class MessagesController < ApplicationController

  include WithinOrganization

  before_action { @server = organization.servers.present.find_by_permalink!(params[:server_id]) }
  before_action { params[:id] && @message = @server.message_db.message(params[:id].to_i) }

  def new
    if params[:direction] == 'incoming'
      @message = IncomingMessagePrototype.new(@server, request.ip, 'web-ui', {})
      @message.from = session[:test_in_from] || current_user.email_tag
      @message.to = @server.routes.order(:name).first&.description
    else
      @message = OutgoingMessagePrototype.new(@server, request.ip, 'web-ui', {})
      @message.to = session[:test_out_to] || current_user.email_address
      if domain = @server.domains.verified.order(:name).first
        @message.from = "test@#{domain.name}"
      end
    end
    @message.subject = "Test Message at #{Time.zone.now.to_s(:long)}"
    @message.plain_body = "This is a message to test the delivery of messages through Postal."
  end

  def create
    if params[:direction] == 'incoming'
      session[:test_in_from] = params[:message][:from] if params[:message]
      @message = IncomingMessagePrototype.new(@server, request.ip, 'web-ui', params[:message])
      @message.attachments = [{:name => "test.txt", :content_type => "text/plain", :data => "Hello world!"}]
    else
      session[:test_out_to] = params[:message][:to] if params[:message]
      @message = OutgoingMessagePrototype.new(@server, request.ip, 'web-ui', params[:message])
    end
    if result = @message.create_messages
      if result.size == 1
        redirect_to_with_json organization_server_message_path(organization, @server, result.first.last[:id]), :notice => "Message was queued successfully"
      else
        redirect_to_with_json [:queue, organization, @server], :notice => "Messages queued successfully "
      end
    else
      respond_to do |wants|
        wants.html do
          flash.now[:alert] = "Your message could not be sent. Ensure that all fields are completed fully. #{result.errors.inspect}"
          render 'new'
        end
        wants.json do
          render :json => {:flash => {:alert => "Your message could not be sent. Please check all field are completed fully."}}
        end
      end

    end
  end

  def outgoing
    @searchable = true
    get_messages('outgoing')
    respond_to do |wants|
      wants.html
      wants.json { render :json => {
        :flash => flash.each_with_object({}) { |(type, message), hash| hash[type] = message},
        :region_html => render_to_string(:partial => 'index', :formats => [:html])
      }}
    end
  end

  def incoming
    @searchable = true
    get_messages('incoming')
    respond_to do |wants|
      wants.html
      wants.json { render :json => {
        :flash => flash.each_with_object({}) { |(type, message), hash| hash[type] = message},
        :region_html => render_to_string(:partial => 'index', :formats => [:html])
      }}
    end
  end

  def held
    get_messages('held')
  end

  def deliveries
    render :json => {:html => render_to_string(:partial => 'deliveries', :locals => {:message => @message})}
  end

  def html_raw
    render :html => @message.html_body_without_tracking_image.html_safe
  end

  def spam_checks
    @spam_checks = @message.spam_checks.sort_by { |s| s['score']}.reverse
  end

  def attachment
    if @message.attachments.size > params[:attachment].to_i
      attachment = @message.attachments[params[:attachment].to_i]
      send_data attachment.body, :content_type => attachment.mime_type, :disposition => 'download', :filename => attachment.filename
    else
      redirect_to attachments_organization_server_message_path(organization, @server, @message.id), :alert => "Attachment not found. Choose an attachment from the list below."
    end
  end

  def download
    if @message.raw_message
      send_data @message.raw_message, :filename => "Message-#{organization.permalink}-#{@server.permalink}-#{@message.id}.eml", :content_type => "text/plain"
    else
      redirect_to organization_server_message_path(organization, @server, @message.id), :alert => "We no longer have the raw message stored for this message."
    end
  end

