class Api::V1::Issues::CreateService < ApplicationService
  include ActiveModel::Model
  include Api::V1::Issues::Concerns::Checkable 
  include Api::V1::Issues::Concerns::Loadable 

  attr_reader :project, :current_user
  attr_reader :status_id, :priority_id, :milestone_id, :branch_name, :start_date, :due_date, :subject, :description, :blockchain_token_num
  attr_reader :issue_tag_ids, :assigner_ids, :attachment_ids, :receivers_login
  attr_accessor :created_issue

  validates :subject, presence: true
  validates :status_id, :priority_id, presence: true
  validates :project, :current_user, presence: true
  validates :blockchain_token_num, numericality: {greater_than: 0}, allow_blank: true

  def initialize(project, params, current_user = nil)
    @project = project 
    @current_user = current_user 
    @status_id = params[:status_id]
    @priority_id = params[:priority_id]
    @milestone_id = params[:milestone_id]
    @branch_name = params[:branch_name]
    @start_date = params[:start_date]
    @due_date = params[:due_date]
    @subject = params[:subject]
    @description = params[:description]
    @blockchain_token_num = params[:blockchain_token_num]
    @issue_tag_ids = params[:issue_tag_ids]
    @assigner_ids = params[:assigner_ids]
    @attachment_ids = params[:attachment_ids]
    @receivers_login = params[:receivers_login]
  end

  def call 
    raise Error, errors.full_messages.join(", ") unless valid? 
    ActiveRecord::Base.transaction do 
      check_issue_status(status_id)
      check_issue_priority(priority_id)
      check_milestone(milestone_id) if milestone_id.present?
      check_issue_tags(issue_tag_ids) unless issue_tag_ids.blank?
      check_assigners(assigner_ids) unless assigner_ids.blank?
      check_attachments(attachment_ids) unless attachment_ids.blank?
      check_atme_receivers(receivers_login) unless receivers_login.blank?
      check_blockchain_token_num(current_user.id, project.id, blockchain_token_num) if blockchain_token_num.present?
      load_assigners(assigner_ids) unless assigner_ids.blank?
      load_attachments(attachment_ids) unless attachment_ids.blank?
      load_issue_tags(issue_tag_ids) unless issue_tag_ids.blank?
      load_atme_receivers(receivers_login) unless receivers_login.blank?
    
      try_lock("Api::V1::Issues::CreateService:#{project.id}") # 开始写数据，加锁
      @created_issue = Issue.new(issue_attributes)
      build_author_participants
      build_assigner_participants unless assigner_ids.blank?
      build_atme_participants if @atme_receivers.present?
      build_issue_journal_details 
      build_issue_project_trends 
      @created_issue.assigners = @assigners unless assigner_ids.blank?
      @created_issue.attachments = @attachments unless attachment_ids.blank?
      @created_issue.issue_tags = @issue_tags unless issue_tag_ids.blank?
      
      @created_issue.issue_tags_value = @issue_tags.order("id asc").pluck(:id).join(",") unless issue_tag_ids.blank?
      @created_issue.save!

      if Site.has_blockchain? && @project.use_blockchain 
        if @created_issue.blockchain_token_num.present? && @created_issue.blockchain_token_num > 0 
          Blockchain::CreateIssue.call({user_id: current_user.id, project_id: @created_issue.project_id, token_num: @created_issue.blockchain_token_num})
        end
  
        push_activity_2_blockchain("issue_create", @created_issue) 
      end

      project.del_project_issue_cache_delete_count # 把缓存里存储项目删除issue的个数清除掉

      # 新增时向grimoirelab推送事件
      IssueWebhookJob.set(wait: 5.seconds).perform_later(@created_issue.id)

      # @信息发送
      AtmeService.call(current_user, @atme_receivers, @created_issue) unless receivers_login.blank?

      # 发消息
      if Site.has_notice_menu?
        SendTemplateMessageJob.perform_later('IssueAssigned', current_user.id, @created_issue&.id, assigner_ids) unless assigner_ids.blank?
        SendTemplateMessageJob.perform_later('ProjectIssue', current_user.id, @created_issue&.id)
      end

      # 触发webhook
      TouchWebhookJob.set(wait: 5.seconds).perform_later('IssueCreate', @created_issue&.id, current_user.id)
      TouchWebhookJob.set(wait: 5.seconds).perform_later('IssueLabel', @created_issue&.id, current_user.id, {issue_tag_ids: [[], issue_tag_ids]}) unless issue_tag_ids.blank?
      TouchWebhookJob.set(wait: 5.seconds).perform_later('IssueAssign', @created_issue&.id, current_user.id, {assigner_ids: [[], assigner_ids]}) unless assigner_ids.blank?
      unlock("Api::V1::Issues::CreateService:#{project.id}") # 结束写数据，解锁
    end
    
    return @created_issue
  end

  private 

  def issue_attributes 
    issue_attributes = {
      subject: subject,
      project_id: project.id,
      author_id: current_user.id,
      tracker_id: Tracker.first.id,
      status_id: status_id, 
      priority_id: priority_id,
      project_issues_index: (project.get_last_project_issues_index + 1),
      issue_type: "1",
      issue_classify: "issue"
    }

    issue_attributes.merge!({description: description}) if description.present?
    issue_attributes.merge!({fixed_version_id: milestone_id}) if milestone_id.present?
    issue_attributes.merge!({start_date: start_date}) if start_date.present?
    issue_attributes.merge!({due_date: due_date}) if due_date.present?
    issue_attributes.merge!({branch_name: branch_name}) if branch_name.present?
    issue_attributes.merge!({blockchain_token_num: blockchain_token_num}) if blockchain_token_num.present?

    issue_attributes
  end

  def build_author_participants 
    @created_issue.issue_participants.new({participant_type: "authored", participant_id: current_user.id})
  end

  def build_assigner_participants
    assigner_ids.each do |aid|
      @created_issue.issue_participants.new({participant_type: "assigned", participant_id: aid})
    end
  end

  def build_atme_participants
    @atme_receivers.each do |receiver|
      @created_issue.issue_participants.new({participant_type: "atme", participant_id: receiver.id})
    end
  end

  def build_issue_project_trends
    @created_issue.project_trends.new({user_id: current_user.id, project_id: @project.id, action_type: "create"})
    @created_issue.project_trends.new({user_id: current_user.id, project_id: @project.id, action_type: ProjectTrend::CLOSE}) if status_id.to_i == 5
  end

  def build_issue_journal_details
    journal = @created_issue.journals.new({user_id: current_user.id})
    journal.journal_details.new({property: "issue", prop_key: 1, old_value: '', value: ''})
  end 
end