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

var Client = require('../../utils/client.jsx');
var Utils = require('../../utils/utils.jsx');
var Constants = require('../../utils/constants.jsx');
var ChannelStore = require('../../stores/channel_store.jsx');
var LoadingScreen = require('../loading_screen.jsx');

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

        this.getHooks = this.getHooks.bind(this);
        this.addNewHook = this.addNewHook.bind(this);
        this.updateChannelId = this.updateChannelId.bind(this);

        this.state = {hooks: [], channelId: ChannelStore.getByName(Constants.DEFAULT_CHANNEL).id, getHooksComplete: false};
    }
    componentDidMount() {
        this.getHooks();
    }
    addNewHook() {
        const hook = {};
        hook.channel_id = this.state.channelId;

        Client.addIncomingHook(
            hook,
            (data) => {
                let hooks = this.state.hooks;
                if (!hooks) {
                    hooks = [];
                }
                hooks.push(data);
                this.setState({hooks});
            },
            (err) => {
                this.setState({serverError: err});
            }
        );
    }
    removeHook(id) {
        const data = {};
        data.id = id;

        Client.deleteIncomingHook(
            data,
            () => {
                const hooks = this.state.hooks;
                let index = -1;
                for (let i = 0; i < hooks.length; i++) {
                    if (hooks[i].id === id) {
                        index = i;
                        break;
                    }
                }

                if (index !== -1) {
                    hooks.splice(index, 1);
                }

                this.setState({hooks});
            },
            (err) => {
                this.setState({serverError: err});
            }
        );
    }
    getHooks() {
        Client.listIncomingHooks(
            (data) => {
                const state = this.state;

                if (data) {
                    state.hooks = data;
                }

                state.getHooksComplete = true;
                this.setState(state);
            },
            (err) => {
                this.setState({serverError: err});
            }
        );
    }
    updateChannelId(e) {
        this.setState({channelId: e.target.value});
    }
    render() {
        let serverError;
        if (this.state.serverError) {
            serverError = <label className='has-error'>{this.state.serverError}</label>;
        }

        const channels = ChannelStore.getAll();
        const options = [];
        channels.forEach((channel) => {
            if (channel.type !== Constants.DM_CHANNEL) {
                options.push(<option value={channel.id}>{channel.name}</option>);
            }
        });

        let disableButton = '';
        if (this.state.channelId === '') {
            disableButton = ' disable';
        }

        const hooks = [];
        this.state.hooks.forEach((hook) => {
            const c = ChannelStore.get(hook.channel_id);
            hooks.push(
                <div className='font--small'>
                    <div className='padding-top x2 divider-light'></div>
                    <div className='padding-top x2'>
                        <strong>{'URL: '}</strong><span className='word-break--all'>{Utils.getWindowLocationOrigin() + '/hooks/' + hook.id}</span>
                    </div>
                    <div className='padding-top'>
                        <strong>{'Channel: '}</strong>{c.name}
                    </div>
                    <div className='padding-top'>
                        <a
                            className={'text-danger'}
                            href='#'
                            onClick={this.removeHook.bind(this, hook.id)}
                        >
                            {'Remove'}
                        </a>
                    </div>
                </div>
            );
        });

        let displayHooks;
        if (!this.state.getHooksComplete) {
            displayHooks = <LoadingScreen/>;
        } else if (hooks.length > 0) {
            displayHooks = hooks;
        } else {
            displayHooks = <label>{': None'}</label>;
        }

        const existingHooks = (
            <div className='padding-top x2'>
                <label className='control-label padding-top x2'>{'Existing incoming webhooks'}</label>
                {displayHooks}
            </div>
        );

        return (
            <div key='addIncomingHook'>
                {'Create webhook URLs for channels and private groups. These URLs can be used by outside applications to create posts in any channels or private groups you have access to. The specified channel will be used as the default.'}
                <br/>
                <label className='control-label'>{'Add a new incoming webhook'}</label>
                <div className='padding-top'>
                    <select
                        ref='channelName'
                        className='form-control'
                        value={this.state.channelId}
                        onChange={this.updateChannelId}
                    >
                        {options}
                    </select>
                    {serverError}
                    <div className='padding-top'>
                        <a
                            className={'btn btn-sm btn-primary' + disableButton}
                            href='#'
                            onClick={this.addNewHook}
                        >
                            {'Add'}
                        </a>
                    </div>
                </div>
                {existingHooks}
            </div>
        );
    }
}