/*
Copyright 2019 - 2023 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, { createRef, KeyboardEvent, SyntheticEvent } from "react";
import EMOJI_REGEX from "emojibase-regex";
import {
    IContent,
    MatrixEvent,
    IEventRelation,
    IMentions,
    Room,
    EventType,
    MsgType,
    RelationType,
    THREAD_RELATION_TYPE,
} from "matrix-js-sdk/src/matrix";
import { DebouncedFunc, throttle } from "lodash";
import { logger } from "matrix-js-sdk/src/logger";
import { Composer as ComposerEvent } from "@matrix-org/analytics-events/types/typescript/Composer";

import dis from "../../../dispatcher/dispatcher";
import EditorModel from "../../../editor/model";
import {
    containsEmote,
    htmlSerializeIfNeeded,
    startsWith,
    stripEmoteCommand,
    stripPrefix,
    textSerialize,
    unescapeMessage,
} from "../../../editor/serialize";
import BasicMessageComposer, { REGEX_EMOTICON } from "./BasicMessageComposer";
import { CommandPartCreator, Part, PartCreator, SerializedPart, Type } from "../../../editor/parts";
import { findEditableEvent } from "../../../utils/EventUtils";
import SendHistoryManager from "../../../SendHistoryManager";
import { CommandCategories } from "../../../SlashCommands";
import ContentMessages from "../../../ContentMessages";
import { withMatrixClientHOC, MatrixClientProps } from "../../../contexts/MatrixClientContext";
import { Action } from "../../../dispatcher/actions";
import { containsEmoji } from "../../../effects/utils";
import { CHAT_EFFECTS } from "../../../effects";
import { MatrixClientPeg } from "../../../MatrixClientPeg";
import { getKeyBindingsManager } from "../../../KeyBindingsManager";
import SettingsStore from "../../../settings/SettingsStore";
import { RoomPermalinkCreator } from "../../../utils/permalinks/Permalinks";
import { ActionPayload } from "../../../dispatcher/payloads";
import { decorateStartSendingTime, sendRoundTripMetric } from "../../../sendTimePerformanceMetrics";
import RoomContext, { TimelineRenderingType } from "../../../contexts/RoomContext";
import DocumentPosition from "../../../editor/position";
import { ComposerType } from "../../../dispatcher/payloads/ComposerInsertPayload";
import { getSlashCommand, isSlashCommand, runSlashCommand, shouldSendAnyway } from "../../../editor/commands";
import { KeyBindingAction } from "../../../accessibility/KeyboardShortcuts";
import { PosthogAnalytics } from "../../../PosthogAnalytics";
import { addReplyToMessageContent } from "../../../utils/Reply";
import { doMaybeLocalRoomAction } from "../../../utils/local-room";
import { Caret } from "../../../editor/caret";
import { IDiff } from "../../../editor/diff";
import { getBlobSafeMimeType } from "../../../utils/blobs";

/**
 * Build the mentions information based on the editor model (and any related events):
 *
 * 1. Search the model parts for room or user pills and fill in the mentions object.
 * 2. If this is a reply to another event, include any user mentions from that
 *    (but do not include a room mention).
 *
 * @param sender - The Matrix ID of the user sending the event.
 * @param content - The event content.
 * @param model - The editor model to search for mentions, null if there is no editor.
 * @param replyToEvent - The event being replied to or undefined if it is not a reply.
 * @param editedContent - The content of the parent event being edited.
 */
export function attachMentions(
    sender: string,
    content: IContent,
    model: EditorModel | null,
    replyToEvent: MatrixEvent | undefined,
    editedContent: IContent | null = null,
): void {
    // We always attach the mentions even if the home server doesn't yet support
    // intentional mentions. This is safe because m.mentions is an additive change
    // that should simply be ignored by incapable home servers.

