/*
 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
 *
 * 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.drools.eclipse.editors;

import org.drools.eclipse.DRLInfo;
import org.drools.eclipse.DRLInfo.FunctionInfo;
import org.drools.eclipse.DRLInfo.RuleInfo;
import org.drools.eclipse.DroolsEclipsePlugin;
import org.drools.eclipse.debug.core.DroolsLineBreakpoint;
import org.drools.eclipse.debug.core.IDroolsDebugConstants;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.model.IBreakpoint;
import org.eclipse.debug.ui.actions.IToggleBreakpointsTarget;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchPart;

public class DroolsLineBreakpointAdapter implements IToggleBreakpointsTarget {

    public boolean canToggleLineBreakpoints(IWorkbenchPart part, ISelection selection) {
        if (part instanceof IEditorPart && selection instanceof ITextSelection) {
            IEditorPart editor = (IEditorPart) part;
            IResource resource = (IResource) editor.getEditorInput().getAdapter(IResource.class);
            ITextSelection textSelection = (ITextSelection) selection;
            int lineNumber = textSelection.getStartLine();
            try {
                DRLInfo drlInfo = DroolsEclipsePlugin.getDefault().parseResource(resource, false);
                if (drlInfo != null) {
                    RuleInfo ruleInfo = drlInfo.getRuleInfo(lineNumber);
                    if (ruleInfo != null) {
                        if (ruleInfo.getConsequenceDrlLineNumber() <= lineNumber) {
                            return true;
                        }
                    }
                    FunctionInfo functionInfo = drlInfo.getFunctionInfo(lineNumber);
                    if (functionInfo != null) {
                        if (functionInfo.getDrlLineNumber() <= lineNumber) {
                            return true;
                        }
                    }
                }
            } catch (Throwable t) {
                DroolsEclipsePlugin.log(t);
            }
        }
        return false;
    }

    public boolean canToggleMethodBreakpoints(IWorkbenchPart part, ISelection selection) {
        return false;
    }

    public boolean canToggleWatchpoints(IWorkbenchPart part, ISelection selection) {
        return false;
    }

    public void toggleLineBreakpoints(IWorkbenchPart part, ISelection selection) throws CoreException {
        if (part instanceof IEditorPart) {
            IEditorPart editor = (IEditorPart) part;
            IResource resource = (IResource) editor.getEditorInput().getAdapter(IResource.class);
            ITextSelection textSelection = (ITextSelection) selection;
            int lineNumber = textSelection.getStartLine();
            IBreakpoint[] breakpoints = DebugPlugin.getDefault().getBreakpointManager().getBreakpoints(IDroolsDebugConstants.ID_DROOLS_DEBUG_MODEL);
            for (int i = 0; i < breakpoints.length; i++) {
                IBreakpoint breakpoint = breakpoints[i];
                if (resource.equals(breakpoint.getMarker().getResource())) {
                    if (breakpoint.getMarker().getType().equals(IDroolsDebugConstants.DROOLS_MARKER_TYPE)) {
                        if (((DroolsLineBreakpoint) breakpoint).getDRLLineNumber() == (lineNumber + 1)) {
                            breakpoint.delete();
                            return;
                        }
                    }
                }
            }
            // TODO: drools breakpoints can only be created in functions and consequences
            DroolsLineBreakpoint lineBreakpoint = new DroolsLineBreakpoint(resource, lineNumber + 1);
            DebugPlugin.getDefault().getBreakpointManager().addBreakpoint(lineBreakpoint);
        }
    }

    public void toggleMethodBreakpoints(IWorkbenchPart part, ISelection selection) throws CoreException {
        // do nothing
    }

    public void toggleWatchpoints(IWorkbenchPart part, ISelection selection) throws CoreException {
        // do nothing
    }
}
