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/*
 * Copyright 2010-2011 Craig S. Dickson (http://craigsdickson.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.squeakysand.jcr;

import com.squeakysand.commons.lang.StringUtils;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.jcr.NamespaceRegistry;
import javax.jcr.RepositoryException;
import javax.jcr.Session;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Name {

    private static final Logger LOG = LoggerFactory.getLogger(Name.class);

    private static final Pattern NAMESPACE_PATTERN = Pattern.compile("\\{(.*)\\}(.+)");

    private static final Pattern PREFIX_PATTERN = Pattern.compile("([^\\{\\}]*):(.+)");

    private String name;
    private String namespace;
    private String prefix;
    private String baseName;

    private boolean containsNamespace;
    private boolean containsPrefix;

    public Name(String name, NamespaceRegistry registry) {
        if (StringUtils.isNullOrEmpty(name)) {
            throw new IllegalArgumentException("name cannot be null or empty");
        }
        if (registry == null) {
            throw new IllegalArgumentException("registry cannot be null");
        }
        this.name = name;
        try {
            Matcher namespaceMatcher = NAMESPACE_PATTERN.matcher(name);
            Matcher prefixMatcher = PREFIX_PATTERN.matcher(name);
            if (namespaceMatcher.matches()) {
                containsNamespace = true;
                namespace = namespaceMatcher.group(1);
                baseName = namespaceMatcher.group(2);
                prefix = registry.getPrefix(namespace);
            } else if (prefixMatcher.matches()) {
                containsPrefix = true;
                prefix = prefixMatcher.group(1);
                baseName = prefixMatcher.group(2);
                namespace = registry.getURI(prefix);
            }
        } catch (RepositoryException e) {
            LOG.error(e.getMessage(), e);
        }
        if (LOG.isDebugEnabled()) {
            LOG.debug("{} - namespace: {}, prefix: {}, base: {}", new Object[] {name, namespace, prefix, baseName});
        }
    }

    public boolean containsNamespace() {
        return containsNamespace;
    }

    public boolean containsPrefix() {
        return containsPrefix;
    }

    public String getNamespace() {
        return namespace;
    }

    public String getPrefix() {
        return prefix;
    }

    public String getBaseName() {
        return baseName;
    }

    public String getSimpleName() {
        return String.format("%s:%s", getPrefix(), getBaseName());
    }

    public String getQualifiedName() {
        return String.format("{%s}%s", getNamespace(), getBaseName());
    }

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

}