class UserController < ApplicationController
  layout 'site', :except => :api_details

  before_filter :authorize, :only => [:api_details, :api_gpx_files]
  before_filter :authorize_web, :except => [:api_details, :api_gpx_files]
  before_filter :set_locale, :except => [:api_details, :api_gpx_files]
  before_filter :require_user, :only => [:account, :go_public, :make_friend, :remove_friend]
  before_filter :check_database_readable, :except => [:api_details, :api_gpx_files]
  before_filter :check_database_writable, :only => [:login, :new, :account, :go_public, :make_friend, :remove_friend]
  before_filter :check_api_readable, :only => [:api_details, :api_gpx_files]
  before_filter :require_allow_read_prefs, :only => [:api_details]
  before_filter :require_allow_read_gpx, :only => [:api_gpx_files]
  before_filter :require_cookies, :only => [:login, :confirm]
  before_filter :require_administrator, :only => [:activate, :deactivate, :hide, :unhide, :delete]
  before_filter :lookup_this_user, :only => [:activate, :deactivate, :hide, :unhide, :delete]

  filter_parameter_logging :password, :pass_crypt, :pass_crypt_confirmation

  cache_sweeper :user_sweeper, :only => [:account, :hide, :unhide, :delete]

  def save
    @title = t 'user.new.title'

    if Acl.find_by_address(request.remote_ip, :conditions => {:k => "no_account_creation"})
      render :action => 'new'
    else
      @user = User.new(params[:user])

      @user.visible = true
      @user.data_public = true
      @user.description = "" if @user.description.nil?
      @user.creation_ip = request.remote_ip
      @user.languages = request.user_preferred_languages

      if @user.save
        flash[:notice] = t 'user.new.flash create success message'
        Notifier.deliver_signup_confirm(@user, @user.tokens.create(:referer => params[:referer]))
        redirect_to :action => 'login'
      else
        render :action => 'new'
      end
    end
  end

  def account
    @title = t 'user.account.title'
    @tokens = @user.oauth_tokens.find :all, :conditions => 'oauth_tokens.invalidated_at is null and oauth_tokens.authorized_at is not null'

    if params[:user] and params[:user][:display_name] and params[:user][:description]
      @user.display_name = params[:user][:display_name]
      @user.new_email = params[:user][:new_email]

      if params[:user][:pass_crypt].length > 0 or params[:user][:pass_crypt_confirmation].length > 0
        @user.pass_crypt = params[:user][:pass_crypt]
        @user.pass_crypt_confirmation = params[:user][:pass_crypt_confirmation]
      end

      @user.description = params[:user][:description]
      @user.languages = params[:user][:languages].split(",")

      case params[:image_action]
        when "new" then @user.image = params[:user][:image]
        when "delete" then @user.image = nil
      end

      @user.home_lat = params[:user][:home_lat]
      @user.home_lon = params[:user][:home_lon]

      if @user.save
        set_locale

        if @user.new_email.nil? or @user.new_email.empty?
          flash.now[:notice] = t 'user.account.flash update success'
        else
          flash.now[:notice] = t 'user.account.flash update success confirm needed'

          begin
            Notifier.deliver_email_confirm(@user, @user.tokens.create)
          rescue
            # Ignore errors sending email
          end
        end
      end
    else
      if flash[:errors]
        flash[:errors].each do |attr,msg|
          attr = "new_email" if attr == "email"
          @user.errors.add(attr,msg)
        end
      end
    end
  end

  def go_public
    @user.data_public = true
    @user.save
    flash[:notice] = t 'user.go_public.flash success'
    redirect_to :controller => 'user', :action => 'account', :display_name => @user.display_name
  end

  def lost_password
    @title = t 'user.lost_password.title'

    if params[:user] and params[:user][:email]
      user = User.find_by_email(params[:user][:email], :conditions => {:visible => true})

      if user
        token = user.tokens.create
        Notifier.deliver_lost_password(user, token)
        flash[:notice] = t 'user.lost_password.notice email on way'
        redirect_to :action => 'login'
      else
        flash.now[:error] = t 'user.lost_password.notice email cannot find'
      end
    end
  end

  def reset_password
    @title = t 'user.reset_password.title'

    if params[:token]
      token = UserToken.find_by_token(params[:token])

      if token
        @user = token.user

        if params[:user]
          @user.pass_crypt = params[:user][:pass_crypt]
          @user.pass_crypt_confirmation = params[:user][:pass_crypt_confirmation]
          @user.active = true
          @user.email_valid = true

          if @user.save
            token.destroy
            flash[:notice] = t 'user.reset_password.flash changed'
            redirect_to :action => 'login'
          end
        end
      else
        flash[:error] = t 'user.reset_password.flash token bad'
        redirect_to :action => 'lost_password'
      end
    end
  end

  def new
    @title = t 'user.new.title'

    # The user is logged in already, so don't show them the signup
    # page, instead send them to the home page
    redirect_to :controller => 'site', :action => 'index' if session[:user]
  end

  def login
    @title = t 'user.login.title'

    if params[:user]
      email_or_display_name = params[:user][:email]
      pass = params[:user][:password]
      user = User.authenticate(:username => email_or_display_name, :password => pass)

      if user
        session[:user] = user.id
        session_expires_after 1.month if params[:remember_me]

