class Mission < ActiveRecord::Base
  
  extend FriendlyId
  friendly_id :title, use: :slugged
  validates_presence_of :title, :slug
  
  belongs_to :owner, :class_name => "User"
  has_many :mission_agents, :dependent => :destroy
  has_many :agent_steps, :through => :mission_agents
  accepts_nested_attributes_for :mission_agents, allow_destroy:true
  
  mount_uploader :cover_img, MissionCoverUploader
  process_in_background :cover_img
  
  after_initialize do |user|
      check_for_completion
  end
  
  def agent_count
     return self.mission_agents.count
  end
  
  def confirmed_agent_count
    confirmed_agents = 0
    self.mission_agents.each do |agent|
      if agent.user != nil
        confirmed_agents = confirmed_agents + 1
      end
    end
    return confirmed_agents
  end
  
  def agent_count_stats
    return String.new("#{self.confirmed_agent_count}/#{self.agent_count}")
  end
  
  def step_count
    total_steps = 0
    self.mission_agents.each do |agent|
      total_steps = total_steps + agent.agent_steps.count
    end
    return total_steps
  end
  
  def completed_steps_count
    completed_steps = 0
    self.mission_agents.each do |agent|
      agent.agent_steps.each do |step|
        if step.completed
          completed_steps = completed_steps + 1
        end
      end
    end
    return completed_steps
  end
  
  def step_count_stats
    return String.new("#{self.completed_steps_count}/#{self.step_count}")
  end
  
  def percentage_completed
    steps_mod  = 0.8
    agents_mod = 0.3
    completed  = (completed_steps_count * steps_mod) + (confirmed_agent_count * agents_mod)
    total      = (step_count * steps_mod) + (agent_count * agents_mod)
    if total > 0
      percentage = (100/total) * completed
    else
      if self.status == 3
        percentage = 100
      else
        percentage = 0
      end
    end
    return percentage
  end
  
  def is_agent(user)
    if user
      if self.mission_agents.find_all_by_user_id(user.id).count > 0
        return true
      end
    end
    return false
  end

  def all_steps_completed
    if self.step_count > 0 
      self.mission_agents.each do |agent|
        agent.agent_steps.each do |step|
          if step.completed == false || step.completed == nil
            return false
          end
        end
      end
      return true
    else
      return false
    end
  end
  
  def check_for_completion
    if self.status == 1 || self.status == 2
      if seconds_left > 0
        if self.all_steps_completed
          self.completed
        end
      else
        self.failed
      end
    end
  end
  
  def completed
    self.update(status: 3)
  end
  
  def failed
    self.update(status: 4)
  end
  
  def days_left
    if self.status == 3 || self.status == 4
      return '0'
    elsif self.status == 1 && self.end_date == nil
      return '?'
    elsif self.end_date
      time_dif = self.end_date - Time.now
      days_left = time_dif / 60 / 60 / 24
      return days_left.round.to_s
    else
      return '&infin;'
    end
  end
  
  def seconds_left
    if self.end_date
      seconds_left = self.end_date - Time.now
      return seconds_left
    else
      return 0
    end
  end
  
end