/*
Copyright 2015 OpenMarket Ltd

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.
*/

'use strict';

var React = require('react');
var sdk = require('matrix-react-sdk')
var dis = require('matrix-react-sdk/lib/dispatcher');
var MatrixClientPeg = require("matrix-react-sdk/lib/MatrixClientPeg");

module.exports = React.createClass({
    displayName: 'RightPanel',

    Phase : {
        MemberList: 'MemberList',
        FileList: 'FileList',
        MemberInfo: 'MemberInfo',
    },

    componentWillMount: function() {
        this.dispatcherRef = dis.register(this.onAction);
        var cli = MatrixClientPeg.get();
        cli.on("RoomState.members", this.onRoomStateMember);
    },

    componentWillUnmount: function() {
        dis.unregister(this.dispatcherRef);        
        if (MatrixClientPeg.get()) {
            MatrixClientPeg.get().removeListener("RoomState.members", this.onRoomStateMember);
        }
    },

    getInitialState: function() {
        return {
            phase : this.Phase.MemberList
        }
    },

    onMemberListButtonClick: function() {
        if (this.props.collapsed) {
            this.setState({ phase: this.Phase.MemberList });
            dis.dispatch({
                action: 'show_right_panel',
            });
        }
        else {
            dis.dispatch({
                action: 'hide_right_panel',
            });
        }
    },

    onRoomStateMember: function(ev, state, member) {
        // redraw the badge on the membership list
        if (this.state.phase == this.Phase.MemberList && member.roomId === this.props.roomId) {
            this.forceUpdate();
        }
        else if (this.state.phase === this.Phase.MemberInfo && member.roomId === this.props.roomId &&
                member.userId === this.state.member.userId) {
            // refresh the member info (e.g. new power level)
            this.forceUpdate();
        }
    },

    onAction: function(payload) {
        if (payload.action === "view_user") {
            if (payload.member) {
                this.setState({
                    phase: this.Phase.MemberInfo,
                    member: payload.member,
                });
            }
            else {
                this.setState({
                    phase: this.Phase.MemberList
                });
            }
        }
        if (payload.action === "view_room") {
            if (this.state.phase === this.Phase.MemberInfo) {
                this.setState({
                    phase: this.Phase.MemberList
                });
            }
        }
    },

    render: function() {
        var MemberList = sdk.getComponent('rooms.MemberList');
        var buttonGroup;
        var panel;

        var filesHighlight;
        var membersHighlight;
        if (!this.props.collapsed) {
            if (this.state.phase == this.Phase.MemberList || this.state.phase === this.Phase.MemberInfo) {
                membersHighlight = <div className="mx_RightPanel_headerButton_highlight"></div>;
            }
            else if (this.state.phase == this.Phase.FileList) {
                filesHighlight = <div className="mx_RightPanel_headerButton_highlight"></div>;
            }
        }

        var membersBadge;
        if ((this.state.phase == this.Phase.MemberList || this.state.phase === this.Phase.MemberInfo) && this.props.roomId) {
            var cli = MatrixClientPeg.get();
            var room = cli.getRoom(this.props.roomId);
            if (room) {
                membersBadge = <div className="mx_RightPanel_headerButton_badge">{ room.getJoinedMembers().length }</div>;
            }
        }

        if (this.props.roomId) {
            buttonGroup =
                    <div className="mx_RightPanel_headerButtonGroup">
                        <div className="mx_RightPanel_headerButton" onClick={ this.onMemberListButtonClick }>
                            <img src="img/members.svg" width="17" height="22" title="Members" alt="Members"/>
                            { membersBadge }
                            { membersHighlight }
                        </div>
                        <div className="mx_RightPanel_headerButton mx_RightPanel_filebutton">
                            <img src="img/files.svg" width="17" height="22" title="Files" alt="Files"/>
                            { filesHighlight }
                        </div>
                    </div>;

            if (!this.props.collapsed) {
                if(this.state.phase == this.Phase.MemberList) {
                    panel = <MemberList roomId={this.props.roomId} key={this.props.roomId} />
                }
                else if(this.state.phase == this.Phase.MemberInfo) {
                    var MemberInfo = sdk.getComponent('rooms.MemberInfo');
                    panel = <MemberInfo roomId={this.props.roomId} member={this.state.member} key={this.props.roomId} />
                }
            }

        }

        var classes = "mx_RightPanel";
        if (this.props.collapsed) {
            classes += " collapsed";
        }

        return (
            <aside className={classes}>
                <div className="mx_RightPanel_header">
                    { buttonGroup }
                </div>
                { panel }
            </aside>
        );
    }
});