import capitalize from "./capitalize.js"

/**
 * Formats a string to camel case.
 *
 * @example
 * Basic usage
 * ```js
 * // Returns journalismIsAwesome
 * const text = camelCase("Journalism is awesome")
 * ```
 *
 * @param input The string to be formatted.
 *
 * @category Formatting
 */
export default function camelCase(input: string): string {
    const words = input
        .replace(/[^a-zA-Z0-9\s]/g, " ")
        .split(/\s+/)
        .filter((d) => d !== "")

    // Convert to camelCase
    const camelCaseString = words
        .map((word, index) => {
            // Lowercase the entire string first
            word = word.toLowerCase()

            // Capitalize the first letter of each word except the first one
            if (index > 0) {
                word = capitalize(word)
            }

            return word
        })
        .join("")

    return camelCaseString
}