    // The mentions property *always* gets included to disable legacy push rules.
    const mentions: IMentions = (content["m.mentions"] = {});

    const userMentions = new Set<string>();
    let roomMention = false;

    // If there's a reply, initialize the mentioned users as the sender of that
    // event + any mentioned users in that event.
    if (replyToEvent) {
        userMentions.add(replyToEvent.sender!.userId);
        // TODO What do we do if the reply event *doeesn't* have this property?
        // Try to fish out replies from the contents?
        const userIds = replyToEvent.getContent()["m.mentions"]?.user_ids;
        if (Array.isArray(userIds)) {
            userIds.forEach((userId) => userMentions.add(userId));
        }
    }

    // If user provided content is available, check to see if any users are mentioned.
    if (model) {
        // Add any mentioned users in the current content.
        for (const part of model.parts) {
            if (part.type === Type.UserPill) {
                userMentions.add(part.resourceId);
            } else if (part.type === Type.AtRoomPill) {
                roomMention = true;
            }
        }
    }

    // Ensure the *current* user isn't listed in the mentioned users.
    userMentions.delete(sender);

    // Finally, if this event is editing a previous event, only include users who
    // were not previously mentioned and a room mention if the previous event was
    // not a room mention.
    if (editedContent) {
        // First, the new event content gets the *full* set of users.
        const newContent = content["m.new_content"];
        const newMentions: IMentions = (newContent["m.mentions"] = {});

        // Only include the users/room if there is any content.
        if (userMentions.size) {
            newMentions.user_ids = [...userMentions];
        }
        if (roomMention) {
            newMentions.room = true;
        }

        // Fetch the mentions from the original event and remove any previously
        // mentioned users.
        const prevMentions = editedContent["m.mentions"];
        if (Array.isArray(prevMentions?.user_ids)) {
            prevMentions!.user_ids.forEach((userId) => userMentions.delete(userId));
        }

        // If the original event mentioned the room, nothing to do here.
        if (prevMentions?.room) {
            roomMention = false;
        }
    }

    // Only include the users/room if there is any content.
    if (userMentions.size) {
        mentions.user_ids = [...userMentions];
    }
    if (roomMention) {
        mentions.room = true;
    }
}

// Merges favouring the given relation
export function attachRelation(content: IContent, relation?: IEventRelation): void {
    if (relation) {
        content["m.relates_to"] = {
            ...(content["m.relates_to"] || {}),
            ...relation,
        };
    }
}

// exported for tests
export function createMessageContent(
    sender: string,
    model: EditorModel,
    replyToEvent: MatrixEvent | undefined,
    relation: IEventRelation | undefined,
    permalinkCreator?: RoomPermalinkCreator,
    includeReplyLegacyFallback = true,
): IContent {
    const isEmote = containsEmote(model);
    if (isEmote) {
        model = stripEmoteCommand(model);
    }
    if (startsWith(model, "//")) {
        model = stripPrefix(model, "/");
    }
    model = unescapeMessage(model);

    const body = textSerialize(model);

    const content: IContent = {
        msgtype: isEmote ? MsgType.Emote : MsgType.Text,
        body: body,
    };
    const formattedBody = htmlSerializeIfNeeded(model, {
        forceHTML: !!replyToEvent,
        useMarkdown: SettingsStore.getValue("MessageComposerInput.useMarkdown"),
    });
    if (formattedBody) {
        content.format = "org.matrix.custom.html";
        content.formatted_body = formattedBody;
    }

    // Build the mentions property and add it to the event content.
    attachMentions(sender, content, model, replyToEvent);

    attachRelation(content, relation);
    if (replyToEvent) {
        addReplyToMessageContent(content, replyToEvent, {
            permalinkCreator,
            includeLegacyFallback: includeReplyLegacyFallback,
        });
    }

