// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.

import React from 'react';

import AdminSettings from './admin_settings.jsx';
import BooleanSetting from './boolean_setting.jsx';
import TextSetting from './text_setting.jsx';

import {FormattedMessage, FormattedHTMLMessage} from 'react-intl';
import SettingsGroup from './settings_group.jsx';
import ClusterTableContainer from './cluster_table_container.jsx';

import * as Utils from 'utils/utils.jsx';

import {Client4} from 'mattermost-redux/client';

export default class ClusterSettings extends AdminSettings {
    constructor(props) {
        super(props);

        this.getConfigFromState = this.getConfigFromState.bind(this);
        this.renderSettings = this.renderSettings.bind(this);
        this.overrideHandleChange = this.overrideHandleChange.bind(this);
    }

    getConfigFromState(config) {
        config.ClusterSettings.Enable = this.state.Enable;
        config.ClusterSettings.ClusterName = this.state.ClusterName;
        config.ClusterSettings.OverrideHostname = this.state.OverrideHostname;
        config.ClusterSettings.UseIpAddress = this.state.UseIpAddress;
        config.ClusterSettings.UseExperimentalGossip = this.state.UseExperimentalGossip;
        config.ClusterSettings.ReadOnlyConfig = this.state.ReadOnlyConfig;
        config.ClusterSettings.GossipPort = this.parseIntNonZero(this.state.GossipPort, 8074);
        config.ClusterSettings.StreamingPort = this.parseIntNonZero(this.state.StreamingPort, 8075);
        return config;
    }

    getStateFromConfig(config) {
        const settings = config.ClusterSettings;

        return {
            Enable: settings.Enable,
            ClusterName: settings.ClusterName,
            OverrideHostname: settings.OverrideHostname,
            UseIpAddress: settings.UseIpAddress,
            UseExperimentalGossip: settings.UseExperimentalGossip,
            ReadOnlyConfig: settings.ReadOnlyConfig,
            GossipPort: settings.GossipPort,
            StreamingPort: settings.StreamingPort,
            showWarning: false
        };
    }

    renderTitle() {
        return (
            <FormattedMessage
                id='admin.advance.cluster'
                defaultMessage='High Availability'
            />
        );
    }

    overrideHandleChange(id, value) {
        this.setState({
            showWarning: true
        });

        this.handleChange(id, value);
    }

    renderSettings() {
        const licenseEnabled = global.window.mm_license.IsLicensed === 'true' && global.window.mm_license.Cluster === 'true';
        if (!licenseEnabled) {
            return null;
        }

        var configLoadedFromCluster = null;

        if (Client4.clusterId) {
            configLoadedFromCluster = (
                <div
                    style={{marginBottom: '10px'}}
                    className='alert alert-warning'
                >
                    <i className='fa fa-warning'/>
                    <FormattedHTMLMessage
                        id='admin.cluster.loadedFrom'
                        defaultMessage='This configuration file was loaded from Node ID {clusterId}. Please see the Troubleshooting Guide in our <a href="http://docs.mattermost.com/deployment/cluster.html" target="_blank">documentation</a> if you are accessing the System Console through a load balancer and experiencing issues.'
                        values={{
                            clusterId: Client4.clusterId
                        }}
                    />
                </div>
            );
        }

        var warning = null;
        if (this.state.showWarning) {
            warning = (
                <div
                    style={{marginBottom: '10px'}}
                    className='alert alert-warning'
                >
                    <i className='fa fa-warning'/>
                    <FormattedHTMLMessage
                        id='admin.cluster.should_not_change'
                        defaultMessage='WARNING: These settings may not sync with the other servers in the cluster. High Availability inter-node communication will not start until you modify the config.json to be identical on all servers and restart Mattermost. Please see the <a href="http://docs.mattermost.com/deployment/cluster.html" target="_blank">documentation</a> on how to add or remove a server from the cluster. If you are accessing the System Console through a load balancer and experiencing issues, please see the Troubleshooting Guide in our <a href="http://docs.mattermost.com/deployment/cluster.html" target="_blank">documentation</a>.'
                    />
                </div>
            );
        }

        var clusterTableContainer = null;
        if (this.state.Enable) {
            clusterTableContainer = (<ClusterTableContainer/>);
        }

