import React, {Component} from 'react';
import { connect } from 'react-redux';

function mapDispatchToProps(dispatch){
  return {
    action: (x) => {
      dispatch(x)
    },
  }
}

function mapStateToProps(store) {
  return {
    tree: store.tree
  };
}

class Structure extends Component {
  state = {
  	update: false,
  	drag: false,
    popup: {display:'none', position: 'fixed', left:0, top:0, zIndex: 10}
  }
  componentDidMount(){/*
    let interval = 1500;
    setInterval(()=>{
      this.setState({ update: !this.state.update })
    }, interval);*/
    window.document.addEventListener('click', this.contextMenuHide.bind(this), false);
    this.refs.main.setAttribute('onclick', 'tree_toggle(arguments[0])');
  }
  update(){
  	this.setState({ update: !this.state.update })
  }
  contextMenuShow(id, e) {
    e.preventDefault();
    this.refs.create.setAttribute('data-create', id);
    this.refs.edit.setAttribute('data-edit', id);
    this.refs.del.setAttribute('data-del', id);

    let pos = {display:'block', position: 'fixed', left: e.pageX+'px', top: e.pageY-window.scrollY+'px'};
    this.setState({popup: pos})
  }
  contextMenuHide(e) {
    let pos = {display:'none', position: 'fixed', left: e.pageX+'px', top: e.pageY+'px'};
    this.setState({popup: pos})
  }
  getPropId(){
    let id = this.refs.edit.getAttribute('data-edit');
    this.editFree(id)
  }
  editFree(id){
    this.props.action({
      type: 'editId',
      data: id
    })
    this.props.action({
      type: 'newBranch',
      data: null
    })
  }
  addBranch0(){
    this.props.action({
      type: 'editId',
      data: '0'
    })
    this.props.action({
      type: 'newBranch',
      data: '0'
    })
  }
  addBranch(){
    let id = this.refs.create.getAttribute('data-create');
    this.props.action({
      type: 'editId',
      data: id
    })
    this.props.action({
      type: 'newBranch',
      data: id
    })
  }
  delBranch(){
    let id = this.refs.del.getAttribute('data-del');
    this.props.action({
      type: 'delBranch',
      data: { id: id }
    })
  }
  DragStart(el, e){
    let img = e.target.getElementsByClassName('Content')[0];
  	e.dataTransfer.effectAllowed = 'move';
  	e.dataTransfer.setDragImage(img,10,5);
    e.dataTransfer.setData('application/text', JSON.stringify(el) );
    this.setState({ drag: true });
    e.stopPropagation();
  }
  DragEnter(e){
    if (e.target.className != 'Content') return false;
    e.target.style.color = '#f00';
  }
  DragLeave(e){
  	if (e.target.className != 'Content') return false;
    e.target.style.color = '#000'
  }
  DragEnd(e){

  }
  DragOver(e){
    e.preventDefault();
  }
  onDrop(parent, e){
    if (!e) return;
    let elMv = JSON.parse(e.dataTransfer.getData('application/text') );
    if (parent.id == elMv.id) return;

    e.target.style.color = '#000';

    if (parent == 'del') {
      this.props.action({
        type: 'delBranch',
        data: elMv
      })
    }
    else {
      this.props.action({
        type: 'editParent',
        data: {
        	parent: parent,
        	children: elMv
        }
      })
    }

    this.setState({ drag: false });
    e.preventDefault();
    e.stopPropagation();
  }
  DragSpace(){
  	return(
      <div>
        <div className="drag"
        		    onDragOver={this.DragOver.bind(this)}
                onDrop={this.onDrop.bind(this, { id: 0} )} >
          <strong>Переместить в корень</strong>
        </div>
        <div className="drag"
                onDragOver={this.DragOver.bind(this)}
                onDrop={this.onDrop.bind(this, 'del')} >
          <strong>Удалить</strong>
        </div>
      </div>
  	)
  }
  renderTree(id){
    const {tree} = this.props;
    return tree.map((el, i, arr) => {

      if (id == el.parent) {

        let nextPar = arr[i+1] ? arr[i+1].parent : null;

        function Parent(){
          let last = true;

          tree.map(el_2 => {
            if (el.id == el_2.parent) {
              last = false
            }
          })

          if (last) {
            if (el.parent == nextPar) {
              return 'Node ExpandLeaf'
            }
            else {
              return 'Node ExpandLeaf IsLast'
            }
          }
          if (el.parent == nextPar) {
            return 'Node ExpandClosed'
          }
          else {
            return 'Node ExpandClosed IsLast'
          }
        }

        return(
          <ul className="Container" key={el.id} >
            <li className={Parent()} draggable="true"
                onDragStart={this.DragStart.bind(this, el)}
                onDragEnter={this.DragEnter.bind(this)}
                onDragLeave={this.DragLeave.bind(this)}
                onDragEnd={this.DragEnd.bind(this)}
                onDragOver={this.DragOver.bind(this)}
                onDrop={this.onDrop.bind(this, el)} >
              <div className="Expand"></div>
              <div className="Content" onContextMenu={this.contextMenuShow.bind(this, el.id)} onClick={this.editFree.bind(this, el.id)}>{el.key}</div>
              { this.renderTree(el.id) }
            </li>
          </ul>
        )
      }
    })
  }
  renderRoot(){
  	let tree = this.props.tree.sort((a, b) => {
      if( a.parent == b.parent ){
        return a.id - b.id
      }
      else{
        return a.parent - b.parent
      }
    });
  	return tree.map((el, i, tree) => {
      let nextPar = tree[i+1] ? tree[i+1].parent : null;
      let check = 'ExpandLeaf';
      tree.forEach(el_2 => {
        if(el.id == el_2.parent)
          check = 'ExpandClosed';
      })
      if (!el.parent)
        return(
          <li className={el.parent == nextPar ? 'Node IsRoot '+check : 'Node IsRoot '+check+' IsLast'} key={i}
                draggable="true"
                onDragStart={this.DragStart.bind(this, el)}
                onDragEnter={this.DragEnter.bind(this)}
                onDragLeave={this.DragLeave.bind(this)}
                onDragEnd={this.DragEnd.bind(this)}
                onDragOver={this.DragOver.bind(this)}
                onDrop={this.onDrop.bind(this, el)} >
              <div className="Expand"></div>
              <div className="Content" onContextMenu={this.contextMenuShow.bind(this, el.id)} onClick={this.editFree.bind(this, el.id)}>{el.key}</div>
              {this.renderTree( el.id)}
          </li>
        )
    })
  }
  render(){

    return(
      <div ref="main">
      <div style={{cursor: 'pointer'}} onClick={ function(){this.update(); this.addBranch0() }.bind(this) }>Скрипт диалогов</div>
        <ul className="Container">
          {this.renderRoot()}
        </ul>
        {this.state.drag ? this.DragSpace() : null}
        <ul className="list-ul" style={this.state.popup}>
          <li ref="edit" data-edit="" onClick={this.getPropId.bind(this)}>Редактировать</li>
          <li ref="create" data-create="" onClick={this.addBranch.bind(this)}>Создать дочерний элемент</li>
          <li ref="del" data-del="" onClick={this.delBranch.bind(this)}>Удалить</li>
        </ul>
      </div>
    )
  }
}

export default connect(mapStateToProps,mapDispatchToProps)(Structure)