/*
    * Copyright 2004-2006 the Seasar Foundation and the Others.
    *
    * 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 org.seasar.tuigwaa.view.wiki;
  
  import java.text.SimpleDateFormat;
  
  import org.seasar.tuigwaa.model.common.EntityUtils;
  import org.seasar.tuigwaa.model.common.TgwElementVisitor;
  import org.seasar.tuigwaa.model.core.TgwAttribute;
  import org.seasar.tuigwaa.model.core.TgwDomain;
  import org.seasar.tuigwaa.model.core.TgwEntity;
  import org.seasar.tuigwaa.model.core.impl.BooleanAttribute;
  import org.seasar.tuigwaa.model.core.impl.DateAttribute;
  import org.seasar.tuigwaa.model.core.impl.DoubleAttribute;
  import org.seasar.tuigwaa.model.core.impl.FileAttribute;
  import org.seasar.tuigwaa.model.core.impl.FkAttribute;
  import org.seasar.tuigwaa.model.core.impl.FloatAttribute;
  import org.seasar.tuigwaa.model.core.impl.IntegerAttribute;
  import org.seasar.tuigwaa.model.core.impl.LongAttribute;
  import org.seasar.tuigwaa.model.core.impl.SecurityAttribute;
  import org.seasar.tuigwaa.model.core.impl.SelfAttribute;
  import org.seasar.tuigwaa.model.core.impl.SetAttribute;
  import org.seasar.tuigwaa.model.core.impl.StringAttribute;
  import org.seasar.tuigwaa.model.core.impl.TimestampAttribute;
  import org.seasar.tuigwaa.util.TgwResource;
  import org.seasar.tuigwaa.util.functor.ArrayViewerFunction;
  import org.seasar.tuigwaa.util.functor.BinaryUnaryFunction;
  import org.seasar.tuigwaa.util.functor.DateFilterFunction;
  import org.seasar.tuigwaa.util.functor.FileDownloadFunction;
  import org.seasar.tuigwaa.util.functor.Op;
  import org.seasar.tuigwaa.util.functor.PropertyFunction;
  import org.seasar.tuigwaa.util.functor.ReplaceStringFunction;
  import org.seasar.tuigwaa.util.functor.StringBooleanFunction;
  import org.seasar.tuigwaa.util.functor.SubstringFunction;
  import org.seasar.tuigwaa.util.functor.TextEscapeFunction;
  
  import com.isenshi.util.functor.BinaryFunction;
  import com.isenshi.util.functor.CompositeBinaryFunction;
  import com.isenshi.util.functor.CompositeUnaryFunction;
  import com.isenshi.util.functor.UnaryFunction;
  
  public class DefaultDataViewVisitor implements TgwElementVisitor {
  
  	public static final DefaultDataViewVisitor INSTANCE = new DefaultDataViewVisitor();
  
  	protected static final String EMAIL_TEMPLATE = "<a href='mailto:${0}'>${0}</a>";
  
  	protected static final String URL_TEMPLATE = "<a href='${0}'>${0}</a>";
  
  	private UnaryFunction substringFunction = new SubstringFunction(10);
  
  	private UnaryFunction escapeFunction = new TextEscapeFunction();
  
  	protected DefaultDataViewVisitor() {
  	}
  
  	public Object visit(DoubleAttribute field, Object data) {
  		return null;
  	}
  
  	public Object visit(LongAttribute field, Object data) {
  		return null;
  	}
  
  	public Object visit(SelfAttribute field, Object data) {
  		return (BinaryFunction) field.getEntity().accept(this, data);
  	}
  
  	public Object visit(IntegerAttribute field, Object data) {
  		return null;
  	}
  
  	public Object visit(FloatAttribute field, Object data) {
  		return null;
  	}
  
  	public Object visit(BooleanAttribute field, Object data) {
  		String trueStr = field.getTrueStr();
  		String falseStr = field.getFalseStr();
  		if (trueStr == null || falseStr == null) {
  			return null;
  		}
  		return toBinary(new StringBooleanFunction(trueStr, falseStr));
  	}
  
