/*
Copyright 2024 New Vector Ltd.
Copyright 2021 Šimon Brandner <simon.bra.ag@gmail.com>

SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
Please see LICENSE files in the repository root for full details.
*/

import React, { type JSX, createRef } from "react";
import { type MatrixEvent } from "matrix-js-sdk/src/matrix";
import { CallErrorCode, CallState } from "matrix-js-sdk/src/webrtc/call";
import classNames from "classnames";

import { _t } from "../../../languageHandler";
import MemberAvatar from "../avatars/MemberAvatar";
import type LegacyCallEventGrouper from "../../structures/LegacyCallEventGrouper";
import { LegacyCallEventGrouperEvent } from "../../structures/LegacyCallEventGrouper";
import AccessibleButton from "../elements/AccessibleButton";
import InfoTooltip, { InfoTooltipKind } from "../elements/InfoTooltip";
import { formatPreciseDuration } from "../../../DateUtils";
import { Clock } from "../../../shared-components/audio/Clock";

const MAX_NON_NARROW_WIDTH = (450 / 70) * 100;

interface IProps {
    mxEvent: MatrixEvent;
    callEventGrouper: LegacyCallEventGrouper;
    timestamp?: JSX.Element;
}

interface IState {
    callState?: CallState;
    silenced: boolean;
    narrow: boolean;
    length: number;
}

export default class LegacyCallEvent extends React.PureComponent<IProps, IState> {
    private wrapperElement = createRef<HTMLDivElement>();
    private resizeObserver?: ResizeObserver;

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

        this.state = {
            callState: this.props.callEventGrouper.state,
            silenced: false,
            narrow: false,
            length: 0,
        };
    }

    public componentDidMount(): void {
        this.props.callEventGrouper.addListener(LegacyCallEventGrouperEvent.StateChanged, this.onStateChanged);
        this.props.callEventGrouper.addListener(LegacyCallEventGrouperEvent.SilencedChanged, this.onSilencedChanged);
        this.props.callEventGrouper.addListener(LegacyCallEventGrouperEvent.LengthChanged, this.onLengthChanged);

        this.resizeObserver = new ResizeObserver(this.resizeObserverCallback);
        if (this.wrapperElement.current) this.resizeObserver.observe(this.wrapperElement.current);
    }

    public componentWillUnmount(): void {
        this.props.callEventGrouper.removeListener(LegacyCallEventGrouperEvent.StateChanged, this.onStateChanged);
        this.props.callEventGrouper.removeListener(LegacyCallEventGrouperEvent.SilencedChanged, this.onSilencedChanged);
        this.props.callEventGrouper.removeListener(LegacyCallEventGrouperEvent.LengthChanged, this.onLengthChanged);

        this.resizeObserver?.disconnect();
    }

    private onLengthChanged = (length: number): void => {
        this.setState({ length });
    };

    private resizeObserverCallback = (entries: ResizeObserverEntry[]): void => {
        const wrapperElementEntry = entries.find((entry) => entry.target === this.wrapperElement.current);
        if (!wrapperElementEntry) return;

        this.setState({ narrow: wrapperElementEntry.contentRect.width < MAX_NON_NARROW_WIDTH });
    };

    private onSilencedChanged = (newState: boolean): void => {
        this.setState({ silenced: newState });
    };

    private onStateChanged = (newState: CallState): void => {
        this.setState({ callState: newState });
    };

    private renderCallBackButton(text: string): JSX.Element {
        return (
            <AccessibleButton
                className="mx_LegacyCallEvent_content_button mx_LegacyCallEvent_content_button_callBack"
                onClick={this.props.callEventGrouper.callBack}
                kind="primary"
            >
                <span> {text} </span>
            </AccessibleButton>
        );
    }

    private renderSilenceIcon(): JSX.Element {
        const silenceClass = classNames({
            mx_LegacyCallEvent_iconButton: true,
            mx_LegacyCallEvent_unSilence: this.state.silenced,
            mx_LegacyCallEvent_silence: !this.state.silenced,
        });

        return (
            <AccessibleButton
                className={silenceClass}
                onClick={this.props.callEventGrouper.toggleSilenced}
                title={this.state.silenced ? _t("voip|unsilence") : _t("voip|silence")}
            />
        );
    }

    private renderContent(): JSX.Element {
        if (this.state.callState === CallState.Ringing) {
            let silenceIcon;
            if (!this.state.narrow) {
                silenceIcon = this.renderSilenceIcon();
            }

            return (
                <div className="mx_LegacyCallEvent_content">
                    {silenceIcon}
                    <AccessibleButton
                        className="mx_LegacyCallEvent_content_button mx_LegacyCallEvent_content_button_reject"
                        onClick={this.props.callEventGrouper.rejectCall}
                        kind="danger"
                    >
                        <span> {_t("action|decline")} </span>
                    </AccessibleButton>
                    <AccessibleButton
                        className="mx_LegacyCallEvent_content_button mx_LegacyCallEvent_content_button_answer"
                        onClick={this.props.callEventGrouper.answerCall}
                        kind="primary"
                    >
                        <span> {_t("action|accept")} </span>
                    </AccessibleButton>
                    {this.props.timestamp}
                </div>
            );
        }
        if (this.state.callState === CallState.Ended) {
            const hangupReason = this.props.callEventGrouper.hangupReason;
            const gotRejected = this.props.callEventGrouper.gotRejected;

