class PluginManagementHandler
  @@reactorHandler = ReactorHandler.new
  @@dependencyHandler = DependencyHandler.new
  @@mvnReactorization = MvnReactorization.new
  def handlePluginManagement(project_dir)
    commonPluginList = findCommonPlugins(project_dir)
    putCommonPluginInReactorPom(project_dir,commonPluginList)
    removePluginversionFromChildModule(project_dir,commonPluginList,"/plugins")
    removePluginversionFromChildModule(project_dir,commonPluginList,"/pluginManagement/")
  end

  def findCommonPlugins(project_dir)
    pomArr =  @@reactorHandler.fetchGidArtifactIdAndVersionFromChildModule(project_dir,false)
    if  !(pomArr.nil? || pomArr.empty?)
      allPluginList = Array.new
      allPluginManagementList = Array.new
      masterList = Array.new
      pomArr.each do |eachPomPath|
        pom_document =  @@reactorHandler.parse_xml_from_file(eachPomPath)
        pluginList = findAllPluginsOfAProject(pom_document,"project/build/plugins/plugin")
        allPluginList.push(pluginList.uniq)
        pluginManagementList = findAllPluginsOfAProject(pom_document,"project/build/pluginManagement/plugins/plugin")
        allPluginManagementList.push(pluginManagementList.uniq)
        mergedList =  mergePlugins(pluginList,pluginManagementList)
        filterList = addVersionOfMergedList(pom_document,mergedList)
        masterList.push(filterList.uniq)
      end
      commonDependencyList = findCommonPluginsFromMasterList(masterList)
      return commonDependencyList
    end
  end

  def findCommonPluginsFromMasterList(masterList)
    commonDependencyList = Array.new
    masterList.each_with_index do |eachPomDependencyList,index|
      if index==0
        commonDependencyList = eachPomDependencyList
      else
        commonDependencyList = commonDependencyList & eachPomDependencyList
      end
    end
    return commonDependencyList
  end

  def findAllPluginsOfAProject(pom_document,tag)
    commonPluginArr = Array.new
    pom_document.css(tag).each do |eachPlugin|
      grpId=nil
      if (eachPlugin.at("groupId").nil?)
        grpId="org.apache.maven.plugins"
      else
        grpId = eachPlugin.at("groupId").text
      end
      artifactId =  eachPlugin.at("artifactId").text
      version=nil
      if (!eachPlugin.at("version").nil? and eachPlugin.at("version").parent.name=="plugin")
        version =  eachPlugin.at("version").text
      end
      fullArtifactId = "#{grpId}:#{artifactId}:#{version}"
      if !(commonPluginArr.include?fullArtifactId)
        commonPluginArr.push(fullArtifactId)
      end
    end
    return commonPluginArr
  end

  def mergePlugins(allPluginList,allPluginManagementList)
    pluginListWithoutVersion = Array.new
    pluginManagementListWithoutVersion = Array.new
    allPluginList.each do |eachPlugin|
      eachPluginArr = eachPlugin.split(":")
      cordinatePlugin = "#{eachPluginArr[0]}:#{eachPluginArr[1]}"
      pluginListWithoutVersion.push(cordinatePlugin)
    end
    allPluginManagementList.each do |eachPlugin|
      eachPluginArr = eachPlugin.split(":")
      cordinatePlugin = "#{eachPluginArr[0]}:#{eachPluginArr[1]}"
      pluginManagementListWithoutVersion.push(cordinatePlugin)
    end
    commonPluginList = pluginListWithoutVersion & pluginManagementListWithoutVersion
    uncommonPluginList = (pluginListWithoutVersion+pluginManagementListWithoutVersion) - (pluginListWithoutVersion&pluginManagementListWithoutVersion)
    mergedList = commonPluginList + uncommonPluginList
    return mergedList
  end

  def addVersionOfMergedList(pom_document,mergedList)
    filterMergedList = Array.new
    mergedList.each do |eachEntry|
      pluginNode =  pom_document.css ("project/build/plugins/plugin")
      pluginManagementNode =  pom_document.css ("project/build/pluginManagement/plugins/plugin")
      plugins = findVersionFromPlugin(eachEntry,pluginNode,pom_document)
      if plugins.nil?
        plugins = findVersionFromPlugin(eachEntry,pluginManagementNode,pom_document)
      end
      filterMergedList.push(plugins)
    end
    return filterMergedList
  end

