import React from 'react';
import {
  ErrorNotification,
  Loading,
  Subtitle,
} from '@scm-manager/ui-components';
import { translate } from 'react-i18next';
import BranchForm from '../components/BranchForm';
import { Repository, Branch, BranchRequest } from '@scm-manager/ui-types';
import {
  fetchBranches,
  getBranches,
  getBranchCreateLink,
  createBranch,
  createBranchReset,
  isCreateBranchPending,
  getCreateBranchFailure,
  isFetchBranchesPending,
  getFetchBranchesFailure,
} from '../modules/branches';
import { History } from 'history';
import { connect } from 'react-redux';
import { withRouter } from 'react-router-dom';
import queryString from 'query-string';

type Props = {
  loading?: boolean;
  error?: Error;
  repository: Repository;
  branches: Branch[];
  createBranchesLink: string;
  isPermittedToCreateBranches: boolean;

  // dispatcher functions
  fetchBranches: (p: Repository) => void;
  createBranch: (
    createLink: string,
    repository: Repository,
    branch: BranchRequest,
    callback?: (p: Branch) => void,
  ) => void;
  resetForm: (p: Repository) => void;

  // context objects
  t: (p: string) => string;
  history: History;
  location: any;
};

class CreateBranch extends React.Component<Props> {
  componentDidMount() {
    const { fetchBranches, repository } = this.props;
    fetchBranches(repository);
    this.props.resetForm(repository);
  }

  branchCreated = (branch: Branch) => {
    const { history, repository } = this.props;
    history.push(
      `/repo/${repository.namespace}/${
        repository.name
      }/branch/${encodeURIComponent(branch.name)}/info`,
    );
  };

  createBranch = (branch: BranchRequest) => {
    this.props.createBranch(
      this.props.createBranchesLink,
      this.props.repository,
      branch,
      newBranch => this.branchCreated(newBranch),
    );
  };

  transmittedName = (url: string) => {
    const params = queryString.parse(url);
    return params.name;
  };

  render() {
    const {
      t,
      loading,
      error,
      repository,
      branches,
      createBranchesLink,
      location,
    } = this.props;

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

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

    return (
      <>
        <Subtitle subtitle={t('branches.create.title')} />
        <BranchForm
          submitForm={branchRequest => this.createBranch(branchRequest)}
          loading={loading}
          repository={repository}
          branches={branches}
          transmittedName={this.transmittedName(location.search)}
          disabled={!createBranchesLink}
        />
      </>
    );
  }
}

const mapDispatchToProps = dispatch => {
  return {
    fetchBranches: (repository: Repository) => {
      dispatch(fetchBranches(repository));
    },
    createBranch: (
      createLink: string,
      repository: Repository,
      branchRequest: BranchRequest,
      callback?: (newBranch: Branch) => void,
    ) => {
      dispatch(createBranch(createLink, repository, branchRequest, callback));
    },
    resetForm: (repository: Repository) => {
      dispatch(createBranchReset(repository));
    },
  };
};

const mapStateToProps = (state, ownProps) => {
  const { repository } = ownProps;
  const loading =
    isFetchBranchesPending(state, repository) ||
    isCreateBranchPending(state, repository);
  const error =
    getFetchBranchesFailure(state, repository) || getCreateBranchFailure(state);
  const branches = getBranches(state, repository);
  const createBranchesLink = getBranchCreateLink(state, repository);
  return {
    repository,
    loading,
    error,
    branches,
    createBranchesLink,
  };
};

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