            if (gotRejected) {
                return (
                    <div className="mx_LegacyCallEvent_content">
                        {_t("timeline|m.call.invite|declined")}
                        {this.renderCallBackButton(_t("timeline|m.call.invite|call_back_prompt"))}
                        {this.props.timestamp}
                    </div>
                );
            } else if (hangupReason === CallErrorCode.AnsweredElsewhere) {
                return (
                    <div className="mx_LegacyCallEvent_content">
                        {_t("timeline|m.call.invite|answered_elsewhere")}
                        {this.props.timestamp}
                    </div>
                );
            } else if (this.props.callEventGrouper.callWasMissed) {
                return (
                    <div className="mx_LegacyCallEvent_content">
                        {_t("timeline|m.call.invite|missed_call")}
                        {this.renderCallBackButton(_t("timeline|m.call.invite|call_back_prompt"))}
                        {this.props.timestamp}
                    </div>
                );
            } else if (!hangupReason || [CallErrorCode.UserHangup, "user hangup"].includes(hangupReason)) {
                // workaround for https://github.com/vector-im/element-web/issues/5178
                // it seems Android randomly sets a reason of "user hangup" which is
                // interpreted as an error code :(
                // https://github.com/vector-im/riot-android/issues/2623
                // Also the correct hangup code as of VoIP v1 (with underscore)
                // Also, if we don't have a reason
                const duration = this.props.callEventGrouper.duration!;
                let text = _t("timeline|m.call.hangup|dm");
                if (duration) {
                    text += " • " + formatPreciseDuration(duration);
                }
                return (
                    <div className="mx_LegacyCallEvent_content">
                        {text}
                        {this.props.timestamp}
                    </div>
                );
            } else if (hangupReason === CallErrorCode.InviteTimeout) {
                return (
                    <div className="mx_LegacyCallEvent_content">
                        {_t("timeline|m.call.invite|no_answer")}
                        {this.renderCallBackButton(_t("timeline|m.call.invite|call_back_prompt"))}
                        {this.props.timestamp}
                    </div>
                );
            }

            let reason;
            if (hangupReason === CallErrorCode.IceFailed) {
                // We couldn't establish a connection at all
                reason = _t("timeline|m.call.invite|failed_connect_media");
            } else if (hangupReason === "ice_timeout") {
                // We established a connection but it died
                reason = _t("timeline|m.call.invite|failed_connection");
            } else if (hangupReason === CallErrorCode.NoUserMedia) {
                // The other side couldn't open capture devices
                reason = _t("timeline|m.call.invite|failed_opponent_media");
            } else if (hangupReason === "unknown_error") {
                // An error code the other side doesn't have a way to express
                // (as opposed to an error code they gave but we don't know about,
                // in which case we show the error code)
                reason = _t("timeline|m.call.invite|unknown_error");
            } else if (hangupReason === CallErrorCode.UserBusy) {
                reason = _t("voip|user_busy_description");
            } else {
                reason = _t("timeline|m.call.invite|unknown_failure", { reason: hangupReason });
            }

            return (
                <div className="mx_LegacyCallEvent_content">
                    <InfoTooltip
                        tooltip={reason}
                        className="mx_LegacyCallEvent_content_tooltip"
                        kind={InfoTooltipKind.Warning}
                    />
                    {_t("timeline|m.call.invite|failed_connection")}
                    {this.renderCallBackButton(_t("action|retry"))}
                    {this.props.timestamp}
                </div>
            );
        }
        if (this.state.callState === CallState.Connected) {
            return (
                <div className="mx_LegacyCallEvent_content">
                    <Clock seconds={this.state.length} aria-live="off" />
                    {this.props.timestamp}
                </div>
            );
        }
        if (this.state.callState === CallState.Connecting) {
            return (
                <div className="mx_LegacyCallEvent_content">
                    {_t("voip|connecting")}
                    {this.props.timestamp}
                </div>
            );
        }

        return (
            <div className="mx_LegacyCallEvent_content">
                {_t("timeline|m.call.invite|unknown_state")}
                {this.props.timestamp}
            </div>
        );
    }

    public render(): React.ReactNode {
        const event = this.props.mxEvent;
        const sender = event.sender ? event.sender.name : event.getSender();
        const isVoice = this.props.callEventGrouper.isVoice;
        const callType = isVoice ? _t("voip|voice_call") : _t("voip|video_call");
        const callState = this.state.callState;
        const hangupReason = this.props.callEventGrouper.hangupReason;
        const content = this.renderContent();
        const className = classNames("mx_LegacyCallEvent", {
            mx_LegacyCallEvent_voice: isVoice,
            mx_LegacyCallEvent_video: !isVoice,
            mx_LegacyCallEvent_narrow: this.state.narrow,
            mx_LegacyCallEvent_missed: this.props.callEventGrouper.callWasMissed,
            mx_LegacyCallEvent_noAnswer: callState === CallState.Ended && hangupReason === CallErrorCode.InviteTimeout,
            mx_LegacyCallEvent_rejected: callState === CallState.Ended && this.props.callEventGrouper.gotRejected,
        });
        let silenceIcon;
        if (this.state.narrow && this.state.callState === CallState.Ringing) {
            silenceIcon = this.renderSilenceIcon();
        }

        return (
            <div className="mx_LegacyCallEvent_wrapper" ref={this.wrapperElement}>
                <div className={className}>
                    {silenceIcon}
                    <div className="mx_LegacyCallEvent_info">
                        <MemberAvatar member={event.sender} size="32px" />
                        <div className="mx_LegacyCallEvent_info_basic">
                            <div className="mx_LegacyCallEvent_sender">{sender}</div>
                            <div className="mx_LegacyCallEvent_type">
                                <div className="mx_LegacyCallEvent_type_icon" />
                                {callType}
                            </div>
                        </div>
                    </div>
                    {content}
                </div>
            </div>
        );
    }
}