/*******************************************************************************
 * Copyright (c) 2000, 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package net.sourceforge.phpdt.internal.corext.codemanipulation;

import net.sourceforge.phpdt.core.Flags;
import net.sourceforge.phpdt.core.IField;
import net.sourceforge.phpdt.core.IJavaProject;
import net.sourceforge.phpdt.core.IMethod;
import net.sourceforge.phpdt.core.IType;
import net.sourceforge.phpdt.core.JavaModelException;
import net.sourceforge.phpdt.core.NamingConventions;
import net.sourceforge.phpdt.core.Signature;
import net.sourceforge.phpdt.internal.corext.util.JavaModelUtil;
import net.sourceforge.phpdt.internal.corext.util.JdtFlags;
import net.sourceforge.phpdt.ui.CodeGeneration;
import net.sourceforge.phpdt.ui.PreferenceConstants;

import org.eclipse.core.runtime.CoreException;

public class GetterSetterUtil {

	private static final String[] EMPTY = new String[0];

	// no instances
	private GetterSetterUtil() {
	}

	public static String getGetterName(IField field, String[] excludedNames)
			throws JavaModelException {
		boolean useIs = PreferenceConstants.getPreferenceStore().getBoolean(
				PreferenceConstants.CODEGEN_IS_FOR_GETTERS);
		return getGetterName(field, excludedNames, useIs);
	}

	private static String getGetterName(IField field, String[] excludedNames,
			boolean useIsForBoolGetters) throws JavaModelException {
		if (excludedNames == null) {
			excludedNames = EMPTY;
		}
		return getGetterName(field.getJavaProject(), field.getElementName(),
				field.getFlags(), useIsForBoolGetters
						&& JavaModelUtil.isBoolean(field), excludedNames);
	}

	public static String getGetterName(IJavaProject project, String fieldName,
			int flags, boolean isBoolean, String[] excludedNames) {
		return NamingConventions.suggestGetterName(project, fieldName, flags,
				isBoolean, excludedNames);
	}

	public static String getSetterName(IJavaProject project, String fieldName,
			int flags, boolean isBoolean, String[] excludedNames) {
		return NamingConventions.suggestSetterName(project, fieldName, flags,
				isBoolean, excludedNames);
	}

	public static String getSetterName(IField field, String[] excludedNames)
			throws JavaModelException {
		if (excludedNames == null) {
			excludedNames = EMPTY;
		}
		return NamingConventions.suggestSetterName(field.getJavaProject(),
				field.getElementName(), field.getFlags(), JavaModelUtil
						.isBoolean(field), excludedNames);
	}

	public static IMethod getGetter(IField field) throws JavaModelException {
		IMethod primaryCandidate = JavaModelUtil.findMethod(getGetterName(
				field, EMPTY, true), new String[0], false, field
				.getDeclaringType());
		if (!JavaModelUtil.isBoolean(field)
				|| (primaryCandidate != null && primaryCandidate.exists()))
			return primaryCandidate;
		// bug 30906 describes why we need to look for other alternatives here
		String secondCandidateName = getGetterName(field, EMPTY, false);
		return JavaModelUtil.findMethod(secondCandidateName, new String[0],
				false, field.getDeclaringType());
	}

	public static IMethod getSetter(IField field) throws JavaModelException {
		String[] args = new String[] { field.getTypeSignature() };
		return JavaModelUtil.findMethod(getSetterName(field, EMPTY), args,
				false, field.getDeclaringType());
	}

	/**
	 * Create a stub for a getter of the given field using getter/setter
	 * templates. The resulting code has to be formatted and indented.
	 * 
	 * @param field
	 *            The field to create a getter for
	 * @param setterName
	 *            The chosen name for the setter
	 * @param addComments
	 *            If <code>true</code>, comments will be added.
	 * @param flags
	 *            The flags signaling visibility, if static, synchronized or
	 *            final
	 * @return Returns the generated stub.
	 * @throws CoreException
	 */
	public static String getSetterStub(IField field, String setterName,
			boolean addComments, int flags) throws CoreException {

		String fieldName = field.getElementName();
		IType parentType = field.getDeclaringType();

		String returnSig = field.getTypeSignature();
		String typeName = Signature.toString(returnSig);

		IJavaProject project = field.getJavaProject();

		String accessorName = NamingConventions
				.removePrefixAndSuffixForFieldName(project, fieldName, field
						.getFlags());
		String argname = StubUtility.suggestArgumentName(project, accessorName,
				EMPTY);

		boolean isStatic = Flags.isStatic(flags);
		// boolean isSync= Flags.isSynchronized(flags);
		boolean isFinal = Flags.isFinal(flags);

