const d3 = require('d3');
const $ = require('jquery');
/*
    Utility function that takes a d3 svg:text selection and a max width, and splits the
    text's text across multiple tspan lines such that any given line does not exceed max width

    If text does not span multiple lines AND adjustedY is passed,
    will set the text to the passed val
 */
export function wrapSvgText(text, width, adjustedY) {
  const lineHeight = 1;
  // ems
  text.each(function () {
    const d3Text = d3.select(this);
    const words = d3Text.text().split(/\s+/);
    let word;
    let line = [];
    let lineNumber = 0;
    const x = d3Text.attr('x');
    const y = d3Text.attr('y');
    const dy = parseFloat(d3Text.attr('dy'));
    let tspan =
      d3Text.text(null).append('tspan').attr('x', x)
            .attr('y', y)
            .attr('dy', dy + 'em');

    let didWrap = false;
    for (let i = 0; i < words.length; i++) {
      word = words[i];
      line.push(word);
      tspan.text(line.join(' '));
      if (tspan.node().getComputedTextLength() > width) {
        line.pop();
        // remove word that pushes over the limit
        tspan.text(line.join(' '));
        line = [word];
        tspan =
          d3Text.append('tspan').attr('x', x).attr('y', y)
                .attr('dy', ++lineNumber * lineHeight + dy + 'em')
                .text(word);
        didWrap = true;
      }
    }
    if (!didWrap && typeof adjustedY !== 'undefined') {
      tspan.attr('y', adjustedY);
    }
  });
}
/**
 * Sets the body and title content of a modal, and shows it. Assumes HTML for modal exists and that
 * it handles closing (i.e., works with bootstrap)
 *
 * @param {object} options object of the form
 *  {
 *    title: {string},
 *    body: {string},
 *    modalSelector: {string, default: '.misc-modal' },
 *    titleSelector: {string, default: '.misc-modal .modal-title' },
 *    bodySelector:  {string, default: '.misc-modal .modal-body' },
 *   }
 */
function showModal(options) {
  /* eslint no-param-reassign: 0 */
  options.modalSelector = options.modalSelector || '.misc-modal';
  options.titleSelector = options.titleSelector || '.misc-modal .modal-title';
  options.bodySelector = options.bodySelector || '.misc-modal .modal-body';
  $(options.titleSelector).html(options.title || '');
  $(options.bodySelector).html(options.body || '');
  $(options.modalSelector).modal('show');
}
const showApiMessage = function (resp) {
  const template =
    '<div class="alert"> ' +
    '<button type="button" class="close" ' +
    'data-dismiss="alert">\xD7</button> </div>';
  const severity = resp.severity || 'info';
  $(template).addClass('alert-' + severity)
             .append(resp.message)
             .appendTo($('#alert-container'));
};
const toggleCheckbox = function (apiUrlPrefix, selector) {
  const apiUrl = apiUrlPrefix + $(selector)[0].checked;
  $.get(apiUrl).fail(function (xhr) {
    const resp = xhr.responseJSON;
    if (resp && resp.message) {
      showApiMessage(resp);
    }
  });
};
/**
 * Fix the height of the table body of a DataTable with scrollY set
 */
const fixDataTableBodyHeight = function ($tableDom, height) {
  const headHeight = $tableDom.find('.dataTables_scrollHead').height();
  $tableDom.find('.dataTables_scrollBody').css('max-height', height - headHeight);
};
const formatters = {};
function d3format(format, number) {
  // Formats a number and memoizes formatters to be reused
  format = format || '.3s';
  if (!(format in formatters)) {
    formatters[format] = d3.format(format);
  }
  return formatters[format](number);
}
module.exports = {
  d3format,
  fixDataTableBodyHeight,
  showModal,
  toggleCheckbox,
  wrapSvgText,
};