  def retry
    if @message.raw_message?
      if @message.queued_message
        @message.queued_message.queue!
        flash[:notice] = "This message will be retried shortly."
      elsif @message.held?
        @message.add_to_message_queue(:manual => true)
        flash[:notice] = "This message has been released. Delivery will be attempted shortly."
      else
        @message.add_to_message_queue(:manual => true)
        flash[:notice] = "This message will be redelivered shortly."
      end
    else
      flash[:alert] = "This message is no longer available."
    end
    redirect_to_with_json organization_server_message_path(organization, @server, @message.id)
  end

  def cancel_hold
    @message.cancel_hold
    redirect_to_with_json organization_server_message_path(organization, @server, @message.id)
  end

  def remove_from_queue
    if @message.queued_message && !@message.queued_message.locked?
      @message.queued_message.destroy
    end
    redirect_to_with_json organization_server_message_path(organization, @server, @message.id)
  end

  def suppressions
    @suppressions = @server.message_db.suppression_list.all_with_pagination(params[:page])
  end

  def activity
    @entries = @message.activity_entries
  end

  private

  def get_messages(scope)
    if scope == 'held'
      options = {:where => {:held => 1}}
    else
      options = {:where => {:scope => scope, :spam => false}, :order => :timestamp, :direction => 'desc'}

      if @query = (params[:query] || session["msg_query_#{@server.id}_#{scope}"]).presence
        session["msg_query_#{@server.id}_#{scope}"] = @query
        qs = Postal::QueryString.new(@query)
        if qs.empty?
          flash.now[:alert] = "It doesn't appear you entered anything to filter on. Please double check your query."
        else
          @queried = true
          if qs[:order] == 'oldest-first'
            options[:direction] = 'asc'
          end

          options[:where][:rcpt_to] = qs[:to] if qs[:to]
          options[:where][:mail_from] = qs[:from] if qs[:from]
          options[:where][:status] = qs[:status] if qs[:status]
          options[:where][:token] = qs[:token] if qs[:token]

          if qs[:msgid]
            options[:where][:message_id] = qs[:msgid]
            options[:where].delete(:spam)
            options[:where].delete(:scope)
          end
          options[:where][:tag] = qs[:tag] if qs[:tag]
          options[:where][:id] = qs[:id] if qs[:id]
          options[:where][:spam] = true if qs[:spam] == 'yes' || qs[:spam] == 'y'
          if qs[:before] || qs[:after]
            options[:where][:timestamp] = {}
            if qs[:before]
              begin
                options[:where][:timestamp][:less_than] = get_time_from_string(qs[:before]).to_f
              rescue TimeUndetermined => e
                flash.now[:alert] = "Couldn't determine time for before from '#{qs[:before]}'"
              end
            end

            if qs[:after]
              begin
                options[:where][:timestamp][:greater_than] = get_time_from_string(qs[:after]).to_f
              rescue TimeUndetermined => e
                flash.now[:alert] = "Couldn't determine time for after from '#{qs[:after]}'"
              end
            end
          end
        end
      else
        session["msg_query_#{@server.id}_#{scope}"] = nil
      end
    end

    @messages = @server.message_db.messages_with_pagination(params[:page], options)
  end

  class TimeUndetermined < Postal::Error; end

  def get_time_from_string(string)
    begin
      if string =~ /\A(\d{2,4})\-(\d{2})\-(\d{2}) (\d{2})\:(\d{2})\z/
        time = Time.new($1.to_i, $2.to_i, $3.to_i, $4.to_i, $5.to_i)
      elsif string =~ /\A(\d{2,4})\-(\d{2})\-(\d{2})\z/
        time = Time.new($1.to_i, $2.to_i, $3.to_i, 0)
      else
        time = Chronic.parse(string, :context => :past)
      end
    rescue
    end

    if time.nil?
      raise TimeUndetermined, "Couldn't determine a suitable time from '#{string}'"
    else
      time
    end
  end

end