module Ecoportal
  module API
    class V2
      class Page < Common::Content::DoubleModel
        ALLOWED_KEYS  = [
          "id", "patch_ver", "name", "template_id",
          "base_tags", "tags",
          "time_zone", "created_at", "updated_at",
          "components", "sections", "stages",
          "permits", "mould_counter", "mould",
          "state", "task_priority",
          "votes_enabled", "upvotes", "downvotes",
          "forces", "force_errors", "subtags"
        ]

        passkey     :id
        passforced  :patch_ver, default: 1
        passthrough :name, :template_id
        passarray   :base_tags, :tags, order_matters: false
        passthrough :time_zone
        passdate    :created_at, :updated_at, read_only: true
        passthrough :can

        class_resolver :components_class, "Ecoportal::API::V2::Page::Components"
        class_resolver :sections_class,   "Ecoportal::API::V2::Page::Sections"
        class_resolver :stages_class,     "Ecoportal::API::V2::Page::Stages"
        class_resolver :forces_class,     "Ecoportal::API::V2::Page::Forces"

        embeds_many :components, enum_class: :components_class
        embeds_many :sections,   enum_class: :sections_class
        embeds_many :stages,     enum_class: :stages_class
        embeds_many :forces,     enum_class: :forces_class

        def initialize(doc = [], parent: self, key: nil)
          super(_doc_bug_fix(doc), parent: parent, key: key)
        end

        def ooze
          self
        end

        def as_update
          super.tap do |hash|
            unless !hash
              hash["data"].select! do |key, value|
                ALLOWED_KEYS.include?(key)
              end
              return nil if (hash["data"].keys - ["patch_ver"]).empty?
            end
          end
        end

        def stages?
          self.doc["stages"] && (self.stages.count > 0)
        end

        # @return [String] with feedback, if for this page instance, there are any of:
        #   1. components multi-section (fields belonging to more than one section)
        def validate
          msg = ""
          if (multi = components.multi_section).length > 0
            msg += "There are fields attached to more than one section:\n  • "
            msg += multi.map do |fld|
              fld.label
            end.join("\n  • ") + "\n"
          end

          msg.empty?? true : msg
        end

        private

        def _doc_bug_fix(hash)
          hash.tap do |hash|
            _fix_doc(hash["stages"], "flow_node_ids", "section_ids") if hash.key?("stages")
            if hash.key?("sections")
              _fix_doc(hash["sections"], "membrane_ids", "component_ids")
              _fix_doc(hash["sections"], "left_membrane_ids", "left_component_ids")
              _fix_doc(hash["sections"], "right_membrane_ids", "right_component_ids")
            end
          end
        end

        def _fix_doc(value, source, dest)
          value.tap do |value|
            case value
            when Array
              value.each {|v| _fix_doc(v, source, dest)}
            when Hash
              if value.key?(source) && !value.key?(dest)
                value[dest] = value[source]
                value.delete(source)
              end
            else
              # Do nothing!
            end
          end
        end

      end
    end
  end
end

require 'ecoportal/api/v2/page/mould_counter'
require 'ecoportal/api/v2/page/permission_flags'
require 'ecoportal/api/v2/page/permit'
require 'ecoportal/api/v2/page/component'
require 'ecoportal/api/v2/page/components'
require 'ecoportal/api/v2/page/section'
require 'ecoportal/api/v2/page/sections'
require 'ecoportal/api/v2/page/stage'
require 'ecoportal/api/v2/page/stages'
require 'ecoportal/api/v2/page/force'
require 'ecoportal/api/v2/page/forces'