module Effective
  module CrudController
    module Submits

      # { 'Save' => { action: save, ...}}
      def submits
        @_effective_submits ||= effective_resource.submits()
      end

      # { 'Approve' => { action: approve, ...}}
      def buttons
        @_effective_buttons ||= effective_resource.buttons()
      end

      # { :approve => { redirect: .. }}
      def ons
        @_effective_ons ||= effective_resource.ons()
      end

      # :only, :except, :if, :unless, :redirect, :success, :danger, :class
      def _insert_submit(action, label = nil, args = {})
        raise "expected first argument to be a Symbol. Try submit :approve, 'Approve'" unless action.kind_of?(Symbol)
        raise 'expected args to be a Hash or false' unless args.kind_of?(Hash) || args == false

        if label == false
          submits.delete_if { |label, args| args[:action] == action }; return
        end

        if args == false
          submits.delete(label); return
        end

        if label # Overwrite the default member action when given a custom submit
          submits.delete_if { |label, args| args[:default] && args[:action] == action }
        end

        if args.key?(:if) && args[:if].respond_to?(:call) == false
          raise "expected if: to be callable. Try submit :approve, 'Save and Approve', if: -> { resource.finished? }"
        end

        if args.key?(:unless) && args[:unless].respond_to?(:call) == false
          raise "expected unless: to be callable. Try submit :approve, 'Save and Approve', unless: -> { resource.declined? }"
        end

        if args.key?(:only)
          args[:only] = Array(args[:only])
          raise "expected only: to be a symbol or array of symbols. Try submit :approve, 'Save and Approve', only: [:edit]" unless args[:only].all? { |v| v.kind_of?(Symbol) }
        end

        if args.key?(:except)
          args[:except] = Array(args[:except])
          raise "expected except: to be a symbol or array of symbols. Try submit :approve, 'Save and Approve', except: [:edit]" unless args[:except].all? { |v| v.kind_of?(Symbol) }
        end

        if args.key?(:redirect_to) # Normalize this option to redirect
          args[:redirect] = args.delete(:redirect_to)
        end

        args[:action] = action

        (submits[label] ||= {}).merge!(args)
      end

      def _insert_button(action, label = nil, args = {})
        raise "expected first argument to be a Symbol. Try button :approve, 'Approve'" unless action.kind_of?(Symbol)
        raise 'expected args to be a Hash or false' unless args.kind_of?(Hash) || args == false

        if label == false
          buttons.delete_if { |label, args| args[:action] == action }; return
        end

        if args == false
          buttons.delete(label); return
        end

        if label # Overwrite the default member action when given a custom label
          buttons.delete_if { |label, args| args[:default] && args[:action] == action }
        end

        if args.key?(:if) && args[:if].respond_to?(:call) == false
          raise "expected if: to be callable. Try button :approve, 'Approve', if: -> { resource.finished? }"
        end

        if args.key?(:unless) && args[:unless].respond_to?(:call) == false
          raise "expected unless: to be callable. Try button :approve, 'Approve', unless: -> { resource.declined? }"
        end

        if args.key?(:only)
          args[:only] = Array(args[:only])
          raise "expected only: to be a symbol or array of symbols. Try button :approve, 'Save and Approve', only: [:edit]" unless args[:only].all? { |v| v.kind_of?(Symbol) }
        end

        if args.key?(:except)
          args[:except] = Array(args[:except])
          raise "expected except: to be a symbol or array of symbols. Try button :approve, 'Save and Approve', except: [:edit]" unless args[:except].all? { |v| v.kind_of?(Symbol) }
        end

        if args.key?(:redirect_to) # Normalize this option to redirect
          args[:redirect] = args.delete(:redirect_to)
        end

        args[:action] = action

        (buttons[label] ||= {}).merge!(args)
      end

      def _insert_on(action, args = {})
        raise "expected first argument to be a Symbol. Try on :approve, success: -> { ... }" unless action.kind_of?(Symbol)
        raise 'expected args to be a Hash' unless args.kind_of?(Hash)

        if args.key?(:redirect_to) # Normalize this option to redirect
          args[:redirect] = args.delete(:redirect_to)
        end

        args[:action] = action

        (ons[action] ||= {}).merge!(args)
      end
    end

  end
end