import deburrLetter from './internal/deburrLetter';

import toString from './toString';

/** Used to match latin-1 supplementary letters (excluding mathematical operators). */

var reLatin1 = /[\xc0-\xd6\xd8-\xde\xdf-\xf6\xf8-\xff]/g;

/** Used to compose unicode character classes. */

var rsComboRange = '\\u0300-\\u036f\\ufe20-\\ufe23';

/** Used to compose unicode capture groups. */

var rsCombo = '[' + rsComboRange + ']';

/** Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks). */

var reComboMark = RegExp(rsCombo, 'g');

/**

* Deburrs `string` by converting [latin-1 supplementary letters](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)

* to basic latin letters and removing [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).

*

* @static

* @memberOf _

* @category String

* @param {string} [string=''] The string to deburr.

* @returns {string} Returns the deburred string.

* @example

*

* _.deburr('déjà vu');

* // => 'deja vu'

*/

function deburr(string) {

string = toString(string);

return string && string.replace(reLatin1, deburrLetter).replace(reComboMark, '');

}

export default deburr;