'use strict';

var visit = require('unist-util-visit');

var hasOwnProperty = Object.prototype.hasOwnProperty;
var hastCssPropertyMap = {
  align: 'text-align',
  valign: 'vertical-align',
  height: 'height',
  width: 'width'
};

module.exports = function tableCellStyle(node) {
  visit(node, 'element', visitor);
  return node;
};

function visitor(node) {
  if (node.tagName !== 'tr' && node.tagName !== 'td' && node.tagName !== 'th') {
    return;
  }

  var hastName;
  var cssName;
  for (hastName in hastCssPropertyMap) {
    if (
      !hasOwnProperty.call(hastCssPropertyMap, hastName) ||
      node.properties[hastName] === undefined
    ) {
      continue;
    }
    cssName = hastCssPropertyMap[hastName];
    appendStyle(node, cssName, node.properties[hastName]);
    delete node.properties[hastName];
  }
}

function appendStyle(node, property, value) {
  var prevStyle = (node.properties.style || '').trim();
  if (prevStyle && !/;\s*/.test(prevStyle)) {
    prevStyle += ';';
  }
  if (prevStyle) {
    prevStyle += ' ';
  }
  var nextStyle = prevStyle + property + ': ' + value + ';';
  node.properties.style = nextStyle;
}