class TodoController < ApplicationController

  model :user
  model :project
  model :context

  helper :todo

  prepend_before_filter :login_required
  layout "standard"

  def index
    list
    render_action "list"
  end

  # Main method for listing tasks
  # Set page title, and fill variables with contexts and done and not-done tasks
  # Number of completed actions to show is determined by a setting in settings.yml
  #
  def list
    self.init
    @on_page = "home"
    @page_title = "TRACKS::List tasks"
    
    # If you've set no_completed to zero, the completed items box
    # isn't shown on the home page
    max_completed = @user.preferences["no_completed"].to_i-1
    @done = (max_completed > 0) ? @done[0..max_completed] : nil

    @contexts_to_show = @contexts.reject {|x| x.hide? }
    
    if @contexts.empty?
      flash['warning'] = 'You must add at least one context before adding next actions.'
    end

    # Set count badge to number of not-done, not hidden context items
    @count = @todos.reject { |x| x.done? || x.context.hide? }.size
    
    respond_to do |wants|
      wants.html
      wants.xml { render :action => 'list.rxml', :layout => false }
    end
  end

  # Is this used? Seems like it should be deleted. -lukemelia, 2006-07-16
  def update_element
  end
  
  # Called by a form button
  # Parameters from form fields are passed to create new action
  # in the selected context.
  def add_item
    self.init
    @item = @user.todos.build
    @item.attributes = params["todo"]
    @on_page = "home"

    perform_add_item('list')
  end
  
  # Adding deferred actions from form on todo/tickler
  #
  def add_deferred_item
    self.init
    @item = Deferred.create(params["todo"])
    @item.user_id = @user.id
    @on_page = "tickler"

    perform_add_item('tickler')
  end
  
  def edit_action
    self.init
    @item = check_user_return_item
    render :layout => false
  end
  
  def show
    self.init
    item = check_user_return_item
    respond_to do |wants|
       wants.xml { render :xml => item.to_xml( :root => 'todo', :except => :user_id ) }
     end
  end

  # Toggles the 'done' status of the action
  #
  def toggle_check
    self.init

    @item = check_user_return_item
    @item.toggle!('done')
    @item.completed = Time.now() # For some reason, the before_save in todo.rb stopped working
    @saved = @item.save
    @on_page = "home"
    if @saved
      @down_count = @todos.collect { |x| ( !x.done? and !x.context.hide? ) ? x:nil }.compact.size.to_s
    end
    return if request.xhr?

    if @saved
      flash['notice']  = "The action <strong>'#{@item.description}'</strong> was marked as <strong>#{@item.done? ? 'complete' : 'incomplete' }</strong>"
    else
      flash['notice']  = "The action <strong>'#{@item.description}'</strong> was NOT marked as <strong>#{@item.done? ? 'complete' : 'incomplete' } due to an error on the server.</strong>"
    end
    redirect_to :action => "list"
  end

  # Edit the details of an action
  #
  def update_action
    self.init
    if params["on_project_page"] == true
      @on_page = "project"
    end
    @item = check_user_return_item
    @original_item_context_id = @item.context_id
    @item.attributes = params["item"]

    if @item.due?
      @item.due = Date.strptime(params["item"]["due"], @user.preferences["date_format"])
    else
      @item.due = ""
    end

    @saved = @item.save
  end
  
  def deferred_update_action
    #self.init
    @tickle = check_user_return_item
    @original_item_context_id = @tickle.context_id
    @tickle.attributes = params["item"]

    if @tickle.due?
      @tickle.due = Date.strptime(params["item"]["due"], @user.preferences["date_format"])
    else
      @tickle.due = ""
    end

    @saved = @tickle.save
  end
  
  def update_context
    self.init
    @item = check_user_return_item
    context = Context.find(params['context_id']);
    if @user == context.user
      @original_item_context_id = @item.context_id
      @item.context_id = context.id
      @item.context = context
      @saved = @item.save
      render :action => 'update_action'
    else
      render :update do |page| 
        page.replace_html "info", content_tag("div", "Error updating the context of the dragged item. Item and context user mis-match: #{@item.user.name} and #{@context.user.name}! - refresh the page to see them.", "class" => "warning")
      end
    end
  end
  
  def update_project
    self.init
    @item = check_user_return_item
    project = Project.find(params['project_id']);
    if @user == project.user
      @original_item_context_id = @item.context_id
      @item.project_id = project.id
      @item.project = project
      @saved = @item.save
      render :action => 'update_action'
    else
      render :update do |page| 
        page.replace_html "info", content_tag("div", "Error updating the project of the dragged item. Item and project user mis-match: #{@item.user.name} and #{@project.user.name}! - refresh the page to see them.", "class" => "warning")
      end
    end
  end
  
  # Delete a next action
  #
  def destroy_action
    self.init
    @item = check_user_return_item
    
    @saved = @item.destroy
    @on_page = "home"
    if @saved
      self.init
      @down_count = @todos.reject { |x| x.done? or x.context.hide? }.size.to_s
    end
    
    return if request.xhr?
    
