/*******************************************************************************
 * Copyright (c) 2010 Ericsson 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:
 *     Ericsson - Initial API and implementation
 *******************************************************************************/
package org.eclipse.cdt.dsf.mi.service.command.output;

import java.util.ArrayList;
import java.util.List;

/**
 * -trace-list-variables
 * 
 * ^done,trace-variables={nr_rows="1",nr_cols="3",
 *                        hdr=[{width="15",alignment="-1",col_name="name",colhdr="Name"},
 *                             {width="11",alignment="-1",col_name="initial",colhdr="Initial"},
 *                             {width="11",alignment="-1",col_name="current",colhdr="Current"}],
 *                        body=[variable={name="$trace_timestamp",initial="0"}
 *                              variable={name="$foo",initial="10",current="15"}]}
 *                          
 * @since 3.0
 */
public class MITraceListVariablesInfo extends MIInfo {

	public class MITraceVariableInfo {
		private String fName;
		private String fInitialValue;
		private String fCurrentValue;
		
		public String getName() {
			return fName;
		}

		public String getCurrentValue() {
			return fCurrentValue;
		}

		public String getInitialValue() {
			return fInitialValue;
		}
	}

	private MITraceVariableInfo[] fVariables;
	
	public MITraceListVariablesInfo(MIOutput out) {
		super(out);
		parse();
	}

	public MITraceVariableInfo[] getTraceVariables() {
		return fVariables;
	}

	private void parse() {
	       List<MITraceVariableInfo> aList = new ArrayList<MITraceVariableInfo>(1);
	        if (isDone()) {
	            MIOutput out = getMIOutput();
	            MIResultRecord rr = out.getMIResultRecord();
	            if (rr != null) {
	                MIResult[] results =  rr.getMIResults();
	                for (int i = 0; i < results.length; i++) {
	                    String var = results[i].getVariable();
	                    if (var.equals("trace-variables")) { //$NON-NLS-1$
	                        parseTable(results[i].getMIValue(), aList);
	                    }
	                }
	            }
	        }
	        fVariables = aList.toArray(new MITraceVariableInfo[aList.size()]);
	}
	
    private void parseTable(MIValue val, List<MITraceVariableInfo> aList) {
        if (val instanceof MITuple) {
            MIResult[] table = ((MITuple)val).getMIResults();
            for (int i = 0; i < table.length; i++) {
                String variable = table[i].getVariable();
                if (variable.equals("body")) { //$NON-NLS-1$
                    parseBody(table[i].getMIValue(), aList);
                }
            }
        }
    }
    
    private void parseBody(MIValue body, List<MITraceVariableInfo> aList) {
        if (body instanceof MIList) {
            MIResult[] vars = ((MIList)body).getMIResults();
            for (int i = 0; i < vars.length; i++) {
                String variable = vars[i].getVariable();
                if (variable.equals("variable")) { //$NON-NLS-1$
                	parseVariable(vars[i].getMIValue(), aList);
                }
            }
        }
    }
    
    private void parseVariable(MIValue variable, List<MITraceVariableInfo> aList) {
        if (variable instanceof MITuple) {
        	MIResult[] results = ((MITuple)variable).getMIResults();
        	MITraceVariableInfo info = new MITraceVariableInfo();
        	for (int i = 0; i < results.length; i++) {
        		String var = results[i].getVariable();
        		MIValue value = results[i].getMIValue();
        		String str = ""; //$NON-NLS-1$
        		if (value != null && value instanceof MIConst) {
        			str = ((MIConst)value).getCString();
        		}

        		if (var.equals("name")) { //$NON-NLS-1$
        			info.fName = str;
        		} else if (var.equals("initial")) { //$NON-NLS-1$
        			info.fInitialValue = str;
        		} else if (var.equals("current")) { //$NON-NLS-1$    			
        			info.fCurrentValue = str;
        		}
        	}
        	aList.add(info);
        }
    }
}