/**
 * 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 org.apache.cxf.tools.wsdlto.frontend.jaxws.generators;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;

import javax.xml.namespace.QName;

import org.apache.cxf.helpers.CastUtils;
import org.apache.cxf.tools.common.ToolConstants;
import org.apache.cxf.tools.common.ToolContext;
import org.apache.cxf.tools.common.ToolException;
import org.apache.cxf.tools.common.model.JavaExceptionClass;
import org.apache.cxf.tools.common.model.JavaField;
import org.apache.cxf.tools.common.model.JavaModel;
import org.apache.cxf.tools.util.ClassCollector;
import org.apache.cxf.tools.wsdlto.frontend.jaxws.processor.WSDLToJavaProcessor;
import org.apache.cxf.tools.wsdlto.frontend.jaxws.processor.internal.ProcessorUtil;

public class FaultGenerator extends AbstractJAXWSGenerator {

    private static final String FAULT_TEMPLATE = TEMPLATE_BASE + "/fault.vm";

    public FaultGenerator() {
        this.name = ToolConstants.FAULT_GENERATOR;
    }


    public boolean passthrough() {
        if (env.optionSet(ToolConstants.CFG_GEN_FAULT)
            || env.optionSet(ToolConstants.CFG_ALL)) {
            return false;
        } 
        return env.optionSet(ToolConstants.CFG_GEN_ANT)
            || env.optionSet(ToolConstants.CFG_GEN_TYPES)
            || env.optionSet(ToolConstants.CFG_GEN_CLIENT)
            || env.optionSet(ToolConstants.CFG_GEN_IMPL)
            || env.optionSet(ToolConstants.CFG_GEN_SEI)
            || env.optionSet(ToolConstants.CFG_GEN_SERVER)
            || env.optionSet(ToolConstants.CFG_GEN_SERVICE);
    }

    public void generate(ToolContext penv) throws ToolException {
        this.env = penv;
        if (passthrough()) {
            return;
        }
        Map<QName, JavaModel> map = CastUtils.cast((Map<?, ?>)penv.get(WSDLToJavaProcessor.MODEL_MAP));
        for (JavaModel javaModel : map.values()) {

            Map<String, JavaExceptionClass> exceptionClasses = javaModel
                    .getExceptionClasses();
            for (String expClassName : exceptionClasses.keySet()) {
                JavaExceptionClass expClz =
                    exceptionClasses.get(expClassName);
    
                clearAttributes();
                
                if (penv.containsKey(ToolConstants.CFG_FAULT_SERIAL_VERSION_UID)) {
                    String faultSerialVersionUID 
                        = penv.get(ToolConstants.CFG_FAULT_SERIAL_VERSION_UID).toString();
                    setAttributes("faultSerialVersionUID", faultSerialVersionUID);
                    if ("FQCN".equalsIgnoreCase(faultSerialVersionUID)) {
                        setAttributes("suid", generateHashSUID(expClz.getFullClassName()));
                    } else if ("TIMESTAMP".equalsIgnoreCase(faultSerialVersionUID)) {
                        setAttributes("suid", generateTimestampSUID());
                    } else if ("NONE".equalsIgnoreCase(faultSerialVersionUID)) {
                        //nothing
                        setAttributes("suid", "");
                    } else {
                        //do a quick Parse to make sure it looks like a Long
                        try {
                            Long.parseLong(faultSerialVersionUID);
                        } catch (NumberFormatException nfe) {
                            throw new ToolException(nfe);
                        }
                        setAttributes("suid", faultSerialVersionUID);
                    }
                } else {
                    setAttributes("suid", "");
                }
                setAttributes("expClass", expClz);
                String exceptionSuperclass;
                if (penv.containsKey(ToolConstants.CFG_EXCEPTION_SUPER)) {
                    exceptionSuperclass = penv.get(ToolConstants.CFG_EXCEPTION_SUPER).toString();
                } else {
                    exceptionSuperclass = "java.lang.Exception";
                }
                String simpleName = exceptionSuperclass.indexOf('.') == -1 ? exceptionSuperclass 
                    : exceptionSuperclass.substring(exceptionSuperclass.lastIndexOf('.') + 1);
                String exceptionSuperclassString = simpleName;
                for (JavaField jf : expClz.getFields()) {
                    String jfClassName = jf.getClassName();
                    if (jfClassName.substring(jfClassName.lastIndexOf(".") + 1)
                        .equals(simpleName)) {
                        exceptionSuperclassString = exceptionSuperclass;
                    }
                    setAttributes("paraName", ProcessorUtil.mangleNameToVariableName(jf.getName()));
                }
                ClassCollector collector = penv.get(ClassCollector.class);
                for (String pkg : collector.getTypesPackages()) {
                    if (collector.containTypesClass(pkg, simpleName)) {
                        exceptionSuperclassString = exceptionSuperclass;
                    }
                }
                if (expClz.getName().equals(exceptionSuperclassString)) {
                    exceptionSuperclassString = exceptionSuperclass;
                }
                setAttributes("exceptionSuperclass", exceptionSuperclassString);
                if (!exceptionSuperclass.startsWith("java.lang.")
                    && !exceptionSuperclassString.equals(exceptionSuperclass)) {
                    expClz.addImport(exceptionSuperclass);
                }
                setCommonAttributes();
                doWrite(FAULT_TEMPLATE, parseOutputName(expClz.getPackageName(),
                        expClz.getName()));
            }
        }
    }

    private String generateHashSUID(String className) {
        return Long.toString(className.hashCode());
    }

    private String generateTimestampSUID() {
        return new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
    }

    public void register(final ClassCollector collector, String packageName, String fileName) {
        collector.addExceptionClassName(packageName, fileName, packageName + "." + fileName);
    }
}