		// create the setter stub
		StringBuffer buf = new StringBuffer();
		if (addComments) {
			String comment = CodeGeneration.getSetterComment(field
					.getCompilationUnit(),
					parentType.getTypeQualifiedName('.'), setterName, field
							.getElementName(), typeName, argname, accessorName,
					String.valueOf('\n'));
			if (comment != null) {
				buf.append(comment);
				buf.append('\n');
			}
		}
		buf.append(JdtFlags.getVisibilityString(flags));
		buf.append(' ');
		if (isStatic)
			buf.append("static "); //$NON-NLS-1$
			// if (isSync)
			// buf.append("synchronized "); //$NON-NLS-1$
		if (isFinal)
			buf.append("final "); //$NON-NLS-1$				

		buf.append("void "); //$NON-NLS-1$
		buf.append(setterName);
		buf.append('(');
		buf.append(typeName);
		buf.append(' ');
		buf.append(argname);
		buf.append(") {\n"); //$NON-NLS-1$

		boolean useThis = PreferenceConstants.getPreferenceStore().getBoolean(
				PreferenceConstants.CODEGEN_KEYWORD_THIS);
		if (argname.equals(fieldName) || (useThis && !isStatic)) {
			if (isStatic)
				fieldName = parentType.getElementName() + '.' + fieldName;
			else
				fieldName = "this." + fieldName; //$NON-NLS-1$
		}
		String body = CodeGeneration.getSetterMethodBodyContent(field
				.getCompilationUnit(), parentType.getTypeQualifiedName('.'),
				setterName, fieldName, argname, String.valueOf('\n'));
		if (body != null) {
			buf.append(body);
		}
		buf.append("}\n"); //$NON-NLS-1$		
		return buf.toString();
	}

	/**
	 * Create a stub for a getter of the given field using getter/setter
	 * templates. The resulting code has to be formatted and indented.
	 * 
	 * @param field
	 *            The field to create a getter for
	 * @param getterName
	 *            The chosen name for the getter
	 * @param addComments
	 *            If <code>true</code>, comments will be added.
	 * @param flags
	 *            The flags signaling visibility, if static, synchronized or
	 *            final
	 * @return Returns the generated stub.
	 * @throws CoreException
	 */
	public static String getGetterStub(IField field, String getterName,
			boolean addComments, int flags) throws CoreException {
		String fieldName = field.getElementName();
		IType parentType = field.getDeclaringType();

		boolean isStatic = Flags.isStatic(flags);
		// boolean isSync= Flags.isSynchronized(flags);
		boolean isFinal = Flags.isFinal(flags);

		String typeName = Signature.toString(field.getTypeSignature());
		String accessorName = NamingConventions
				.removePrefixAndSuffixForFieldName(field.getJavaProject(),
						fieldName, field.getFlags());

		// create the getter stub
		StringBuffer buf = new StringBuffer();
		if (addComments) {
			String comment = CodeGeneration.getGetterComment(field
					.getCompilationUnit(),
					parentType.getTypeQualifiedName('.'), getterName, field
							.getElementName(), typeName, accessorName, String
							.valueOf('\n'));
			if (comment != null) {
				buf.append(comment);
				buf.append('\n');
			}
		}

		buf.append(JdtFlags.getVisibilityString(flags));
		buf.append(' ');
		if (isStatic)
			buf.append("static "); //$NON-NLS-1$
			// if (isSync)
			// buf.append("synchronized "); //$NON-NLS-1$
		if (isFinal)
			buf.append("final "); //$NON-NLS-1$

		buf.append(typeName);
		buf.append(' ');
		buf.append(getterName);
		buf.append("() {\n"); //$NON-NLS-1$

		boolean useThis = PreferenceConstants.getPreferenceStore().getBoolean(
				PreferenceConstants.CODEGEN_KEYWORD_THIS);
		if (useThis && !isStatic) {
			fieldName = "this." + fieldName; //$NON-NLS-1$
		}

		String body = CodeGeneration.getGetterMethodBodyContent(field
				.getCompilationUnit(), parentType.getTypeQualifiedName('.'),
				getterName, fieldName, String.valueOf('\n'));
		if (body != null) {
			buf.append(body);
		}
		buf.append("}\n"); //$NON-NLS-1$
		return buf.toString();
	}

}