class KotlinDataClassFormatter<T> : Formatter<T> {

    override fun call(value: T): String {
        return prettyPrint(value.toString())
    }

    private fun prettyPrint(string: String): String {
        val builder = StringBuilder()
        var indent = 0
        var inString = false
        for (char in string) {
            if (!inString && char in LITERAL_STRING_TOKENS) {
                inString = true
            }
            else if (inString && char in LITERAL_STRING_TOKENS) {
                inString = false
            }
            if (!inString && char in INDENT_START_TOKENS) {
                indent++
            }
            if (!inString && char in LINE_BREAK_TOKENS) {
                builder.append('\n')
            }
            if (!inString && char in INDENT_END_TOKENS) {
                indent--
            }
            builder.append("\t".repeat(indent))
            builder.append(char)
        }
        return builder.toString()
    }

    companion object {
        val INDENT_START_TOKENS = charArrayOf('(', '{', ',')
        val INDENT_END_TOKENS = charArrayOf(')', '}')
        val LINE_BREAK_TOKENS = charArrayOf('(')
        val LITERAL_STRING_TOKENS = charArrayOf('"', '\'')
    }

}