import toString from '../lang/toString';
import replaceAccents from './replaceAccents';
import removeNonWord from './removeNonWord';
import upperCase from './upperCase';
import lowerCase from './lowerCase';
/**
 * Convert string to camelCase text.
 */
function camelCase(str) {
    str = toString(str);
    str = replaceAccents(str);
    str = removeNonWord(str).replace(/[\-_]/g, ' '); // convert all hyphens and underscores to spaces

    // handle acronyms
    // matches lowercase chars && uppercase words
    if (/[a-z]/.test(str) && /^|\s[A-Z]+\s|$/.test(str)) {
        // we convert any word that isn't all caps into lowercase
        str = str.replace(/\s(\w+)/g, function(word, m) {
            return /^[A-Z]+$/.test(m) ? word : lowerCase(word);
        });
    } else if (/\s/.test(str)) {
        // if it doesn't contain an acronym and it has spaces we should
        // convert every word to lowercase
        str = lowerCase(str);
    }

    return str
        .replace(/\s[a-z]/g, upperCase) // convert first char of each word to UPPERCASE
        .replace(/^\s*[A-Z]+/g, lowerCase) // convert first word to lowercase
        .replace(/\s+/g, ''); // remove spaces
}
export default camelCase;