/*
 * 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.
 */

/*
 * Master Gradle initialization script
 *
 * Depends on bnd_* values from gradle.properties.
 */

import aQute.bnd.build.Workspace
import aQute.bnd.osgi.Constants

/* Add bnd gradle plugin as a script dependency */
buildscript {
  repositories {
    jcenter()
  }
  dependencies {
    classpath bnd_plugin
  }
  /* Pass bnd gradle plugin classpath to rootProject once created */
  def bndPlugin = files(configurations.classpath.files)
  gradle.rootProject { rootProject ->
    rootProject.ext.bndPlugin = bndPlugin
  }
}

/* Initialize the bnd workspace */
Workspace.setDriver(Constants.BNDDRIVER_GRADLE)
Workspace.addGestalt(Constants.GESTALT_BATCH, null)
def workspace = new Workspace(rootDir, bnd_cnf)
if (workspace == null) {
  throw new GradleException("Unable to load workspace ${rootDir}/${bnd_cnf}")
}

/* Add cnf project to the graph */
include bnd_cnf

/* Start with the declared build project name */
def defaultProjectName = bnd_build

/* If in a subproject, use the subproject name */
for (def currentDir = startParameter.currentDir; currentDir != rootDir; currentDir = currentDir.parentFile) {
  defaultProjectName = currentDir.name
}

/* Build a set of project names we need to include from the specified tasks */
def projectNames = startParameter.taskNames.collect { taskName ->
  def elements = taskName.split(':')
  switch (elements.length) {
    case 1:
      return defaultProjectName
    case 2:
      return elements[0].empty ? bnd_build : elements[0]
    default:
      return elements[0].empty ? elements[1] : elements[0]
  }
}.toSet()

/* Include the default project name if in a subproject or no tasks specified */
if ((startParameter.currentDir != rootDir) || projectNames.empty) {
  projectNames += defaultProjectName
}

/* If bnd_build used but declared empty, add all non-private folders of rootDir */
if (projectNames.remove('')) {
  rootDir.eachDir {
    def projectName = it.name
    if (!projectName.startsWith('.')) {
      projectNames += projectName
    }
  }
}

/* Add each project and its dependencies to the graph */
projectNames.each { projectName ->
  include projectName
  def project = getBndProject(workspace, projectName)
  project?.getDependson()*.getName().each {
    include it
  }
}

/* Get the bnd project for the specified project name */
def getBndProject(Workspace workspace, String projectName) {
  def project = workspace.getProject(projectName)
  if (project == null) {
    return null
  }
  project.prepare()
  if (project.isValid()) {
    return project
  }

  project.getInfo(workspace, "${rootDir} :")
  def errorCount = 0
  project.getWarnings().each {
    println "Warning: ${it}"
  }
  project.getErrors().each {
    println "Error  : ${it}"
    errorCount++
  }
  if (!project.isOk()) {
    def str = 'even though no errors were reported'
    if (errorCount == 1) {
      str = 'one error was reported'
    } else if (errorCount > 1) {
      str = "${errorCount} errors were reported"
    }
    throw new GradleException("Project ${rootDir}/${projectName} is invalid, ${str}")
  }
  throw new GradleException("Project ${rootDir}/${projectName} is not a valid bnd project")
}