package com.espeed.ua;

public class Version implements Comparable<Version> {
	
	String version;
	String majorVersion;
	String minorVersion;
	
	/**
	 * This constructor is created for APIs that require default constructor 
	 * and should never be used directly.
	 * @deprecated Use {@link #Version(String, String, String)} 
	 */
	@Deprecated
	public Version() {
		// default constructor for APIs that require it (e.g. JSON serialization)
	}

	public Version(String version, String majorVersion, String minorVersion) {
		super();
		this.version = version;
		this.majorVersion = majorVersion;
		this.minorVersion = minorVersion;
	}

	public String getVersion() {
		return version;
	}

	public String getMajorVersion() {
		return majorVersion;
	}

	public String getMinorVersion() {
		return minorVersion;
	}

	@Override
	public String toString() {
		return version;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result
				+ ((majorVersion == null) ? 0 : majorVersion.hashCode());
		result = prime * result
				+ ((minorVersion == null) ? 0 : minorVersion.hashCode());
		result = prime * result + ((version == null) ? 0 : version.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Version other = (Version) obj;
		if (majorVersion == null) {
			if (other.majorVersion != null)
				return false;
		} else if (!majorVersion.equals(other.majorVersion))
			return false;
		if (minorVersion == null) {
			if (other.minorVersion != null)
				return false;
		} else if (!minorVersion.equals(other.minorVersion))
			return false;
		if (version == null) {
			if (other.version != null)
				return false;
		} else if (!version.equals(other.version))
			return false;
		return true;
	}

        public int compareTo(Version other) {
                if (other == null) {
	            return 1;
	        }

	        String[] versionParts = version.split("\\.");
	        String[] otherVersionParts = other.version.split("\\.");

	        for (int i = 0; i < Math.min(versionParts.length, otherVersionParts.length); i++) {
	            if (versionParts[i].length() == otherVersionParts[i].length()) {
	        	int comparisonResult = versionParts[i].compareTo(otherVersionParts[i]);
	        	if (comparisonResult == 0) {
	        	    continue;
	        	} else {
	        	    return comparisonResult;
	        	}
	            } else {
	        	return versionParts[i].length() > otherVersionParts[i].length() ? 1 : -1;
	            }
	        }

	        if (versionParts.length > otherVersionParts.length) {
	            return 1;
	        } else if (versionParts.length < otherVersionParts.length) {
	            return -1;
	        } else {
	            return 0;
	        }
        }	
}