/*
Copyright 2021 Šimon Brandner <simon.bra.ag@gmail.com>

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 { MatrixEvent } from "matrix-js-sdk/src/models/event";
import { _t, _td } from '../../../languageHandler';
import MemberAvatar from '../avatars/MemberAvatar';
import CallEventGrouper, { CallEventGrouperEvent, CustomCallState } from '../../structures/CallEventGrouper';
import AccessibleButton from '../elements/AccessibleButton';
import { CallErrorCode, CallState } from 'matrix-js-sdk/src/webrtc/call';
import InfoTooltip, { InfoTooltipKind } from '../elements/InfoTooltip';
import classNames from 'classnames';
import AccessibleTooltipButton from '../elements/AccessibleTooltipButton';

interface IProps {
    mxEvent: MatrixEvent;
    callEventGrouper: CallEventGrouper;
}

interface IState {
    callState: CallState | CustomCallState;
    silenced: boolean;
}

const TEXTUAL_STATES: Map<CallState | CustomCallState, string> = new Map([
    [CallState.Connected, _td("Connected")],
    [CallState.Connecting, _td("Connecting")],
]);

export default class CallEvent extends React.Component<IProps, IState> {
    constructor(props: IProps) {
        super(props);

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

    componentDidMount() {
        this.props.callEventGrouper.addListener(CallEventGrouperEvent.StateChanged, this.onStateChanged);
        this.props.callEventGrouper.addListener(CallEventGrouperEvent.SilencedChanged, this.onSilencedChanged);
    }

    componentWillUnmount() {
        this.props.callEventGrouper.removeListener(CallEventGrouperEvent.StateChanged, this.onStateChanged);
        this.props.callEventGrouper.removeListener(CallEventGrouperEvent.SilencedChanged, this.onSilencedChanged);
    }

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

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

    private renderContent(state: CallState | CustomCallState): JSX.Element {
        if (state === CallState.Ringing) {
            const silenceClass = classNames({
                "mx_CallEvent_iconButton": true,
                "mx_CallEvent_unSilence": this.state.silenced,
                "mx_CallEvent_silence": !this.state.silenced,
            });

            return (
                <div className="mx_CallEvent_content">
                    <AccessibleTooltipButton
                        className={silenceClass}
                        onClick={this.props.callEventGrouper.toggleSilenced}
                        title={this.state.silenced ? _t("Sound on"): _t("Silence call")}
                    />
                    <AccessibleButton
                        className="mx_CallEvent_content_button mx_CallEvent_content_button_reject"
                        onClick={this.props.callEventGrouper.rejectCall}
                        kind="danger"
                    >
                        <span> { _t("Decline") } </span>
                    </AccessibleButton>
                    <AccessibleButton
                        className="mx_CallEvent_content_button mx_CallEvent_content_button_answer"
                        onClick={this.props.callEventGrouper.answerCall}
                        kind="primary"
                    >
                        <span> { _t("Accept") } </span>
                    </AccessibleButton>
                </div>
            );
        }
        if (state === CallState.Ended) {
            const hangupReason = this.props.callEventGrouper.hangupReason;

            if ([CallErrorCode.UserHangup, "user hangup"].includes(hangupReason) || !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
                return (
                    <div className="mx_CallEvent_content">
                        { _t("This call has ended") }
                    </div>
                );
            }

            let reason;
            if (hangupReason === CallErrorCode.IceFailed) {
                // We couldn't establish a connection at all
                reason = _t("Could not connect media");
            } else if (hangupReason === "ice_timeout") {
                // We established a connection but it died
                reason = _t("Connection failed");
            } else if (hangupReason === CallErrorCode.NoUserMedia) {
                // The other side couldn't open capture devices
                reason = _t("Their device couldn't start the camera or microphone");
            } 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("An unknown error occurred");
            } else if (hangupReason === CallErrorCode.InviteTimeout) {
                reason = _t("No answer");
            } else if (hangupReason === CallErrorCode.UserBusy) {
                reason = _t("The user you called is busy.");
            } else {
                reason = _t('Unknown failure: %(reason)s)', { reason: hangupReason });
            }

            return (
                <div className="mx_CallEvent_content">
                    <InfoTooltip
                        tooltip={reason}
                        className="mx_CallEvent_content_tooltip"
                        kind={InfoTooltipKind.Warning}
                    />
                    { _t("This call has failed") }
                </div>
            );
        }
        if (Array.from(TEXTUAL_STATES.keys()).includes(state)) {
            return (
                <div className="mx_CallEvent_content">
                    { TEXTUAL_STATES.get(state) }
                </div>
            );
        }
        if (state === CustomCallState.Missed) {
            return (
                <div className="mx_CallEvent_content">
                    { _t("You missed this call") }
                    <AccessibleButton
                        className="mx_CallEvent_content_button mx_CallEvent_content_button_callBack"
                        onClick={this.props.callEventGrouper.callBack}
                        kind="primary"
                    >
                        <span> { _t("Call back") } </span>
                    </AccessibleButton>
                </div>
            );
        }

        return (
            <div className="mx_CallEvent_content">
                { _t("The call is in an unknown state!") }
            </div>
        );
    }

    render() {
        const event = this.props.mxEvent;
        const sender = event.sender ? event.sender.name : event.getSender();
        const isVoice = this.props.callEventGrouper.isVoice;
        const callType = isVoice ? _t("Voice call") : _t("Video call");
        const content = this.renderContent(this.state.callState);
        const className = classNames({
            mx_CallEvent: true,
            mx_CallEvent_voice: isVoice,
            mx_CallEvent_video: !isVoice,
        });

        return (
            <div className={className}>
                <div className="mx_CallEvent_info">
                    <MemberAvatar
                        member={event.sender}
                        width={32}
                        height={32}
                    />
                    <div className="mx_CallEvent_info_basic">
                        <div className="mx_CallEvent_sender">
                            { sender }
                        </div>
                        <div className="mx_CallEvent_type">
                            <div className="mx_CallEvent_type_icon" />
                            { callType }
                        </div>
                    </div>
                </div>
                { content }
            </div>
        );
    }
}