  def findVersionFromPlugin(eachEntry,nodeObj,pom_document)
    cordinatedependency = nil
    nodeObj.each do |eachNode|
      grpId=nil
      if (eachNode.at("groupId").nil?)
        grpId="org.apache.maven.plugins"
      else
        grpId = eachNode.at("groupId").text
      end
      artifactId = eachNode.at("artifactId").text
      fullDependency = "#{grpId}:#{artifactId}"
      if fullDependency == eachEntry
        if (eachNode.at("version") and eachNode.at("version").parent.name == "plugin")
          version = eachNode.at("version").text
          if version.include?"${"
            version =  findPropValue(version,pom_document)
          end
          cordinatedependency = "#{fullDependency}:#{version}"
        end
      end
    end
    return cordinatedependency
  end

  def findPropValue(propertyVal,pom_document)
    pom_document.css("project/properties").children.each do |prop|
      propTag =  "${#{prop.name}}"
      if propertyVal == propTag
        return prop.text
      end
    end
  end

  def putCommonPluginInReactorPom(project_directory,commonList)
    pomPath = "#{project_directory}/pom.xml"
    pom_document =  @@reactorHandler.parse_xml_from_file(pomPath)
    nokObj = Nokogiri::XML::Node
    projectNode = pom_document.at("project")
    buildNode=nil
    pluginManagementNode = nil
    pluginsNode=nil
    if (@@reactorHandler.tag_exists?("build/pluginManagement",pom_document) and commonList.length>0)
      buildNode = pom_document.at("project/build")
      pluginManagementNode = pom_document.at("project/build/pluginManagement")
      pluginsNode = pom_document.at("project/build/pluginManagement/plugins")
    elsif (!commonList.nil? and commonList.length>0)
      buildNode = nokObj.new("build",projectNode)
      pluginManagementNode = nokObj.new("pluginManagement",projectNode)
      pluginsNode = nokObj.new("plugins",projectNode)
    end
    if (!commonList.nil? and commonList.length>0)
      commonList.each do |eachplugin|
        pluginArr =  eachplugin.split(":")
        gid = pluginArr[0]
        artifactId =  pluginArr[1]
        version = pluginArr[2]
        pluginNode = nokObj.new("plugin",projectNode)
        grpNode = nokObj.new("groupId",projectNode)
        grpNode.content=gid
        artifactNode = nokObj.new("artifactId",projectNode)
        artifactNode.content=artifactId
        versionNode = nokObj.new("version",projectNode)
        versionNode.content=version
        pluginNode.add_child(grpNode)
        pluginNode.add_child(artifactNode)
        pluginNode.add_child(versionNode)
        pluginsNode.add_child(pluginNode)
      end
      if !buildNode.nil?
        pluginManagementNode.add_child(pluginsNode)
        buildNode.add_child(pluginManagementNode)
        @@dependencyHandler.add_node_element('//project', buildNode, pom_document)
        @@mvnReactorization.write_nokogiri_to_xml(pomPath, pom_document)
        puts "Plugin management is added in reactor pom"
      end
    end
  end

  def removePluginversionFromChildModule(project_directory_path,commonArr,tag)
    commonPlugArr = Array.new
    commonArr.each do |eachPlug|
      plugArr = eachPlug.split(":")
      cordinatePlug = "#{plugArr[0]}:#{plugArr[1]}"
      commonPlugArr.push(cordinatePlug)
    end
    pomArr =  @@reactorHandler.fetchGidArtifactIdAndVersionFromChildModule(project_directory_path,false)
    if  !(pomArr.nil? || pomArr.empty?)
      pomArr.each do |eachPomPath|
        pom_document =  @@reactorHandler.parse_xml_from_file(eachPomPath)
        pluginsNode=nil
        if tag.include?"/pluginManagement/"
          pluginsNode = pom_document.at("build/pluginManagement/plugins")
        else
          pluginsNode = pom_document.at("build/plugins")
        end
        if !pluginsNode.nil?
          pluginsNode.css("plugin").each do |eachplugin|
            grpId=nil
            if (eachplugin.at("groupId").nil?)
              grpId="org.apache.maven.plugins"
            else
              grpId = eachplugin.at("groupId").text
            end
            artifactId = eachplugin.at("artifactId").text
            versionNode = eachplugin.at("version")
            if (!versionNode.nil? and versionNode.parent.name == "plugin")
              version = versionNode.text
              fullPlugin = "#{grpId}:#{artifactId}"
              if (commonPlugArr.include?fullPlugin)
                versionNode.remove
              end
            end
          end
          @@mvnReactorization.write_nokogiri_to_xml(eachPomPath, pom_document)
        end
      end
    end
  end

