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package cdc.perfs.snapshot;

import cdc.perfs.Context;
import cdc.perfs.Measure;
import cdc.perfs.MeasureStatus;
import cdc.perfs.api.MeasureLevel;
import cdc.perfs.api.Source;
import cdc.perfs.core.AbstractContext;

/**
 * Implementation of Context for snapshots.
 *
 * @author Damien Carbonne
 *
 */
public final class SnapshotContext extends AbstractContext {
    private long absoluteEnd;

    /**  Height of this context. */
    private int height = 0;

    private final boolean alive;

    SnapshotContext(SnapshotEnvironment environment,
                    int id,
                    String name,
                    boolean alive) {
        super(environment, id, name);
        this.alive = alive;
    }

    SnapshotContext(SnapshotEnvironment environment,
                    Context context) {
        super(environment, context.getId(), context.getName());
        this.alive = context.isAlive();

        // Clone measures
        SnapshotMeasure previous = null;
        for (int index = 0; index < context.getRootMeasuresCount(); index++) {
            previous = clone(context.getRootMeasure(index), null, 0, previous);
        }
    }

    private SnapshotMeasure clone(Measure measure,
                                  SnapshotMeasure parent,
                                  int parentDepth,
                                  SnapshotMeasure previous) {
        final SnapshotMeasure clone = new SnapshotMeasure(measure, parent, previous, this);
        height = Math.max(height, parentDepth + 1);

        Measure child = measure.getFirstChild();
        SnapshotMeasure prev = null;
        while (child != null) {
            prev = clone(child, clone, parentDepth + 1, prev);
            child = child.getNextSibling();
        }
        return clone;
    }

    public SnapshotMeasure createMeasure(SnapshotMeasure parent,
                                         int parentDepth,
                                         SnapshotMeasure previous,
                                         Source source,
                                         String details,
                                         long begin,
                                         long end,
                                         MeasureStatus status,
                                         MeasureLevel level) {
        final SnapshotMeasure measure =
                new SnapshotMeasure(parent, previous, source, details, begin, end, status, level, this);
        height = Math.max(height, parentDepth + 1);

        return measure;

    }

    @Override
    public SnapshotEnvironment getEnvironment() {
        return (SnapshotEnvironment) super.getEnvironment();
    }

    @Override
    public Thread getThread() {
        return null;
    }

    @Override
    public boolean isAlive() {
        return alive;
    }

    public void setAbsoluteEndNano(long end) {
        absoluteEnd = end;
    }

    public long getAbsoluteEndNano() {
        return absoluteEnd;
    }

    @Override
    public int getHeight() {
        return height;
    }
}