    return content;
}

// exported for tests
export function isQuickReaction(model: EditorModel): boolean {
    const parts = model.parts;
    if (parts.length == 0) return false;
    const text = textSerialize(model);
    // shortcut takes the form "+:emoji:" or "+ :emoji:""
    // can be in 1 or 2 parts
    if (parts.length <= 2) {
        const hasShortcut = text.startsWith("+") || text.startsWith("+ ");
        const emojiMatch = text.match(EMOJI_REGEX);
        if (hasShortcut && emojiMatch && emojiMatch.length == 1) {
            return emojiMatch[0] === text.substring(1) || emojiMatch[0] === text.substring(2);
        }
    }
    return false;
}

interface ISendMessageComposerProps extends MatrixClientProps {
    room: Room;
    placeholder?: string;
    permalinkCreator?: RoomPermalinkCreator;
    relation?: IEventRelation;
    replyToEvent?: MatrixEvent;
    disabled?: boolean;
    onChange?(model: EditorModel): void;
    includeReplyLegacyFallback?: boolean;
    toggleStickerPickerOpen: () => void;
}

export class SendMessageComposer extends React.Component<ISendMessageComposerProps> {
    public static contextType = RoomContext;
    public context!: React.ContextType<typeof RoomContext>;

    private readonly prepareToEncrypt?: DebouncedFunc<() => void>;
    private readonly editorRef = createRef<BasicMessageComposer>();
    private model: EditorModel;
    private currentlyComposedEditorState: SerializedPart[] | null = null;
    private dispatcherRef: string;
    private sendHistoryManager: SendHistoryManager;

    public static defaultProps = {
        includeReplyLegacyFallback: true,
    };

    public constructor(props: ISendMessageComposerProps, context: React.ContextType<typeof RoomContext>) {
        super(props, context);
        this.context = context; // otherwise React will only set it prior to render due to type def above

        if (this.props.mxClient.isCryptoEnabled() && this.props.mxClient.isRoomEncrypted(this.props.room.roomId)) {
            this.prepareToEncrypt = throttle(
                () => {
                    this.props.mxClient.prepareToEncrypt(this.props.room);
                },
                60000,
                { leading: true, trailing: false },
            );
        }

        window.addEventListener("beforeunload", this.saveStoredEditorState);

        const partCreator = new CommandPartCreator(this.props.room, this.props.mxClient);
        const parts = this.restoreStoredEditorState(partCreator) || [];
        this.model = new EditorModel(parts, partCreator);
        this.dispatcherRef = dis.register(this.onAction);
        this.sendHistoryManager = new SendHistoryManager(this.props.room.roomId, "mx_cider_history_");
    }

    public componentDidUpdate(prevProps: ISendMessageComposerProps): void {
        const replyingToThread = this.props.relation?.key === THREAD_RELATION_TYPE.name;
        const differentEventTarget = this.props.relation?.event_id !== prevProps.relation?.event_id;

        const threadChanged = replyingToThread && differentEventTarget;
        if (threadChanged) {
            const partCreator = new CommandPartCreator(this.props.room, this.props.mxClient);
            const parts = this.restoreStoredEditorState(partCreator) || [];
            this.model.reset(parts);
            this.editorRef.current?.focus();
        }
    }

