/*
Copyright (c) 2008  Franklin Schmidt <fschmidt@gmail.com>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

package fschmidt.util.mail;

import java.util.regex.Pattern;

public class MailAddress {

    public static final Pattern EMAIL_PATTERN =
            Pattern.compile("\\b(\\w[-+~.\\w]*)@[-\\w]+(\\.[-\\w]+)*\\.[a-zA-Z]+\\b");

    private final String addrSpec;
    private final String displayName;

    public MailAddress(String addrSpec) {
        this(addrSpec,null);
    }

    public MailAddress(String addrSpec,String displayName) {
        this.addrSpec = addrSpec;
        this.displayName = displayName;
    }

    public String getAddrSpec() {
        return addrSpec;
    }

    public String getDisplayName() {
        return displayName;
    }

    public String toString() {
        return displayName==null ? addrSpec : displayName+" <"+addrSpec+">";
    }

    public boolean equals(Object o) {
        if( !(o instanceof MailAddress) )
            return false;
        MailAddress ma = (MailAddress)o;
        return addrSpec.equals(ma.addrSpec);
    }

    public int hashCode() {
        return addrSpec.hashCode();
    }

    public boolean isValid() {
        return EMAIL_PATTERN.matcher(addrSpec).matches() && addrSpec.indexOf("..") == -1;
    }

    // Test Code ----------------------------------------------------------------------------------

    public static void main(String[] args) {
        String[] valid = {
			"none@none.net",
			"none-owner@none.net",
			"none+owner@none.net",
			"none-the-owner@none.net.us",
			"none.owner@none.net.us",
			"fwd+lists~2B1264539414801-166331~40in.nabble.com+pharo-project-request~40lists.gforge.inria.fr+-679136591@in.nabble.com"
		};

        String[] invalid = {
//			"none-@none.net",  // not sure
			"none...@none.net",
			"none@none.net-",
			"...none@none.net.us...",
			".-.@---",
			"none@none+plus.com",
			"none @none.net",
			"none@ none.net",
			"abc.example.com",
//			"abc.@example.com",  // not sure
			"abc..123@example.com",
			"a@b@c@example.com",
			"()[]\\;:,<>@example.com"
		};

        System.out.println("--- Valid (Only TRUE)");
        printEmailValidation(valid);

        System.out.println("--- Invalid (Only FALSE)");
        printEmailValidation(invalid);
    }

    private static void printEmailValidation(String[] valid) {
        for (String s : valid) {
            MailAddress mailAddress = new MailAddress(s);
            System.out.println(s + " (" + mailAddress.isValid() + ')');
        }
    }
}