  	public Object visit(StringAttribute field, Object data) {
 		String mask = field.getMask();
 		if (StringAttribute.MASK_EMAIL.equals(mask)) {
 			return toBinary(new ReplaceStringFunction(EMAIL_TEMPLATE));
 		} else if (StringAttribute.MASK_URL.equals(mask)) {
 			return toBinary(new ReplaceStringFunction(URL_TEMPLATE));
 		} else if (StringAttribute.MASK_CONTEXT.equals(mask)
 				|| StringAttribute.MASK_WIKI.equals(mask)
 				|| StringAttribute.MASK_SHORTCONTEXT.equals(mask)) {
 			return toBinary(escape(substringFunction));
 		} else if (StringAttribute.MASK_NORMAL.equals(mask)) {
 			return toBinary(escapeFunction);
 		}
 		return null;
 	}
 
 	public Object visit(DateAttribute field, Object data) {
 		String dateformat = TgwResource.getProperty("option.display.date");
 		SimpleDateFormat format = new SimpleDateFormat(dateformat);
 		return toBinary(new DateFilterFunction(format));
 	}
 
 	public Object visit(FileAttribute field, Object data) {
 		String tableName = field.getEntity().getName();
 		String fieldName = field.getName();
 		return new FileDownloadFunction(true, tableName, fieldName);
 	}
 
 	public Object visit(SecurityAttribute field, Object data) {
 		return null;
 	}
 
 	public Object visit(TimestampAttribute field, Object data) {
 		String dateformat = TgwResource.getProperty("option.display.timestamp");
 		SimpleDateFormat format = new SimpleDateFormat(dateformat);
 		return toBinary(new DateFilterFunction(format));
 	}
 
 	public Object visit(SetAttribute field, Object data) {
 		if (EntityUtils.manyToManyFlag(field)) {
 			TgwAttribute theOtherAttr = EntityUtils.getTheOtherAttribute(field);
 			BinaryFunction function = new CompositeBinaryFunction(
 					(BinaryFunction) theOtherAttr.accept(this, data),
 					new BinaryUnaryFunction(new PropertyFunction(theOtherAttr
 							.getName())));
 			return toBinary(new ArrayViewerFunction(function));
 		} else {
 			return toBinary(Op.COLLECTIONSIZE_FUNCTION);
 		}
 	}
 
 	public Object visit(FkAttribute field, Object data) {
 		// String attrName = field.getName();
 		TgwEntity refEntity = field.getRefEntity();
 		return (BinaryFunction) refEntity.accept(this, data);
 		// BinaryFunction propFunction = new BinaryUnaryFunction(new
 		// PropertyFunction(attrName));
 		// BinaryFunction binaryFunction =
 		// return new CompositeBinaryFunction(binaryFunction, propFunction);
 		// String nestedField = field.getRefEntity()
 		// .getRecursiveRepresentativeField();
 		// return new BinaryUnaryFunction(new PropertyFunction(nestedField));
 	}
 
 	public Object visit(TgwEntity entity, Object data) {
 		String fieldName = entity.getRepresentativeField();
 		TgwAttribute field = entity.getField(fieldName);
 		BinaryFunction propertyFunction = new BinaryUnaryFunction(
 				new PropertyFunction(fieldName));
 		BinaryFunction fieldViewFunction = (BinaryFunction) field.accept(this,
 				data);
 		if (fieldViewFunction == null) {
 			fieldViewFunction = Op.NOTHING_BINARY_FUNCTION;
 		}
 		return new CompositeBinaryFunction(fieldViewFunction, propertyFunction);
 	}
 
 	public Object visit(TgwDomain domain, Object data) {
 		return null;
 	}
 
 	protected Object toBinary(UnaryFunction unary) {
 		return new BinaryUnaryFunction(unary);
 	}
 
 	protected UnaryFunction escape(UnaryFunction unary) {
 		return new CompositeUnaryFunction(unary, escapeFunction);
 	}
 }