require 'cdfmail'
require 'net/smtp'
require 'net/imap'
require 'mail2screen'
require 'ezcrypto'

class WebmailController < ApplicationController
  include ImapUtils
  
  # Administrative functions
  before_filter :login_required
  
  before_filter :obtain_cookies_for_search_and_nav, :only=>[:messages]
  
  layout "public", :except => [:view_source, :download]
  
  before_filter :load_imap_session
  
  after_filter :close_imap_session
  
#   model :filter, :expression, :mail_pref, :customer
  
  BOOL_ON = "on"
  
  def index
    redirect_to(:action=>"messages")
  end
  
  def error_connection
  end
  
  def refresh
    @mailbox.reload
    @folders = @mailbox.folders
    redirect_to(:action=>'messages')
  end
  
  def messages
    session["return_to"] = nil
    @search_field = params['search_field']
    @search_value = params['search_value']
    
    # handle sorting - tsort session field contains last reverse or no for field
    # and lsort - last sort field
    if session['tsort'].nil? or session['lsort'].nil?
      session['lsort'] = "DATE"
      session['tsort'] = {"DATE" => true, "FROM" => true, "SUBJECT" => true, "TO" => false}
    end
    
    case operation_param
    when t(:copy) # copy
      msg_ids = []
      messages_param.each { |msg_id, bool| 
        msg_ids << msg_id.to_i if bool == BOOL_ON and dst_folder != @folder_name }  if messages_param
      folder.copy_multiple(msg_ids, dst_folder) if msg_ids.size > 0 
    when t(:move) # move
      msg_ids = []
      messages_param.each { |msg_id, bool| 
        msg_ids << msg_id.to_i if bool == BOOL_ON and dst_folder != @folder_name } if messages_param
      folder.move_multiple(msg_ids, dst_folder) if msg_ids.size > 0 
    when t(:delete) # delete
      msg_ids = []
      messages_param.each { |msg_id, bool| msg_ids << msg_id.to_i if bool == BOOL_ON } if messages_param
      folder.delete_multiple(msg_ids) if msg_ids.size > 0
    when t(:mark_read) # mark as read
      messages_param.each { |msg_id, bool| msg = folder.mark_read(msg_id.to_i) if bool == BOOL_ON }  if messages_param
    when t(:mark_unread) # mark as unread
      messages_param.each { |msg_id, bool| msg = folder.mark_unread(msg_id.to_i) if bool == BOOL_ON }  if messages_param
    when "SORT"
      session['lsort'] = sort_query = params["scc"]
      session['tsort'][sort_query] = (session['tsort'][sort_query]? false : true)
      @search_field, @search_value = session['search_field'], session['search_value']
    when _('Search') # search  
      session['search_field'] = @search_field
      session['search_value'] = @search_value
    when _('Show all') # search  
      session['search_field'] = @search_field = nil
      session['search_value'] = @search_value = nil
    else
      # get search criteria from session
      @search_field = session['search_field']
      @search_value = session['search_value']
    end
    
    sort_query = session['lsort']
    reverse_sort = session['tsort'][sort_query]
    query = ["ALL"]
    @page = params["page"]
    @page ||= session['page']
    session['page'] = @page
    if @search_field and @search_value and not(@search_field.strip() == "") and not(@search_value.strip() == "")
      @pages = Paginator.new self, 0, get_mail_prefs.wm_rows, @page
      @messages = folder.messages_search([@search_field, @search_value], sort_query + (reverse_sort ? ' desc' : ' asc'))
    else
      @pages = Paginator.new self, folder.total, get_mail_prefs.wm_rows, @page
      @messages = folder.messages(@pages.current.first_item - 1, get_mail_prefs.wm_rows, sort_query + (reverse_sort ? ' desc' : ' asc'))
    end
    
  end
  
  def delete
    @msg_id = msg_id_param.to_i
    folder.delete(@msg_id)
    redirect_to(:action=>"messages")
  end
  
  def reply # not ready at all
    @msg_id = msg_id_param.to_i
    @imapmail = folder.message(@msg_id)
    fb = @imapmail.full_body
    @tmail = TMail::Mail.parse(fb) 
    
    @mail = prepare_mail
    @mail.reply(@tmail, fb, get_mail_prefs.mail_type)
    
    render :action => 'compose'
  end
  
  def forward
    @msg_id = msg_id_param.to_i
    @imapmail = folder.message(@msg_id)
    fb = @imapmail.full_body
    @tmail = TMail::Mail.parse(fb) 
    
