#encoding: utf-8
# Redmine - project management software
# Copyright (C) 2006-2013  Jean-Philippe Lang
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

class Message < ActiveRecord::Base
  require 'net/http'
  require 'json'
  include Redmine::SafeAttributes
  include UserScoreHelper
  include ApplicationHelper
  has_many_kindeditor_assets :assets, :dependent => :destroy
  belongs_to :board,:touch => true
  belongs_to :author, :class_name => 'User', :foreign_key => 'author_id'
  has_many :praise_tread, as: :praise_tread_object, dependent: :destroy
  has_one :praise_tread_cache, as: :object, dependent: :destroy
  # has_many :org_subfield_messages, :dependent => :destroy
  # has_many :org_subfields, :through => :org_subfield_messages

  acts_as_tree :counter_cache => :replies_count, :order => "#{Message.table_name}.created_on ASC"
  acts_as_attachable
  belongs_to :last_reply, :class_name => 'Message', :foreign_key => 'last_reply_id'

  # added by fq
  has_many :acts, :class_name => 'Activity', :as => :act, :dependent => :destroy
  # 被ForgeActivity虚拟关联
  has_many :forge_acts, :class_name => 'ForgeActivity',:as =>:forge_act ,:dependent => :destroy
  # 课程动态
  has_many :course_acts, :class_name => 'CourseActivity',:as =>:course_act ,:dependent => :destroy
  # 竞赛动态
  has_many :contest_acts, :class_name => 'ContestActivity',:as =>:contest_act ,:dependent => :destroy
  # end
  # 课程/项目 消息
  has_many :course_messages, :class_name =>'CourseMessage', :as => :course_message, :dependent => :destroy
  has_many :forge_messages, :class_name => 'ForgeMessage', :as => :forge_message, :dependent => :destroy
  has_many :contest_messages, :class_name =>'ContestMessage', :as => :contest_message, :dependent => :destroy
  has_many :at_messages, as: :at_message, dependent: :destroy

  has_many :ActivityNotifies,:as => :activity, :dependent => :destroy
  has_many :tidings, :as => :container , :dependent => :destroy

  belongs_to :reply, :class_name => 'Message', :foreign_key => 'reply_id'
  #has_one :message_detail, :dependent => :destroy
  has_one :message_detail, dependent: :destroy

  #转发表
  has_many :forwards, :as => :from, :dependent => :destroy
  after_destroy :delete_org_activities

  acts_as_searchable :columns => ['subject', 'content'],
                     :include => {:board => :project},
                     :project_key => "#{Board.table_name}.project_id",
                     :date_column => "#{table_name}.created_on"
  acts_as_searchable :columns => ['subject', 'content'],
                     :include => {:board => :course},
                     :course_key => "#{Board.table_name}.course_id",
                     :date_column => "#{table_name}.created_at"
  acts_as_event :title => Proc.new {|o| "#{o.board.name}: #{o.subject}"},
                :description => :content,
                :datetime => :updated_on,
                # :datetime => "#{Message.table_name}.created_on",
                :group => :parent,
                :type => Proc.new {|o| o.parent_id.nil? ? 'message' : 'reply'},
                :url => Proc.new {|o| {:controller => 'messages', :action => 'show', :board_id => o.board_id}.merge(o.parent_id.nil? ? {:id => o.id} :
                                                                                                                        {:id => o.parent_id, :r => o.id, :anchor => "message-#{o.id}"})}

  acts_as_activity_provider :find_options => {:include => [{:board => :project}, :author]},
                            :author_key => :author_id
  acts_as_activity_provider :find_options => {:include => [{:board => :course}, :author]},
                            :type => 'course_messages',
                            :author_key => :author_id
  acts_as_watchable

  validates_presence_of :board, :subject, :content
  validates_length_of :subject, :maximum => 255
  validate :cannot_reply_to_locked_topic, :on => :create

