//
// Copyright (C) Stanislaw Adaszewski, 2020
// Contact: s.adaszewski@gmail.com
// Website: https://adared.ch/wba
// License: GNU Affero General Public License, Version 3
//

import { h, Component, createRef } from 'preact';
import WBNavbarCommon from 'wb-navbar-common';
import WBArvadosCrumbs from 'wb-arvados-crumbs';
import WBNameAndUuid from 'wb-name-and-uuid';
import WBSelect from 'wb-select';
import WBTable from 'wb-table';
import WBPickObjectDialog from 'wb-pick-object-dialog';
import makeArvadosRequest from 'make-arvados-request';

class WBSharingPage extends Component {
  constructor(...args) {
    super(...args);
    this.state.rows = [];
    this.dialogRef = createRef();
  }

  componentDidMount() {
    this.fetchData();
  }

  fetchData() {
    const { app, uuid } = this.props;
    const { arvHost, arvToken } = app.state;
    let prom = makeArvadosRequest(arvHost, arvToken,
      '/arvados/v1/permissions/' + encodeURIComponent(uuid) +
      '?limit=100000');
    prom = prom.then(xhr => this.setState({
      'entries': xhr.response.items,
      'rows': this.prepareRows(xhr.response.items)
    }));
  }

  deleteEntry(it) {
    it._delete = true;
    this.setState({ rows: this.prepareRows(this.state.entries) });
  }

  prepareRows(items) {
    const { app } = this.props;
    return items.filter(it => (!it._delete)).map(it => [
      ( <WBNameAndUuid app={ app } uuid={ it.tail_uuid } /> ),
      ( <WBSelect value={ it.name }
          options={ ['can_read', 'can_write', 'can_manage'] }
          onChange={ e => this.modifyEntry(it, e.target.value) } /> ),
      ( <button class="btn btn-outline-danger m-1" title="Delete"
        onclick={ () => this.deleteEntry(it) }>
        <i class="fas fa-trash"></i>
      </button> )
    ]);
  }

  modifyEntry(it, newPermissionName) {
    it.name = newPermissionName;
    it._dirty = true;
    // this.setState({ rows: this.prepareRows(this.state.entries) });
  }

  addEntry(it, permissionName='can_read') {
    // throw Error('Not implemented');
    const { uuid } = this.props;
    let { entries } = this.state;
    if (entries.filter(e => (e.tail_uuid === it.uuid)).length > 0)
      return; // already in the list
    const e = {
      //_dirty: true,
      link_class: 'permission',
      head_uuid: uuid,
      tail_uuid: it.uuid,
      name: permissionName
    };
    entries = entries.concat([e]);
    this.setState({
      entries,
      rows: this.prepareRows(entries)
    });
  }

  disableControls() {
    $('input, select, button').attr('disabled', 'disabled');
    $('a').each(function() { $(this).data('old_href', $(this).attr('href')); });
    $('a').attr('href', null);
  }

  enableControls() {
    $('input, select, button').attr('disabled', null);
    $('a').each(function() { $(this).attr('href', $(this).data('old_href')); });
  }

  save() {
    const { entries } = this.state;
    const { arvHost, arvToken } = this.props.app.state;
    let prom = new Promise(accept => accept());
    this.disableControls();
    this.setState({ working: true });
    for (let i = 0; i < entries.length; i++) {
      const e = entries[i];

      //if (!e._dirty && !e._delete)
        //continue;

      if (!e.uuid) {
        prom = prom.then(() => makeArvadosRequest(arvHost, arvToken,
          '/arvados/v1/links',
          { 'method': 'POST',
            'data': JSON.stringify({
              'link_class': 'permission',
              'head_uuid': e.head_uuid,
              'tail_uuid': e.tail_uuid,
              'name': e.name
            }) }));

      } else if (e._delete) {
        prom = prom.then(() => makeArvadosRequest(arvHost, arvToken,
          '/arvados/v1/links/' + e.uuid,
          { 'method': 'DELETE' }));

      } else if (e._dirty) {
        prom = prom.then(() => makeArvadosRequest(arvHost, arvToken,
          '/arvados/v1/links/' + e.uuid,
          { 'method': 'PUT',
            'data': JSON.stringify({
              'name': e.name
            }) }));
      }
      prom = prom.catch(() => {});
    }
    prom = prom.then(() => {
      this.enableControls();
      this.fetchData();
      this.setState({ working: false });
    });
  }

  render({ app, uuid }, { rows, working }) {
    return (
      <div>
        <WBNavbarCommon app={ app } />

        <WBArvadosCrumbs app={ app } uuid={ uuid } />

        <div class="container-fluid">
          <div class="my-2">
            This is the sharing management page for { uuid }
          </div>

          <WBTable columns={ [ 'Name', 'Permission', '' ] }
            headerClasses={ [ null, null, 'w-1' ] }
            rows={ rows } />

          <WBPickObjectDialog app={ app } ref={ this.dialogRef } />

          { working ? (<div class="progress my-2">
            <div class={ 'progress-bar progress-bar-striped progress-bar-animated' }
              role="progressbar" aria-valuenow="100" aria-valuemin="0"
              aria-valuemax="100" style="width: 100%"></div>
          </div>) : null }

          <button class="btn btn-outline-secondary mr-2"
            onclick={ () => this.dialogRef.current.show('Select User', 'user', it => this.addEntry(it)) }>Add User...</button>
          <button class="btn btn-outline-secondary mr-2"
            onclick={ () => this.dialogRef.current.show('Select Group', 'group', it => this.addEntry(it), [['group_class', '=', 'role']]) }>Add Group...</button>
          <button class="btn btn-primary mr-2"
            onclick={ () => this.save() }>Save</button>
        </div>
      </div>
    );
  }
}

export default WBSharingPage;