosition, ChevronFace } from '../../structures/ContextMenu';

export function canCancel(eventStatus: EventStatus): boolean {
    return eventStatus === EventStatus.QUEUED || eventStatus === EventStatus.NOT_SENT;
}

export interface IEventTileOps {
    isWidgetHidden(): boolean;
    unhideWidget(): void;
}

export interface IOperableEventTile {
    getEventTileOps(): IEventTileOps;
}

interface IProps extends IPosition {
    chevronFace: ChevronFace;
    /* the MatrixEvent associated with the context menu */
    mxEvent: MatrixEvent;
    /* an optional EventTileOps implementation that can be used to unhide preview widgets */
    eventTileOps?: IEventTileOps;
    permalinkCreator?: RoomPermalinkCreator;
    /* an optional function to be called when the user clicks collapse thread, if not provided hide button */
    collapseReplyThread?(): void;
    /* callback called when the menu is dismissed */
    onFinished(): void;
    /* if the menu is inside a dialog, we sometimes need to close that dialog after click (forwarding) */
    onCloseDialog?(): void;
}

interface IState {
    canRedact: boolean;
    canPin: boolean;
}

@replaceableComponent("views.context_menus.MessageContextMenu")
export default class MessageContextMenu extends React.Component<IProps, IState> {
    state = {
        canRedact: false,
        canPin: false,
    };

    componentDidMount() {
        MatrixClientPeg.get().on('RoomMember.powerLevel', this.checkPermissions);
        this.checkPermissions();
    }

    componentWillUnmount() {
        const cli = MatrixClientPeg.get();
        if (cli) {
            cli.removeListener('RoomMember.powerLevel', this.checkPermissions);
        }
    }

    private checkPermissions = (): void => {
        const cli = MatrixClientPeg.get();
        const room = cli.getRoom(this.props.mxEvent.getRoomId());

        // We explicitly decline to show the redact option on ACL events as it has a potential
        // to obliterate the room - https://github.com/matrix-org/synapse/issues/4042
        // Similarly for encryption events, since redacting them "breaks everything"
        const canRedact = room.currentState.maySendRedactionForEvent(this.props.mxEvent, cli.credentials.userId)
            && this.props.mxEvent.getType() !== EventType.RoomServerAcl
            && this.props.mxEvent.getType() !== EventType.RoomEncryption;
        let canPin = room.currentState.mayClientSendStateEvent(EventType.RoomPinnedEvents, cli);

        // HACK: Intentionally say we can't pin if the user doesn't want to use the functionality
        if (!SettingsStore.getValue("feature_pinning")) canPin = false;

        this.setState({ canRedact, canPin });
    };

    private isPinned(): boolean {
        const room = MatrixClientPeg.get().getRoom(this.props.mxEvent.getRoomId());
        const pinnedEvent = room.currentState.getStateEvents(EventType.RoomPinnedEvents, '');
        if (!pinnedEvent) return false;
        const content = pinnedEvent.getContent();
        return content.pinned && Array.isArray(content.pinned) && content.pinned.includes(this.props.mxEvent.getId());
    }

    private onResendReactionsClick = (): void => {
        for (const reaction of this.getUnsentReactions()) {
            Resend.resend(reaction);
        }
        this.closeMenu();
    };

    private onReportEventClick = (): void => {
        Modal.createTrackedDialog('Report Event', '', ReportEventDialog, {
            mxEvent: this.props.mxEvent,
        }, 'mx_Dialog_reportEvent');
        this.closeMenu();
    };

    private onViewSourceClick = (): void => {
        Modal.createTrackedDialog('View Event Source', '', ViewSource, {
            mxEvent: this.props.mxEvent,
        }, 'mx_Dialog_viewsource');
        this.closeMenu();
    };

    private onRedactClick = (): void => {
        const { mxEvent, onCloseDialog } = this.props;
        createRedactEventDialog({
            mxEvent,
            onCloseDialog,
        });
        this.closeMenu();
    };

    private onForwardClick = (): void => {
        Modal.createTrackedDialog('Forward Message', '', ForwardDialog, {
            matrixClient: MatrixClientPeg.get(),
            event: this.props.mxEvent,
            permalinkCreator: this.props.permalinkCreator,
        });
        this.closeMenu();
    };