        # The user is logged in, if the referer param exists, redirect
        # them to that unless they've also got a block on them, in
        # which case redirect them to the block so they can clear it.
        if user.blocked_on_view
          redirect_to user.blocked_on_view, :referrer => params[:referrer]
        elsif params[:referer]
          redirect_to params[:referer]
        else
          redirect_to :controller => 'site', :action => 'index'
        end
       elsif User.authenticate(:username => email_or_display_name, :password => pass, :inactive => true)
        flash.now[:error] = t 'user.login.account not active'
      else
        flash.now[:error] = t 'user.login.auth failure'
      end
    end
  end

  def logout
    @title = t 'user.logout.title'

    if params[:session] == request.session_options[:id]
      if session[:token]
        token = UserToken.find_by_token(session[:token])
        if token
          token.destroy
        end
        session[:token] = nil
      end
      session[:user] = nil
      session_expires_automatically
      if params[:referer]
        redirect_to params[:referer]
      else
        redirect_to :controller => 'site', :action => 'index'
      end
    end
  end

  def confirm
    if params[:confirm_action]
      token = UserToken.find_by_token(params[:confirm_string])
      if token and !token.user.active?
        @user = token.user
        @user.active = true
        @user.email_valid = true
        @user.save!
        referer = token.referer
        token.destroy
        flash[:notice] = t 'user.confirm.success'
        session[:user] = @user.id
        unless referer.nil?
          redirect_to referer
        else
          redirect_to :action => 'account', :display_name => @user.display_name
        end
      else
        flash.now[:error] = t 'user.confirm.failure'
      end
    end
  end

  def confirm_email
    if params[:confirm_action]
      token = UserToken.find_by_token(params[:confirm_string])
      if token and token.user.new_email?
        @user = token.user
        @user.email = @user.new_email
        @user.new_email = nil
        @user.active = true
        @user.email_valid = true
        if @user.save
          flash[:notice] = t 'user.confirm_email.success'
        else
          flash[:errors] = @user.errors
        end
        token.destroy
        session[:user] = @user.id
        redirect_to :action => 'account', :display_name => @user.display_name
      else
        flash.now[:error] = t 'user.confirm_email.failure'
      end
    end
  end

  def api_gpx_files
    doc = OSM::API.new.get_xml_doc
    @user.traces.each do |trace|
      doc.root << trace.to_xml_node() if trace.public? or trace.user == @user
    end
    render :text => doc.to_s, :content_type => "text/xml"
  end

  def view
    @this_user = User.find_by_display_name(params[:display_name])

    if @this_user and
       (@this_user.visible? or (@user and @user.administrator?))
      @title = @this_user.display_name
    else
      @title = t 'user.no_such_user.title'
      @not_found_user = params[:display_name]
      render :action => 'no_such_user', :status => :not_found
    end
  end

  def make_friend
    if params[:display_name]
      name = params[:display_name]
      new_friend = User.find_by_display_name(name, :conditions => {:visible => true})
      friend = Friend.new
      friend.user_id = @user.id
      friend.friend_user_id = new_friend.id
      unless @user.is_friends_with?(new_friend)
        if friend.save
          flash[:notice] = t 'user.make_friend.success', :name => name
          Notifier.deliver_friend_notification(friend)
        else
          friend.add_error(t('user.make_friend.failed', :name => name))
        end
      else
        flash[:warning] = t 'user.make_friend.already_a_friend', :name => name
      end

      if params[:referer]
        redirect_to params[:referer]
      else
        redirect_to :controller => 'user', :action => 'view'
      end
    end
  end

  def remove_friend
    if params[:display_name]
      name = params[:display_name]
      friend = User.find_by_display_name(name, :conditions => {:visible => true})
      if @user.is_friends_with?(friend)
        Friend.delete_all "user_id = #{@user.id} AND friend_user_id = #{friend.id}"
        flash[:notice] = t 'user.remove_friend.success', :name => friend.display_name
      else
        flash[:error] = t 'user.remove_friend.not_a_friend', :name => friend.display_name
      end

      if params[:referer]
        redirect_to params[:referer]
      else
        redirect_to :controller => 'user', :action => 'view'
      end
    end
  end

  ##
  # activate a user, allowing them to log in
  def activate
    @this_user.update_attributes(:active => true)
    redirect_to :controller => 'user', :action => 'view', :display_name => params[:display_name]
  end

  ##
  # deactivate a user, preventing them from logging in
  def deactivate
    @this_user.update_attributes(:active => false)
    redirect_to :controller => 'user', :action => 'view', :display_name => params[:display_name]
  end

  ##
  # hide a user, marking them as logically deleted
  def hide
    @this_user.update_attributes(:visible => false)
    redirect_to :controller => 'user', :action => 'view', :display_name => params[:display_name]
  end

  ##
  # unhide a user, clearing the logically deleted flag
  def unhide
    @this_user.update_attributes(:visible => true)
    redirect_to :controller => 'user', :action => 'view', :display_name => params[:display_name]
  end

  ##
  # delete a user, marking them as deleted and removing personal data
  def delete
    @this_user.delete
    redirect_to :controller => 'user', :action => 'view', :display_name => params[:display_name]
  end
private
  ##
  # require that the user is a administrator, or fill out a helpful error message
  # and return them to the user page.
  def require_administrator
    unless @user.administrator?
      flash[:error] = t('user.filter.not_an_administrator')
      redirect_to :controller => 'user', :action => 'view', :display_name => params[:display_name]
    end
  end

  ##
  # ensure that there is a "this_user" instance variable
  def lookup_this_user
    @this_user = User.find_by_display_name(params[:display_name])
  rescue ActiveRecord::RecordNotFound
    redirect_to :controller => 'user', :action => 'view', :display_name => params[:display_name] unless @this_user
  end
end
