import React from 'react';
import { withRouter } from 'react-router-dom';
import {
  Branch,
  Changeset,
  PagedCollection,
  Repository,
} from '@scm-manager/ui-types';
import {
  fetchChangesets,
  getChangesets,
  getFetchChangesetsFailure,
  isFetchChangesetsPending,
  selectListAsCollection,
} from '../modules/changesets';

import { connect } from 'react-redux';
import {
  ErrorNotification,
  getPageFromMatch,
  LinkPaginator,
  ChangesetList,
  Loading,
  Notification,
} from '@scm-manager/ui-components';
import { compose } from 'redux';
import { translate } from 'react-i18next';

type Props = {
  repository: Repository;
  branch: Branch;
  page: number;

  // State props
  changesets: Changeset[];
  list: PagedCollection;
  loading: boolean;
  error: Error;

  // Dispatch props
  fetchChangesets: (p1: Repository, p2: Branch, p3: number) => void;

  // context props
  match: any;
  t: (p: string) => string;
};

class Changesets extends React.Component<Props> {
  componentDidMount() {
    const { fetchChangesets, repository, branch, page } = this.props;

    fetchChangesets(repository, branch, page);
  }

  render() {
    const { changesets, loading, error, t } = this.props;

    if (error) {
      return <ErrorNotification error={error} />;
    }

    if (loading) {
      return <Loading />;
    }

    if (!changesets || changesets.length === 0) {
      return (
        <div className="panel-block">
          <Notification type="info">
            {t('changesets.noChangesets')}
          </Notification>
        </div>
      );
    }
    return (
      <>
        {this.renderList()}
        {this.renderPaginator()}
      </>
    );
  }

  renderList = () => {
    const { repository, changesets } = this.props;
    return (
      <div className="panel-block">
        <ChangesetList repository={repository} changesets={changesets} />
      </div>
    );
  };

  renderPaginator = () => {
    const { page, list } = this.props;
    if (list) {
      return (
        <div className="panel-footer">
          <LinkPaginator page={page} collection={list} />
        </div>
      );
    }
    return null;
  };
}

const mapDispatchToProps = dispatch => {
  return {
    fetchChangesets: (repo: Repository, branch: Branch, page: number) => {
      dispatch(fetchChangesets(repo, branch, page));
    },
  };
};

const mapStateToProps = (state: any, ownProps: Props) => {
  const { repository, branch, match } = ownProps;
  const changesets = getChangesets(state, repository, branch);
  const loading = isFetchChangesetsPending(state, repository, branch);
  const error = getFetchChangesetsFailure(state, repository, branch);
  const list = selectListAsCollection(state, repository, branch);
  const page = getPageFromMatch(match);

  return {
    changesets,
    list,
    page,
    loading,
    error,
  };
};

export default compose(
  translate('repos'),
  withRouter,
  connect(
    mapStateToProps,
    mapDispatchToProps,
  ),
)(Changesets);