package com.company;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Version {
    public enum result{
        UNKNOWN,
        SUPPORTED_LATEST,
        SUPPORTED_OLD,
        DEVELOPMENT,
        UNSUPPORTED_OLD,
        UNSUPPORTED_NEW
    }


    public static result check(String min, String last, String value) {

        final Pattern pattern_stable_release = Pattern.compile("^(\\d)\\.(\\d+)\\.(\\d+)$");
        final Pattern pattern_dev_release = Pattern.compile("^(\\d).(\\d+).(\\d+)(\\D)(.+)");
        Matcher m ;

        m = pattern_stable_release.matcher(value);
        if (m.find()) {

            switch (correlate(min, last, m.group())){
                case 0:
                    return result.UNSUPPORTED_OLD;
                case 1:
                    return result.SUPPORTED_OLD;
                case 2:
                    return result.SUPPORTED_LATEST;
                default:
                    return result.UNSUPPORTED_NEW;
            }

        }
        m = pattern_dev_release.matcher(value);
        if (m.find()) {

            m = Pattern.compile("^(\\d)\\.(\\d+)\\.(\\d+)").matcher(value);
            m.find();

            if (correlate(min, last, m.group())>0) {
                return result.DEVELOPMENT;
            } else {
                return result.UNSUPPORTED_OLD;
            }

        }

        return result.UNKNOWN;

    }

    //helper
    // 0 to less
    // 1 in spectrum
    // 2 at the top
    // 3 above
    private static int correlate(String min, String last, String value){
        //init
        int i_min = 0, i_last = 0, i_value = 0;

        while (value.indexOf(".")>0) {

            //prepare for checks
            if (min.indexOf(".") >= 0) i_min = Integer.valueOf(min.substring(0,min.indexOf(".")));
            if (last.indexOf(".") >= 0) i_last = Integer.valueOf(last.substring(0,last.indexOf(".")));
            if (value.indexOf(".") >= 0) i_value = Integer.valueOf(value.substring(0,value.indexOf(".")));


            if ( i_min != i_last ) {
                //check
                if (i_value < i_min) return 0;
                if (i_value > i_last) return 3;
            }

            //prepare for next checks
            if (min.indexOf(".") < 0) return 0;

            min = min.substring(min.indexOf(".")+1);
            last = last.substring(last.indexOf(".")+1);
            value = value.substring(value.indexOf(".")+1);

        }

        i_min = Integer.valueOf(min);
        i_last = Integer.valueOf(last);
        i_value = Integer.valueOf(value);

        if (i_value < i_min) return 0;
        if (i_min < i_value && i_value < i_last) return 1;
        if (i_value == i_last) return 2;
        if (i_value > i_last) return 3;


        return 0;
    }
}