// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.

import PostStore from '../stores/post_store.jsx';
import UserStore from '../stores/user_store.jsx';
import PreferenceStore from '../stores/preference_store.jsx';
import * as Utils from '../utils/utils.jsx';
import SearchBox from './search_bar.jsx';
import CreateComment from './create_comment.jsx';
import RhsHeaderPost from './rhs_header_post.jsx';
import RootPost from './rhs_root_post.jsx';
import Comment from './rhs_comment.jsx';
import Constants from '../utils/constants.jsx';
import FileUploadOverlay from './file_upload_overlay.jsx';

export default class RhsThread extends React.Component {
    constructor(props) {
        super(props);

        this.mounted = false;

        this.onPostChange = this.onPostChange.bind(this);
        this.onUserChange = this.onUserChange.bind(this);
        this.forceUpdateInfo = this.forceUpdateInfo.bind(this);
        this.handleResize = this.handleResize.bind(this);

        const state = {};
        state.windowWidth = Utils.windowWidth();
        state.windowHeight = Utils.windowHeight();
        state.selected = PostStore.getSelectedPost();
        state.posts = PostStore.getSelectedPostThread();
        state.profiles = JSON.parse(JSON.stringify(UserStore.getProfiles()));

        this.state = state;
    }
    componentDidMount() {
        PostStore.addSelectedPostChangeListener(this.onPostChange);
        PostStore.addChangeListener(this.onPostChange);
        PreferenceStore.addChangeListener(this.forceUpdateInfo);
        UserStore.addChangeListener(this.onUserChange);

        this.resize();
        window.addEventListener('resize', this.handleResize);

        this.mounted = true;
    }
    componentDidUpdate() {
        if ($('.post-right__scroll')[0]) {
            $('.post-right__scroll').scrollTop($('.post-right__scroll')[0].scrollHeight);
        }
        this.resize();
    }
    componentWillUnmount() {
        PostStore.removeSelectedPostChangeListener(this.onPostChange);
        PostStore.removeChangeListener(this.onPostChange);
        PreferenceStore.removeChangeListener(this.forceUpdateInfo);
        UserStore.removeChangeListener(this.onUserChange);

        window.removeEventListener('resize', this.handleResize);

        this.mounted = false;
    }
    shouldComponentUpdate(nextProps, nextState) {
        if (!Utils.areObjectsEqual(nextState.posts, this.state.posts)) {
            return true;
        }

        if (!Utils.areObjectsEqual(nextState.selected, this.state.selected)) {
            return true;
        }

        if (!Utils.areObjectsEqual(nextState.profiles, this.state.profiles)) {
            return true;
        }

        return false;
    }
    forceUpdateInfo() {
        if (this.state.postList) {
            for (var postId in this.state.postList.posts) {
                if (this.refs[postId]) {
                    this.refs[postId].forceUpdate();
                }
            }
        }
    }
    handleResize() {
        this.setState({
            windowWidth: Utils.windowWidth(),
            windowHeight: Utils.windowHeight()
        });
    }
    onPostChange() {
        const selected = PostStore.getSelectedPost();
        const posts = PostStore.getSelectedPostThread();
        this.setState({posts, selected});
    }
    onUserChange() {
        const profiles = JSON.parse(JSON.stringify(UserStore.getProfiles()));
        this.setState({profiles});
    }
    resize() {
        $('.post-right__scroll').scrollTop(100000);
        if (this.state.windowWidth > 768) {
            $('.post-right__scroll').perfectScrollbar();
            $('.post-right__scroll').perfectScrollbar('update');
        }
    }
    render() {
        const posts = this.state.posts;
        const selected = this.state.selected;
        const profiles = this.state.profiles || {};

        if (posts == null || selected == null) {
            return (
                <div></div>
            );
        }

        var postsArray = [];

        for (const id in posts) {
            if (posts.hasOwnProperty(id)) {
                const cpost = posts[id];
                if (cpost.root_id === selected.id) {
                    postsArray.push(cpost);
                }
            }
        }

        // sort failed posts to bottom, followed by pending, and then regular posts
        postsArray.sort(function postSort(a, b) {
            if ((a.state === Constants.POST_LOADING || a.state === Constants.POST_FAILED) && (b.state !== Constants.POST_LOADING && b.state !== Constants.POST_FAILED)) {
                return 1;
            }
            if ((a.state !== Constants.POST_LOADING && a.state !== Constants.POST_FAILED) && (b.state === Constants.POST_LOADING || b.state === Constants.POST_FAILED)) {
                return -1;
            }

            if (a.state === Constants.POST_LOADING && b.state === Constants.POST_FAILED) {
                return -1;
            }
            if (a.state === Constants.POST_FAILED && b.state === Constants.POST_LOADING) {
                return 1;
            }

            if (a.create_at < b.create_at) {
                return -1;
            }
            if (a.create_at > b.create_at) {
                return 1;
            }
            return 0;
        });

        var currentId = UserStore.getCurrentId();
        var searchForm;
        if (currentId != null) {
            searchForm = <SearchBox/>;
        }

        let profile;
        if (UserStore.getCurrentId() === selected.user_id) {
            profile = UserStore.getCurrentUser();
        } else {
            profile = profiles[selected.user_id];
        }

        return (
            <div className='post-right__container'>
                <FileUploadOverlay overlayType='right'/>
                <div className='search-bar__container sidebar--right__search-header'>{searchForm}</div>
                <div className='sidebar-right__body'>
                    <RhsHeaderPost
                        fromSearch={this.props.fromSearch}
                        isMentionSearch={this.props.isMentionSearch}
                    />
                    <div className='post-right__scroll'>
                        <RootPost
                            ref={selected.id}
                            post={selected}
                            commentCount={postsArray.length}
                            user={profile}
                        />
                        <div className='post-right-comments-container'>
                        {postsArray.map(function mapPosts(comPost) {
                            let p;
                            if (UserStore.getCurrentId() === comPost.user_id) {
                                p = UserStore.getCurrentUser();
                            } else {
                                p = profiles[comPost.user_id];
                            }
                            return (
                                <Comment
                                    ref={comPost.id}
                                    key={comPost.id + 'commentKey'}
                                    post={comPost}
                                    user={p}
                                />
                            );
                        })}
                        </div>
                        <div className='post-create__container'>
                            <CreateComment
                                channelId={selected.channel_id}
                                rootId={selected.id}
                            />
                        </div>
                    </div>
                </div>
            </div>
        );
    }
}

RhsThread.defaultProps = {
    fromSearch: '',
    isMentionSearch: false
};

RhsThread.propTypes = {
    fromSearch: React.PropTypes.string,
    isMentionSearch: React.PropTypes.bool
};
