require 'differ'

# Event management life cycle
class ModerationsController < ApplicationController
  before_action :authenticate_user!
  before_action :set_moderation, :set_mailer_host, only:
    [:show, :edit, :preview, :update, :validate, :accept, :refuse, :destroy]

  def index
    @events = Event.unmoderated
  end

  def preview
    @moderation.attributes = moderation_params
    @moderation.valid?
    render action: :edit
  end

  # PATCH/PUT /moderations/1
  # PATCH/PUT /moderations/1.json
  def update
    @older_mod = Event.new @event.attributes
    respond_to do |format|
      if @moderation.update(moderation_params) && send_moderation_mails
        format.html { redirect_to moderations_path, notice: t('.ok') }
        format.json { head :no_content }
      else
        format.html { render action: 'edit' }
        # 422 means :unprocessable_entity
        format.json { render json: @moderation.errors, status: 422 }
      end
    end
  end

  # PATCH/PUT /accept/1
  # PATCH/PUT /accept/1.json
  def accept
    respond_to do |format|
      if @moderation.update(moderated: true) && send_accept_mails
        format.html { redirect_to moderations_path, notice: t('.ok') }
        format.json { head :no_content }
      else
        format.html { render action: 'edit' }
        # 422 means :unprocessable_entity
        format.json { render json: @moderation.errors, status: 422 }
      end
    end
  end

  # DELETE /events/1
  # DELETE /events/1.json
  def destroy
    if @moderation.destroy && send_destroy_mails
      EventMailer.destroy(@moderation, current_user, @reason).deliver
      ModerationMailer.destroy(@moderation, current_user, @reason).deliver
    end
    respond_to do |format|
      format.html { redirect_to moderations_url, notice: t('.ok') }
      format.json { head :no_content }
    end
  end

  private

  # Use callbacks to share common setup or constraints between actions.
  def set_moderation
    @event = Event.find params[:id]
    @moderation = @event
  end

  # Never trust parameters from the scary internet, only allow the white list
  # through.
  def moderation_params
    params.require(:event)
      .permit :title, :start_time, :end_time, :description, :address, :city,
              :region, :locality, :url, :contact, :submitter, :tags
  end

  # Useful to manage absolute url in mails
  def set_mailer_host
    ActionMailer::Base.default_url_options[:host] = request.host_with_port
  end

  def send_moderation_mails
    # Send an update mail to moderators
    ModerationMailer.update(@older_mod, @moderation, current_user).deliver
  end

  def send_accept_mails
    # Send an acceptation mail to its author
    EventMailer.accept(@moderation, current_user).deliver

    # Send an acceptation mail to moderators
    ModerationMailer.accept(@moderation, current_user).deliver
  end

  def send_destroy_mails
    # Send a notification to its author
    if params[:reason] == 'r_4'
      @reason = params[:reason_text]
    else
      @reason = t "moderations.refuse.reason_#{params[:reason]}_long"
    end
  end
end