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# redMine - project management software

# Copyright (C) 2006  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.

module TimelogHelper

  include ApplicationHelper

  def render_timelog_breadcrumb

    links = []

    links << link_to(l(:label_project_all), {:project_id => nil, :issue_id => nil})

    links << link_to(h(@project), {:project_id => @project, :issue_id => nil}) if @project

    if @issue

      if @issue.visible?

        links << link_to_issue(@issue, :subject => false)

      else

        links << "##{@issue.id}"

      end

    end

    breadcrumb links

  end

  # Returns a collection of activities for a select field.  time_entry

  # is optional and will be used to check if the selected TimeEntryActivity

  # is active.

  def activity_collection_for_select_options(time_entry=nil, project=nil)

    project ||= @project

    if project.nil?

      activities = TimeEntryActivity.shared.active

    else

      activities = project.activities

    end

    collection = []

    if time_entry && time_entry.activity && !time_entry.activity.active?

      collection << [ "--- #{l(:actionview_instancetag_blank_option)} ---", '' ]

    else

      collection << [ "--- #{l(:actionview_instancetag_blank_option)} ---", '' ] unless activities.detect(&:is_default)

    end

    activities.each { |a| collection << [a.name, a.id] }

    collection

  end

  def select_hours(data, criteria, value)

          if value.to_s.empty?

                  data.select {|row| row[criteria].blank? }

    else 

            data.select {|row| row[criteria].to_s == value.to_s}

    end

  end

  def sum_hours(data)

    sum = 0

    data.each do |row|

      sum += row['hours'].to_f

    end

    sum

  end

  def options_for_period_select(value)

    options_for_select([[l(:label_all_time), 'all'],

                        [l(:label_today), 'today'],

                        [l(:label_yesterday), 'yesterday'],

                        [l(:label_this_week), 'current_week'],

                        [l(:label_last_week), 'last_week'],

                        [l(:label_last_n_days, 7), '7_days'],

                        [l(:label_this_month), 'current_month'],

                        [l(:label_last_month), 'last_month'],

                        [l(:label_last_n_days, 30), '30_days'],

                        [l(:label_this_year), 'current_year']],

                        value)

  end

  def entries_to_csv(entries)

    ic = Iconv.new(l(:general_csv_encoding), 'UTF-8')    

    decimal_separator = l(:general_csv_decimal_separator)

    custom_fields = TimeEntryCustomField.find(:all)

    export = FCSV.generate(:col_sep => l(:general_csv_separator)) do |csv|

      # csv header fields

      headers = [l(:field_spent_on),

                 l(:field_user),

                 l(:field_activity),

                 l(:field_project),

                 l(:field_issue),

                 l(:field_tracker),

                 l(:field_subject),

                 l(:field_hours),

                 l(:field_comments)

                 ]

      # Export custom fields

      headers += custom_fields.collect(&:name)

      csv << headers.collect {|c| begin; ic.iconv(c.to_s); rescue; c.to_s; end }

      # csv lines

      entries.each do |entry|

        fields = [format_date(entry.spent_on),

                  entry.user,

                  entry.activity,

                  entry.project,

                  (entry.issue ? entry.issue.id : nil),

                  (entry.issue ? entry.issue.tracker : nil),

                  (entry.issue ? entry.issue.subject : nil),

                  entry.hours.to_s.gsub('.', decimal_separator),

                  entry.comments

                  ]

        fields += custom_fields.collect {|f| show_value(entry.custom_value_for(f)) }

        csv << fields.collect {|c| begin; ic.iconv(c.to_s); rescue; c.to_s; end }

      end

    end

    export

  end

  def format_criteria_value(criteria, value)

    if value.blank?

      l(:label_none)

    elsif k = @available_criterias[criteria][:klass]

      obj = k.find_by_id(value.to_i)

      if obj.is_a?(Issue)

        obj.visible? ? "#{obj.tracker} ##{obj.id}: #{obj.subject}" : "##{obj.id}"

      else

        obj

      end

    else

      format_value(value, @available_criterias[criteria][:format])

    end

  end

  def report_to_csv(criterias, periods, hours)

    export = FCSV.generate(:col_sep => l(:general_csv_separator)) do |csv|

      # Column headers

      headers = criterias.collect {|criteria| l(@available_criterias[criteria][:label]) }

      headers += periods

      headers << l(:label_total)

      csv << headers.collect {|c| to_utf8(c) }

      # Content

      report_criteria_to_csv(csv, criterias, periods, hours)

      # Total row

      row = [ l(:label_total) ] + [''] * (criterias.size - 1)

      total = 0

      periods.each do |period|

        sum = sum_hours(select_hours(hours, @columns, period.to_s))

        total += sum

        row << (sum > 0 ? "%.2f" % sum : '')

      end

      row << "%.2f" %total

      csv << row

    end

    export

  end

  def report_criteria_to_csv(csv, criterias, periods, hours, level=0)

    hours.collect {|h| h[criterias[level]].to_s}.uniq.each do |value|

      hours_for_value = select_hours(hours, criterias[level], value)

      next if hours_for_value.empty?

      row = [''] * level

      row << to_utf8(format_criteria_value(criterias[level], value))

      row += [''] * (criterias.length - level - 1)

      total = 0

      periods.each do |period|

        sum = sum_hours(select_hours(hours_for_value, @columns, period.to_s))

        total += sum

        row << (sum > 0 ? "%.2f" % sum : '')

      end

      row << "%.2f" %total

      csv << row

      if criterias.length > level + 1

        report_criteria_to_csv(csv, criterias, periods, hours_for_value, level + 1)

      end

    end

  end

  def to_utf8(s)

    @ic ||= Iconv.new(l(:general_csv_encoding), 'UTF-8')

    begin; @ic.iconv(s.to_s); rescue; s.to_s; end

  end

end