/**
 * ============LICENSE_START========================================================================
 * ONAP : ccsdk feature sdnr wt odlux
 * =================================================================================================
 * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
 * =================================================================================================
 * 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.
 * ============LICENSE_END==========================================================================
 */
import * as React from 'react';
import * as marked from 'marked';
import * as hljs from 'highlight.js';
import { requestRestExt } from '../services/restService';
import { Button, Typography } from '@mui/material';
const defaultRenderer = new marked.Renderer();
defaultRenderer.link = (href, title, text) => (
  `<a target="_blank" rel="noopener noreferrer" href="${href}" title="${title}">${text}</a>`
);
interface AboutState {
  content: string | null;
  isCopiedSuccessfully: boolean;
  isContentLoadedSucessfully: boolean;
}

type odluxVersion= {version:string,build:string, framework: string, 
  applications:{
    configurationApp: string,
    connectApp: string,
    eventLogApp: string,
    faultApp: string,
    helpApp: string,
    inventoryApp: string,
    linkCalculationApp: string,
    maintenanceApp: string,
    mediatorApp: string,
    networkMapApp: string,
    permanceHistoryApp: string
  }};

type topologyVersion = {version: string, buildTimestamp: string};

class AboutComponent extends React.Component<any, AboutState> {
  textarea: React.RefObject<HTMLTextAreaElement>;


  constructor(props: any) {
    super(props);
    this.state = { content: null, isCopiedSuccessfully:false, isContentLoadedSucessfully: false }
    this.textarea = React.createRef();
    this.loadAboutContent();
  }

  private getMarkOdluxVersionMarkdownTable(data:odluxVersion|null|undefined):string{
    if(!data) {
      return "";
    }else{
      let applicationVersions= '';
      if(data.applications){

        applicationVersions = `| Framework | ${data.framework}|\n `+
        `| ConnectApp | ${data.applications.connectApp}|\n `+
        `| FaultApp | ${data.applications.faultApp}|\n `+
        `| MaintenanceApp | ${data.applications.maintenanceApp}|\n `+
        `| ConfigurationApp | ${data.applications.configurationApp}|\n `+
        `| PerformanceHistoryApp | ${data.applications.permanceHistoryApp}|\n `+
        `| InventoryApp | ${data.applications.inventoryApp}|\n `+
        `| EventLogApp | ${data.applications.eventLogApp}|\n `+
        `| MediatorApp | ${data.applications.mediatorApp}|\n `+
        `| NetworkMapApp | ${data.applications.networkMapApp}|\n `+
        `| LinkCalculatorApp | ${data.applications.linkCalculationApp}|\n `+
        `| HelpApp | ${data.applications.helpApp}|\n `;
      }
    
    return `| | |\n| --- | --- |\n| Version | ${data.version} |\n| Build timestamp | ${data.build}|\n`+
    applicationVersions;
    }
  }

  private getTopologyVersionMarkdownTable(data: topologyVersion|null|undefined){ 
    if(!data){
      return "No version";
    }
    else
    {
      const topologyInfo = `| | |\n| --- | --- |\n| Version | ${data.version} |\n` +
                           `| Build timestamp | ${data.buildTimestamp} |\n`;
      return topologyInfo;
    }
  }

  private loadAboutContent(): void {
    const baseUri = window.location.pathname.substring(0,window.location.pathname.lastIndexOf("/")+1);
    const init = {
      'method': 'GET',
      headers: {
        'Content-Type': 'application/json',
        'Accept': 'text/markdown',
      }
    };
    const p1 = requestRestExt<string>('/about',init);
    const p2 = requestRestExt<odluxVersion>(`${baseUri}version.json`);
    const p3 = requestRestExt<any>(`/topology/info/version`);

    Promise.all([p1,p2, p3]).then((responses) => {
      const response = responses[0];
      const response2 = responses[1]; 
      const response3 = responses[2];   
      const content = response.status == 200 ? response.data : `${response.status} ${response.message}` || "Server error";
      const content2 = `\n## ODLUX Version Info\n`+(response2.status == 200 ? this.getMarkOdluxVersionMarkdownTable(response2.data) : `${response2.message}` || "ODLUX Server error");
      const content3 =  `\n## Topology API Version Info\n`+(response3.status == 200 ? this.getTopologyVersionMarkdownTable(response3.data): `Topology API not available`);
      const loadedSucessfully = response.status == 200 ? true : false;
      this.setState({ content: (content + content2 + content3 ) || null, isContentLoadedSucessfully: loadedSucessfully });
    }).catch((error) => {
      this.setState({ content: error })
    })
  }

  copyToClipboard = (e: React.MouseEvent<HTMLButtonElement>) =>{
    e.preventDefault();

    if(this.textarea.current!==null){
      this.textarea.current.select();
      document.execCommand('copy');
      if(e.currentTarget != null){ // refocus on button, otherwhise the textarea would be focused
        e.currentTarget.focus();
      }
      this.setState({isCopiedSuccessfully: true});
      window.setTimeout(()=>{this.setState({isCopiedSuccessfully: false});},2000);
    }
  }

  render() {

    const markedOptions: marked.MarkedOptions = {
      gfm: true,
      breaks: false,
      pedantic: false,
      sanitize: true,
      smartLists: true,
      smartypants: false,
      langPrefix: 'hljs ',
      ...({}),
      highlight: (code, lang) => {
        if (!!(lang && hljs.getLanguage(lang))) {
          return hljs.highlight(lang, code).value;
        }
        return code;
      }
    };


    const className = "about-table"
    const style: React.CSSProperties = {};
    const containerStyle = { overflow: "auto", paddingRight: "20px" }

    const html = (marked(this.state.content || 'loading', { renderer: markedOptions && markedOptions.renderer || defaultRenderer }));

    return (
      <div style={containerStyle}>
        { this.state.isContentLoadedSucessfully &&
        <div style={{float: "right", marginRight: "10px"}}>
        <Button color="inherit" variant="contained" onClick={e => this.copyToClipboard(e)}>
           Copy to clipboard
        </Button>
          {
            this.state.isCopiedSuccessfully && 
            <Typography variant="body1" style={{color: "green"}} align="center">
             copied successfully
            </Typography>
          }
        </div>
      }
       
        <div
          dangerouslySetInnerHTML={{ __html: html }}
          className={className}
          style={style}
        />
         <form>
          <textarea
           style={{opacity: ".01"}}
            ref={this.textarea}
            value={this.state.content || ''}
          />
        </form>
      </div>
    );
  }
};

export const About = AboutComponent;
export default About;