import React from 'react';
import PropTypes from 'prop-types';
import { Link } from 'react-router-dom';
import { NgIf, Icon, EventEmitter, EventReceiver } from './';
import ReactCSSTransitionGroup from 'react-addons-css-transition-group';

import './breadcrumb.scss';

export class BreadCrumb extends React.Component {
    constructor(props){
        super(props);
        this.state = {
            path: this._formatPath(props.path)
        };
    }

    componentWillReceiveProps(props){
        this.setState({path: this._formatPath(props.path)});
    }

    _formatPath(full_path){
        let paths = full_path.split("/");
        if(paths.slice(-1)[0] === ''){
            paths.pop();
        }
        paths = paths.map((path, index) => {
            let sub_path = paths.slice(0, index+1).join('/'),
                label = path === '' ? (CONFIG.name || 'Filestash') : path;
            if(index === paths.length - 1){
                return {full: null, label: label};
            }else{
                return {
                    full: sub_path+'/',
                    label: label,
                    minify: function(){
                        if(index === 0){ return false; }
                        if(paths.length <= (document.body.clientWidth > 800 ? 5 : 4)){ return false; }
                        if(index > paths.length - (document.body.clientWidth > 1000? 4 : 3)) return false;
                        return true;
                    }()
                };
            }
        });
        return paths;
    }

    render(Element) {
        if(new window.URL(location.href).searchParams.get("nav") === "false") return null;

        const Path = Element? Element : PathElement;
        return (
            <div className="component_breadcrumb" role="navigation">
              <BreadCrumbContainer className={this.props.className+' no-select'}>
                <Logout />
                <ReactCSSTransitionGroup transitionName="breadcrumb" transitionLeave={true} transitionEnter={true} transitionLeaveTimeout={150} transitionEnterTimeout={200} transitionAppear={false}>
                  {
                      this.state.path.map((path, index) => {
                          return (
                              <Path key={"breadcrumb_"+index} currentSelection={this.props.currentSelection} path={path} isLast={this.state.path.length === index + 1} needSaving={this.props.needSaving} />
                          );
                      })
                }
               </ReactCSSTransitionGroup>
             </BreadCrumbContainer>
           </div>
        );
    }
}

BreadCrumb.propTypes = {
    path: PropTypes.string.isRequired,
    needSaving: PropTypes.bool
}


const BreadCrumbContainer = (props) => {
    return (
        <div className={props.className}>
          <div className="ul">
            {props.children}
          </div>
        </div>
    );
}
const Logout = (props) => {
    const isRunningFromAnIframe = window.self !== window.top;
    if(isRunningFromAnIframe) return null;
    return (
        <div className="li component_logout">
          <Link to="/logout">
            <Icon name="power"/>
          </Link>
        </div>
    );
}

const Saving = (props) => {
    return (
        <ReactCSSTransitionGroup transitionName="saving_indicator" transitionLeave={true} transitionEnter={true} transitionAppear={true} transitionLeaveTimeout={200} transitionEnterTimeout={500} transitionAppearTimeout={500}>
          <NgIf key={props.needSaving} className="component_saving" cond={props.needSaving === true}>
            *
          </NgIf>
        </ReactCSSTransitionGroup>
    );
}

const Separator = (props) => {
    return (
        <div className="component_separator">
          <img alt="path_separator" width="16" height="16" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABEAAAARCAYAAAA7bUf6AAAA30lEQVQ4T63T7Q2CMBAG4OuVPdQNcAPdBCYwDdclCAQ3ACfRDXQDZQMHgNRcAoYApfWjv0jIPX3b3gn4wxJjI03TUAhRBkGwV0o9ffaYIEVRrJumuQHA3ReaILxzl+bCkNZ660ozi/QQIl4BoCKieAmyIlyU53lkjCld0CIyhIwxSmt9nEvkRLgoyzIuPggh4iRJqjHkhXTQAwBWUsqNUoq/38sL+TlJf7lf38ngdU5EFNme2adPFgGGrR2LiGcAqIko/LhjeXbatuVOraWUO58hnJ1iRKx8AetxXPHH/1+y62USursaSgAAAABJRU5ErkJggg=="/>
        </div>
    );
}


@EventEmitter
export class PathElementWrapper extends React.Component {
    constructor(props){
        super(props);
    }

    limitSize(str, is_highlight = false){
        if(is_highlight === true){
            if(str.length > 30){
                return str.substring(0,12).trim()+'...'+str.substring(str.length - 10, str.length).trim();
            }
        }else{
            if(str.length > 27){
                return str.substring(0,20).trim()+'...';
            }
        }
        return str;
    }

    render(){
        let className = "component_path-element-wrapper";
        if(this.props.highlight) { className += " highlight"; }

        let href = "/files" + (this.props.path.full || "")
        href = href
            .replace(/\%/g, "%2525") // Hack to get the Link Component to work
                                     // See ExistingThing in 'thing-existing.js'
            .replace(/#/g, "%23")
            .replace(/\?/g, "%3F");
        href = href || "/"
        href += location.search;

        return (
            <div className={"li "+className}>
              <NgIf cond={this.props.isLast === false}>
                <Link to={href} className="label">
                  <NgIf cond={this.props.path.minify !== true}>
                    {this.limitSize(this.props.path.label)}
                  </NgIf>
                  <NgIf cond={this.props.path.minify === true}>
                    ...
                    <span className="title">
                      {this.limitSize(this.props.path.label, true)}
                    </span>
                  </NgIf>
                </Link>
                <Separator/>
              </NgIf>
              <NgIf cond={this.props.isLast === true} className="label">
                {this.limitSize(this.props.path.label)}
                <Saving needSaving={this.props.needSaving} />
              </NgIf>
            </div>
        );
    }
}


// just a hack to make it play nicely with react-dnd as it refuses to use our custom component if it's not wrap by something it knows ...
export class PathElement extends PathElementWrapper {
    constructor(props){
        super(props);
    }

    render(highlight = false){
        let className = "component_path-element";
        if(this.props.isLast){
            className += " is-last";
        }
        return (
            <div className={className}>
              <PathElementWrapper highlight={highlight} {...this.props} />
            </div>
        );
    }
}