/*
Copyright 2020 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, {useCallback, useState, useEffect, useContext} from "react";
import classNames from "classnames";
import {Room} from "matrix-js-sdk/src/models/room";
import {getHttpUriForMxc} from "matrix-js-sdk/src/content-repo";

import MatrixClientContext from "../../../contexts/MatrixClientContext";
import { useIsEncrypted } from '../../../hooks/useIsEncrypted';
import BaseCard, { Group } from "./BaseCard";
import { _t } from '../../../languageHandler';
import RoomAvatar from "../avatars/RoomAvatar";
import AccessibleButton from "../elements/AccessibleButton";
import defaultDispatcher from "../../../dispatcher/dispatcher";
import {Action} from "../../../dispatcher/actions";
import {RightPanelPhases} from "../../../stores/RightPanelStorePhases";
import {SetRightPanelPhasePayload} from "../../../dispatcher/payloads/SetRightPanelPhasePayload";
import Modal from "../../../Modal";
import ShareDialog from '../dialogs/ShareDialog';
import {useEventEmitter} from "../../../hooks/useEventEmitter";
import WidgetEchoStore from "../../../stores/WidgetEchoStore";
import WidgetUtils from "../../../utils/WidgetUtils";
import {IntegrationManagers} from "../../../integrations/IntegrationManagers";
import SettingsStore from "../../../settings/SettingsStore";
import TextWithTooltip from "../elements/TextWithTooltip";
import BaseAvatar from "../avatars/BaseAvatar";
import AccessibleTooltipButton from "../elements/AccessibleTooltipButton";
import WidgetStore, {IApp} from "../../../stores/WidgetStore";

interface IProps {
    room: Room;
    onClose(): void;
}

interface IAppsSectionProps {
    room: Room;
}

interface IButtonProps {
    className: string;
    onClick(): void;
}

const Button: React.FC<IButtonProps> = ({ children, className, onClick }) => {
    return <AccessibleButton
        className={classNames("mx_BaseCard_Button mx_RoomSummaryCard_Button", className)}
        onClick={onClick}
    >
        { children }
    </AccessibleButton>;
};

export const useWidgets = (room: Room) => {
    const [apps, setApps] = useState<IApp[]>(WidgetStore.instance.getApps(room));

    const updateApps = useCallback(() => {
        // Copy the array so that we always trigger a re-render, as some updates mutate the array of apps/settings
        setApps([...WidgetStore.instance.getApps(room)]);
    }, [room]);

    useEffect(updateApps, [room]);
    useEventEmitter(WidgetEchoStore, "update", updateApps);
    useEventEmitter(WidgetStore.instance, room.roomId, updateApps);

    return apps;
};

const AppsSection: React.FC<IAppsSectionProps> = ({ room }) => {
    const cli = useContext(MatrixClientContext);
    const apps = useWidgets(room);

    const onManageIntegrations = () => {
        const managers = IntegrationManagers.sharedInstance();
        if (!managers.hasManager()) {
            managers.openNoManagerDialog();
        } else {
            if (SettingsStore.getValue("feature_many_integration_managers")) {
                managers.openAll(room);
            } else {
                managers.getPrimaryManager().open(room);
            }
        }
    };

    return <Group className="mx_RoomSummaryCard_appsGroup" title={_t("Apps")}>
        { apps.map(app => {
            const name = WidgetUtils.getWidgetName(app);
            const dataTitle = WidgetUtils.getWidgetDataTitle(app);
            const subtitle = dataTitle && " - " + dataTitle;

            let iconUrls = [require("../../../../res/img/element-icons/room/default_app.svg")];
            // heuristics for some better icons until Widgets support their own icons
            if (app.type.includes("meeting") || app.type.includes("calendar")) {
                iconUrls = [require("../../../../res/img/element-icons/room/default_cal.svg")];
            } else if (app.type.includes("pad") || app.type.includes("doc") || app.type.includes("calc")) {
                iconUrls = [require("../../../../res/img/element-icons/room/default_doc.svg")];
            } else if (app.type.includes("clock")) {
                iconUrls = [require("../../../../res/img/element-icons/room/default_clock.svg")];
            }

            if (app.avatar_url) { // MSC2765
                iconUrls.unshift(getHttpUriForMxc(cli.getHomeserverUrl(), app.avatar_url, 20, 20, "crop"));
            }

