import React from 'react';
import classNames from 'classnames';
import styled from 'styled-components';
import { Branch } from '@scm-manager/ui-types';
import DropDown from './forms/DropDown';

type Props = {
  branches: Branch[];
  selected: (branch?: Branch) => void;
  selectedBranch?: string;
  label: string;
  disabled?: boolean;
};

type State = {
  selectedBranch?: Branch;
};

const ZeroflexFieldLabel = styled.div`
  flex-basis: inherit;
  flex-grow: 0;
`;

const MinWidthControl = styled.div`
  min-width: 10rem;
`;

const NoBottomMarginField = styled.div`
  margin-bottom: 0 !important;
`;

export default class BranchSelector extends React.Component<Props, State> {
  constructor(props: Props) {
    super(props);
    this.state = {};
  }

  componentDidMount() {
    const { branches } = this.props;
    if (branches) {
      const selectedBranch = branches.find(
        branch => branch.name === this.props.selectedBranch,
      );
      this.setState({
        selectedBranch,
      });
    }
  }

  render() {
    const { branches, label, disabled } = this.props;

    if (branches) {
      return (
        <div className={classNames('field', 'is-horizontal')}>
          <ZeroflexFieldLabel
            className={classNames('field-label', 'is-normal')}
          >
            <label className={classNames('label', 'is-size-6')}>{label}</label>
          </ZeroflexFieldLabel>
          <div className="field-body">
            <NoBottomMarginField className={classNames('field', 'is-narrow')}>
              <MinWidthControl className="control">
                <DropDown
                  className="is-fullwidth"
                  options={branches.map(b => b.name)}
                  optionSelected={this.branchSelected}
                  disabled={!!disabled}
                  preselectedOption={
                    this.state.selectedBranch
                      ? this.state.selectedBranch.name
                      : ''
                  }
                />
              </MinWidthControl>
            </NoBottomMarginField>
          </div>
        </div>
      );
    } else {
      return null;
    }
  }

  branchSelected = (branchName: string) => {
    const { branches, selected } = this.props;

    if (!branchName) {
      this.setState({
        selectedBranch: undefined,
      });
      selected(undefined);
      return;
    }
    const branch = branches.find(b => b.name === branchName);

    selected(branch);
    this.setState({
      selectedBranch: branch,
    });
  };
}