    private onKeyDown = (event: KeyboardEvent): void => {
        // ignore any keypress while doing IME compositions
        if (this.editorRef.current?.isComposing(event)) {
            return;
        }
        const replyingToThread = this.props.relation?.key === THREAD_RELATION_TYPE.name;
        const action = getKeyBindingsManager().getMessageComposerAction(event);
        switch (action) {
            case KeyBindingAction.SendMessage:
                this.sendMessage();
                event.preventDefault();
                break;
            case KeyBindingAction.SelectPrevSendHistory:
            case KeyBindingAction.SelectNextSendHistory: {
                // Try select composer history
                const selected = this.selectSendHistory(action === KeyBindingAction.SelectPrevSendHistory);
                if (selected) {
                    // We're selecting history, so prevent the key event from doing anything else
                    event.preventDefault();
                }
                break;
            }
            case KeyBindingAction.ShowStickerPicker: {
                if (!SettingsStore.getValue("MessageComposerInput.showStickersButton")) {
                    return; // Do nothing if there is no Stickers button
                }
                this.props.toggleStickerPickerOpen();
                event.preventDefault();
                break;
            }
            case KeyBindingAction.EditPrevMessage:
                // selection must be collapsed and caret at start
                if (this.editorRef.current?.isSelectionCollapsed() && this.editorRef.current?.isCaretAtStart()) {
                    const events = this.context.liveTimeline
                        ?.getEvents()
                        .concat(replyingToThread ? [] : this.props.room.getPendingEvents());
                    const editEvent = events
                        ? findEditableEvent({
                              events,
                              isForward: false,
                              matrixClient: MatrixClientPeg.safeGet(),
                          })
                        : undefined;
                    if (editEvent) {
                        // We're selecting history, so prevent the key event from doing anything else
                        event.preventDefault();
                        dis.dispatch({
                            action: Action.EditEvent,
                            event: editEvent,
                            timelineRenderingType: this.context.timelineRenderingType,
                        });
                    }
                }
                break;
            case KeyBindingAction.CancelReplyOrEdit:
                if (!!this.context.replyToEvent) {
                    dis.dispatch({
                        action: "reply_to_event",
                        event: null,
                        context: this.context.timelineRenderingType,
                    });
                    event.preventDefault();
                    event.stopPropagation();
                }
                break;
        }
    };

    // we keep sent messages/commands in a separate history (separate from undo history)
    // so you can alt+up/down in them
    private selectSendHistory(up: boolean): boolean {
        const delta = up ? -1 : 1;
        // True if we are not currently selecting history, but composing a message
        if (this.sendHistoryManager.currentIndex === this.sendHistoryManager.history.length) {
            // We can't go any further - there isn't any more history, so nop.
            if (!up) {
                return false;
            }
            this.currentlyComposedEditorState = this.model.serializeParts();
        } else if (
            this.currentlyComposedEditorState &&
            this.sendHistoryManager.currentIndex + delta === this.sendHistoryManager.history.length
        ) {
            // True when we return to the message being composed currently
            this.model.reset(this.currentlyComposedEditorState);
            this.sendHistoryManager.currentIndex = this.sendHistoryManager.history.length;
            return true;
        }
        const { parts, replyEventId } = this.sendHistoryManager.getItem(delta);
        dis.dispatch({
            action: "reply_to_event",
            event: replyEventId ? this.props.room.findEventById(replyEventId) : null,
            context: this.context.timelineRenderingType,
        });
        if (parts) {
            this.model.reset(parts);
            this.editorRef.current?.focus();
        }
        return true;
    }

    private sendQuickReaction(): void {
        const timeline = this.context.liveTimeline;
        if (!timeline) return;
        const events = timeline.getEvents();
        const reaction = this.model.parts[1].text;
        for (let i = events.length - 1; i >= 0; i--) {
            if (events[i].getType() === EventType.RoomMessage) {
                let shouldReact = true;
                const lastMessage = events[i];
                const userId = MatrixClientPeg.safeGet().getSafeUserId();
                const messageReactions = this.props.room.relations.getChildEventsForEvent(
                    lastMessage.getId()!,
                    RelationType.Annotation,
                    EventType.Reaction,
                );

                // if we have already sent this reaction, don't redact but don't re-send
                if (messageReactions) {
                    const myReactionEvents =
                        messageReactions.getAnnotationsBySender()?.[userId] || new Set<MatrixEvent>();
                    const myReactionKeys = [...myReactionEvents]
                        .filter((event) => !event.isRedacted())
                        .map((event) => event.getRelation()?.key);
                    shouldReact = !myReactionKeys.includes(reaction);
                }
                if (shouldReact) {
                    MatrixClientPeg.safeGet().sendEvent(lastMessage.getRoomId()!, EventType.Reaction, {
                        "m.relates_to": {
                            rel_type: RelationType.Annotation,
                            event_id: lastMessage.getId(),
                            key: reaction,
                        },
                    });
                    dis.dispatch({ action: "message_sent" });
                }
                break;
            }
        }
    }

