import _ from 'lodash';
import PropTypes from 'prop-types';
import React, { Component } from 'react';
import { DndProvider } from 'react-dnd-multi-backend';
import HTML5toTouch from 'react-dnd-multi-backend/dist/esm/HTML5toTouch';
import Form from 'Components/Form/Form';
import FormGroup from 'Components/Form/FormGroup';
import FormInputGroup from 'Components/Form/FormInputGroup';
import FormInputHelpText from 'Components/Form/FormInputHelpText';
import FormLabel from 'Components/Form/FormLabel';
import Button from 'Components/Link/Button';
import Modal from 'Components/Modal/Modal';
import ModalBody from 'Components/Modal/ModalBody';
import ModalContent from 'Components/Modal/ModalContent';
import ModalFooter from 'Components/Modal/ModalFooter';
import ModalHeader from 'Components/Modal/ModalHeader';
import { inputTypes } from 'Helpers/Props';
import TableOptionsColumn from './TableOptionsColumn';
import TableOptionsColumnDragPreview from './TableOptionsColumnDragPreview';
import TableOptionsColumnDragSource from './TableOptionsColumnDragSource';
import styles from './TableOptionsModal.css';

class TableOptionsModal extends Component {

  //
  // Lifecycle

  constructor(props, context) {
    super(props, context);

    this.state = {
      hasPageSize: !!props.pageSize,
      pageSize: props.pageSize,
      pageSizeError: null,
      dragIndex: null,
      dropIndex: null
    };
  }

  componentDidUpdate(prevProps) {
    if (prevProps.pageSize !== this.state.pageSize) {
      this.setState({ pageSize: this.props.pageSize });
    }
  }

  //
  // Listeners

  onPageSizeChange = ({ value }) => {
    let pageSizeError = null;

    if (value < 5) {
      pageSizeError = 'Page size must be at least 5';
    } else if (value > 250) {
      pageSizeError = 'Page size must not exceed 250';
    } else {
      this.props.onTableOptionChange({ pageSize: value });
    }

    this.setState({
      pageSize: value,
      pageSizeError
    });
  }

  onVisibleChange = ({ name, value }) => {
    const columns = _.cloneDeep(this.props.columns);

    const column = _.find(columns, { name });
    column.isVisible = value;

    this.props.onTableOptionChange({ columns });
  }

  onColumnDragMove = (dragIndex, dropIndex) => {
    if (this.state.dragIndex !== dragIndex || this.state.dropIndex !== dropIndex) {
      this.setState({
        dragIndex,
        dropIndex
      });
    }
  }

  onColumnDragEnd = ({ id }, didDrop) => {
    const {
      dragIndex,
      dropIndex
    } = this.state;

    if (didDrop && dropIndex !== null) {
      const columns = _.cloneDeep(this.props.columns);
      const items = columns.splice(dragIndex, 1);
      columns.splice(dropIndex, 0, items[0]);

      this.props.onTableOptionChange({ columns });
    }

    this.setState({
      dragIndex: null,
      dropIndex: null
    });
  }

  //
  // Render

  render() {
    const {
      isOpen,
      columns,
      canModifyColumns,
      optionsComponent: OptionsComponent,
      onTableOptionChange,
      onModalClose
    } = this.props;

    const {
      hasPageSize,
      pageSize,
      pageSizeError,
      dragIndex,
      dropIndex
    } = this.state;

    const isDragging = dropIndex !== null;
    const isDraggingUp = isDragging && dropIndex < dragIndex;
    const isDraggingDown = isDragging && dropIndex > dragIndex;

    return (
      <DndProvider options={HTML5toTouch}>
        <Modal
          isOpen={isOpen}
          onModalClose={onModalClose}
        >
          {
            isOpen ?
              <ModalContent onModalClose={onModalClose}>
                <ModalHeader>
                  Table Options
                </ModalHeader>

                <ModalBody>
                  <Form>
                    {
                      hasPageSize ?
                        <FormGroup>
                          <FormLabel>Page Size</FormLabel>

                          <FormInputGroup
                            type={inputTypes.NUMBER}
                            name="pageSize"
                            value={pageSize || 0}
                            helpText="Number of items to show on each page"
                            errors={pageSizeError ? [{ message: pageSizeError }] : undefined}
                            onChange={this.onPageSizeChange}
                          />
                        </FormGroup> :
                        null
                    }

                    {
                      OptionsComponent ?
                        <OptionsComponent
                          onTableOptionChange={onTableOptionChange}
                        /> : null
                    }

                    {
                      canModifyColumns ?
                        <FormGroup>
                          <FormLabel>Columns</FormLabel>

                          <div>
                            <FormInputHelpText
                              text="Choose which columns are visible and which order they appear in"
                            />

                            <div className={styles.columns}>
                              {
                                columns.map((column, index) => {
                                  const {
                                    name,
                                    label,
                                    columnLabel,
                                    isVisible,
                                    isModifiable
                                  } = column;

                                  if (isModifiable !== false) {
                                    return (
                                      <TableOptionsColumnDragSource
                                        key={name}
                                        name={name}
                                        label={label || columnLabel}
                                        isVisible={isVisible}
                                        isModifiable={true}
                                        index={index}
                                        isDragging={isDragging}
                                        isDraggingUp={isDraggingUp}
                                        isDraggingDown={isDraggingDown}
                                        onVisibleChange={this.onVisibleChange}
                                        onColumnDragMove={this.onColumnDragMove}
                                        onColumnDragEnd={this.onColumnDragEnd}
                                      />
                                    );
                                  }

                                  return (
                                    <TableOptionsColumn
                                      key={name}
                                      name={name}
                                      label={label || columnLabel}
                                      isVisible={isVisible}
                                      index={index}
                                      isModifiable={false}
                                      onVisibleChange={this.onVisibleChange}
                                    />
                                  );
                                })
                              }

                              <TableOptionsColumnDragPreview />
                            </div>
                          </div>
                        </FormGroup> :
                        null
                    }
                  </Form>
                </ModalBody>
                <ModalFooter>
                  <Button
                    onPress={onModalClose}
                  >
                    Close
                  </Button>
                </ModalFooter>
              </ModalContent> :
              null
          }
        </Modal>
      </DndProvider>
    );
  }
}

TableOptionsModal.propTypes = {
  isOpen: PropTypes.bool.isRequired,
  columns: PropTypes.arrayOf(PropTypes.object).isRequired,
  pageSize: PropTypes.number,
  canModifyColumns: PropTypes.bool.isRequired,
  optionsComponent: PropTypes.elementType,
  onTableOptionChange: PropTypes.func.isRequired,
  onModalClose: PropTypes.func.isRequired
};

TableOptionsModal.defaultProps = {
  canModifyColumns: true
};

export default TableOptionsModal;