    private onPinClick = (): void => {
        const cli = MatrixClientPeg.get();
        const room = cli.getRoom(this.props.mxEvent.getRoomId());
        const eventId = this.props.mxEvent.getId();

        const pinnedIds = room?.currentState?.getStateEvents(EventType.RoomPinnedEvents, "")?.getContent().pinned || [];
        if (pinnedIds.includes(eventId)) {
            pinnedIds.splice(pinnedIds.indexOf(eventId), 1);
        } else {
            pinnedIds.push(eventId);
            cli.setRoomAccountData(room.roomId, ReadPinsEventId, {
                event_ids: [
                    ...(room.getAccountData(ReadPinsEventId)?.getContent()?.event_ids || []),
                    eventId,
                ],
            });
        }
        cli.sendStateEvent(this.props.mxEvent.getRoomId(), EventType.RoomPinnedEvents, { pinned: pinnedIds }, "");
        this.closeMenu();
    };

    private closeMenu = (): void => {
        this.props.onFinished();
    };

    private onUnhidePreviewClick = (): void => {
        this.props.eventTileOps?.unhideWidget();
        this.closeMenu();
    };

    private onQuoteClick = (): void => {
        dis.dispatch({
            action: Action.ComposerInsert,
            event: this.props.mxEvent,
        });
        this.closeMenu();
    };

    private onPermalinkClick = (e: React.MouseEvent): void => {
        e.preventDefault();
        Modal.createTrackedDialog('share room message dialog', '', ShareDialog, {
            target: this.props.mxEvent,
            permalinkCreator: this.props.permalinkCreator,
        });
        this.closeMenu();
    };

    private onCollapseReplyThreadClick = (): void => {
        this.props.collapseReplyThread();
        this.closeMenu();
    };

    private getReactions(filter: (e: MatrixEvent) => boolean): MatrixEvent[] {
        const cli = MatrixClientPeg.get();
        const room = cli.getRoom(this.props.mxEvent.getRoomId());
        const eventId = this.props.mxEvent.getId();
        return room.getPendingEvents().filter(e => {
            const relation = e.getRelation();
            return relation?.rel_type === RelationType.Annotation && relation.event_id === eventId && filter(e);
        });
    }

    private getPendingReactions(): MatrixEvent[] {
        return this.getReactions(e => canCancel(e.status));
    }

    private getUnsentReactions(): MatrixEvent[] {
        return this.getReactions(e => e.status === EventStatus.NOT_SENT);
    }

    render() {
        const cli = MatrixClientPeg.get();
        const me = cli.getUserId();
        const mxEvent = this.props.mxEvent;
        const eventStatus = mxEvent.status;
        const unsentReactionsCount = this.getUnsentReactions().length;

        let resendReactionsButton: JSX.Element;
        let redactButton: JSX.Element;
        let forwardButton: JSX.Element;
        let pinButton: JSX.Element;
        let unhidePreviewButton: JSX.Element;
        let externalURLButton: JSX.Element;
        let quoteButton: JSX.Element;
        let collapseReplyThread: JSX.Element;
        let redactItemList: JSX.Element;

        // status is SENT before remote-echo, null after
        const isSent = !eventStatus || eventStatus === EventStatus.SENT;
        if (!mxEvent.isRedacted()) {
            if (unsentReactionsCount !== 0) {
                resendReactionsButton = (
                    <IconizedContextMenuOption
                        iconClassName="mx_MessageContextMenu_iconResend"
                        label={_t('Resend %(unsentCount)s reaction(s)', { unsentCount: unsentReactionsCount })}
                        onClick={this.onResendReactionsClick}
                    />
                );
            }
        }

        if (isSent && this.state.canRedact) {
            redactButton = (
                <IconizedContextMenuOption
                    iconClassName="mx_MessageContextMenu_iconRedact"
                    label={_t("Remove")}
                    onClick={this.onRedactClick}
                />
            );
        }

