module EasyGanttHelper

  def easy_gantt_include_js(*javascripts, from_plugin: 'easy_gantt')
    plugin = from_plugin

    result = ''
    javascripts.flatten!
    javascripts.compact!
    javascripts.each do |javascript|
      result << javascript_include_tag("#{from_plugin}/#{javascript}", plugin: plugin)
    end
    result.html_safe
  end

  def easy_gantt_include_css(*stylesheets, media: 'screen', from_plugin: 'easy_gantt')
    plugin = from_plugin

    result = ''
    stylesheets.flatten!
    stylesheets.compact!
    stylesheets.each do |stylesheet|
      result << stylesheet_link_tag("#{from_plugin}/#{stylesheet}", plugin: plugin, media: media)
    end
    result.html_safe
  end

  def easy_gantt_js_button(text, options={})
    if text.is_a?(Symbol)
      lang_key = text
      text = l(lang_key, scope: [:easy_gantt, :button])
      options[:title] ||= l(lang_key, scope: [:easy_gantt, :title], default: text)
    end
    options[:class] = "gantt-menu-button #{options[:class]}"
    options[:class] << ' button' unless options.delete(:no_button)
    if (icon = options.delete(:icon))
      options[:class] << " icon #{icon}"
    end
    link_to(text, options[:url] || 'javascript:void(0)', options)
  end

  def easy_gantt_help_button(*args)
    options = args.extract_options!
    feature = args.shift
    text = args.shift

    options[:class] = "gantt-menu-help-button #{options[:class]}"
    options[:icon] ||= 'icon-help'
    options[:id] = 'button_' + feature.to_s + '_help'

    help_text = raw l(:text, scope: [:easy_gantt, :popup, feature])

    easy_gantt_js_button(text || '&#8203;'.html_safe, options) + %Q(
    <div id="#{feature}_help_modal" style="display:none">
      <h3 class="title">#{raw l(:heading, scope: [:easy_gantt, :popup, feature]) }</h3>
      <p>#{help_text}</p>
     </div>
    ).html_safe
  end

  def api_render_versions(api, versions)
    return if versions.blank?

    api.array :versions do
      versions.each do |version|
        api.version do
          api.id version.id
          api.name version.name
          api.start_date version.effective_date
          api.project_id version.project_id
          api.project_name version.project&.name
          api.permissions do
            api.editable version.gantt_editable?
          end
        end
      end
    end

  end

  def api_render_columns(api, query)
    api.array :columns do
      query.columns.each do |c|
        api.column do
          api.name c.name
          api.title c.caption
        end
      end
    end
  end

  def api_render_issues(api, issues, with_columns: false)
    api.array :issues do
      issues.each do |issue|
        api.issue do
          api.id issue.id
          api.name issue.subject
          api.start_date issue.start_date
          api.due_date issue.due_date
          api.estimated_hours issue.estimated_hours
          api.done_ratio issue.done_ratio
          api.closed issue.closed?
          api.fixed_version_id issue.fixed_version_id
          api.overdue issue.overdue?
          api.parent_issue_id issue.parent_id
          api.project_id issue.project_id
          api.tracker_id issue.tracker_id
          api.priority_id issue.priority_id
          api.status_id issue.status_id
          api.assigned_to_id issue.assigned_to_id

          if Setting.plugin_easy_gantt['show_task_soonest_start'] == '1' && @project.nil?
            api.soonest_start issue.soonest_start
          end
          if Setting.plugin_easy_gantt['show_task_latest_due'] == '1' && @project.nil?
            api.latest_due issue.latest_due
          end

          api.is_planned !!issue.project.try(:is_planned)

          api.permissions do
            api.editable issue.gantt_editable?
          end

          if with_columns
            api.array :columns do
              @query.columns.each do |c|
                api.column do
                  api.name c.name
                  api.value gantt_format_column(issue, c, c.value(issue))
                end
              end
            end
          end

        end
      end
    end
  end

  def api_render_relations(api, relations)
    api.array :relations do
      relations.each do |rel|
        api.relation do
          api.id rel.id
          api.source_id rel.issue_from_id
          api.target_id rel.issue_to_id
          api.type rel.relation_type
          api.delay rel.delay.to_i
        end
      end
    end
  end

  def api_render_projects(api, projects, with_columns: false)
    api.array :projects do
      projects.each do |project|
        api.project do
          api.id project.id
          api.name project.name
          api.start_date project.gantt_start_date || Date.today
          api.due_date project.gantt_due_date || Date.today
          api.parent_id project.parent_id
          api.is_baseline project.try(:easy_baseline_for_id?)

          # Schema
          api.status_id project.status
          api.priority_id project.try(:easy_priority_id)

          api.permissions do
            api.editable project.gantt_editable?
          end

          if Setting.plugin_easy_gantt['show_project_progress'] == '1'
            api.done_ratio project.gantt_completed_percent
          end

          if @projects_issues_counts && @projects_issues_counts.has_key?(project.id)
            api.issues_count @projects_issues_counts[project.id]
          end

          if @parent_ids && @parent_ids.include?(project.id)
            api.has_subprojects true
          end

          if with_columns
            api.array :columns do
              @query.columns.each do |c|
                api.column do
                  api.name c.name
                  api.value gantt_format_column(project, c, c.value(project))
                end
              end
            end
          end

        end
      end
    end
  end

  # This method exist because
  #   1. EntityAttributeHelper is for complex html formating
  #   2. Redmine doest not have it
  # Gantt should show light and non-html values
  def gantt_format_column(entity, column, value)
    if entity.is_a?(Project) && column.name == :status && respond_to?(:format_project_attribute)
      format_project_attribute(Project, column, value)
    elsif value.is_a?(Float)
      locale = User.current.language.presence || ::I18n.locale
      number_with_precision(value, locale: locale).to_s
    elsif value.is_a?(Array)
      value.join(', ')
    else
      value.to_s
    end
  end

end