# Redmine - project management software
# Copyright (C) 2006-2010  Jean-Philippe Lang
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

class TimelogController < ApplicationController
  menu_item :issues
  before_filter :find_project, :only => [:new, :create]
  before_filter :find_time_entry, :only => [:show, :edit, :update, :destroy]
  before_filter :authorize, :except => [:index]
  before_filter :find_optional_project, :only => [:index]
  accept_key_auth :index, :show, :create, :update, :destroy
  
  helper :sort
  include SortHelper
  helper :issues
  include TimelogHelper
  helper :custom_fields
  include CustomFieldsHelper
  
  def index
    sort_init 'spent_on', 'desc'
    sort_update 'spent_on' => 'spent_on',
                'user' => 'user_id',
                'activity' => 'activity_id',
                'project' => "#{Project.table_name}.name",
                'issue' => 'issue_id',
                'hours' => 'hours'
    
    cond = ARCondition.new
    if @project.nil?
      cond << Project.allowed_to_condition(User.current, :view_time_entries)
    elsif @issue.nil?
      cond << @project.project_condition(Setting.display_subprojects_issues?)
    else
      cond << "#{Issue.table_name}.root_id = #{@issue.root_id} AND #{Issue.table_name}.lft >= #{@issue.lft} AND #{Issue.table_name}.rgt <= #{@issue.rgt}"
    end
    
    retrieve_date_range
    cond << ['spent_on BETWEEN ? AND ?', @from, @to]

    TimeEntry.visible_by(User.current) do
      respond_to do |format|
        format.html {
          # Paginate results
          @entry_count = TimeEntry.count(:include => [:project, :issue], :conditions => cond.conditions)
          @entry_pages = Paginator.new self, @entry_count, per_page_option, params['page']
          @entries = TimeEntry.find(:all, 
                                    :include => [:project, :activity, :user, {:issue => :tracker}],
                                    :conditions => cond.conditions,
                                    :order => sort_clause,
                                    :limit  =>  @entry_pages.items_per_page,
                                    :offset =>  @entry_pages.current.offset)
          @total_hours = TimeEntry.sum(:hours, :include => [:project, :issue], :conditions => cond.conditions).to_f

          render :layout => !request.xhr?
        }
        format.api  {
          @entry_count = TimeEntry.count(:include => [:project, :issue], :conditions => cond.conditions)
          @entry_pages = Paginator.new self, @entry_count, per_page_option, params['page']
          @entries = TimeEntry.find(:all, 
                                    :include => [:project, :activity, :user, {:issue => :tracker}],
                                    :conditions => cond.conditions,
                                    :order => sort_clause,
                                    :limit  =>  @entry_pages.items_per_page,
                                    :offset =>  @entry_pages.current.offset)
          
          render :template => 'timelog/index.apit'
        }
        format.atom {
          entries = TimeEntry.find(:all,
                                   :include => [:project, :activity, :user, {:issue => :tracker}],
                                   :conditions => cond.conditions,
                                   :order => "#{TimeEntry.table_name}.created_on DESC",
                                   :limit => Setting.feeds_limit.to_i)
          render_feed(entries, :title => l(:label_spent_time))
        }
        format.csv {
          # Export all entries
          @entries = TimeEntry.find(:all, 
                                    :include => [:project, :activity, :user, {:issue => [:tracker, :assigned_to, :priority]}],
                                    :conditions => cond.conditions,
                                    :order => sort_clause)
          send_data(entries_to_csv(@entries), :type => 'text/csv; header=present', :filename => 'timelog.csv')
        }
      end
    end
  end
  
  def show
    respond_to do |format|
      # TODO: Implement html response
      format.html { render :nothing => true, :status => 406 }
      format.api  { render :template => 'timelog/show.apit' }
    end
  end

  def new
    @time_entry ||= TimeEntry.new(:project => @project, :issue => @issue, :user => User.current, :spent_on => User.current.today)
    @time_entry.attributes = params[:time_entry]
    
    call_hook(:controller_timelog_edit_before_save, { :params => params, :time_entry => @time_entry })
    render :action => 'edit'
  end

  verify :method => :post, :only => :create, :render => {:nothing => true, :status => :method_not_allowed }
  def create
    @time_entry ||= TimeEntry.new(:project => @project, :issue => @issue, :user => User.current, :spent_on => User.current.today)
    @time_entry.attributes = params[:time_entry]
    
    call_hook(:controller_timelog_edit_before_save, { :params => params, :time_entry => @time_entry })
    
