package de.neitzel.fxdesigner.maven;

import java.nio.file.*;
import java.util.*;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugins.annotations.*;
import org.apache.maven.project.MavenProject;

/** Runs after package in Maven's process; no application class is loaded into a designer host. */
@Mojo(name = "capture", requiresDependencyResolution = ResolutionScope.TEST, threadSafe = true)
public final class CaptureMojo extends AbstractMojo {
  @Parameter(defaultValue = "${project}", readonly = true, required = true)
  private MavenProject project;

  @Parameter(defaultValue = "${session}", readonly = true, required = true)
  private MavenSession session;

  @Parameter(property = "designer.captureDir", required = true)
  private java.io.File directory;

  public void execute() throws MojoExecutionException {
    try {
      var proof = new Properties();
      try (var in =
          Files.newInputStream(
              directory.toPath().resolve(DependencyProof.id(project) + ".dependencies"))) {
        proof.load(in);
      }
      DependencyProof.verify(proof);
      var p = new Properties();
      p.putAll(proof);
      p.setProperty("format", "2");
      p.setProperty("module", project.getBasedir().getCanonicalPath());
      p.setProperty(
          "coordinates",
          project.getGroupId() + ":" + project.getArtifactId() + ":" + project.getVersion());
      p.setProperty("packaging", project.getPackaging());
      list(p, "runtime", project.getRuntimeClasspathElements());
      list(p, "test", project.getTestClasspathElements());
      var roots = new ArrayList<String>(project.getCompileSourceRoots());
      roots.addAll(project.getTestCompileSourceRoots());
      project.getResources().forEach(r -> roots.add(r.getDirectory()));
      project.getTestResources().forEach(r -> roots.add(r.getDirectory()));
      list(p, "sources", roots);
      var dependencies = new ArrayList<String>();
      for (var a : project.getArtifacts())
        for (var other : session.getProjects())
          if (a.getGroupId().equals(other.getGroupId())
              && a.getArtifactId().equals(other.getArtifactId())
              && a.getVersion().equals(other.getVersion()))
            dependencies.add(other.getBasedir().getCanonicalPath());
      list(p, "dependencies", dependencies);
      list(p, "profiles", session.getRequest().getActiveProfiles());
      Files.createDirectories(directory.toPath());
      String id =
          HexFormat.of()
              .formatHex(
                  java.security.MessageDigest.getInstance("SHA-256")
                      .digest(
                          project
                              .getBasedir()
                              .getCanonicalPath()
                              .getBytes(java.nio.charset.StandardCharsets.UTF_8)));
      try (var out = Files.newOutputStream(directory.toPath().resolve(id + ".properties"))) {
        p.store(out, "Neitzel FX Designer effective Maven capture");
      }
    } catch (Exception e) {
      throw new MojoExecutionException("Cannot capture effective Maven metadata", e);
    }
  }

  private static void list(Properties p, String name, List<String> values) {
    p.setProperty(name + ".count", Integer.toString(values.size()));
    for (int i = 0; i < values.size(); i++) p.setProperty(name + "." + i, values.get(i));
  }
}