    # fallback for standard requests
    if @saved
      flash["notice"] = 'Successfully deleted next action'
      redirect_to :action => 'list'
    else
      render :action => 'list'
    end
    
    rescue
      if request.xhr? # be sure to include an error.rjs
        render :action => 'error'
      else
        flash["warning"] = 'An error occurred on the server.'
        render :action => 'list'
      end
  end

  # List the completed tasks, sorted by completion date
  # @done_today: in the last 24 hours
  # @done_this_week: in the last week
  # @done_this_month: in the last 4 weeks (<=28 days)
  def completed
    self.init
    @page_title = "TRACKS::Completed tasks"

    unless @done.nil?
      @done_today = @done.collect { |x| x.completed >= 1.day.ago ? x:nil }.compact
      @done_this_week = @done.collect { |x| 1.week.ago <= x.completed ? x:nil }.compact
      @done_this_month = @done.collect { |x| 4.week.ago <= x.completed ? x:nil }.compact
    end
  end

  # Archived completed items, older than 28 days
  #
  def completed_archive
    self.init
    @page_title = "TRACKS::Archived completed tasks"
    @done_archive = @done.collect { |x| 28.day.ago > x.completed ? x:nil }.compact
  end
  
  def feeds
    self.init
    @page_title = "TRACKS::Feeds"
  end
  
  def tickler
    self.init
    @page_title = "TRACKS::Tickler"
    @tickles = @user.todos.find(:all, :conditions => ['type = ?', "Deferred"], :order => "show_from ASC")
    @count = @tickles.size
    @on_page = "tickler"
  end

  # Called by periodically_call_remote
  # Check for any due tickler items, change them to type Immediate and show
  # on the page
  #
  def check_tickler
    self.init
    now = Date.today()
    @due_tickles = @user.todos.find(:all, :conditions => ['type = ? AND (show_from < ? OR show_from = ?)', "Deferred", now, now ], :order => "show_from ASC")
    unless @due_tickles.empty?
      # Change the due tickles to type "Immediate"
      @due_tickles.each do |t|
        t[:type] = "Immediate"
        t.show_from = nil
        t.save
      end
    end
  end
  
  protected

    def check_user_return_item
      item = Todo.find( params['id'] )
      if @user == item.user
        return item
      else
        flash["warning"] = "Item and session user mis-match: #{item.user.name} and #{@user.name}!"
        render_text ""
      end
    end

    def init
      @projects = @user.projects
      @contexts = @user.contexts
      init_todos
    end
    
    def init_todos
      @todos = Todo.find(:all, :conditions => ['user_id = ? and type = ?', @user.id, "Immediate"])
      @done = Todo.find(:all, :conditions => ['user_id = ? and done = ?', @user.id, true], :order => 'completed DESC')
    end
    
    def perform_add_item(redirect_action)

      if @item.due?
        @item.due = Date.strptime(params["todo"]["due"], @user.preferences["date_format"])
      else
        @item.due = ""
      end

      @saved = @item.save

       if @saved
         init_todos
         @up_count = @todos.reject { |x| x.done? or x.context.hide? }.size.to_s
       end

       respond_to do |wants|
         wants.html { redirect_to :action => redirect_action }
         wants.js
         wants.xml { render :xml => @item.to_xml( :root => 'todo', :except => :user_id ) }
       end

       # if you're seeing the message 'An error occurred on the server.' and you want to debug, comment out the rescue section and check the Ajax response for an exception message
       rescue
         respond_to do |wants|
           wants.html { render :action => redirect_action } # TODO: would prefer something like: flash["warning"] = 'An error occurred on the server.' render :action => 'list'
           wants.js { render :action => 'error' }
           wants.xml { render :text => 'An error occurred on the server.' + $! }
         end
    end
    
        
end