package com.intellij.execution.runners;

import com.intellij.execution.ExecutionManager;
import com.intellij.execution.ExecutorRegistry;
import com.intellij.execution.process.ProcessHandler;
import com.intellij.execution.ui.RunContentDescriptor;
import com.intellij.openapi.Disposable;
import com.intellij.openapi.actionSystem.*;
import com.intellij.openapi.project.DumbAwareAction;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Disposer;
import com.intellij.util.containers.ContainerUtil;
import org.jetbrains.annotations.NotNull;

import java.util.List;

/**
 * Reruns all registered execution sessions.<p>
 * The difference between this action and {@code Rerun} action (Ctrl+F5) is that this action reruns
 * only explicitly registered execution sessions. For example, their tabs can be hidden by other tabs, it doesn't matter.
 * <p>
 * Thus it can be convenient for rerunning tests, because running non-test execution session after
 * running test execution session won't hide the latter.
 *
 * @author Sergey Simonchik
 */
public class RerunTestsAction extends DumbAwareAction implements AnAction.TransparentUpdate {

  public static final String ID = "RerunTests";
  private static final List<RerunInfo> REGISTRY = ContainerUtil.createLockFreeCopyOnWriteList();

  public static void register(@NotNull RunContentDescriptor descriptor,
                              @NotNull ExecutionEnvironment env,
                              @NotNull ProgramRunner runner) {
    final RerunInfo rerunInfo = new RerunInfo(descriptor, env, runner);
    REGISTRY.add(rerunInfo);
    Disposer.register(descriptor, new Disposable() {
      @Override
      public void dispose() {
        REGISTRY.remove(rerunInfo);
      }
    });
  }

  @Override
  public void actionPerformed(AnActionEvent e) {
    DataContext dataContext = e.getDataContext();
    Project project = CommonDataKeys.PROJECT.getData(dataContext);
    if (project == null) {
      return;
    }
    ExecutionManager executionManager = ExecutionManager.getInstance(project);
    for (RerunInfo rerunInfo : REGISTRY) {
      RunContentDescriptor descriptor = rerunInfo.getDescriptor();
      if (!Disposer.isDisposed(descriptor)) {
        ExecutionEnvironment env = rerunInfo.getEnv();
        ProgramRunner runner = rerunInfo.getRunner();
        ProcessHandler processHandler = descriptor.getProcessHandler();
        if (processHandler != null && processHandler.isProcessTerminated()) {
          if (!ExecutorRegistry.getInstance().isStarting(project, env.getExecutor().getId(), runner.getRunnerId())) {
            executionManager.restartRunProfile(runner, env, descriptor);
          }
        }
      }
    }
  }

  @Override
  public void update(AnActionEvent e) {
    Presentation presentation = e.getPresentation();
    presentation.setEnabled(true);
  }

  private static class RerunInfo {

    private final RunContentDescriptor myDescriptor;
    private final ExecutionEnvironment myEnv;
    private final ProgramRunner myRunner;

    public RerunInfo(@NotNull RunContentDescriptor descriptor,
                     @NotNull ExecutionEnvironment env,
                     @NotNull ProgramRunner runner) {
      myDescriptor = descriptor;
      myEnv = env;
      myRunner = runner;
    }

    private RunContentDescriptor getDescriptor() {
      return myDescriptor;
    }

    private ExecutionEnvironment getEnv() {
      return myEnv;
    }

    private ProgramRunner getRunner() {
      return myRunner;
    }
  }

}