/*
Copyright 2015, 2016 OpenMarket Ltd
Copyright 2018 New Vector Ltd
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 from "react";
import classNames from "classnames";

import AccessibleButton from "../elements/AccessibleButton";
import { _t, _td } from "../../../languageHandler";
import E2EIcon, { E2EState } from "./E2EIcon";
import BaseAvatar from "../avatars/BaseAvatar";
import PresenceLabel from "./PresenceLabel";

export enum PowerStatus {
    Admin = "admin",
    Moderator = "moderator",
}

const PowerLabel: Record<PowerStatus, string> = {
    [PowerStatus.Admin]: _td("Admin"),
    [PowerStatus.Moderator]: _td("Mod"),
};

export type PresenceState = "offline" | "online" | "unavailable";

const PRESENCE_CLASS: Record<PresenceState, string> = {
    offline: "mx_EntityTile_offline",
    online: "mx_EntityTile_online",
    unavailable: "mx_EntityTile_unavailable",
};

function presenceClassForMember(presenceState?: PresenceState, lastActiveAgo?: number, showPresence?: boolean): string {
    if (showPresence === false) {
        return "mx_EntityTile_online_beenactive";
    }

    // offline is split into two categories depending on whether we have
    // a last_active_ago for them.
    if (presenceState === "offline") {
        if (lastActiveAgo) {
            return PRESENCE_CLASS["offline"] + "_beenactive";
        } else {
            return PRESENCE_CLASS["offline"] + "_neveractive";
        }
    } else if (presenceState) {
        return PRESENCE_CLASS[presenceState];
    } else {
        return PRESENCE_CLASS["offline"] + "_neveractive";
    }
}

interface IProps {
    name?: string;
    nameJSX?: JSX.Element;
    title?: string;
    avatarJsx?: JSX.Element; // <BaseAvatar />
    className?: string;
    presenceState: PresenceState;
    presenceLastActiveAgo: number;
    presenceLastTs: number;
    presenceCurrentlyActive?: boolean;
    showInviteButton: boolean;
    onClick(): void;
    suppressOnHover: boolean;
    showPresence: boolean;
    subtextLabel?: string;
    e2eStatus?: E2EState;
    powerStatus?: PowerStatus;
}

interface IState {
    hover: boolean;
}

export default class EntityTile extends React.PureComponent<IProps, IState> {
    public static defaultProps = {
        onClick: () => {},
        presenceState: "offline",
        presenceLastActiveAgo: 0,
        presenceLastTs: 0,
        showInviteButton: false,
        suppressOnHover: false,
        showPresence: true,
    };

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

        this.state = {
            hover: false,
        };
    }

    public render(): React.ReactNode {
        const mainClassNames: Record<string, boolean> = {
            mx_EntityTile: true,
            mx_EntityTile_noHover: !!this.props.suppressOnHover,
        };
        if (this.props.className) mainClassNames[this.props.className] = true;

        const presenceClass = presenceClassForMember(
            this.props.presenceState,
            this.props.presenceLastActiveAgo,
            this.props.showPresence,
        );
        mainClassNames[presenceClass] = true;

        let nameEl;
        const name = this.props.nameJSX || this.props.name;

        if (!this.props.suppressOnHover) {
            const activeAgo = this.props.presenceLastActiveAgo
                ? Date.now() - (this.props.presenceLastTs - this.props.presenceLastActiveAgo)
                : -1;

            let presenceLabel: JSX.Element | undefined;
            if (this.props.showPresence) {
                presenceLabel = (
                    <PresenceLabel
                        activeAgo={activeAgo}
                        currentlyActive={this.props.presenceCurrentlyActive}
                        presenceState={this.props.presenceState}
                    />
                );
            }
            if (this.props.subtextLabel) {
                presenceLabel = <span className="mx_EntityTile_subtext">{this.props.subtextLabel}</span>;
            }
            nameEl = (
                <div className="mx_EntityTile_details">
                    <div className="mx_EntityTile_name">{name}</div>
                    {presenceLabel}
                </div>
            );
        } else if (this.props.subtextLabel) {
            nameEl = (
                <div className="mx_EntityTile_details">
                    <div className="mx_EntityTile_name">{name}</div>
                    <span className="mx_EntityTile_subtext">{this.props.subtextLabel}</span>
                </div>
            );
        } else {
            nameEl = <div className="mx_EntityTile_name">{name}</div>;
        }

        let inviteButton;
        if (this.props.showInviteButton) {
            inviteButton = (
                <div className="mx_EntityTile_invite">
                    <img
                        alt={_t("Invite")}
                        src={require("../../../../res/img/plus.svg").default}
                        width="16"
                        height="16"
                    />
                </div>
            );
        }

        let powerLabel;
        const powerStatus = this.props.powerStatus;
        if (powerStatus) {
            const powerText = _t(PowerLabel[powerStatus]);
            powerLabel = <div className="mx_EntityTile_power">{powerText}</div>;
        }

        let e2eIcon;
        const { e2eStatus } = this.props;
        if (e2eStatus) {
            e2eIcon = <E2EIcon status={e2eStatus} isUser={true} bordered={true} />;
        }

        const av = this.props.avatarJsx || (
            <BaseAvatar name={this.props.name} width={36} height={36} aria-hidden="true" />
        );

        // The wrapping div is required to make the magic mouse listener work, for some reason.
        return (
            <div>
                <AccessibleButton
                    className={classNames(mainClassNames)}
                    title={this.props.title}
                    onClick={this.props.onClick}
                >
                    <div className="mx_EntityTile_avatar">
                        {av}
                        {e2eIcon}
                    </div>
                    {nameEl}
                    {powerLabel}
                    {inviteButton}
                </AccessibleButton>
            </div>
        );
    }
}