module Decidim::Meetings::Directory::ApplicationHelper

def activity_filter_values
  [
    ["all", t("decidim.meetings.meetings.filters.all")],
    ["my_meetings", t("decidim.meetings.meetings.filters.my_meetings")]
  ]
end

def categories_values(sorted_main_categories)
  sorted_main_categories.flat_map do |category|
    sorted_descendant_categories = category.descendants.includes(:subcategories).sort_by do |subcategory|
      [subcategory.weight, translated_attribute(subcategory.name, current_organization)]
    end
    subcategories = sorted_descendant_categories.flat_map do |subcategory|
      TreePoint.new(subcategory.id.to_s, translated_attribute(subcategory.name, current_organization))
    end
    TreeNode.new(
      TreePoint.new(category.id.to_s, translated_attribute(category.name, current_organization)),
      subcategories
    )
  end
end

def directory_filter_categories_values
  participatory_spaces = current_organization.public_participatory_spaces
  list_of_ps = participatory_spaces.flat_map do |current_participatory_space|
    next unless current_participatory_space.respond_to?(:categories)
    sorted_main_categories = current_participatory_space.categories.first_class.includes(:subcategories).sort_by do |category|
      [category.weight, translated_attribute(category.name, current_organization)]
    end
    categories_values = categories_values(sorted_main_categories)
    next if categories_values.empty?
    key_point = current_participatory_space.class.name.gsub("::", "__") + current_participatory_space.id.to_s
    TreeNode.new(
      TreePoint.new(key_point, translated_attribute(current_participatory_space.title, current_organization)),
      categories_values
    )
  end
  list_of_ps.compact!
  TreeNode.new(
    TreePoint.new("", t("decidim.meetings.application_helper.filter_category_values.all")),
    list_of_ps
  )
end

def directory_filter_origin_values
  origin_values = []
  origin_values << TreePoint.new("official", t("decidim.meetings.meetings.filters.origin_values.official"))
  origin_values << TreePoint.new("participants", t("decidim.meetings.meetings.filters.origin_values.participants"))
  origin_values << TreePoint.new("user_group", t("decidim.meetings.meetings.filters.origin_values.user_groups")) if current_organization.user_groups_enabled?
  TreeNode.new(
    TreePoint.new("", t("decidim.meetings.meetings.filters.origin_values.all")),
    origin_values
  )
end

def directory_filter_scopes_values
  main_scopes = current_organization.scopes.top_level
  scopes_values = main_scopes.includes(:scope_type, :children).flat_map do |scope|
    TreeNode.new(
      TreePoint.new(scope.id.to_s, translated_attribute(scope.name, current_organization)),
      scope_children_to_tree(scope)
    )
  end
  scopes_values.prepend(TreePoint.new("global", t("decidim.scopes.global")))
  TreeNode.new(
    TreePoint.new("", t("decidim.meetings.application_helper.filter_scope_values.all")),
    scopes_values
  )
end

def directory_meeting_spaces_values
  participatory_spaces = current_organization.public_participatory_spaces
  spaces = participatory_spaces.collect(&:model_name).uniq.map do |participatory_space|
    TreePoint.new(participatory_space.name.underscore, participatory_space.human(count: 2))
  end
  TreeNode.new(
    TreePoint.new("", t("decidim.meetings.application_helper.filter_meeting_space_values.all")),
    spaces
  )
end

def filter_date_values
  [
    ["all", t("decidim.meetings.meetings.filters.date_values.all")],
    ["upcoming", t("decidim.meetings.meetings.filters.date_values.upcoming")],
    ["past", t("decidim.meetings.meetings.filters.date_values.past")]
  ]
end

def filter_type_values
  type_values = []
  Decidim::Meetings::Meeting::TYPE_OF_MEETING.each do |type|
    type_values << TreePoint.new(type, t("decidim.meetings.meetings.filters.type_values.#{type}"))
  end
  TreeNode.new(
    TreePoint.new("", t("decidim.meetings.meetings.filters.type_values.all")),
    type_values
  )
end

def scope_children_to_tree(scope)
  return unless scope.children.any?
  scope.children.includes(:scope_type, :children).flat_map do |child|
    TreeNode.new(
      TreePoint.new(child.id.to_s, translated_attribute(child.name, current_organization)),
      scope_children_to_tree(child)
    )
  end
end