    public async sendMessage(): Promise<void> {
        const model = this.model;

        if (model.isEmpty) {
            return;
        }

        const posthogEvent: ComposerEvent = {
            eventName: "Composer",
            isEditing: false,
            isLocation: false,
            isReply: !!this.props.replyToEvent,
            inThread: this.props.relation?.rel_type === THREAD_RELATION_TYPE.name,
        };
        if (posthogEvent.inThread && this.props.relation!.event_id) {
            const threadRoot = this.props.room.findEventById(this.props.relation!.event_id);
            posthogEvent.startsThread = threadRoot?.getThread()?.events.length === 1;
        }
        PosthogAnalytics.instance.trackEvent<ComposerEvent>(posthogEvent);

        // Replace emoticon at the end of the message
        if (SettingsStore.getValue("MessageComposerInput.autoReplaceEmoji")) {
            const indexOfLastPart = model.parts.length - 1;
            const positionInLastPart = model.parts[indexOfLastPart].text.length;
            this.editorRef.current?.replaceEmoticon(
                new DocumentPosition(indexOfLastPart, positionInLastPart),
                REGEX_EMOTICON,
            );
        }

        const replyToEvent = this.props.replyToEvent;
        let shouldSend = true;
        let content: IContent | null = null;

        if (!containsEmote(model) && isSlashCommand(this.model)) {
            const [cmd, args, commandText] = getSlashCommand(this.model);
            if (cmd) {
                const threadId =
                    this.props.relation?.rel_type === THREAD_RELATION_TYPE.name ? this.props.relation?.event_id : null;

                let commandSuccessful: boolean;
                [content, commandSuccessful] = await runSlashCommand(
                    MatrixClientPeg.safeGet(),
                    cmd,
                    args,
                    this.props.room.roomId,
                    threadId ?? null,
                );
                if (!commandSuccessful) {
                    return; // errored
                }

                if (
                    content &&
                    [CommandCategories.messages as string, CommandCategories.effects as string].includes(cmd.category)
                ) {
                    // Attach any mentions which might be contained in the command content.
                    attachMentions(this.props.mxClient.getSafeUserId(), content, model, replyToEvent);
                    attachRelation(content, this.props.relation);
                    if (replyToEvent) {
                        addReplyToMessageContent(content, replyToEvent, {
                            permalinkCreator: this.props.permalinkCreator,
                            // Exclude the legacy fallback for custom event types such as those used by /fireworks
                            includeLegacyFallback: content.msgtype?.startsWith("m.") ?? true,
                        });
                    }
                } else {
                    shouldSend = false;
                }
            } else {
                const sendAnyway = await shouldSendAnyway(commandText);
                // re-focus the composer after QuestionDialog is closed
                dis.dispatch({
                    action: Action.FocusAComposer,
                    context: this.context.timelineRenderingType,
                });
                // if !sendAnyway bail to let the user edit the composer and try again
                if (!sendAnyway) return;
            }
        }

        if (isQuickReaction(model)) {
            shouldSend = false;
            this.sendQuickReaction();
        }

        if (shouldSend) {
            const { roomId } = this.props.room;
            if (!content) {
                content = createMessageContent(
                    this.props.mxClient.getSafeUserId(),
                    model,
                    replyToEvent,
                    this.props.relation,
                    this.props.permalinkCreator,
                    this.props.includeReplyLegacyFallback,
                );
            }
            // don't bother sending an empty message
            if (!content.body.trim()) return;

            if (SettingsStore.getValue("Performance.addSendMessageTimingMetadata")) {
                decorateStartSendingTime(content);
            }

            const threadId =
                this.props.relation?.rel_type === THREAD_RELATION_TYPE.name ? this.props.relation.event_id : null;

