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package csip;

import csip.api.server.COSU;
import csip.cosu.ObjFunc;
import csip.utils.JSONUtils;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.SortedSet;
import java.util.TreeSet;
import org.codehaus.jettison.json.JSONArray;
import org.codehaus.jettison.json.JSONException;
import org.codehaus.jettison.json.JSONObject;

/**
 * COSU support for services.
 *
 * @author od
 */
class COSUImpl implements COSU {

  static final String KEY_COSU = "cosu";

  Map<String, JSONObject> cosu;


  COSUImpl(JSONObject metainfo) {
    if (metainfo.has(KEY_COSU)) {
      try {
        // all cosu entries
        cosu = JSONUtils.preprocess(metainfo.get(KEY_COSU));
      } catch (JSONException ex) {
        throw new RuntimeException(ex);
      }
    }
  }


  JSONArray getCOSUMetainfo() {
    if (!isSupported())
      throw new UnsupportedOperationException();
    JSONArray arr = new JSONArray();
    SortedSet<String> keys = new TreeSet<>(cosu.keySet());
    for (String key : keys) {
      arr.put(cosu.get(key));
    }
    return arr;
  }


  @Override
  public boolean isSupported() {
    return cosu != null;
  }


  @Override
  public List<String> getNames() {
    if (!isSupported())
      throw new UnsupportedOperationException();

    return new ArrayList<>(cosu.keySet());
  }


  @Override
  public ObjFunc getObjFunc(String name) {
    if (!isSupported())
      throw new UnsupportedOperationException();

    JSONObject p = cosu.get(name);
    return ObjFunc.of(p.optString("of", null));
  }


  @Override
  public String[] getData(String name) {
    if (!isSupported())
      throw new UnsupportedOperationException();

    JSONObject p = cosu.get(name);
    try {
      return JSONUtils.toStringArray(p.getJSONArray("data"));
    } catch (JSONException ex) {
      throw new RuntimeException(ex);
    }
  }


  @Override
  public void setValue(String name, double value) {
    if (!isSupported())
      throw new UnsupportedOperationException();

    JSONObject p = cosu.get(name);
    try {
      p.put("value", value);
    } catch (JSONException ex) {
      throw new RuntimeException(ex);
    }
  }


  @Override
  public String toString() {
    return cosu == null ? "Not supported." : cosu.toString();
  }

}