/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import org.apache.tools.ant.filters.ReplaceTokens;
import org.gradle.plugins.ide.eclipse.model.SourceFolder
import org.gradle.plugins.ide.eclipse.model.ClasspathEntry

def resources = scriptResources(buildscript)

configure(rootProject) {
  if (gradle.startParameter.taskNames.contains("eclipse")) {
    project.pluginManager.apply("java-base")
    project.pluginManager.apply("eclipse")

    def eclipseJavaVersion = propertyOrDefault("eclipse.javaVersion", deps.versions.minJava.get())
    def relativize = { other -> rootProject.rootDir.relativePath(other).toString() }

    eclipse {
      project {
        name = "Apache Lucene ${version}"
      }

      classpath {
        defaultOutputDir = file('build/eclipse')

        file {
          beforeMerged { classpath -> classpath.entries.removeAll { it.kind == "src" } }

          whenMerged { classpath ->
            def projects = allprojects.findAll { prj ->
              return prj.plugins.hasPlugin(JavaPlugin)
            }

            Set<String> sourceSetNames = ['main', 'test', "main${eclipseJavaVersion}" as String, "test${eclipseJavaVersion}" as String, 'tools'] as Set
            Set<String> sources = []
            Set<File> jars = []
            projects.each { prj ->
              prj.sourceSets.each { sourceSet ->
                if (sourceSetNames.contains(sourceSet.name)) {
                  sources += sourceSet.java.srcDirs.findAll { dir -> dir.exists() }.collect { dir -> relativize(dir) }
                  sources += sourceSet.resources.srcDirs.findAll { dir -> dir.exists() }.collect { dir -> relativize(dir) }
                }
              }

              // This is hacky - we take the resolved compile classpath and just
              // include JAR files from there. We should probably make it smarter
              // by looking at real dependencies. But then: this Eclipse configuration
              // doesn't really separate sources anyway so why bother.
              jars += prj.configurations.compileClasspath.resolve()
              jars += prj.configurations.testCompileClasspath.resolve()
            }

            classpath.entries += sources.sort().collect { name ->
              def sourceFolder = new SourceFolder(name, "build/eclipse/" + name)
            sourceFolder.setExcludes(["module-info.java"])
            return sourceFolder
          }
          classpath.entries += jars.unique().findAll { location -> location.isFile() && !(location.name ==~ /lucene-.*\.jar/) }.collect { location ->
            new LibEntry(location.toString())
          }
        }
      }
    }

    jdt {
      sourceCompatibility = eclipseJavaVersion
      targetCompatibility = eclipseJavaVersion
      javaRuntimeName = "JavaSE-$eclipseJavaVersion"
    }
  }

    task luceneEclipseJdt(type: Sync) {
      def errorMode = project.propertyOrDefault('eclipse.errors' ,'warning');
        def ecjLintFile = rootProject.file('gradle/validation/ecj-lint/ecj.javadocs.prefs');

        description = 'Generates the Eclipse JDT settings file.'

        inputs.file(ecjLintFile)
        inputs.property('errorMode', errorMode)
        inputs.property('eclipseJavaVersion', eclipseJavaVersion as String)

        from rootProject.file("${resources}/dot.settings")
        into rootProject.file(".settings")
        filter(ReplaceTokens, tokens: [
                'ecj-lint-config': ecjLintFile.getText('UTF-8').replaceAll(/=error\b/, '=' + errorMode)
        ])
        filteringCharset = 'UTF-8'

        doLast {
          logger.lifecycle('Eclipse config for Java {} written with ECJ errors configured as {}. Change by passing -Peclipse.errors=ignore/warning/error.', eclipseJavaVersion, errorMode)
          logger.lifecycle('To edit classes of MR-JARs for a specific Java version, use e.g., -Peclipse.javaVersion=19')
        }
      }

    eclipseJdt {
        enabled = false
        dependsOn 'luceneEclipseJdt'
    }

    eclipseClasspath {
      inputs.property('eclipseJavaVersion', eclipseJavaVersion as String
      )
    }
  }
}

public class LibEntry implements ClasspathEntry {
  private String path;

  LibEntry(String path) {
    this.path = path;
  }

  @Override
  String getKind() {
    return "lib"
  }

  @Override
  void appendNode(Node node) {
    node.appendNode("classpathentry", Map.of(
        "kind", "lib",
        "path", path
    ))
  }
}