require 'mavenReactorService/BasicInfoHandler'

# handle the dependencies and it's place holder
class DependencyHandler
  @@reactorHandler = ReactorHandler.new
  @@basicInfoHandler =  BasicInfoHandler.new
  @@projectURLArr= Array.new
    def projectPomDependencyHandler()
    efftive_pom_document = @@basicInfoHandler.copyTagsFromEffectivePom(Dir.getwd)
    alldependencies =  efftive_pom_document.at("project/dependencies")
    alldependencyManagement =  efftive_pom_document.at("project/dependencyManagement")
    if !alldependencies.nil?
      tempXml = "temp.xml"
      File.write(tempXml, alldependencies, File.size(tempXml), mode: 'a')
      puts "Dependencies are added"
    end
    if !alldependencyManagement.nil?
      tempXml = "temp.xml"
      File.write(tempXml, alldependencyManagement, File.size(tempXml), mode: 'a')
      puts "Dependency management is added"
    end
   end

  # return the dependency list of effetive-pom
  def getTempDependencyList()
    temp_pom_document = Nokogiri::XML(open("temp.xml"))
    dependencyList = Array.new
    temp_pom_document.css("project/dependencies/dependency").each do |eachDependecy|
      grpId = eachDependecy.at("groupId").text
      artifactId = eachDependecy.at("artifactId").text
      fullDependency = "#{grpId}:#{artifactId}"
      dependencyList.push(fullDependency)
    end
    return dependencyList
  end

  # return the union of dependencies in original-pom
  def getOriginalDependencyMap()
    pom_document =  @@basicInfoHandler.copyTagsFromOriginalPom(Dir.getwd)
    dependencyMap = Hash.new

    if (!pom_document.at_css("project/dependencyManagement/dependencies/dependency").nil?)
      pom_document.css("project/dependencyManagement/dependencies/dependency").each do |eachDependecy|
        grpId = eachDependecy.at("groupId").text
        artifactId = eachDependecy.at("artifactId").text
        fullDependency = "#{grpId}:#{artifactId}"
        version = nil
        if (!eachDependecy.at("version").nil?)
          version = eachDependecy.at("version").text
        end
        dependencyMap[fullDependency] = version
      end
    end

    if (!pom_document.at_css("project/dependencies/dependency").nil?)
      pom_document.css("project/dependencies/dependency").each do |eachDependecy|
        grpId = eachDependecy.at("groupId").text
        artifactId = eachDependecy.at("artifactId").text
        fullDependency = "#{grpId}:#{artifactId}"
        version = nil
        if (!eachDependecy.at("version").nil?)
          version = eachDependecy.at("version").text
        end
        exsistingDependency = dependencyMap[fullDependency]
        if (!exsistingDependency.nil? and !version.nil?)
          dependencyMap[fullDependency] = version
        end
      end
    end
    return dependencyMap
  end

  # return the union of dependencies in parent
  def getImmediateParentDependencyMap()
    pom_document = @@basicInfoHandler.copyTagsFromOriginalPom(Dir.getwd)
    parent = pom_document.at("project/parent")
    dependencyMap = Hash.new
    if !parent.nil?
      parent_pom_document =  getParentPomDomObjFromUrl(pom_document)
      if (!parent_pom_document.at_css("project/dependencyManagement/dependencies/dependency").nil?)
        parent_pom_document.css("project/dependencyManagement/dependencies/dependency").each do |eachDependecy|
          grpId = eachDependecy.at("groupId").text
          artifactId = eachDependecy.at("artifactId").text
          fullDependency = "#{grpId}:#{artifactId}"
          version = nil
          if (!eachDependecy.at("version").nil?)
            version = eachDependecy.at("version").text
          end
          dependencyMap[fullDependency] = version
        end
      end

      if (!parent_pom_document.at_css("project/dependencies/dependency").nil?)
        parent_pom_document.css("project/dependencies/dependency").each do |eachDependecy|
          grpId = eachDependecy.at("groupId").text
          artifactId = eachDependecy.at("artifactId").text
          fullDependency = "#{grpId}:#{artifactId}"
          version = nil
          if (!eachDependecy.at("version").nil?)
            version = eachDependecy.at("version").text
          end
          exsistingDependency = dependencyMap[fullDependency]
          if (!exsistingDependency.nil? and !version.nil?)
            dependencyMap[fullDependency] = version
          end
        end
      end

    end
    return dependencyMap
  end

  # return the union of dependencies in grand-parent
  def getgrandParentDependencyMap()
    pom_document = @@basicInfoHandler.copyTagsFromOriginalPom(Dir.getwd)
    parent = pom_document.at("project/parent")
    dependencyMap = Hash.new
    if !parent.nil?
      parent_pom_document =  getParentPomDomObjFromUrl(pom_document)
      grandParent = parent_pom_document.at("project/parent")
      if !grandParent.nil?
        grand_parent_pom_document =  getParentPomDomObjFromUrl(parent_pom_document)

        if (!grand_parent_pom_document.at_css("project/dependencyManagement/dependencies/dependency").nil?)
          grand_parent_pom_document.css("project/dependencyManagement/dependencies/dependency").each do |eachDependecy|
            grpId = eachDependecy.at("groupId").text
            artifactId = eachDependecy.at("artifactId").text
            fullDependency = "#{grpId}:#{artifactId}"
            version = nil
            if (!eachDependecy.at("version").nil?)
              version = eachDependecy.at("version").text
            end
            dependencyMap[fullDependency] = version
          end
        end

        if (!grand_parent_pom_document.at_css("project/dependencies/dependency").nil?)
          grand_parent_pom_document.css("project/dependencies/dependency").each do |eachDependecy|
            grpId = eachDependecy.at("groupId").text
            artifactId = eachDependecy.at("artifactId").text
            fullDependency = "#{grpId}:#{artifactId}"
            version = nil
            if (!eachDependecy.at("version").nil?)
              version = eachDependecy.at("version").text
            end
            exsistingDependency = dependencyMap[fullDependency]
            if (!exsistingDependency.nil? and !version.nil?)
              dependencyMap[fullDependency] = version
            end
          end
        end
      end
    end
    return dependencyMap
  end