  # after_create :add_author_as_watcher, :reset_counters!, :add_boards_count
  after_update :update_messages_board, :update_activity
  after_destroy :reset_counters!,:down_user_score,:delete_kindeditor_assets, :decrease_boards_count, :down_course_score
  after_create :act_as_course_activity, :act_as_student_score, act_as_at_message(:content, :author_id), :add_author_as_watcher, :reset_counters!, :add_boards_count, :send_tiding
  #before_save :be_user_score

  scope :visible, lambda {|*args|
    includes(:board => :project).where(Project.allowed_to_condition(args.shift || User.current, :view_messages, *args))
  }

  scope :course_visible, lambda {|*args|
    includes(:board => :course).where(Course.allowed_to_condition(args.shift || User.current, :view_course_messages, *args))
  }


  safe_attributes 'subject', 'reply_id', 'root_id', 'visits'
  safe_attributes  'board_id','locked', 'sticky',
                   :if => lambda {|message, user|
                     if message.project
                       user.allowed_to?(:edit_messages, message.project)
                     elsif message.course
                       user.allowed_to?(:edit_messages, message.course)
                     elsif message.contest
                       user.admin_of_contest?(message.contest)
                     end
                   }

  def description
    message_detail.try(:content)
  end

  def content
    message_detail.try(:content)
  end

  # def content
  #   self.try(:content)
  # end

  def topic?
    parent_id.nil?
  end

  def visible?(user=User.current)
    if project
      !user.nil? && user.allowed_to?(:view_messages, project)
    elsif course
      !user.nil? && user.allowed_to?(:view_messages, course)
    end
  end

  def cannot_reply_to_locked_topic
    # Can not reply to a locked topic
    errors.add :base, 'Topic is locked' if root.locked? && self != root
  end

  def update_messages_board
    if board_id_changed?
      Message.update_all({:board_id => board_id}, ["id = ? OR parent_id = ?", root.id, root.id])
      Board.reset_counters!(board_id_was)
      Board.reset_counters!(board_id)
    end
  end

  # 发帖精辟更新发帖总数
  def add_boards_count
    if self.project && !project.project_score.nil?
      # 讨论区
      if self.parent_id.nil?
        count = self.project.project_score.board_num.to_i + 1
        self.project.project_score.update_column(:board_num, count)
      else # 回复
        count = self.project.project_score.board_message_num.to_i + 1
        self.project.project_score.update_column(:board_message_num, count)
      end
    end
  end

  # 删除帖子的时候更新帖子总数, 删除回复的时候总数不减少
  def decrease_boards_count
    if self.project && !project.project_score.nil?
      # 讨论区
      if self.parent_id.nil?
        count = self.project.project_score.board_num - 1
        self.project.project_score.update_attribute(:board_num, count < 0 ? 0 : count)
      else # 回复
        count = self.project.project_score.board_message_num - 1
        self.project.project_score.update_attribute(:board_message_num, count < 0 ? 0 : count)
      end
    end
  end

  # 有很大的性能隐患，没做注释？为什么要更新为最大ID？
  def reset_counters!
    if parent && parent.id
      parent.update_column(:last_reply_id, parent.children.maximum(:id))
    end
    if root
      root.update_attribute(:last_reply_id, Message.where(:root_id => root.id).maximum(:id)) unless root.destroyed?
    end
    # board.reset_counters!
  end

  def sticky=(arg)
    write_attribute :sticky, (arg == true || arg.to_s == '1' ? 1 : 0)
  end

  def sticky?
    sticky == 1
  end

  def project
    board.project
  end

  def course
    board.course
  end

  def contest
    board.contest
  end

  def contest_editable_by?(usr)
    usr && usr.logged? && (usr.admin_of_contest?(contest) || self.author == usr || usr.admin?)
  end

  def contest_destroyable_by?(usr)
    usr && usr.logged? && (usr.admin_of_contest?(contest) || self.author == usr || usr.admin?)
  end

