import React, { useState } from 'react';
import ReactFlow, {
  ReactFlowProvider,
  addEdge,
  removeElements,
  Controls,
} from 'react-flow-renderer';

import Sidebar from './Sidebar';

import './provider.css';

const onElementClick = (event, element) => console.log('click', element);
const onLoad = (reactFlowInstance) =>
  console.log('flow loaded:', reactFlowInstance);

const initialElements = [
  {
    id: 'provider-1',
    type: 'input',
    data: { label: 'Node 1' },
    position: { x: 250, y: 5 },
  },
  { id: 'provider-2', data: { label: 'Node 2' }, position: { x: 100, y: 100 } },
  { id: 'provider-3', data: { label: 'Node 3' }, position: { x: 400, y: 100 } },
  { id: 'provider-4', data: { label: 'Node 4' }, position: { x: 400, y: 200 } },
  {
    id: 'provider-e1-2',
    source: 'provider-1',
    target: 'provider-2',
    animated: true,
  },
  { id: 'provider-e1-3', source: 'provider-1', target: 'provider-3' },
];

const ProviderFlow = () => {
  const [elements, setElements] = useState(initialElements);
  const onConnect = (params) => setElements((els) => addEdge(params, els));
  const onElementsRemove = (elementsToRemove) =>
    setElements((els) => removeElements(elementsToRemove, els));

  return (
    <div className="providerflow">
      <ReactFlowProvider>
        <div className="reactflow-wrapper">
          <ReactFlow
            elements={elements}
            onElementClick={onElementClick}
            onConnect={onConnect}
            onElementsRemove={onElementsRemove}
            onLoad={onLoad}
          >
            <Controls />
          </ReactFlow>
        </div>
        <Sidebar />
      </ReactFlowProvider>
    </div>
  );
};

export default ProviderFlow;

import React from 'react';
import { useStoreState, useStoreActions } from 'react-flow-renderer';

export default () => {
  const nodes = useStoreState((store) => store.nodes);
  const transform = useStoreState((store) => store.transform);
  const setSelectedElements = useStoreActions((actions) => actions.setSelectedElements);

  const selectAll = () => {
    setSelectedElements(nodes.map((node) => ({ id: node.id, type: node.type })));
  };

  return (
    <aside>
      <div className="description">
        This is an example of how you can access the internal state outside of the ReactFlow component.
      </div>
      <div className="title">Zoom & pan transform</div>
      <div className="transform">
        [{transform[0].toFixed(2)}, {transform[1].toFixed(2)}, {transform[2].toFixed(2)}]
      </div>
      <div className="title">Nodes</div>
      {nodes.map((node) => (
        <div key={node.id}>
          Node {node.id} - x: {node.__rf.position.x.toFixed(2)}, y: {node.__rf.position.y.toFixed(2)}
        </div>
      ))}

      <div className="selectall">
        <button onClick={selectAll}>select all nodes</button>
      </div>
    </aside>
  );
};