            const prom = doMaybeLocalRoomAction(
                roomId,
                (actualRoomId: string) => this.props.mxClient.sendMessage(actualRoomId, threadId ?? null, content!),
                this.props.mxClient,
            );
            if (replyToEvent) {
                // Clear reply_to_event as we put the message into the queue
                // if the send fails, retry will handle resending.
                dis.dispatch({
                    action: "reply_to_event",
                    event: null,
                    context: this.context.timelineRenderingType,
                });
            }
            dis.dispatch({ action: "message_sent" });
            CHAT_EFFECTS.forEach((effect) => {
                if (containsEmoji(content!, effect.emojis)) {
                    // For initial threads launch, chat effects are disabled
                    // see #19731
                    const isNotThread = this.props.relation?.rel_type !== THREAD_RELATION_TYPE.name;
                    if (isNotThread) {
                        dis.dispatch({ action: `effects.${effect.command}` });
                    }
                }
            });
            if (SettingsStore.getValue("Performance.addSendMessageTimingMetadata")) {
                prom.then((resp) => {
                    sendRoundTripMetric(this.props.mxClient, roomId, resp.event_id);
                });
            }
        }

        this.sendHistoryManager.save(model, replyToEvent);
        // clear composer
        model.reset([]);
        this.editorRef.current?.clearUndoHistory();
        this.editorRef.current?.focus();
        this.clearStoredEditorState();
        if (shouldSend && SettingsStore.getValue("scrollToBottomOnMessageSent")) {
            dis.dispatch({
                action: "scroll_to_bottom",
                timelineRenderingType: this.context.timelineRenderingType,
            });
        }
    }

    public componentWillUnmount(): void {
        dis.unregister(this.dispatcherRef);
        window.removeEventListener("beforeunload", this.saveStoredEditorState);
        this.saveStoredEditorState();
    }

    private get editorStateKey(): string {
        let key = `mx_cider_state_${this.props.room.roomId}`;
        if (this.props.relation?.rel_type === THREAD_RELATION_TYPE.name) {
            key += `_${this.props.relation.event_id}`;
        }
        return key;
    }

    private clearStoredEditorState(): void {
        localStorage.removeItem(this.editorStateKey);
    }

    private restoreStoredEditorState(partCreator: PartCreator): Part[] | null {
        const replyingToThread = this.props.relation?.key === THREAD_RELATION_TYPE.name;
        if (replyingToThread) {
            return null;
        }

        const json = localStorage.getItem(this.editorStateKey);
        if (json) {
            try {
                const { parts: serializedParts, replyEventId } = JSON.parse(json);
                const parts: Part[] = serializedParts.map((p: SerializedPart) => partCreator.deserializePart(p));
                if (replyEventId) {
                    dis.dispatch({
                        action: "reply_to_event",
                        event: this.props.room.findEventById(replyEventId),
                        context: this.context.timelineRenderingType,
                    });
                }
                return parts;
            } catch (e) {
                logger.error(e);
            }
        }

        return null;
    }

    // should save state when editor has contents or reply is open
    private shouldSaveStoredEditorState = (): boolean => {
        return !this.model.isEmpty || !!this.props.replyToEvent;
    };

    private saveStoredEditorState = (): void => {
        if (this.shouldSaveStoredEditorState()) {
            const item = SendHistoryManager.createItem(this.model, this.props.replyToEvent);
            localStorage.setItem(this.editorStateKey, JSON.stringify(item));
        } else {
            this.clearStoredEditorState();
        }
    };

    private onAction = (payload: ActionPayload): void => {
        // don't let the user into the composer if it is disabled - all of these branches lead
        // to the cursor being in the composer
        if (this.props.disabled) return;

        switch (payload.action) {
            case "reply_to_event":
            case Action.FocusSendMessageComposer:
                if ((payload.context ?? TimelineRenderingType.Room) === this.context.timelineRenderingType) {
                    this.editorRef.current?.focus();
                }
                break;
            case Action.ComposerInsert:
                if (payload.timelineRenderingType !== this.context.timelineRenderingType) break;
                if (payload.composerType !== ComposerType.Send) break;

