# 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.

require 'csv'

module IssuesHelper
  include ApplicationHelper

  def render_issue_tooltip(issue)
    @cached_label_start_date ||= l(:field_start_date)
    @cached_label_due_date ||= l(:field_due_date)
    @cached_label_assigned_to ||= l(:field_assigned_to)
    @cached_label_priority ||= l(:field_priority)
    
    link_to_issue(issue) + ": #{h(issue.subject)}<br /><br />" +
      "<strong>#{@cached_label_start_date}</strong>: #{format_date(issue.start_date)}<br />" +
      "<strong>#{@cached_label_due_date}</strong>: #{format_date(issue.due_date)}<br />" +
      "<strong>#{@cached_label_assigned_to}</strong>: #{issue.assigned_to}<br />" +
      "<strong>#{@cached_label_priority}</strong>: #{issue.priority.name}"
  end
  
  # Returns a string of css classes that apply to the given issue
  def css_issue_classes(issue)
    s = "issue status-#{issue.status.position} priority-#{issue.priority.position}"
    s << ' closed' if issue.closed?
    s << ' overdue' if issue.overdue?
    s << ' created-by-me' if User.current.logged? && issue.author_id == User.current.id
    s << ' assigned-to-me' if User.current.logged? && issue.assigned_to_id == User.current.id
    s
  end
  
  def sidebar_queries
    unless @sidebar_queries
      # User can see public queries and his own queries
      visible = ARCondition.new(["is_public = ? OR user_id = ?", true, (User.current.logged? ? User.current.id : 0)])
      # Project specific queries and global queries
      visible << (@project.nil? ? ["project_id IS NULL"] : ["project_id IS NULL OR project_id = ?", @project.id])
      @sidebar_queries = Query.find(:all, 
                                    :order => "name ASC",
                                    :conditions => visible.conditions)
    end
    @sidebar_queries
  end

  def show_detail(detail, no_html=false)
    case detail.property
    when 'attr'
      label = l(("field_" + detail.prop_key.to_s.gsub(/\_id$/, "")).to_sym)   
      case detail.prop_key
      when 'due_date', 'start_date'
        value = format_date(detail.value.to_date) if detail.value
        old_value = format_date(detail.old_value.to_date) if detail.old_value
      when 'project_id'
        p = Project.find_by_id(detail.value) and value = p.name if detail.value
        p = Project.find_by_id(detail.old_value) and old_value = p.name if detail.old_value
      when 'status_id'
        s = IssueStatus.find_by_id(detail.value) and value = s.name if detail.value
        s = IssueStatus.find_by_id(detail.old_value) and old_value = s.name if detail.old_value
      when 'tracker_id'
        t = Tracker.find_by_id(detail.value) and value = t.name if detail.value
        t = Tracker.find_by_id(detail.old_value) and old_value = t.name if detail.old_value
      when 'assigned_to_id'
        u = User.find_by_id(detail.value) and value = u.name if detail.value
        u = User.find_by_id(detail.old_value) and old_value = u.name if detail.old_value
      when 'priority_id'
        e = Enumeration.find_by_id(detail.value) and value = e.name if detail.value
        e = Enumeration.find_by_id(detail.old_value) and old_value = e.name if detail.old_value
      when 'category_id'
        c = IssueCategory.find_by_id(detail.value) and value = c.name if detail.value
        c = IssueCategory.find_by_id(detail.old_value) and old_value = c.name if detail.old_value
      when 'fixed_version_id'
        v = Version.find_by_id(detail.value) and value = v.name if detail.value
        v = Version.find_by_id(detail.old_value) and old_value = v.name if detail.old_value
      when 'estimated_hours'
        value = "%0.02f" % detail.value.to_f unless detail.value.blank?
        old_value = "%0.02f" % detail.old_value.to_f unless detail.old_value.blank?
      end
    when 'cf'
      custom_field = CustomField.find_by_id(detail.prop_key)
      if custom_field
        label = custom_field.name
        value = format_value(detail.value, custom_field.field_format) if detail.value
        old_value = format_value(detail.old_value, custom_field.field_format) if detail.old_value
      end
    when 'attachment'
      label = l(:label_attachment)
    end
    call_hook(:helper_issues_show_detail_after_setting, {:detail => detail, :label => label, :value => value, :old_value => old_value })

    label ||= detail.prop_key
    value ||= detail.value
    old_value ||= detail.old_value
    
    unless no_html
      label = content_tag('strong', label)
      old_value = content_tag("i", h(old_value)) if detail.old_value
      old_value = content_tag("strike", old_value) if detail.old_value and (!detail.value or detail.value.empty?)
      if detail.property == 'attachment' && !value.blank? && a = Attachment.find_by_id(detail.prop_key)
        # Link to the attachment if it has not been removed
        value = link_to_attachment(a)
      else
        value = content_tag("i", h(value)) if value
      end
    end
    
    if !detail.value.blank?
      case detail.property
      when 'attr', 'cf'
        if !detail.old_value.blank?
          label + " " + l(:text_journal_changed, :old => old_value, :new => value)
        else
          label + " " + l(:text_journal_set_to, value)
        end
      when 'attachment'
        "#{label} #{value} #{l(:label_added)}"
      end
    else
      case detail.property
      when 'attr', 'cf'
        label + " " + l(:text_journal_deleted) + " (#{old_value})"
      when 'attachment'
        "#{label} #{old_value} #{l(:label_deleted)}"
      end
    end
  end
  
  def issues_to_csv(issues, project = nil)
    ic = Iconv.new(l(:general_csv_encoding), 'UTF-8')    
    decimal_separator = l(:general_csv_decimal_separator)
    export = StringIO.new
    CSV::Writer.generate(export, l(:general_csv_separator)) do |csv|
      # csv header fields
      headers = [ "#",
                  l(:field_status), 
                  l(:field_project),
                  l(:field_tracker),
                  l(:field_priority),
                  l(:field_subject),
                  l(:field_assigned_to),
                  l(:field_category),
                  l(:field_fixed_version),
                  l(:field_author),
                  l(:field_start_date),
                  l(:field_due_date),
                  l(:field_done_ratio),
                  l(:field_estimated_hours),
                  l(:field_created_on),
                  l(:field_updated_on)
                  ]
      # Export project custom fields if project is given
      # otherwise export custom fields marked as "For all projects"
      custom_fields = project.nil? ? IssueCustomField.for_all : project.all_issue_custom_fields
      custom_fields.each {|f| headers << f.name}
      # Description in the last column
      headers << l(:field_description)
      csv << headers.collect {|c| begin; ic.iconv(c.to_s); rescue; c.to_s; end }
      # csv lines
      issues.each do |issue|
        fields = [issue.id,
                  issue.status.name, 
                  issue.project.name,
                  issue.tracker.name, 
                  issue.priority.name,
                  issue.subject,
                  issue.assigned_to,
                  issue.category,
                  issue.fixed_version,
                  issue.author.name,
                  format_date(issue.start_date),
                  format_date(issue.due_date),
                  issue.done_ratio,
                  issue.estimated_hours.to_s.gsub('.', decimal_separator),
                  format_time(issue.created_on),  
                  format_time(issue.updated_on)
                  ]
        custom_fields.each {|f| fields << show_value(issue.custom_value_for(f)) }
        fields << issue.description
        csv << fields.collect {|c| begin; ic.iconv(c.to_s); rescue; c.to_s; end }
      end
    end
    export.rewind
    export
  end
end