  def comparePluginManagementFromChildModule(project_directory_path)
    pomArr =  @@reactorHandler.fetchGidArtifactIdAndVersionFromChildModule(project_directory_path,false)
    if  !(pomArr.nil? || pomArr.empty?)
      pomArr.each do |eachPomPath|
        pom_document =  @@reactorHandler.parse_xml_from_file(eachPomPath)
        pom_document.css("project/build/pluginManagement/plugins/plugin").each do |eachPlugin|
          eachPlugin.children.each do |eachNode|
            if !(eachNode.name == "groupId" or eachNode.name == "artifactId" or eachNode.name == "version" or eachNode.name == "text")
              grpId=nil
              if (eachPlugin.at("groupId").nil? or eachPlugin.at("groupId").parent.name != "plugin")
                grpId="org.apache.maven.plugins"
              else
                grpId = eachPlugin.at("groupId").text
              end
              artifactId = eachPlugin.at("artifactId").text
              versionNode = eachPlugin.at("version")
              cordinate = "#{grpId}:#{artifactId}"
              searchCommonPluginInPlugins(eachPomPath,pom_document,cordinate,eachNode,versionNode)
            end
          end
        end
      end
    end
  end

  def searchCommonPluginInPlugins(eachPomPath,pom_document,cordinate,eachNode,versionNode)
    pom_document.css("project/build/plugins/plugin").each do |eachPlugin|
      grpId=nil
      if (eachPlugin.at("groupId").nil? or eachPlugin.at("groupId").parent.name != "plugin")
        grpId="org.apache.maven.plugins"
      else
        grpId = eachPlugin.at("groupId").text
      end
      artifactId = eachPlugin.at("artifactId").text
      pluginCordinate = "#{grpId}:#{artifactId}"
      if (cordinate == pluginCordinate)
        nodeName = eachNode.name
        if (eachPlugin.at(nodeName).nil? or eachPlugin.at(nodeName).parent.name != "plugin")
          eachPlugin.add_child(eachNode)
          if (eachPlugin.at("version").nil? or eachPlugin.at("version").parent.name != "plugin")
            version = versionNode.text
            nokObj = Nokogiri::XML::Node
            newVersionNode = nokObj.new("version",eachPlugin)
            newVersionNode.content = version
            eachPlugin.add_child(newVersionNode)
          end
          @@mvnReactorization.write_nokogiri_to_xml(eachPomPath, pom_document)
        end
      end
    end
  end

  def copyPluginFromPluginManagement(pom_document,eachPlugin)
    grpId=nil
    if (eachPlugin.at("groupId").nil? or eachPlugin.at("groupId").parent.name != "plugin")
      grpId="org.apache.maven.plugins"
    else
      grpId = eachPlugin.at("groupId").text
    end
    artifactId = eachPlugin.at("artifactId").text
    cordinate = "#{grpId}:#{artifactId}"
    searchPluginInPlugins(pom_document,cordinate)
  end

  def searchPluginInPlugins(pom_document,cordinate)
    isPluginRequired = true
    pom_document.css("project/build/plugins/plugin").each do |eachPlugin|
      grpId=nil
      if (eachPlugin.at("groupId").nil? or eachPlugin.at("groupId").parent.name != "plugin")
        grpId="org.apache.maven.plugins"
      else
        grpId = eachPlugin.at("groupId").text
      end
      artifactId = eachPlugin.at("artifactId").text
      pluginCordinate = "#{grpId}:#{artifactId}"
      if (pluginCordinate == cordinate)
        puts "Working:::::::::::::::::"
        puts pluginCordinate
        isPluginRequired=false
      end
    end
  end

