#-- encoding: UTF-8

#-- copyright
# OpenProject is a project management system.
# Copyright (C) 2012-2017 the OpenProject Foundation (OPF)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2017 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# 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.
#
# See doc/COPYRIGHT.rdoc for more details.
#++

class TimelogController < ApplicationController
  menu_item :issues

  before_action :disable_api, except: [:index, :destroy]
  before_action :find_work_package, only: [:new, :create]
  before_action :find_project, only: [:new, :create]
  before_action :find_time_entry, only: [:show, :edit, :update, :destroy]
  before_action :authorize, except: [:index]
  before_action :find_optional_project, only: [:index]
  accept_key_auth :index, :show, :create, :update, :destroy

  include SortHelper
  include TimelogHelper
  include CustomFieldsHelper
  include PaginationHelper
  include OpenProject::ClientPreferenceExtractor

  menu_item :time_entries

  def index
    sort_init 'spent_on', 'desc'
    sort_update 'spent_on' => 'spent_on',
                'user' => 'user_id',
                'activity' => 'activity_id',
                'project' => "#{Project.table_name}.name",
                'work_package' => 'work_package_id',
                'comments' => 'comments',
                'hours' => 'hours'

    cond = ARCondition.new
    if @issue
      cond << "#{WorkPackage.table_name}.root_id = #{@issue.root_id} " +
              "AND #{WorkPackage.table_name}.lft >= #{@issue.lft} " +
              "AND #{WorkPackage.table_name}.rgt <= #{@issue.rgt}"
    elsif @project
      cond << @project.project_condition(Setting.display_subprojects_work_packages?)
    end

    retrieve_date_range
    cond << ['spent_on BETWEEN ? AND ?', @from, @to]

    respond_to do |format|
      format.html do
        # Paginate results
        @entry_count = TimeEntry
                       .visible
                       .includes(:project, :work_package)
                       .references(:projects)
                       .where(cond.conditions)
                       .count
        @total_hours = TimeEntry
                       .visible
                       .includes(:project, :work_package)
                       .references(:projects)
                       .where(cond.conditions)
                       .sum(:hours).to_f

        set_entries(cond)

        gon.rabl template: 'app/views/timelog/index.rabl'
        gon.project_id = @project.id if @project
        gon.work_package_id = @issue.id if @issue
        gon.sort_column = 'spent_on'
        gon.sort_direction = 'desc'
        gon.total_count = total_entry_count(cond)
        gon.settings = client_preferences

        render layout: !request.xhr?
      end
      format.json do
        set_entries(cond)

        gon.rabl template: 'app/views/timelog/index.rabl'
      end
      format.atom do
        entries = TimeEntry
                  .visible
                  .includes(:project, :activity, :user, work_package: :type)
                  .references(:projects)
                  .where(cond.conditions)
                  .order("#{TimeEntry.table_name}.created_on DESC")
                  .limit(Setting.feeds_limit.to_i)

        render_feed(entries, title: l(:label_spent_time))
      end
      format.csv do
        # Export all entries
        @entries = TimeEntry
                   .visible
                   .includes(:project,
                             :activity,
                             :user,
                             work_package: [:type,
                                            :assigned_to,
                                            :priority])
                   .references(:projects)
                   .where(cond.conditions)
                   .distinct(false)
                   .order(sort_clause)

        render csv: entries_to_csv(@entries), filename: 'timelog.csv'
      end
    end
  end

  def show
    respond_to do |format|
      # TODO: Implement html response
      format.html do
        render nothing: true, status: 406
      end
    end
  end

  def new
    @time_entry = new_time_entry(@project, @issue, permitted_params.time_entry.to_h)

    call_hook(:controller_timelog_edit_before_save, params: params, time_entry: @time_entry)

    render action: 'edit'
  end

  def create
    @time_entry = new_time_entry(@project, @issue, permitted_params.time_entry.to_h)

    save_time_entry_and_respond @time_entry
  end

  def edit
    @time_entry.attributes = permitted_params.time_entry

    call_hook(:controller_timelog_edit_before_save, params: params, time_entry: @time_entry)
  end

  def update
    @time_entry.attributes = permitted_params.time_entry

    save_time_entry_and_respond @time_entry
  end

  def destroy
    if @time_entry.destroy && @time_entry.destroyed?
      respond_to do |format|
        format.html do
          flash[:notice] = l(:notice_successful_delete)
          redirect_to :back
        end
        format.json do
          render json: { text: l(:notice_successful_delete) }
        end
      end
    else
      respond_to do |format|
        format.html do
          flash[:error] = l(:notice_unable_delete_time_entry)
          redirect_to :back
        end
        format.json do
          render json: { isError: true, text: l(:notice_unable_delete_time_entry) }
        end
      end
    end
  rescue ::ActionController::RedirectBackError
    redirect_to action: 'index', project_id: @time_entry.project
  end

  private

  def total_entry_count(cond)
    TimeEntry
      .visible
      .includes(:project, :activity, :user, work_package: :type)
      .references(:projects)
      .where(cond.conditions)
      .count
  end

  def set_entries(cond)
    # .visible introduces a distinct which we don't need here and which interferes
    # with the order on postgresql.
    # The distinct is therefore explicitly removed
    @entries = TimeEntry
               .visible
               .includes(:project, :activity, :user, work_package: :type)
               .references(:projects)
               .where(cond.conditions)
               .distinct(false)
               .order(sort_clause)
               .page(params[:page])
               .per_page(per_page_param)
  end

  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
    @project = Project.find(project_id_from_params) if @project.nil?
  rescue ActiveRecord::RecordNotFound
    render_404
  end

  def new_time_entry(project, work_package, attributes)
    time_entry = TimeEntry.new(project: project,
                               work_package: work_package,
                               user: User.current,
                               spent_on: User.current.today)

    time_entry.attributes = attributes

    time_entry
  end

  def save_time_entry_and_respond(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 do
          flash[:notice] = l(:notice_successful_update)
          redirect_back_or_default action: 'index', project_id: time_entry.project
        end
      end
    else
      respond_to do |format|
        format.html do
          render action: 'edit'
        end
      end
    end
  end

  def project_id_from_params
    if params.has_key?(:project_id)
      params[:project_id]
    elsif params.has_key?(:time_entry) && permitted_params.time_entry.has_key?(:project_id)
      permitted_params.time_entry[:project_id]
    end
  end

  def find_work_package
    @issue = work_package_from_params
    @project = @issue.project unless @issue.nil?
  end

  def work_package_from_params
    if params.has_key?(:work_package_id)
      work_package_id = params[:work_package_id]
    elsif params.has_key?(:time_entry) && permitted_params.time_entry.has_key?(:work_package_id)
      work_package_id = permitted_params.time_entry[:work_package_id]
    end

    WorkPackage.find_by id: work_package_id
  end

  def default_breadcrumb
    I18n.t(:label_spent_time)
  end
end