"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.removeFormat = removeFormat;
var _normaliseFormats = require("./normalise-formats");
/**
 * Internal dependencies
 */

/** @typedef {import('./types').RichTextValue} RichTextValue */

/**
 * Remove any format object from a Rich Text value by type from the given
 * `startIndex` to the given `endIndex`. Indices are retrieved from the
 * selection if none are provided.
 *
 * @param {RichTextValue} value        Value to modify.
 * @param {string}        formatType   Format type to remove.
 * @param {number}        [startIndex] Start index.
 * @param {number}        [endIndex]   End index.
 *
 * @return {RichTextValue} A new value with the format applied.
 */
function removeFormat(value, formatType, startIndex = value.start, endIndex = value.end) {
  const {
    formats,
    activeFormats
  } = value;
  const newFormats = formats.slice();

  // If the selection is collapsed, expand start and end to the edges of the
  // format.
  if (startIndex === endIndex) {
    const format = newFormats[startIndex]?.find(({
      type
    }) => type === formatType);
    if (format) {
      while (newFormats[startIndex]?.find(newFormat => newFormat === format)) {
        filterFormats(newFormats, startIndex, formatType);
        startIndex--;
      }
      endIndex++;
      while (newFormats[endIndex]?.find(newFormat => newFormat === format)) {
        filterFormats(newFormats, endIndex, formatType);
        endIndex++;
      }
    }
  } else {
    for (let i = startIndex; i < endIndex; i++) {
      if (newFormats[i]) {
        filterFormats(newFormats, i, formatType);
      }
    }
  }
  return (0, _normaliseFormats.normaliseFormats)({
    ...value,
    formats: newFormats,
    activeFormats: activeFormats?.filter(({
      type
    }) => type !== formatType) || []
  });
}
function filterFormats(formats, index, formatType) {
  const newFormats = formats[index].filter(({
    type
  }) => type !== formatType);
  if (newFormats.length) {
    formats[index] = newFormats;
  } else {
    delete formats[index];
  }
}
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