package sparseviewer.model;

public class ChannelUtils {

    public static int findChannelIndex(String[] channelNames, String targetName) {
        if (channelNames == null || targetName == null) {
            return -1;
        }

        for (int i = 0; i < channelNames.length; i++) {
            if (targetName.equals(channelNames[i])) {
                return i;
            }
        }

        return -1;
    }

    public static int resolveChannelIndex(String[] channelNames,
                                          String storedName,
                                          int storedIndex,
                                          int defaultIndex) {
        int byName = findChannelIndex(channelNames, storedName);

        if (byName >= 0) {
            return byName;
        }

        if (storedIndex >= 0 && channelNames != null && storedIndex < channelNames.length) {
            return storedIndex;
        }

        if (channelNames != null && channelNames.length > 0) {
            if (defaultIndex < 0) {
                return 0;
            }

            if (defaultIndex >= channelNames.length) {
                return channelNames.length - 1;
            }

            return defaultIndex;
        }

        return -1;
    }

    public static String shortName(String name) {
        if (name == null) {
            return "";
        }

        String s = name;

        int typeIdx = s.lastIndexOf(":float");
        if (typeIdx > 0) {
            s = s.substring(0, typeIdx);
        }

        int idx = s.lastIndexOf(':');
        if (idx >= 0 && idx < s.length() - 1) {
            return s.substring(idx + 1);
        }

        return s;
    }
}