package sh.sar.basedbank.util

object AccountInputParser {

    enum class InputType {
        MIB_ACCOUNT,  // 17 digits starting with 9
        BML_ACCOUNT,  // 13 digits starting with 7
        PHONE,        // 7 digits starting with 7 or 9
        NATIONAL_ID,  // A followed by 6 digits
        EMAIL,
        UNKNOWN
    }

    /**
     * Strip spaces and remove a 960/+960 country code prefix, but only when
     * the stripped result is exactly 7 digits (so "9603456" is left intact).
     */
    fun normalize(input: String): String {
        var s = input.replace(" ", "")
        val stripped = when {
            s.startsWith("+960") -> s.removePrefix("+960")
            s.startsWith("960")  -> s.removePrefix("960")
            else                 -> null
        }
        if (stripped != null && stripped.matches(Regex("^\\d{7}$"))) s = stripped
        return s
    }

    fun detect(input: String): InputType {
        val s = input.trim()
        return when {
            s.matches(Regex("^9\\d{16}$"))   -> InputType.MIB_ACCOUNT
            s.matches(Regex("^7\\d{12}$"))   -> InputType.BML_ACCOUNT
            s.matches(Regex("^[79]\\d{6}$")) -> InputType.PHONE
            s.matches(Regex("^[Aa]\\d{6}$")) -> InputType.NATIONAL_ID
            s.contains("@")                  -> InputType.EMAIL
            else                             -> InputType.UNKNOWN
        }
    }
}