                if (payload.userId) {
                    this.editorRef.current?.insertMention(payload.userId);
                } else if (payload.event) {
                    this.editorRef.current?.insertQuotedMessage(payload.event);
                } else if (payload.text) {
                    this.editorRef.current?.insertPlaintext(payload.text);
                }
                break;
        }
    };

    private onPaste = (event: Event | SyntheticEvent, data: DataTransfer): boolean => {
        // Prioritize text on the clipboard over files if RTF is present as Office on macOS puts a bitmap
        // in the clipboard as well as the content being copied. Modern versions of Office seem to not do this anymore.
        // We check text/rtf instead of text/plain as when copy+pasting a file from Finder or Gnome Image Viewer
        // it puts the filename in as text/plain which we want to ignore.
        if (data.files.length && !data.types.includes("text/rtf")) {
            ContentMessages.sharedInstance().sendContentListToRoom(
                Array.from(data.files),
                this.props.room.roomId,
                this.props.relation,
                this.props.mxClient,
                this.context.timelineRenderingType,
            );
            return true; // to skip internal onPaste handler
        }

        // Safari `Insert from iPhone or iPad`
        // data.getData("text/html") returns a string like: <img src="blob:https://...">
        if (data.types.includes("text/html")) {
            const imgElementStr = data.getData("text/html");
            const parser = new DOMParser();
            const imgDoc = parser.parseFromString(imgElementStr, "text/html");

            if (
                imgDoc.getElementsByTagName("img").length !== 1 ||
                !imgDoc.querySelector("img")?.src.startsWith("blob:") ||
                imgDoc.childNodes.length !== 1
            ) {
                console.log("Failed to handle pasted content as Safari inserted content");

                // Fallback to internal onPaste handler
                return false;
            }
            const imgSrc = imgDoc!.querySelector("img")!.src;

            fetch(imgSrc).then(
                (response) => {
                    response.blob().then(
                        (imgBlob) => {
                            const type = imgBlob.type;
                            const safetype = getBlobSafeMimeType(type);
                            const ext = type.split("/")[1];
                            const parts = response.url.split("/");
                            const filename = parts[parts.length - 1];
                            const file = new File([imgBlob], filename + "." + ext, { type: safetype });
                            ContentMessages.sharedInstance().sendContentToRoom(
                                file,
                                this.props.room.roomId,
                                this.props.relation,
                                this.props.mxClient,
                                this.context.replyToEvent,
                            );
                        },
                        (error) => {
                            console.log(error);
                        },
                    );
                },
                (error) => {
                    console.log(error);
                },
            );

            // Skip internal onPaste handler
            return true;
        }

        return false;
    };

    private onChange = (selection?: Caret, inputType?: string, diff?: IDiff): void => {
        // We call this in here rather than onKeyDown as that would trip it on global shortcuts e.g. Ctrl-k also
        if (!!diff) {
            this.prepareToEncrypt?.();
        }

        this.props.onChange?.(this.model);
    };

    private focusComposer = (): void => {
        this.editorRef.current?.focus();
    };

    public render(): React.ReactNode {
        const threadId =
            this.props.relation?.rel_type === THREAD_RELATION_TYPE.name ? this.props.relation.event_id : undefined;
        return (
            <div className="mx_SendMessageComposer" onClick={this.focusComposer} onKeyDown={this.onKeyDown}>
                <BasicMessageComposer
                    onChange={this.onChange}
                    ref={this.editorRef}
                    model={this.model}
                    room={this.props.room}
                    threadId={threadId}
                    label={this.props.placeholder}
                    placeholder={this.props.placeholder}
                    onPaste={this.onPaste}
                    disabled={this.props.disabled}
                />
            </div>
        );
    }
}

const SendMessageComposerWithMatrixClient = withMatrixClientHOC(SendMessageComposer);
export default SendMessageComposerWithMatrixClient;