            const isPinned = WidgetStore.instance.isPinned(app.id);
            const classes = classNames("mx_RoomSummaryCard_icon_app", {
                mx_RoomSummaryCard_icon_app_pinned: isPinned,
            });

            if (isPinned) {
                const onClick = () => {
                    WidgetStore.instance.unpinWidget(app.id);
                };

                return <AccessibleTooltipButton
                    key={app.id}
                    className={classNames("mx_BaseCard_Button mx_RoomSummaryCard_Button", classes)}
                    onClick={onClick}
                    title={_t("Unpin app")}
                >
                    <BaseAvatar name={app.id} urls={iconUrls} width={20} height={20} />
                    <span>{name}</span>
                    { subtitle }
                </AccessibleTooltipButton>
            }

            const onOpenWidgetClick = () => {
                defaultDispatcher.dispatch<SetRightPanelPhasePayload>({
                    action: Action.SetRightPanelPhase,
                    phase: RightPanelPhases.Widget,
                    refireParams: {
                        widgetId: app.id,
                    },
                });
            };

            return (
                <Button key={app.id} className={classes} onClick={onOpenWidgetClick}>
                    <BaseAvatar name={app.id} urls={iconUrls} width={20} height={20} />
                    <span>{name}</span>
                    { subtitle }
                </Button>
            );
        }) }

        <AccessibleButton kind="link" onClick={onManageIntegrations}>
            { apps.length > 0 ? _t("Edit apps") : _t("Add apps") }
        </AccessibleButton>
    </Group>;
};

const onRoomMembersClick = () => {
    defaultDispatcher.dispatch<SetRightPanelPhasePayload>({
        action: Action.SetRightPanelPhase,
        phase: RightPanelPhases.RoomMemberList,
    });
};

const onRoomFilesClick = () => {
    defaultDispatcher.dispatch<SetRightPanelPhasePayload>({
        action: Action.SetRightPanelPhase,
        phase: RightPanelPhases.FilePanel,
    });
};

const onRoomSettingsClick = () => {
    defaultDispatcher.dispatch({ action: "open_room_settings" });
};

const useMemberCount = (room: Room) => {
    const [count, setCount] = useState(room.getJoinedMembers().length);
    useEventEmitter(room.currentState, "RoomState.members", () => {
        setCount(room.getJoinedMembers().length);
    });
    return count;
};

const RoomSummaryCard: React.FC<IProps> = ({ room, onClose }) => {
    const cli = useContext(MatrixClientContext);

    const onShareRoomClick = () => {
        Modal.createTrackedDialog('share room dialog', '', ShareDialog, {
            target: room,
        });
    };

    const isRoomEncrypted = useIsEncrypted(cli, room);

    const alias = room.getCanonicalAlias() || room.getAltAliases()[0] || "";
    const header = <React.Fragment>
        <div className="mx_RoomSummaryCard_avatar" role="presentation">
            <RoomAvatar room={room} height={54} width={54} viewAvatarOnClick />
            <TextWithTooltip
                tooltip={isRoomEncrypted ? _t("Encrypted") : _t("Not encrypted")}
                class={classNames("mx_RoomSummaryCard_e2ee", {
                    mx_RoomSummaryCard_e2ee_secure: isRoomEncrypted,
                })}
            />
        </div>

        <h2 title={room.name}>{ room.name }</h2>
        <div className="mx_RoomSummaryCard_alias" title={alias}>
            { alias }
        </div>
    </React.Fragment>;

    const memberCount = useMemberCount(room);

    return <BaseCard header={header} className="mx_RoomSummaryCard" onClose={onClose}>
        <Group title={_t("About")} className="mx_RoomSummaryCard_aboutGroup">
            <Button className="mx_RoomSummaryCard_icon_people" onClick={onRoomMembersClick}>
                {_t("%(count)s people", { count: memberCount })}
            </Button>
            <Button className="mx_RoomSummaryCard_icon_files" onClick={onRoomFilesClick}>
                {_t("Show files")}
            </Button>
            <Button className="mx_RoomSummaryCard_icon_share" onClick={onShareRoomClick}>
                {_t("Share room")}
            </Button>
            <Button className="mx_RoomSummaryCard_icon_settings" onClick={onRoomSettingsClick}>
                {_t("Room settings")}
            </Button>
        </Group>

        <AppsSection room={room} />
    </BaseCard>;
};

export default RoomSummaryCard;