  def course_editable_by?(usr)
    usr && usr.logged? && (usr.allowed_to?(:edit_messages, course) || (self.author == usr && usr.allowed_to?(:edit_own_messages, course)))
  end

  def org_subfield_editable_by?(usr)
    usr && usr.logged? && (usr.admin?  || self.author == usr ||usr.admin_of_org?(self.board.org_subfield.organization))
  end

  def course_destroyable_by?(usr)
    usr && usr.logged? && (usr.allowed_to?(:delete_messages, course) || (self.author == usr && usr.allowed_to?(:delete_own_messages, course)))
  end

  def editable_by?(usr)
    usr && usr.logged? && (usr.allowed_to?(:edit_messages, project) || (self.author == usr && usr.allowed_to?(:edit_own_messages, project)))
  end

  def destroyable_by?(usr)
    usr && usr.logged? && (usr.allowed_to?(:delete_messages, project) || (self.author == usr && usr.allowed_to?(:delete_own_messages, project)))
  end

  def set_notify_id(notify_id)
    @notify_id= notify_id
  end
  def get_notify_id()
    return @notify_id
  end
  def set_notify_is_read(notify_is_read)
    @notify_is_read = notify_is_read
  end
  def get_notify_is_read()
    return @notify_is_read
  end
  #动态的更新
  def update_activity
    update_course_activity(self.class, self.id)
    update_contest_activity(self.class, self.id)
    update_user_activity(self.class, self.id)
    update_forge_activity(self.class, self.id)
    update_org_activity(self.class, self.id)
  end

  def creator_user
    self.author
  end

  def created_time
    self.created_on
  end

  def content_detail
    self.content
  end

  private

  def add_author_as_watcher
    Watcher.create(:watchable => self.root, :user => author)
  end

  # fq
  def act_as_activity
    self.acts << Activity.new(:user_id => self.author_id)
  end
  # end

  # Time 2015-02-27 14:32:25
  # Author lizanle
  # Description 
  def act_as_forge_activity
    # 如果project为空，那么就是课程相关的消息
    if self.board.project_id != -1 && self.parent_id.nil?
      self.forge_acts << ForgeActivity.new(:user_id => self.author_id, :project_id => self.board.project.id)
    end
  end

  #课程动态公共表记录
  def act_as_course_activity
    if self.course && self.parent_id.nil?
      self.course_acts << CourseActivity.new(:user_id => self.author_id,:course_id => self.board.course_id)
    end
  end

  #竞赛动态公共表记录
  def act_as_contest_activity
    if self.contest && self.parent_id.nil?
      self.contest_acts << ContestActivity.new(:user_id => self.author_id,:contest_id => self.board.contest_id)
    end
  end