    @mail = prepare_mail
    @mail.forward(@tmail, fb)
    
    render :action => 'compose'
  end
  
  def compose
    if @mail.nil?
      operation = operation_param
      if operation == _('Send')
        @mail = create_mail
        encmail = @mail.send_mail
        get_imap_session
        @mailbox.message_sent(encmail)
        
        # delete temporary files (attachments)
        @mail.delete_attachments()
        render :action => "webmail/mailsent"
      elsif operation == _('Add')
        @mail = create_mail
        attachment = CDF::Attachment.new(@mail)
        attachment.file = params['attachment']
      else
        # default - new email create
        @mail = create_mail
      end
    end
  end
  
  def empty # empty trash folder (works for any one else :-))
    folder.messages(0, -1).each{ |message|
      folder.delete(message)
    }
    folder.expunge
    redirect_to(:action=>"messages")
  end
  
  def message
    @msg_id = msg_id_param
    @imapmail = folder.message(@msg_id)
    folder.mark_read(@imapmail.uid) if @imapmail.unread
    @mail = TMail::Mail.parse(@imapmail.full_body)
  end
  
  def download
    msg_id = msg_id_param
    imapmail = folder.message(msg_id)
    mail = TMail::Mail.parse(imapmail.full_body) 
    
    if mail.multipart?
      get_parts(mail).each { |part|  
        return send_part(part) if part.header and part.header['content-type']['name'] == params['ctype'] 
      }
      render("webmail/webmail/noattachment")
    else  
      render("webmail/webmail/noattachment")
    end  
  end
  
  def prefs
    @customer = Customer.find(logged_customer)
    @mailpref = MailPref.find_or_create_by_customer_id logged_customer
    
    if params['op'] == _('Save')
      if params['customer']
        @customer.fname = params['customer']['fname']
        @customer.lname = params['customer']['lname']
        @customer.save
      end
      @mailpref.attributes = params["mailpref"]      
      @mailpref.save
      session["wmimapseskey"] = nil
      redirect_to(:action=>"messages")
    end
  end
  
  # Message filters management
  def filters
  end
  
  def filter
    if params['op']
      @filter = Filter.new(params['filter'])
      @filter.customer_id = logged_customer
      params['expression'].each { |index, expr| @filter.expressions << Expression.new(expr) unless expr["expr_value"].nil? or expr["expr_value"].strip == ""  }
      case params['op']
      when _('Add')
        @filter.expressions << Expression.new
      when _('Save')  
        if params['filter']['id'] and params['filter']['id'] != ""
          @sf = Filter.find(params['filter']['id'])
          @sf.name, @sf.destination_folder = @filter.name, @filter.destination_folder
          @sf.expressions.each{|expr| Expression.delete(expr.id) }
          @filter.expressions.each {|expr| @sf.expressions << Expression.create(expr.attributes) }
        else
          @sf = Filter.create(@filter.attributes)
          @sf.order_num = @user.filters.size
          @filter.expressions.each {|expr| @sf.expressions << Expression.create(expr.attributes) }
        end
        # may be some validation will be needed
        @sf.save
        @user.serialize_to_file
        return redirect_to(:action=>"filters")
      end
      @expressions = @filter.expressions
    else
      @filter = Filter.find(params["id"]) if params["id"]
      @expressions = @filter.expressions  
    end
    @destfolders = get_to_folders
  end
  
  def filter_delete
    Filter.delete(params["id"])
    # reindex other filters
    @user = Customer.find(logged_customer)
    findex = 0
    @user.filters.each { |filter|
      findex = findex + 1
      filter.order_num = findex
      filter.save
    }
    @user.serialize_to_file
    redirect_to :action=>"filters"
  end
  
  def filter_up
    filt = @user.filters.find(params['id'])
    ufilt = @user.filters.find_all("order_num = #{filt.order_num - 1}").first
    ufilt.order_num = ufilt.order_num + 1
    filt.order_num = filt.order_num - 1
    ufilt.save
    filt.save
    @user.serialize_to_file
    redirect_to :action=>"filters"
  end
  
  def filter_down
    filt = Filter.find(params["id"])
    dfilt = @user.filters[filt.order_num]
    dfilt.order_num = dfilt.order_num - 1
    filt.order_num = filt.order_num + 1
    dfilt.save
    filt.save
    @user.serialize_to_file
    redirect_to :action=>"filters"
  end
  
  def filter_add
    @filter = Filter.new
    @filter.expressions << Expression.new
    @expressions = @filter.expressions
    @destfolders = get_to_folders
    render_action("filter")
  end
  # end of filters
  
  def view_source
    @msg_id = msg_id_param.to_i
    @imapmail = folder.message(@msg_id)
    @msg_source = CGI.escapeHTML(@imapmail.full_body).gsub("\n", "<br/>")
  end
  
  def auto_complete_for_mail_to
    auto_complete_responder_for_contacts params[:mail][:to]
  end
  
  def auto_complete_for_mail_cc
    auto_complete_responder_for_contacts params[:mail][:cc]
  end
  
  def auto_complete_for_mail_bcc
    auto_complete_responder_for_contacts params[:mail][:bcc]
  end
  
  private
  
  def auto_complete_responder_for_contacts(value)
    # first split by "," and take last name
    searchName = value.split(',').last.strip
    