  # create domobj of parent and grand parent
  def getParentPomDomObjFromUrl(pom_document)
    groupId =  pom_document.css("parent/groupId").text
    artifactId = pom_document.css("parent/artifactId").text
    version = pom_document.css("parent/version").text
    groupId = "#{groupId.gsub(".","/")}"
    urlArr =  getRepositories(pom_document)
    urlArr.each do |eachUrl|
      filteredUrl = "#{eachUrl}/#{groupId}/#{artifactId}/#{version}"
      begin
        pom_html_doc = Nokogiri::HTML(open(filteredUrl))
        latestPom = nil
        pom_html_doc.css('a').each do |eachref|
          if (eachref.text.end_with?".pom")
            latestPom = eachref.text
          end
        end
        filteredUrl = "#{filteredUrl}/#{latestPom}"
        parent_pom_document = Nokogiri::XML(open(filteredUrl))
        puts "External configuration POM URL found at :: #{filteredUrl}"
      rescue
      end
      if !parent_pom_document.nil?
        return parent_pom_document
      end
    end
  end
# indentify the actual url of parent
  def getRepositories(pom_document)
    reactorProjectArr = @@reactorHandler.getReactPOMRepos()
    origProjectPOMDoc = @@basicInfoHandler.copyTagsFromOriginalPom(Dir.getwd)
    origProjectPOMDoc.css("repositories/repository").each do |eachRepo|
      eachUrl =  eachRepo.at_css("url").text
      eachUrl = eachUrl.end_with?("/") ? eachUrl.chop : eachUrl
      if !(@@projectURLArr.include?eachUrl)
        @@projectURLArr.push(eachUrl)
      end
    end
    pom_document.css("repositories/repository").each do |eachRepo|
      eachUrl =  eachRepo.at_css("url").text
      eachUrl = eachUrl.end_with?("/") ? eachUrl.chop : eachUrl
      if !(@@projectURLArr.include?eachUrl)
        @@projectURLArr.push(eachUrl)
      end
    end
    
    reactorProjectArr.each do |eachReactURL|
      if !(@@projectURLArr.include?eachReactURL)
        @@projectURLArr.push(eachReactURL)
      end
    end
    return @@projectURLArr 
  end

  # This api takes decision to indentify the dependency where the place holder found.  #
  def findPlaceHolderWithinPoms(tempDependencyList,originalDependencyMap,parentDependencyMap,grandParentDependencyMap)
    if (!tempDependencyList.nil?)
      originalVersion = nil
      parentVersion = nil
      grandParentVersion = nil
      tempDependencyList.each do |eachDependency|
        if (!originalDependencyMap.empty?)
          originalVersion = originalDependencyMap[eachDependency]
        end
        if (!parentDependencyMap.empty?)
          parentVersion = parentDependencyMap[eachDependency]
        end
        if (!grandParentDependencyMap.empty?)
          grandParentVersion = grandParentDependencyMap[eachDependency]
        end
        if (!originalVersion.nil? and originalVersion.include? "${")
          replaceVersionInTempFile(eachDependency,originalVersion)
        elsif (!parentVersion.nil? and parentVersion.include? "${")
          replaceVersionInTempFile(eachDependency,parentVersion)
        elsif (!grandParentVersion.nil? and grandParentVersion.include? "${")
          replaceVersionInTempFile(eachDependency,grandParentVersion)
        end
      end
    end
  end

  # This api replace version by place-holder #
  def replaceVersionInTempFile (eachDependency,version)
    dependencyArr = eachDependency.split(":")
    gid = dependencyArr[0]
    artifactId = dependencyArr[1]
    temp_pom_document = Nokogiri::XML(open("temp.xml"))
    nokObj = Nokogiri::XML::Node
    dependeciesNode = temp_pom_document.at("project/dependencies")
    versionNode = nokObj.new("version",dependeciesNode)
    versionNode.content=version
    dependeciesNode.css("dependency").each do |tempDependency|
      replaceDependency=nil
      tempGid = tempDependency.at("groupId").text
      tempArtifactId = tempDependency.at("artifactId").text
      fullDependency = "#{tempGid}:#{tempArtifactId}"
      if (eachDependency == fullDependency)
        tempDependency.remove
        tempDependency.at("version").remove
        tempDependency.add_child(versionNode)
        dependeciesNode.add_child(tempDependency)
      end
    end
    formated_pom_doc = add_node_element("project",dependeciesNode,temp_pom_document)
    File.write("temp.xml", formated_pom_doc.to_xml)
  end

  # This api add child node in any tag #
  def add_node_element(childs_parent_name, child_element, pom_nokogiri)
    raise 'Parent tag is empty or nil' if childs_parent_name.nil? ||
    childs_parent_name.empty?
    raise 'Child element is nil' if child_element.nil?
    raise 'POM Document is nil' if pom_nokogiri.nil?
    childs_parent = pom_nokogiri.at_css(childs_parent_name)
    childs_parent.add_child(child_element)
    pom_nokogiri
  end

end