  # 课程讨论区添加消息:
  # 老师或助教发帖所有人都能收到消息
  # 直接回复帖子，给帖子发布人发送
  # 多级回复帖子，给被回复人发送
  # 回复若使用了@，同时给被@人发消息
  # 项目同课堂
  def send_tiding
    if self.course
      if self.parent_id.nil? || self.parent_id==0  # 主贴
        if self.author.allowed_to?(:as_teacher, self.course)
          str = ""
          self.course.members.select{|m| m.user_id != self.author_id}.each do |m|
            str += "," if str != ""
            str += "('#{m.user_id}',#{self.author_id},#{self.id}, '#{self.class.to_s}', #{self.id}, 'Message', #{self.course.id} ,'Course', '0', 'Comment', '#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}', '#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}')"
          end
          if str != ""
            sql = "insert into tidings (user_id, trigger_user_id, container_id, container_type, parent_container_id, parent_container_type, belong_container_id, belong_container_type, viewed, tiding_type, created_at, updated_at) values" + str
            ActiveRecord::Base.connection.execute sql
          end
        end
      else    # 回帖
        parent_author_id = self.parent.author_id
        if parent_author_id != self.author_id && !self.tidings.where(:user_id => parent_author_id, :trigger_user_id => self.author_id, :tiding_type => "Mentioned").first.present? # 只针对主贴回复，回复自己的帖子不发消息
          # self.course_messages << CourseMessage.new(:user_id => parent_author_id, :course_id => self.board.course_id, :viewed => false)
          self.tidings << Tiding.new(:user_id => parent_author_id, :trigger_user_id => self.author_id, :parent_container_id => self.root_id, :parent_container_type => "Message",
                                     :belong_container_id => self.course.id, :belong_container_type => "Course", :viewed => 0, :tiding_type => "Comment")
        end
      end
    elsif self.project  # 项目相关
      if self.parent_id.nil?  # 主贴
        if self.author.manager_of_project?(self.project.id)
          str = ""
          self.project.members.select{|m| m.user_id != self.author_id}.each do |m|
            str += "," if str != ""
            str += "('#{m.user_id}',#{self.author_id},#{self.id}, '#{self.class.to_s}', #{self.id}, 'Message', #{self.project.id} ,'Project', '0', 'Comment', '#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}', '#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}')"
          end
          if str != ""
            sql = "insert into tidings (user_id, trigger_user_id, container_id, container_type, parent_container_id, parent_container_type, belong_container_id, belong_container_type, viewed, tiding_type, created_at, updated_at) values" + str
            ActiveRecord::Base.connection.execute sql
          end
        end
      else    # 回帖
        parent_author_id = self.parent.author_id
        if parent_author_id != self.author_id && !self.tidings.where(:user_id => parent_author_id, :trigger_user_id => self.author_id, :tiding_type => "Mentioned").first.present? # 只针对主贴回复，回复自己的帖子不发消息
          # self.forge_messages << ForgeMessage.new(:user_id => parent_author_id, :project_id => self.board.project_id, :viewed => false)
          self.tidings << Tiding.new(:user_id => parent_author_id, :trigger_user_id => self.author_id, :parent_container_id => self.root_id, :parent_container_type => "Message",
                                     :belong_container_id => self.course.id, :belong_container_type => "Project", :viewed => 0, :tiding_type => "Comment")
        end
      end
    elsif self.contest
      if self.parent_id.nil?   # 主贴
        self.contest.contest_members.includes(:user).each do |m|
          if self.author.admin_of_contest?(self.contest) &&  m.user_id != self.author_id   # 老师 自己的帖子不给自己发送消息
            #self.course_messages << CourseMessage.new(:user_id => m.user_id, :course_id => self.board.course_id, :viewed => false)
            # count = ShieldWechatMessage.where("container_type='User' and container_id=#{m.user_id} and shield_type='Course' and shield_id=#{self.course.id}").count
            # if count == 0
            #   content = strip_html self.subject, 200
            #   ws.topic_publish_template m.user_id, "course_discussion", self.id, "#{l(:label_course_topic_template)}", content, self.author.try(:realname), format_time(self.created_on)
            # end
          end
        end
      else    # 回帖
        parent_author_id = Message.find(self.parent_id).author_id
        if parent_author_id != self.author_id  # 只针对主贴回复，回复自己的帖子不发消息
          self.contest_messages << ContestMessage.new(:user_id => parent_author_id, :contest_id => self.board.contest_id, :viewed => false)
          # count = ShieldWechatMessage.where("container_type='User' and container_id=#{parent_author_id} and shield_type='Course' and shield_id=#{self.board.course_id}").count
          # if count == 0
          #   content = strip_html self.content.html_safe, 200
          #   ws.comment_template parent_author_id, "course_discussion", self.parent_id, "#{l(:label_topic_comment_template)}", self.author.try(:realname), format_time(self.created_on), content
          # end
        end
      end
    end
  end