    # if there are 2 names search by them
    if searchName.split.size > 1
      fname, lname = searchName.split.first, searchName.split.last
      conditions = ['customer_id = ? and LOWER(fname) LIKE ? and LOWER(lname) like ?', logged_customer, fname.downcase + '%', lname.downcase + '%']
    else
      conditions = ['customer_id = ? and LOWER(fname) LIKE ?', logged_customer, searchName.downcase + '%']
    end  
    @contacts = Contact.find(:all, :conditions => conditions, :order => 'fname ASC',:limit => 8)
    render :partial => 'contacts'
  end
  
  protected
  
  def additional_scripts()
    '<link rel="stylesheet" href="/stylesheets/webmail/webmail.css" type="text/css" media="screen" />'<<
    '<script type="text/javascript" src="/javascripts/webmail.js"></script>'
  end
  
  private
  
  def get_to_folders
    res = Array.new
    @folders.each{|f| res << f unless f.name == CDF::CONFIG[:mail_sent] or f.name == CDF::CONFIG[:mail_inbox] }
    res
  end
  
  
  def create_mail
    m = CDF::Mail.new(user.mail_temporary_path)
    if params["mail"]
      ma = params["mail"]
      m.body, m.content_type, m.from, m.to, m.cc, m.bcc, m.subject =  ma["body"], ma["content_type"], ma["from"], ma["to"], ma["cc"], ma["bcc"], ma["subject"]
      if params["att_files"]
        att_files, att_tfiles, att_ctypes = params["att_files"], params["att_tfiles"], params["att_ctypes"]
        att_files.each {|i, value|
          att = CDF::Attachment.new(m)
          att.filename, att.temp_filename, att.content_type = value, att_tfiles[i], att_ctypes[i]
        }
      end
    else
      m.from, m.content_type = user.friendlly_local_email, get_mail_prefs.mail_type
    end 
    m.customer_id = logged_customer
    m
  end
  
  def prepare_mail
    m = CDF::Mail.new(user.mail_temporary_path)
    m.from, m.content_type = user.friendlly_local_email, get_mail_prefs.mail_type
    m
  end
  
  
  def send_part(part)
    if part.content_type == "text/html"
      disposition = "inline"
    elsif part.content_type.include?("image/")
      disposition = "inline"          
    else  
      disposition = "attachment"
    end
    headers['Content-Length'] = part.body.size
    response.headers['Accept-Ranges'] = 'bytes'
    headers['Content-type'] = part.content_type.strip
    headers['Content-Disposition'] = disposition << %(; filename="#{part.header['content-type']['name']}")
    render :text => part.body
  end
  
  def get_parts(mail)
    parts = Array.new
    parts << mail
    mail.parts.each { |part| 
      if part.multipart?
        parts = parts.concat(get_parts(part)) 
      elsif part.content_type and part.content_type.include?("rfc822")
        parts = parts.concat(get_parts(TMail::Mail.parse(part.body))) << part
      else 
        parts << part
      end
    }  
    parts 
  end
  
  def obtain_cookies_for_search_and_nav
    @srch_class = ((cookies['_wmlms'] and cookies['_wmlms'] == 'closed') ? 'closed' : 'open')
    @srch_img_src = ((cookies['_wmlms'] and cookies['_wmlms'] == 'closed') ? 'closed' : 'opened') 
    @ops_class = ((cookies['_wmlmo'] and cookies['_wmlmo'] == 'closed') ? 'closed' : 'open')
    @ops_img_src = ((cookies['_wmlmo'] and cookies['_wmlmo'] == 'closed') ? 'closed' : 'opened')     
  end  
  
  ###################################################################
  ### Some fixed parameters and session variables
  ###################################################################
  def folder
    @folders[@folder_name]
  end
  
  def msg_id_param
    params["msg_id"]
  end
  
  def messages_param
    params["messages"]
  end
  
  def dst_folder
    params["cpdest"]
  end
  
  def operation_param
    params["op"]
  end
end