# Copyright (C) 2012-2013 Zammad Foundation, http://zammad-foundation.org/

require 'overview'

class Ticket::Overview

=begin

all overview by user

  result = Ticket::Overview.all(
    :current_user => User.find(123),
  )

returns

  result = [overview1, overview2]

=end

  def self.all (data)

    # get customer overviews
    if data[:current_user].is_role('Customer')
      role = data[:current_user].is_role( 'Customer' )
      if data[:current_user].organization_id && data[:current_user].organization.shared
        overviews = Overview.where( :role_id => role.id, :active => true )
      else
        overviews = Overview.where( :role_id => role.id, :organization_shared => false, :active => true )
      end
      return overviews
    end

    # get agent overviews
    role = data[:current_user].is_role( 'Agent' )
    overviews = Overview.where( :role_id => role.id, :active => true )
    return overviews
  end

=begin

selected overview by user

  result = Ticket::Overview.list(
    :current_user => User.find(123),
    :view         => 'some_view_url',
  )

returns

  result = {
    :tickets       => tickets,                # [ticket1, ticket2, ticket3]
    :tickets_count => tickets_count,          # count of tickets
    :overview      => overview_selected_raw,  # overview attributes
  }

=end

  def self.list (data)

    overviews = self.all(data)

    # build up attributes hash
    overview_selected     = nil
    overview_selected_raw = nil

    overviews.each { |overview|

      # remember selected view
      if data[:view] && data[:view] == overview.link
        overview_selected     = overview
        overview_selected_raw = Marshal.load( Marshal.dump(overview.attributes) )
      end

      # replace e.g. 'current_user.id' with current_user.id
      overview.condition.each { |item, value |
        if value && value.class.to_s == 'String'
          parts = value.split( '.', 2 )
          if parts[0] && parts[1] && parts[0] == 'current_user'
            overview.condition[item] = data[:current_user][parts[1].to_sym]
          end
        end
      }
    }

    if data[:view] && !overview_selected
      raise "No such view '#{ data[:view] }'"
    end

    # sortby
    # prio
    # state
    # group
    # customer

    # order
    # asc
    # desc

    # groupby
    # prio
    # state
    # group
    # customer

    #    all = attributes[:myopenassigned]
    #    all.merge( { :group_id => groups } )

    #    @tickets = Ticket.where(:group_id => groups, attributes[:myopenassigned] ).limit(params[:limit])
    # get only tickets with permissions
    if data[:current_user].is_role('Customer')
      group_ids = Group.select( 'groups.id' ).
      where( 'groups.active = ?', true ).
      map( &:id )
    else
      group_ids = Group.select( 'groups.id' ).joins(:users).
      where( 'groups_users.user_id = ?', [ data[:current_user].id ] ).
      where( 'groups.active = ?', true ).
      map( &:id )
    end

    # overview meta for navbar
    if !overview_selected

      # loop each overview
      result = []
      overviews.each { |overview|

        # get count
        count = Ticket.where( :group_id => group_ids ).where( _condition( overview.condition ) ).count()

        # get meta info
        all = {
          :name => overview.name,
          :prio => overview.prio,
          :link => overview.link,
        }

        # push to result data
        result.push all.merge( { :count => count } )
      }
      return result
    end

    # get result list
    if data[:array]
      order_by = overview_selected[:order][:by].to_s + ' ' + overview_selected[:order][:direction].to_s
      if overview_selected.group_by && !overview_selected.group_by.empty?
        order_by = overview_selected.group_by + '_id, ' + order_by
      end
      tickets = Ticket.select( 'id' ).
      where( :group_id => group_ids ).
      where( _condition( overview_selected.condition ) ).
      order( order_by ).
      limit( 500 )

      ticket_ids = []
      tickets.each { |ticket|
        ticket_ids.push ticket.id
      }

      tickets_count = Ticket.where( :group_id => group_ids ).
      where( _condition( overview_selected.condition ) ).
      count()

      return {
        :ticket_ids    => ticket_ids,
        :tickets_count => tickets_count,
        :overview      => overview_selected_raw,
      }
    end

    # get tickets for overview
    data[:start_page] ||= 1
    tickets = Ticket.where( :group_id => group_ids ).
    where( _condition( overview_selected.condition ) ).
    order( overview_selected[:order][:by].to_s + ' ' + overview_selected[:order][:direction].to_s )#.
    #      limit( overview_selected.view[ data[:view_mode].to_sym ][:per_page] ).
    #      offset( overview_selected.view[ data[:view_mode].to_sym ][:per_page].to_i * ( data[:start_page].to_i - 1 ) )

    tickets_count = Ticket.where( :group_id => group_ids ).
    where( _condition( overview_selected.condition ) ).
    count()

    return {
      :tickets       => tickets,
      :tickets_count => tickets_count,
      :overview      => overview_selected_raw,
    }

  end

  private
    def self._condition(condition)
      sql  = ''
      bind = [nil]
      condition.each {|key, value|
        if sql != ''
          sql += ' AND '
        end
        if value.class == Array
          sql += " #{key} IN (?)"
          bind.push value
        elsif value.class == Hash || value.class == ActiveSupport::HashWithIndifferentAccess
          time = Time.now
          if value['area'] == 'minute'
            if value['direction'] == 'last'
              time -= value['count'].to_i * 60
            else
              time += value['count'].to_i * 60
            end
          elsif value['area'] == 'hour'
            if value['direction'] == 'last'
              time -= value['count'].to_i * 60 * 60
            else
              time += value['count'].to_i * 60 * 60
            end
          elsif value['area'] == 'day'
            if value['direction'] == 'last'
              time -= value['count'].to_i * 60 * 60 * 24
            else
              time += value['count'].to_i * 60 * 60 * 24
            end
          elsif value['area'] == 'month'
            if value['direction'] == 'last'
              time -= value['count'].to_i * 60 * 60 * 24 * 31
            else
              time += value['count'].to_i * 60 * 60 * 24 * 31
            end
          elsif value['area'] == 'year'
            if value['direction'] == 'last'
              time -= value['count'].to_i * 60 * 60 * 24 * 365
            else
              time += value['count'].to_i * 60 * 60 * 24 * 365
            end
          end
          if value['direction'] == 'last'
            sql += " #{key} > ?"
            bind.push time
          else
            sql += " #{key} < ?"
            bind.push time
          end
        else
          sql += " #{key} = ?"
          bind.push value
        end
      }
      bind[0] = sql
      return bind
    end

end