/*
 * (c) Copyright 2010-2011 AgileBirds
 *
 * This file is part of OpenFlexo.
 *
 * OpenFlexo is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * OpenFlexo is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with OpenFlexo. If not, see <http://www.gnu.org/licenses/>.
 *
 */
package org.openflexo.foundation.dm;

import java.util.logging.Level;

import org.openflexo.foundation.dm.javaparser.MethodSourceCode;
import org.openflexo.foundation.wkf.FlexoProcess;
import org.openflexo.foundation.xml.FlexoDMBuilder;
import org.openflexo.toolbox.StringUtils;
import org.openflexo.toolbox.ToolBox;

/**
 * @author nid
 * 
 */
public class DMProcessBusinessDataAccessingMethod extends DMMethod {
	public static enum CodeType {
		CUSTOMCOMPONENT_CURRENTBUSINESSDATA, AUTOGENERATEDBUSINESSDATA_PARENT, AUTOGENERATEDBUSINESSDATA_CHILD
	}

	private long processId;
	private String processKey;
	private CodeType codeType;
	private boolean isSourceCodeCorrectlyInitialized = false;

	/**
	 * Constructor used during deserialization
	 */
	public DMProcessBusinessDataAccessingMethod(FlexoDMBuilder builder) {
		super(builder);
	}

	/**
	 * Constructor used for dynamic creation
	 */
	public DMProcessBusinessDataAccessingMethod(DMEntity entity, FlexoProcess process) {
		this(entity, process, null);
	}

	/**
	 * Constructor used for dynamic creation
	 */
	public DMProcessBusinessDataAccessingMethod(DMEntity entity, FlexoProcess process, CodeType codeType) {
		super(entity.getDMModel());
		this.codeType = codeType;
		entity.registerMethod(this);
		updateProcess(process);
	}

	/**
	 * @see org.openflexo.foundation.dm.DMMethod#getIsReadOnly()
	 */
	@Override
	public boolean getIsReadOnly() {
		return true;
	}

	/**
	 * @see org.openflexo.foundation.dm.DMMethod#isDeletable()
	 */
	@Override
	public boolean isDeletable() {
		return false;
	}

	/**
	 * @see org.openflexo.foundation.dm.DMMethod#getIsStaticallyDefinedInTemplate()
	 */
	@Override
	public boolean getIsStaticallyDefinedInTemplate() {
		return false;
	}

	/**
	 * @see org.openflexo.foundation.dm.DMMethod#getDefaultCoreCode()
	 */
	@Override
	String getDefaultCoreCode() {
		if (getReturnType() != null && _isRegistered) {
			isSourceCodeCorrectlyInitialized = true;

			if (codeType != null) {
				switch (codeType) {
				case CUSTOMCOMPONENT_CURRENTBUSINESSDATA:
					return "return (" + getReturnType().getSimplifiedStringRepresentation() + ")"
							+ ProcessBusinessDataRepository.getCustomComponentCurrentProcessBusinessDataGetterName() + "(\"" + processKey
							+ "\");";
				case AUTOGENERATEDBUSINESSDATA_CHILD:
					StringBuilder sb = new StringBuilder();
					sb.append("Vector<?> list = " + ProcessBusinessDataRepository.getChildrenProcessBusinessDataGetterName() + "(\""
							+ processKey + "\");");
					sb.append(StringUtils.LINE_SEPARATOR + "if(list.size() > 0)  return ("
							+ getReturnType().getSimplifiedStringRepresentation() + ") list.get(0);");
					sb.append(StringUtils.LINE_SEPARATOR + "return null;");
					return sb.toString();
				case AUTOGENERATEDBUSINESSDATA_PARENT:
					return "return (" + getReturnType().getSimplifiedStringRepresentation() + ")"
							+ ProcessBusinessDataRepository.getParentProcessBusinessDataGetterName() + "(\"" + processKey + "\");";
				}
			}
		}
		return super.getDefaultCoreCode();
	}

	/**
	 * @see org.openflexo.foundation.dm.DMMethod#getSourceCode()
	 */
	@Override
	public MethodSourceCode getSourceCode() {
		try {
			if (!isSourceCodeCorrectlyInitialized) {
				resetSourceCode();
			}
		} catch (Exception e) {
			// Should never happen
			logger.log(Level.SEVERE, "Cannot reste code for DMProcessBusinessDataAccessingMethod", e);
		}
		return super.getSourceCode();
	}

	/**
	 * @see org.openflexo.foundation.dm.DMMethod#setEntity(org.openflexo.foundation.dm.DMEntity)
	 */
	@Override
	public void setEntity(DMEntity entity) {
		boolean needUpdateCode = this.entity != entity;
		super.setEntity(entity);

		if (needUpdateCode) {
			getSourceCode().updateComputedCode();
		}
	}

	public void updateProcess(FlexoProcess process) {
		if (process.getBusinessDataType() == null) {
			delete();
		} else {
			try {
				this.processKey = process.getProcessDictionaryKey();
				this.processId = process.getFlexoID();
				setName(getAccessingBusinessDataMethodName(process));
				setReturnType(DMType.makeResolvedDMType(process.getBusinessDataType()));
			} catch (DuplicateMethodSignatureException e) {
				logger.log(Level.WARNING, "Cannot change process business data accessing method name to "
						+ getAccessingBusinessDataMethodName(process), e);
			}
		}
	}

	public long getProcessId() {
		return processId;
	}

	/**
	 * Should not be used directly, use updateProcess instead !
	 * 
	 * @param processId
	 */
	public void setProcessId(long processId) {
		this.processId = processId;
	}

	public String getProcessKey() {
		return processKey;
	}

	/**
	 * Should not be used directly, use updateProcess instead !
	 * 
	 * @param processId
	 */
	public void setProcessKey(String processKey) {
		this.processKey = processKey;
	}

	public CodeType getCodeType() {
		return codeType;
	}

	/**
	 * Should not be used directly, use the appropriate constructor instead !
	 * 
	 * @param codeType
	 */
	public void setCodeType(CodeType codeType) {
		this.codeType = codeType;
	}

	public static DMProcessBusinessDataAccessingMethod getProcessBusinessDataAccessingMethod(DMEntity entity, FlexoProcess process,
			CodeType codeType) {
		for (DMMethod method : entity.getDeclaredMethods()) {
			if (method instanceof DMProcessBusinessDataAccessingMethod
					&& ((DMProcessBusinessDataAccessingMethod) method).getProcessId() == process.getFlexoID()
					&& ((DMProcessBusinessDataAccessingMethod) method).getCodeType() == codeType) {
				return (DMProcessBusinessDataAccessingMethod) method;
			}
		}

		return null;
	}

	public static String getAccessingBusinessDataMethodName(FlexoProcess process) {
		return getAccessingBusinessDataMethodName(process.getProcessDictionaryKey());
	}

	public static String getAccessingBusinessDataMethodName(String processKey) {
		return "get" + ToolBox.getJavaClassName(processKey) + "BusinessData";
	}
}