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package com.netscape.jndi.ldap.schema;

import javax.naming.Name;
import javax.naming.NameNotFoundException;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;
import javax.naming.directory.BasicAttribute;
import javax.naming.directory.BasicAttributes;
import javax.naming.directory.ModificationItem;

import netscape.ldap.LDAPAttributeSchema;

public class SchemaAttribute extends SchemaElement {

    LDAPAttributeSchema m_ldapAttribute;

    // Attribute IDs that are exposed through Netscape LdapJDK
    private static String[] m_allAttrIds = {NUMERICOID, NAME, DESC, OBSOLETE,
                                            SUP, EQUALITY, ORDERING, SUBSTRING,
                                            SYNTAX, SINGLEVALUE, COLLECTIVE,
                                            NOUSERMOD, USAGE
    };

    public SchemaAttribute(LDAPAttributeSchema ldapAttribute, SchemaManager schemaManager) {
        super(schemaManager);
        m_ldapAttribute = ldapAttribute;
        m_path = ATTRDEF + "/" + m_ldapAttribute.getName();
    }

    public SchemaAttribute(Attributes attrs,  SchemaManager schemaManager) throws NamingException {
        super(schemaManager);
        m_ldapAttribute = parseDefAttributes(attrs);
        m_path = ATTRDEF + "/" + m_ldapAttribute.getName();
    }

    /**
     * Parse Definition Attributes for a LDAP attribute
     */
    static LDAPAttributeSchema parseDefAttributes(Attributes attrs) throws NamingException {
        String name=null, oid=null, desc=null, syntax=null, usage=null, sup=null;
        String equality=null, ordering=null, substring=null;
        boolean singleValued=false, collective=false, obsolete=false, noUserMod=false;

        for (NamingEnumeration<? extends Attribute> attrEnum = attrs.getAll(); attrEnum.hasMoreElements(); ) {
            Attribute attr = attrEnum.nextElement();
            String attrName = attr.getID();
            if (attrName.equals(NAME)) {
                name = getSchemaAttrValue(attr);
            }
            else if (attrName.equals(NUMERICOID)) {
                oid = getSchemaAttrValue(attr);
            }
            else if (attrName.equals(SYNTAX)) {
                syntax = getSchemaAttrValue(attr);
            }
            else if (attrName.equals(DESC)) {
                desc = getSchemaAttrValue(attr);
            }
            else if (attrName.equals(SINGLEVALUE)) {
                singleValued = parseTrueFalseValue(attr);
            }
            else if (attrName.equals(SUP)) {
                sup = getSchemaAttrValue(attr);
            }
            else if (attrName.equals(USAGE)) {
                usage = getSchemaAttrValue(attr);
            }
            else if (attrName.equals(OBSOLETE)) {
                obsolete = parseTrueFalseValue(attr);
            }
            else if (attrName.equals(COLLECTIVE)) {
                collective = parseTrueFalseValue(attr);
            }
            else if (attrName.equals(NOUSERMOD)) {
                noUserMod = parseTrueFalseValue(attr);
            }
            else if (attrName.equals(EQUALITY)) {
                equality = getSchemaAttrValue(attr);
            }
            else if (attrName.equals(ORDERING)) {
                ordering = getSchemaAttrValue(attr);
            }
            else if (attrName.equals(SUBSTRING)) {
                substring = getSchemaAttrValue(attr);
            }

            else {
                throw new NamingException("Invalid schema attribute type for attribute definition "    + attrName);
            }
        }

        LDAPAttributeSchema attrSchema = new LDAPAttributeSchema(name, oid, desc, syntax, singleValued, sup, null);

        if (obsolete) {
            attrSchema.setQualifier(OBSOLETE, "");
        }
        if (collective) {
            attrSchema.setQualifier(COLLECTIVE, "");
        }
        if (noUserMod) {
            attrSchema.setQualifier(NOUSERMOD, "");
        }
        if (equality != null) {
            attrSchema.setQualifier(EQUALITY, equality);
        }
        if (ordering != null) {
            attrSchema.setQualifier(ORDERING, ordering);
        }
        if (substring != null) {
            attrSchema.setQualifier(SUBSTRING, substring);
        }
        if (usage != null) {
            attrSchema.setQualifier(USAGE, usage);
        }