    if @time_entry.save
      respond_to do |format|
        format.html {
          flash[:notice] = l(:notice_successful_update)
          redirect_back_or_default :action => 'index', :project_id => @time_entry.project
        }
        format.api  { render :template => 'timelog/show.apit', :status => :created, :location => time_entry_url(@time_entry) }
      end
    else
      respond_to do |format|
        format.html { render :action => 'edit' }
        format.api  { render_validation_errors(@time_entry) }
      end
    end    
  end
  
  def edit
    @time_entry.attributes = params[:time_entry]
    
    call_hook(:controller_timelog_edit_before_save, { :params => params, :time_entry => @time_entry })
  end

  verify :method => :put, :only => :update, :render => {:nothing => true, :status => :method_not_allowed }
  def update
    @time_entry.attributes = params[:time_entry]
    
    call_hook(:controller_timelog_edit_before_save, { :params => params, :time_entry => @time_entry })
    
    if @time_entry.save
      respond_to do |format|
        format.html {
          flash[:notice] = l(:notice_successful_update)
          redirect_back_or_default :action => 'index', :project_id => @time_entry.project
        }
        format.api  { head :ok }
      end
    else
      respond_to do |format|
        format.html { render :action => 'edit' }
        format.api  { render_validation_errors(@time_entry) }
      end
    end    
  end

  verify :method => :delete, :only => :destroy, :render => {:nothing => true, :status => :method_not_allowed }
  def destroy
    if @time_entry.destroy && @time_entry.destroyed?
      respond_to do |format|
        format.html {
          flash[:notice] = l(:notice_successful_delete)
          redirect_to :back
        }
        format.api  { head :ok }
      end
    else
      respond_to do |format|
        format.html {
          flash[:notice] = l(:notice_unable_delete_time_entry)
          redirect_to :back
        }
        format.api  { render_validation_errors(@time_entry) }
      end
    end
  rescue ::ActionController::RedirectBackError
    redirect_to :action => 'index', :project_id => @time_entry.project
  end

private
  def find_time_entry
    @time_entry = TimeEntry.find(params[:id])
    unless @time_entry.editable_by?(User.current)
      render_403
      return false
    end
    @project = @time_entry.project
  rescue ActiveRecord::RecordNotFound
    render_404
  end

  def find_project
    if issue_id = (params[:issue_id] || params[:time_entry] && params[:time_entry][:issue_id])
      @issue = Issue.find(issue_id)
      @project = @issue.project
    elsif project_id = (params[:project_id] || params[:time_entry] && params[:time_entry][:project_id])
      @project = Project.find(project_id)
    else
      render_404
      return false
    end
  rescue ActiveRecord::RecordNotFound
    render_404
  end
  
  def find_optional_project
    if !params[:issue_id].blank?
      @issue = Issue.find(params[:issue_id])
      @project = @issue.project
    elsif !params[:project_id].blank?
      @project = Project.find(params[:project_id])
    end
    deny_access unless User.current.allowed_to?(:view_time_entries, @project, :global => true)
  end
  
  # Retrieves the date range based on predefined ranges or specific from/to param dates
  def retrieve_date_range
    @free_period = false
    @from, @to = nil, nil

    if params[:period_type] == '1' || (params[:period_type].nil? && !params[:period].nil?)
      case params[:period].to_s
      when 'today'
        @from = @to = Date.today
      when 'yesterday'
        @from = @to = Date.today - 1
      when 'current_week'
        @from = Date.today - (Date.today.cwday - 1)%7
        @to = @from + 6
      when 'last_week'
        @from = Date.today - 7 - (Date.today.cwday - 1)%7
        @to = @from + 6
      when '7_days'
        @from = Date.today - 7
        @to = Date.today
      when 'current_month'
        @from = Date.civil(Date.today.year, Date.today.month, 1)
        @to = (@from >> 1) - 1
      when 'last_month'
        @from = Date.civil(Date.today.year, Date.today.month, 1) << 1
        @to = (@from >> 1) - 1
      when '30_days'
        @from = Date.today - 30
        @to = Date.today
      when 'current_year'
        @from = Date.civil(Date.today.year, 1, 1)
        @to = Date.civil(Date.today.year, 12, 31)
      end
    elsif params[:period_type] == '2' || (params[:period_type].nil? && (!params[:from].nil? || !params[:to].nil?))
      begin; @from = params[:from].to_s.to_date unless params[:from].blank?; rescue; end
      begin; @to = params[:to].to_s.to_date unless params[:to].blank?; rescue; end
      @free_period = true
    else
      # default
    end
    
    @from, @to = @to, @from if @from && @to && @from > @to
    @from ||= (TimeEntry.earilest_date_for_project(@project) || Date.today)
    @to   ||= (TimeEntry.latest_date_for_project(@project) || Date.today)
  end

end