  def delay_message_send
    if self.course
      if self.parent_id.nil?   # 发帖
        dm = []
        self.course.members.includes(:user).each do |m|
          if self.author.allowed_to?(:as_teacher, self.course) &&  m.user_id != self.author_id   # 老师 自己的帖子不给自己发送消息
            dm << {course_message_type:'Message',course_message_id:self.id, :user_id => m.user_id,
                   :course_id => self.board.course_id, :viewed => false}
            if dm.size >= 30
              self.delay.contain_messages_message(dm)
              dm.clear
            end
          end
        end

        unless dm.empty?
          self.delay.contain_messages_message(dm)
        end

      end
    elsif self.contest
      if self.parent_id.nil?   # 发帖
        dm = []
        self.contest.contest_members.includes(:user).each do |m|
          if self.author.admin_of_contest?(self.contest) &&  m.user_id != self.author_id   # 老师 自己的帖子不给自己发送消息
            dm << {contest_message_type:'Message',contest_message_id:self.id, :user_id => m.user_id,
                   :contest_id => self.board.contest_id, :viewed => false}
            if dm.size >= 30
              self.delay.contain_contest_messages_message(dm)
              dm.clear
            end
          end
        end

        unless dm.empty?
          self.delay.contain_contest_messages_message(dm)
        end

      end
    end
  end

  def contain_messages_message vs
    CourseMessage.create(vs)
  end

  def contain_contest_messages_message vs
    ContestMessage.create(vs)
  end

  #更新用户分数     -by zjc
  def be_user_score
    #新建message且无parent的为发帖
    if self.parent_id.nil? && !self.board.project.nil?
      UserScore.joint(:post_message, self.author,nil,self, { message_id: self.id })
      update_memo_number(self.author,1)
      if self.board.project_id != -1
        update_memo_number(self.author,2,self.board.project)
      end
      #新建message且有parent的为回帖
    elsif !self.parent_id.nil? && !self.board.project.nil?
      UserScore.joint(:reply_posting, self.author,self.parent.author,self, { message_id: self.id })
      update_replay_for_memo(self.author,1)
      if self.board.project_id != -1
        update_replay_for_memo(self.author,2,self.board.project)
      end
    end
  end

  #减少用户分数
  def down_user_score
    if self.parent_id.nil? && !self.board.project.nil?
      UserScore.joint(:delete_message, self.author,nil,self, { message_id: self.id })
      update_memo_number(User.current,1)
      if self.board.project_id != -1
        update_memo_number(self.author,2,self.board.project)
      end
    elsif !self.parent_id.nil? && !self.board.project.nil?
      UserScore.joint(:reply_deleting, self.author,self.parent.author,self, { message_id: self.id })
      update_replay_for_memo(User.current,1)
      if self.board.project_id != -1
        update_replay_for_memo(self.author,2,self.board.project)
      end
    end
  end

  def send_mail
    # Mailer.run.message_posted(self) if Setting.notified_events.include?('message_posted')
  end

  # Time 2015-03-31 09:15:06
  # Author lizanle
  # Description 删除对应消息的图片资源
  def delete_kindeditor_assets
    delete_kindeditor_assets_from_disk self.id,OwnerTypeHelper::MESSAGE
  end

  # 课程成员得分（活跃度）
  def act_as_student_score
    if self.course
      if self.parent_id.nil?
        # 发帖
        course_member_score(self.course.id, self.author_id, "Message")
      else
        # 回帖
        course_member_score(self.course.id, self.author_id, "MessageReply")
      end
    end
  end

  # 删除帖子的时候更新课程帖子总数, 删除回复的时候减少总数
  def down_course_score
    if self.course
      if self.parent_id.nil?  # 发帖
        down_course_score_num(self.course.id, self.author_id, "Message")
      else
        # 回帖
        down_course_score_num(self.course.id, self.author_id, "MessageReply")
      end
    end
  end

  def delete_org_activities
    OrgActivity.where("org_act_type='Message' and org_act_id =#{self.id} and container_type='OrgSubfield'").destroy_all
  end
end