        return attrSchema;
    }


    /**
     * Exctract specified attributes from the ldapObjectClass
     */
    Attributes extractAttributeIds(String[] attrIds) throws NamingException{
        Attributes attrs = new BasicAttributes();
        String val = null, multiVal[]=null;
        for (int i = 0; i < attrIds.length; i++) {
            if (attrIds[i].equals(NUMERICOID)) {
                val = m_ldapAttribute.getID();
                if (val != null) {
                    attrs.put(new BasicAttribute(NUMERICOID, val));
                }
            }
            else if (attrIds[i].equals(NAME)) {
                val = m_ldapAttribute.getName();
                if (val != null) {
                    attrs.put(new BasicAttribute(NAME, val));
                }
            }
            else if (attrIds[i].equals(DESC)) {
                val = m_ldapAttribute.getDescription();
                if (val != null) {
                    attrs.put(new BasicAttribute(DESC, val));
                }
            }
            else if (attrIds[i].equals(SYNTAX)) {
                val = m_ldapAttribute.getSyntaxString();
                if (val != null) {
                    attrs.put(new BasicAttribute(SYNTAX, val));
                }
            }
            else if (attrIds[i].equals(SINGLEVALUE)) {
                if (m_ldapAttribute.isSingleValued()) {
                    attrs.put(new BasicAttribute(SINGLEVALUE, "true"));
                }
            }
            else if (attrIds[i].equals(SUP)) {
                val = m_ldapAttribute.getSuperior();
                if (val != null) {
                    attrs.put(new BasicAttribute(SUP, val));
                }
            }
            else if (attrIds[i].equals(USAGE)) {
                multiVal = m_ldapAttribute.getQualifier(USAGE);
                if (multiVal != null) {
                    attrs.put(new BasicAttribute(USAGE, multiVal));
                }
            }
            else if (attrIds[i].equals(OBSOLETE)) {
                if (m_ldapAttribute.getQualifier(OBSOLETE) != null) {
                    attrs.put(new BasicAttribute(OBSOLETE, "true"));
                }
            }
            else if (attrIds[i].equals(COLLECTIVE)) {
                if (m_ldapAttribute.getQualifier(COLLECTIVE) != null) {
                    attrs.put(new BasicAttribute(COLLECTIVE, "true"));
                }
            }
            else if (attrIds[i].equals(NOUSERMOD)) {
                if (m_ldapAttribute.getQualifier(NOUSERMOD) != null) {
                    attrs.put(new BasicAttribute(NOUSERMOD, "true"));
                }
            }
            else if (attrIds[i].equals(EQUALITY)) {
                multiVal = m_ldapAttribute.getQualifier(EQUALITY);
                if (multiVal != null) {
                    attrs.put(new BasicAttribute(EQUALITY, multiVal));
                }
            }
            else if (attrIds[i].equals(ORDERING)) {
                multiVal = m_ldapAttribute.getQualifier(ORDERING);
                if (multiVal != null) {
                    attrs.put(new BasicAttribute(ORDERING, multiVal));
                }
            }
            else if (attrIds[i].equals(SUBSTRING)) {
                multiVal = m_ldapAttribute.getQualifier(SUBSTRING);
                if (multiVal != null) {
                    attrs.put(new BasicAttribute(SUBSTRING, multiVal));
                }
            }
            else {
                throw new NamingException("Invalid schema attribute type for attribute definition "    + attrIds[i]);
            }
        }
        return attrs;
    }


    /**
     * DirContext Attribute Operations
     */

    public Attributes getAttributes(String name) throws NamingException {
        if (name.length() != 0) { // no subcontexts
            throw new NameNotFoundException(name); // no such object
        }
        return extractAttributeIds(m_allAttrIds);
    }

    public Attributes getAttributes(String name, String[] attrIds) throws NamingException {
        if (name.length() != 0) { // no subcontexts
            throw new NameNotFoundException(name); // no such object
        }
        return extractAttributeIds(attrIds);
    }

    public Attributes getAttributes(Name name) throws NamingException {
        return getAttributes(name.toString());
    }

    public Attributes getAttributes(Name name, String[] attrIds) throws NamingException {
        return getAttributes(name.toString(), attrIds);
    }

    public void modifyAttributes(String name, int mod_op, Attributes attrs) throws NamingException {
        if (name.length() != 0) { // no subcontexts
            throw new NameNotFoundException(name); // no such object
        }
        Attributes modAttrs = extractAttributeIds(m_allAttrIds);
        modifySchemaElementAttrs(modAttrs, mod_op, attrs);
        LDAPAttributeSchema modLdapAttribute = parseDefAttributes(modAttrs);
        m_schemaMgr.modifyAttribute(m_ldapAttribute, modLdapAttribute);
        m_ldapAttribute = modLdapAttribute;
    }

    public void modifyAttributes(String name, ModificationItem[] mods) throws NamingException {
        if (name.length() != 0) { // no subcontexts
            throw new NameNotFoundException(name); // no such object
        }
        Attributes modAttrs = extractAttributeIds(m_allAttrIds);
        modifySchemaElementAttrs(modAttrs, mods);
        LDAPAttributeSchema modLdapAttribute = parseDefAttributes(modAttrs);
        m_schemaMgr.modifyAttribute(m_ldapAttribute, modLdapAttribute);
        m_ldapAttribute = modLdapAttribute;
    }

    public void modifyAttributes(Name name, int mod_op, Attributes attrs) throws NamingException {
        modifyAttributes(name.toString(), mod_op, attrs);
    }

    public void modifyAttributes(Name name, ModificationItem[] mods) throws NamingException {
        modifyAttributes(name.toString(), mods);
    }

    /**
     * Search operations are not implemented because of complexity. Ir will require
     * to implement the full LDAP search filter sematics in the client. (The search
     * filter sematics is implemented by the Directory server).
     */

}