/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 arq.cmdline;

import org.apache.jena.iri.IRI ;
import org.apache.jena.riot.Lang ;
import org.apache.jena.riot.RDFLanguages ;
import org.apache.jena.riot.RiotException ;
import org.apache.jena.riot.system.IRIResolver ;
import arq.cmd.CmdException ;

import com.hp.hpl.jena.rdf.model.Model ;
import com.hp.hpl.jena.util.FileManager ;

public class ModLangParse implements ArgModuleGeneral
{
    private ArgDecl argCheck    = new ArgDecl(ArgDecl.NoValue, "check") ;
    private ArgDecl argNoCheck  = new ArgDecl(ArgDecl.NoValue, "nocheck", "noCheck") ;
    private ArgDecl argSink     = new ArgDecl(ArgDecl.NoValue, "sink", "null") ;

    private ArgDecl argStrict   = new ArgDecl(ArgDecl.NoValue, "strict") ;
    private ArgDecl argValidate = new ArgDecl(ArgDecl.NoValue, "validate") ;
    
    private ArgDecl argSkip     = new ArgDecl(ArgDecl.NoValue, "skip") ;
    private ArgDecl argNoSkip   = new ArgDecl(ArgDecl.NoValue, "noSkip") ;
    private ArgDecl argStop     = new ArgDecl(ArgDecl.NoValue, "stopOnError", "stoponerror", "stop") ;
    
    private ArgDecl argBase     = new ArgDecl(ArgDecl.HasValue, "base") ;
    
    private ArgDecl argRDFS     = new ArgDecl(ArgDecl.HasValue, "rdfs") ;
    
    private ArgDecl argSyntax     = new ArgDecl(ArgDecl.HasValue, "syntax") ;

    private  String rdfsVocabFilename   = null ;
    private  Model  rdfsVocab           = null ;
    private  String baseIRI             = null ;
    private boolean explicitCheck       = false ;
    private boolean explicitNoCheck     = false ;
    private boolean skipOnBadTerm       = false ;
    private boolean stopOnBadTerm       = false ;
    private boolean bitbucket           = false ; 
    private boolean strict              = false ;
    private boolean validate            = false ;
    private Lang lang                   = null ;
    
    @Override
    public void registerWith(CmdGeneral cmdLine) {
        cmdLine.getUsage().startCategory("Parser control") ;
        cmdLine.add(argSink,    "--sink",           "Parse but throw away output") ;
        cmdLine.add(argSyntax,  "--syntax=NAME",    "Set syntax (otherwise syntax guessed from file extension)") ;
        cmdLine.add(argBase,    "--base=URI",       "Set the base URI (does not apply to N-triples and N-Quads)") ;
        cmdLine.add(argCheck,   "--check",          "Addition checking of RDF terms") ; // (default: off for N-triples, N-Quads, on for Turtle and TriG)") ;
        cmdLine.add(argStrict,  "--strict",         "Run with in strict mode") ;
        cmdLine.add(argValidate,"--validate",       "Same as --sink --check --strict") ;
        cmdLine.add(argRDFS,    "--rdfs=file",      "Apply some RDFS inference using the vocabulary in the file") ;
        
        cmdLine.add(argNoCheck, "--nocheck",        "Turn off checking of RDF terms") ;
//        cmdLine.add(argSkip,    "--noSkip",         "Skip (do not output) triples failing the RDF term tests") ;
//        cmdLine.add(argNoSkip,  "--skip",           "Include triples failing the RDF term tests (not recommended)") ;
        cmdLine.add(argStop,    "--stop",           "Stop parsing on encountering a bad RDF term") ;
    }

    @Override
    public void processArgs(CmdArgModule cmdLine) {
        if ( cmdLine.contains(argValidate) ) {
            validate = true ;
            strict = true ;
            explicitCheck = true ;
            bitbucket = true ;
        }

        if ( cmdLine.contains(argSyntax) ) {
            String syntax = cmdLine.getValue(argSyntax) ;
            Lang lang$ = RDFLanguages.nameToLang(syntax) ;
            if ( lang$ == null )
                throw new CmdException("Can not detemine the synatx from '" + syntax + "'") ;
            this.lang = lang$ ;
        }

        if ( cmdLine.contains(argCheck) )
            explicitCheck = true ;

        if ( cmdLine.contains(argNoCheck) )
            explicitNoCheck = true ;

        if ( cmdLine.contains(argStrict) )
            strict = true ;

        if ( cmdLine.contains(argSkip) )
            skipOnBadTerm = true ;
        if ( cmdLine.contains(argNoSkip) )
            skipOnBadTerm = false ;

        if ( cmdLine.contains(argBase) ) {
            baseIRI = cmdLine.getValue(argBase) ;
            IRI iri = IRIResolver.resolveIRI(baseIRI) ;
            if ( iri.hasViolation(false) )
                throw new CmdException("Bad base IRI: " + baseIRI) ;
            if ( !iri.isAbsolute() )
                throw new CmdException("Base IRI must be an absolute IRI: " + baseIRI) ;
        }

        if ( cmdLine.contains(argStop) )
            stopOnBadTerm = true ;

        if ( cmdLine.contains(argSink) )
            bitbucket = true ;

        if ( cmdLine.contains(argRDFS) ) {
            try {
                rdfsVocabFilename = cmdLine.getArg(argRDFS).getValue() ;
                rdfsVocab = FileManager.get().loadModel(rdfsVocabFilename) ;
            } catch (RiotException ex) {
                throw new CmdException("Error in RDFS vocabulary: " + rdfsVocabFilename) ;
            } catch (Exception ex) {
                throw new CmdException("Error: " + ex.getMessage()) ;
            }
        }
    }

    public boolean explicitChecking() {
        return explicitCheck ;
    }

    public boolean explicitNoChecking() {
        return explicitNoCheck ;
    }

    public boolean strictMode() {
        return strict ;
    }

    public boolean validate() {
        return validate ;
    }

    public boolean skipOnBadTerm() {
        return skipOnBadTerm ;
    }

    public boolean stopOnBadTerm() {
        return stopOnBadTerm ;
    }

    public boolean toBitBucket() {
        return bitbucket ;
    }

    public String getBaseIRI() {
        return baseIRI ;
    }

    public Model getRDFSVocab() {
        return rdfsVocab ;
    }

    public Lang getLang() {
        return lang ;
    }
}