  def findCommonPluginFromPluginManagement(project_directory_path)
    pomArr =  @@reactorHandler.fetchGidArtifactIdAndVersionFromChildModule(project_directory_path,false)
    if  !(pomArr.nil? || pomArr.empty?)
      pomArr.each do |eachPomPath|
        pluginList = Hash.new
        pom_document =  @@reactorHandler.parse_xml_from_file(eachPomPath)
        pom_document.css("project/build/pluginManagement/plugins/plugin").each do |eachPlugin|
          grpId=nil
          if (eachPlugin.at("groupId").nil? or eachPlugin.at("groupId").parent.name != "plugin")
            grpId="org.apache.maven.plugins"
          else
            grpId = eachPlugin.at("groupId").text
          end
          artifactId = eachPlugin.at("artifactId").text
          pluginCordinate = "#{grpId}:#{artifactId}"
          pluginList[pluginCordinate] = eachPlugin
        end
        pluginsList =  findCommonPluginFromPlugins(pom_document,pluginList)
        putPluginVersionIfNotFoundInPlugins(eachPomPath,pom_document,pluginList,"project/build/plugins/plugin")
        putPluginVersionIfNotFoundInPlugins(eachPomPath,pom_document,pluginList,"project/reporting/plugins/plugin")
        putUncommonPlugin(eachPomPath,pom_document,pluginList,pluginsList,"project/build/plugins")
        removePluginManagementTag(pom_document)
        @@mvnReactorization.write_nokogiri_to_xml(eachPomPath, pom_document)
      end
    end
  end

  def putPluginVersionIfNotFoundInPlugins(eachPomPath,pom_document,pluginList,tag)
    pluginList.each do |key,val|
      versionNode = val.at("version")
      pom_document.css(tag).each do |eachPlugin|
        grpId=nil
        if (eachPlugin.at("groupId").nil? or eachPlugin.at("groupId").parent.name != "plugin")
          grpId="org.apache.maven.plugins"
        else
          grpId = eachPlugin.at("groupId").text
        end
        artifactId = eachPlugin.at("artifactId").text
        pluginCordinate = "#{grpId}:#{artifactId}"
        if ((!versionNode.nil?) and (key==pluginCordinate) and (eachPlugin.at("version").nil? or eachPlugin.at("version").parent.name !="plugin"))
          version = versionNode.text
          nokObj = Nokogiri::XML::Node
          newVersionNode = nokObj.new("version",eachPlugin)
          newVersionNode.content = version
          eachPlugin.add_child(newVersionNode)
        end
      end
    end
  end

  def findCommonPluginFromPlugins(pom_document,pluginList)
    pluginsList = Array.new
    pom_document.css("project/build/plugins/plugin").each do |eachPlugin|
      grpId=nil
      if (eachPlugin.at("groupId").nil? or eachPlugin.at("groupId").parent.name != "plugin")
        grpId="org.apache.maven.plugins"
      else
        grpId = eachPlugin.at("groupId").text
      end
      artifactId = eachPlugin.at("artifactId").text
      pluginCordinate = "#{grpId}:#{artifactId}"
      pluginsList.push(pluginCordinate)
    end
    return pluginsList
  end

  def putUncommonPlugin(eachPomPath,pom_document,pluginList,pluginsList,tag)
    pluginsNode = pom_document.at(tag)
    pluginList.each do |key,val|
      if (!pluginsList.include?key)
        puts "Mismatch plugin found in #{eachPomPath}"
        pluginsNode.add_child(val)
      end
    end
  end

  def removePluginManagementTag(pom_document)
    pluginManagementNode = pom_document.at("project/build/pluginManagement")
    if !pluginManagementNode.nil?
      pluginManagementNode.remove
    end
  end

  def executeShortPom()
    result =  `mvn com.github.ekryd.sortpom:sortpom-maven-plugin:sort`
    puts result
    puts "All poms are sorted by sort-pom plugin"
  end
end