/*******************************************************************************
 * Copyright (c) 2003, 2004, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 * IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jst.j2ee.internal.servertarget;

import java.util.Collections;
import java.util.List;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jst.j2ee.internal.J2EEVersionConstants;
import org.eclipse.jst.j2ee.internal.plugin.J2EEPlugin;
import org.eclipse.jst.j2ee.internal.project.J2EECreationResourceHandler;
import org.eclipse.wst.common.frameworks.internal.operations.WTPOperation;
import org.eclipse.wst.common.frameworks.internal.operations.WTPOperationDataModel;
import org.eclipse.wst.common.frameworks.internal.operations.WTPPropertyDescriptor;
import org.eclipse.wst.server.core.IRuntime;
import org.eclipse.wst.server.core.internal.ResourceManager;

public class J2EEProjectServerTargetDataModel extends WTPOperationDataModel {

    public J2EEProjectServerTargetDataModel() {
        super();
    }

    private static final String DEFAULT_TARGET_ID = "org.eclipse.jst.server.core.runtimeType"; //$NON-NLS-1$

    /**
     * required, type String
     */
    public static final String PROJECT_NAME = "J2EEProjectServerTargetDataModel.PROJECT_NAME"; //$NON-NLS-1$

    /**
     * required, not defaulted. If null, will not run.
     */
    public static final String RUNTIME_TARGET_ID = "J2EEProjectServerTargetDataModel.RUNTIME_TARGET_ID"; //$NON-NLS-1$

    /**
     * optional, default true, type Boolean. Set this to true if the operation
     * is supposed to update all dependent modules and projects in an ear if the
     * passed project name is an ear project
     */
    public static final String UPDATE_MODULES = "J2EEProjectServerTargetDataModel.UPDATE_MODULES"; //$NON-NLS-1$

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.wst.common.frameworks.internal.operation.WTPOperationDataModel#getDefaultOperation()
     */
    public WTPOperation getDefaultOperation() {
        return new J2EEProjectServerTargetOperation(this);
    }

    protected void initValidBaseProperties() {
        super.initValidBaseProperties();
        addValidBaseProperty(PROJECT_NAME);
        addValidBaseProperty(RUNTIME_TARGET_ID);
        addValidBaseProperty(UPDATE_MODULES);
    }

    public IProject getProject() {
        String name = (String) getProperty(PROJECT_NAME);
        if (name != null && name.length() > 0)
            return ResourcesPlugin.getWorkspace().getRoot().getProject(name);
        return null;
    }

    public IRuntime getRuntimeTarget() {
        String serverTargetId = (String) getProperty(RUNTIME_TARGET_ID);
        return ResourceManager.getInstance().getRuntime(serverTargetId);
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.wst.common.frameworks.internal.operation.WTPOperationDataModel#getDefaultProperty(java.lang.String)
     */
    protected Object getDefaultProperty(String propertyName) {
        if (propertyName.equals(RUNTIME_TARGET_ID))
            return getDefaultServerTargetID();
        else if (propertyName.equals(UPDATE_MODULES)) {
            return Boolean.TRUE;
        }
        return super.getDefaultProperty(propertyName);
    }

    private Integer getDefaultVersionID() {
        return new Integer(J2EEVersionConstants.J2EE_1_4_ID);
    }

    /**
     * @return
     */
    private Object getDefaultServerTargetID() {
        List targets = getValidServerTargets();
        if (!targets.isEmpty()) {
            IRuntime target = null;
            for (int i = targets.size() - 1; i < targets.size() && i >= 0; i--) {
                target = (IRuntime) targets.get(i);
                if (DEFAULT_TARGET_ID.equals(target.getId()))
                    return target.getId();
            }
            if (target != null)
                return target.getId();
        }
        return null;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.wst.common.frameworks.internal.operation.WTPOperationDataModel#doGetValidPropertyValues(java.lang.String)
     */
    protected WTPPropertyDescriptor[] doGetValidPropertyDescriptors(String propertyName) {
        if (propertyName.equals(RUNTIME_TARGET_ID))
            return getValidServerTargetDescriptors();
        return super.doGetValidPropertyDescriptors(propertyName);
    }

    private WTPPropertyDescriptor[] getValidServerTargetDescriptors() {
        List targets = getValidServerTargets();
        WTPPropertyDescriptor[] descriptors = null;
        if (!targets.isEmpty()) {
            int serverTargetListSize = targets.size();
            descriptors = new WTPPropertyDescriptor[serverTargetListSize];
            for (int i = 0; i < targets.size(); i++) {
                IRuntime runtime = (IRuntime) targets.get(i);
                descriptors[i] = new WTPPropertyDescriptor(runtime.getId(), runtime.getName());
            }
        } else {
            descriptors = new WTPPropertyDescriptor[0];
        }
        return descriptors;
    }

    private IRuntime getServerTargetByID(String id) {
        List targets = getValidServerTargets();
        IRuntime target;
        for (int i = 0; i < targets.size(); i++) {
            target = (IRuntime) targets.get(i);
            if (id.equals(target.getId()))
                return target;
        }
        return null;
    }

    /**
     * @return
     */
    private List getValidServerTargets() {
        List validServerTargets = null;
        //TODO: api is needed from the server target helper to get all server targets
		//validServerTargets = ServerTargetHelper.getServerTargets(IServerTargetConstants.EAR_TYPE, IServerTargetConstants.J2EE_14);
        validServerTargets = ServerTargetHelper.getServerTargets("", "");  //$NON-NLS-1$  //$NON-NLS-2$
        if (validServerTargets != null && validServerTargets.isEmpty())
            validServerTargets = null;
        if (validServerTargets == null)
            return Collections.EMPTY_LIST;
        return validServerTargets;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.wst.common.frameworks.internal.operation.WTPOperationDataModel#doValidateProperty(java.lang.String)
     */
    protected IStatus doValidateProperty(String propertyName) {
        if (propertyName.equals(RUNTIME_TARGET_ID))
            return validateServerTarget();
        return super.doValidateProperty(propertyName);
    }

    /**
     * @return
     */
    private IStatus validateServerTarget() {
        List targets = getValidServerTargets();
        if (targets.isEmpty()) {
            return J2EEPlugin.newErrorStatus(J2EECreationResourceHandler.getString("ServerTargetDataModel_UI_7"), null); //$NON-NLS-1$
        }
        IRuntime target = getRuntimeTarget();
        if (target == null) {
            return J2EEPlugin.newErrorStatus(J2EECreationResourceHandler.getString("ServerTargetDataModel_UI_8"), null); //$NON-NLS-1$
        } else if (!targets.contains(target)) {
            return J2EEPlugin.newErrorStatus(J2EECreationResourceHandler.getString("ServerTargetDataModel_UI_9"), null); //$NON-NLS-1$
        }
        return OK_STATUS;
    }

}