        return (
            <SettingsGroup>
                {configLoadedFromCluster}
                {clusterTableContainer}
                <p>
                    <FormattedMessage
                        id='admin.cluster.noteDescription'
                        defaultMessage='Changing properties in this section will require a server restart before taking effect. When High Availability mode is enabled, the System Console is set to read-only and can only be changed from the configuration file unless ReadOnlyConfig is disabled in the configuration file.'
                    />
                </p>
                {warning}
                <BooleanSetting
                    id='Enable'
                    label={
                        <FormattedMessage
                            id='admin.cluster.enableTitle'
                            defaultMessage='Enable High Availability Mode:'
                        />
                    }
                    helpText={
                        <FormattedHTMLMessage
                            id='admin.cluster.enableDescription'
                            defaultMessage='When true, Mattermost will run in High Availability mode. Please see <a href="http://docs.mattermost.com/deployment/cluster.html" target="_blank">documentation</a> to learn more about configuring High Availability for Mattermost.'
                        />
                    }
                    value={this.state.Enable}
                    onChange={this.overrideHandleChange}
                />
                <TextSetting
                    id='ClusterName'
                    label={
                        <FormattedMessage
                            id='admin.cluster.ClusterName'
                            defaultMessage='Cluster Name:'
                        />
                    }
                    placeholder={Utils.localizeMessage('admin.cluster.ClusterNameEx', 'Ex "Production" or "Staging"')}
                    helpText={
                        <FormattedMessage
                            id='admin.cluster.ClusterNameDesc'
                            defaultMessage='The cluster to join by name.  Only nodes with the same cluster name will join together.  This is to support Blue-Green deployments or staging pointing to the same database.'
                        />
                    }
                    value={this.state.ClusterName}
                    onChange={this.overrideHandleChange}
                />
                <TextSetting
                    id='OverrideHostname'
                    label={
                        <FormattedMessage
                            id='admin.cluster.OverrideHostname'
                            defaultMessage='Override Hostname:'
                        />
                    }
                    placeholder={Utils.localizeMessage('admin.cluster.OverrideHostnameEx', 'Ex "app-server-01"')}
                    helpText={
                        <FormattedMessage
                            id='admin.cluster.OverrideHostnameDesc'
                            defaultMessage='The default value of <blank> will attempt to get the Hostname from the OS or use the IP Address.  You can override the hostname of this server with this property.  It is not recommended to override the Hostname unless needed. This property can also be set to a specific IP Address if needed.'
                        />
                    }
                    value={this.state.OverrideHostname}
                    onChange={this.overrideHandleChange}
                />
                <BooleanSetting
                    id='UseIpAddress'
                    label={
                        <FormattedMessage
                            id='admin.cluster.UseIpAddress'
                            defaultMessage='Use IP Address:'
                        />
                    }
                    helpText={
                        <FormattedHTMLMessage
                            id='admin.cluster.UseIpAddressDesc'
                            defaultMessage='When true, the cluster will attempt to communicate via IP Address vs using the hostname.'
                        />
                    }
                    value={this.state.UseIpAddress}
                    onChange={this.overrideHandleChange}
                />
                <BooleanSetting
                    id='UseExperimentalGossip'
                    label={
                        <FormattedMessage
                            id='admin.cluster.UseExperimentalGossip'
                            defaultMessage='Use Experimental Gossip:'
                        />
                    }
                    helpText={
                        <FormattedHTMLMessage
                            id='admin.cluster.UseExperimentalGossipDesc'
                            defaultMessage='When true, the server will attempt to communicate via the gossip protocol over the gossip port.  When false the server will attempt to communicate over the streaming port. When false the gossip port and protocol are still used to determine cluster health.'
                        />
                    }
                    value={this.state.UseExperimentalGossip}
                    onChange={this.overrideHandleChange}
                />
                <BooleanSetting
                    id='ReadOnlyConfig'
                    label={
                        <FormattedMessage
                            id='admin.cluster.ReadOnlyConfig'
                            defaultMessage='Read Only Config:'
                        />
                    }
                    helpText={
                        <FormattedHTMLMessage
                            id='admin.cluster.ReadOnlyConfigDesc'
                            defaultMessage='When true, the server will reject changes made to the configuration file from the system console. When running in production it is recommened to set this to true.'
                        />
                    }
                    value={this.state.ReadOnlyConfig}
                    onChange={this.overrideHandleChange}
                />
                <TextSetting
                    id='GossipPort'
                    label={
                        <FormattedMessage
                            id='admin.cluster.GossipPort'
                            defaultMessage='Gossip Port:'
                        />
                    }
                    placeholder={Utils.localizeMessage('admin.cluster.GossipPortEx', 'Ex "8074"')}
                    helpText={
                        <FormattedMessage
                            id='admin.cluster.GossipPortDesc'
                            defaultMessage='The port used for the gossip protocol.  Both UDP and TCP should abe allowed on this port.'
                        />
                    }
                    value={this.state.GossipPort}
                    onChange={this.overrideHandleChange}
                />
                <TextSetting
                    id='StreamingPort'
                    label={
                        <FormattedMessage
                            id='admin.cluster.StreamingPort'
                            defaultMessage='Streaming Port:'
                        />
                    }
                    placeholder={Utils.localizeMessage('admin.cluster.StreamingPortEx', 'Ex "8075"')}
                    helpText={
                        <FormattedMessage
                            id='admin.cluster.StreamingPortDesc'
                            defaultMessage='The port used for streaming data between servers.'
                        />
                    }
                    value={this.state.StreamingPort}
                    onChange={this.overrideHandleChange}
                />
            </SettingsGroup>
        );
    }
}