/*
 * RiskScape™ Copyright New Zealand Institute for Earth Science Limited
 * (Earth Sciences New Zealand) is distributed for research purposes only
 * under the terms of AGPLv3.
 *
 * RiskScape™ Copyright 2026 New Zealand Institute for Earth Science
 * Limited (Earth Sciences New Zealand). All rights reserved. Source code
 * available under the AGPLv3.
 * 
 * This program is free software: you can redistribute it and/or modify it under
 *  the terms of the GNU Affero General Public License as published by the Free
 *  Software Foundation, either version 3 of the License, or (at your option) any
 *  later version.
 * 
 * This program is distributed for RESEARCH PURPOSES ONLY, in the hope that it will
 * be useful for research and education initiatives.
 * 
 * If you are not a researcher, or you are a researcher who wishes to use this
 * program on terms other than AGPLv3 (including those who wish to restrict the
 * distribution of any source code created using this program), please contact:
 * https://riskscape.org.nz
 * 
 * This program is distributed WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Affero General Public License for more details.  You should have received a copy
 * of the GNU Affero General Public License along with this program.  If not, see
 * <http://www.gnu.org/licenses/>.
 * 
 * By way of summary only, under the AGPLv3:
 *     • Permissions of this strongest copyleft license are conditioned
 *       on making available complete source code of licensed works and
 *       modifications, which include larger works using a licensed work,
 *       under the same license.
 *     • Copyright and license notices must be preserved.
 *     • Contributors provide an express grant of patent rights.
 *     • When a modified version is used to provide a service over a
 *       network, the complete source code of the modified version must be made
 *       available.
 */
package nz.org.riskscape.engine.pipeline;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;

import com.codahale.metrics.MetricRegistry;

import lombok.Getter;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import nz.org.riskscape.engine.DefaultRealizationContext;
import nz.org.riskscape.engine.Engine;
import nz.org.riskscape.engine.Project;
import nz.org.riskscape.engine.bind.BindingContext;
import nz.org.riskscape.engine.bind.DefaultBindingContext;
import nz.org.riskscape.engine.bind.ResolvedBookmarkBinder;
import nz.org.riskscape.engine.bind.SelfDescribingScalarDataBinder;
import nz.org.riskscape.engine.rl.ExpressionRealizer;
import nz.org.riskscape.engine.rl.RealizationContext;
import nz.org.riskscape.engine.util.FileUtils;
import nz.org.riskscape.problem.ProblemSink;

@Slf4j @RequiredArgsConstructor
public class DefaultExecutionContext implements ExecutionContext {

  @Getter
  private final Project project;

  @Getter
  private final ProblemSink problemSink;

  @Getter
  private final PipelineExecutor pipelineExecutor;

  @Getter
  private final Engine engine;

  @Getter
  private final Path tempDirectory;

  @Getter
  private final MetricRegistry metricRegistry = new MetricRegistry();

  @Getter
  private final BindingContext bindingContext;

  @Getter
  private final ExpressionRealizer expressionRealizer;

  @Getter
  private final RealizationContext realizationContext;

  public DefaultExecutionContext(Project project, ProblemSink problemSink) {
    this.pipelineExecutor = project.getEngine().getPipelineExecutor();
    this.project = project;
    this.problemSink = problemSink;
    this.engine = project.getEngine();
    try {
      this.tempDirectory = Files.createTempDirectory(engine.getTempDirectory(), "execution-context-");
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
    this.bindingContext = new DefaultBindingContext(project, problemSink);

    // allow binding to bookmark data via this execution context
    this.bindingContext.addBinder(new ResolvedBookmarkBinder(this));
    this.bindingContext.addBinder(new SelfDescribingScalarDataBinder());

    this.realizationContext = new DefaultRealizationContext(project, metricRegistry, bindingContext, problemSink);
    this.expressionRealizer = realizationContext.getExpressionRealizer();
  }

  @Override
  public void close() {
    try {
      if (Files.exists(tempDirectory)) {
        FileUtils.removeDirectory(tempDirectory);
      }
    } catch (IOException e) {
      log.warn("could not delete execution context temp directory", e);
    }
  }

  @Override
  public PipelineRealizer getPipelineRealizer() {
    return new DefaultPipelineRealizer();
  }
}