        if (isContentActionable(mxEvent)) {
            forwardButton = (
                <IconizedContextMenuOption
                    iconClassName="mx_MessageContextMenu_iconForward"
                    label={_t("Forward")}
                    onClick={this.onForwardClick}
                />
            );

            if (this.state.canPin) {
                pinButton = (
                    <IconizedContextMenuOption
                        iconClassName="mx_MessageContextMenu_iconPin"
                        label={this.isPinned() ? _t('Unpin') : _t('Pin')}
                        onClick={this.onPinClick}
                    />
                );
            }
        }

        const viewSourceButton = (
            <IconizedContextMenuOption
                iconClassName="mx_MessageContextMenu_iconSource"
                label={_t("View source")}
                onClick={this.onViewSourceClick}
            />
        );

        if (this.props.eventTileOps) {
            if (this.props.eventTileOps.isWidgetHidden()) {
                unhidePreviewButton = (
                    <IconizedContextMenuOption
                        iconClassName="mx_MessageContextMenu_iconUnhidePreview"
                        label={_t("Show preview")}
                        onClick={this.onUnhidePreviewClick}
                    />
                );
            }
        }

        let permalink;
        if (this.props.permalinkCreator) {
            permalink = this.props.permalinkCreator.forEvent(this.props.mxEvent.getId());
        }
        const permalinkButton = (
            <IconizedContextMenuOption
                iconClassName="mx_MessageContextMenu_iconPermalink"
                onClick={this.onPermalinkClick}
                label={_t('Share')}
                element="a"
                {
                    // XXX: Typescript signature for AccessibleButton doesn't work properly for non-inputs like `a`
                    ...{
                        href: permalink,
                        target: "_blank",
                        rel: "noreferrer noopener",
                    }
                }
            />
        );

        if (this.props.eventTileOps) { // this event is rendered using TextualBody
            quoteButton = (
                <IconizedContextMenuOption
                    iconClassName="mx_MessageContextMenu_iconQuote"
                    label={_t("Quote")}
                    onClick={this.onQuoteClick}
                />
            );
        }

        // Bridges can provide a 'external_url' to link back to the source.
        if (typeof (mxEvent.getContent().external_url) === "string" &&
            isUrlPermitted(mxEvent.getContent().external_url)
        ) {
            externalURLButton = (
                <IconizedContextMenuOption
                    iconClassName="mx_MessageContextMenu_iconLink"
                    onClick={this.closeMenu}
                    label={_t('Source URL')}
                    element="a"
                    {
                        // XXX: Typescript signature for AccessibleButton doesn't work properly for non-inputs like `a`
                        ...{
                            target: "_blank",
                            rel: "noreferrer noopener",
                            href: mxEvent.getContent().external_url,
                        }
                    }
                />
            );
        }

        if (this.props.collapseReplyThread) {
            collapseReplyThread = (
                <IconizedContextMenuOption
                    iconClassName="mx_MessageContextMenu_iconCollapse"
                    label={_t("Collapse reply thread")}
                    onClick={this.onCollapseReplyThreadClick}
                />
            );
        }

        let reportEventButton: JSX.Element;
        if (mxEvent.getSender() !== me) {
            reportEventButton = (
                <IconizedContextMenuOption
                    iconClassName="mx_MessageContextMenu_iconReport"
                    label={_t("Report")}
                    onClick={this.onReportEventClick}
                />
            );
        }

        const commonItemsList = (
            <IconizedContextMenuOptionList>
                { quoteButton }
                { forwardButton }
                { pinButton }
                { permalinkButton }
                { reportEventButton }
                { externalURLButton }
                { unhidePreviewButton }
                { viewSourceButton }
                { resendReactionsButton }
                { collapseReplyThread }
            </IconizedContextMenuOptionList>
        );

        if (redactButton) {
            redactItemList = (
                <IconizedContextMenuOptionList red>
                    { redactButton }
                </IconizedContextMenuOptionList>
            );
        }

        return (
            <IconizedContextMenu
                {...this.props}
                className="mx_MessageContextMenu"
                compact={true}
            >
                { commonItemsList }
                { redactItemList }
            </IconizedContextMenu>
        );
    }
}
