require "cases/helper"

module ActiveRecord
  class Migration
    class CommandRecorderTest < ActiveRecord::TestCase
      def setup
        connection = ActiveRecord::Base.connection
        @recorder  = CommandRecorder.new(connection)
      end

      def test_respond_to_delegates
        recorder = CommandRecorder.new(Class.new {
          def america; end
        }.new)
        assert recorder.respond_to?(:america)
      end

      def test_send_calls_super
        assert_raises(NoMethodError) do
          @recorder.send(:non_existing_method, :horses)
        end
      end

      def test_send_delegates_to_record
        recorder = CommandRecorder.new(Class.new {
          def create_table(name); end
        }.new)
        assert recorder.respond_to?(:create_table), 'respond_to? create_table'
        recorder.send(:create_table, :horses)
        assert_equal [[:create_table, [:horses], nil]], recorder.commands
      end

      def test_unknown_commands_delegate
        recorder = CommandRecorder.new(stub(:foo => 'bar'))
        assert_equal 'bar', recorder.foo
      end

      def test_inverse_of_raise_exception_on_unknown_commands
        assert_raises(ActiveRecord::IrreversibleMigration) do
          @recorder.inverse_of :execute, ['some sql']
        end
      end

      def test_irreversible_commands_raise_exception
        assert_raises(ActiveRecord::IrreversibleMigration) do
          @recorder.revert{ @recorder.execute 'some sql' }
        end
      end

      def test_record
        @recorder.record :create_table, [:system_settings]
        assert_equal 1, @recorder.commands.length
      end

      def test_inverted_commands_are_reversed
        @recorder.revert do
          @recorder.record :create_table, [:hello]
          @recorder.record :create_table, [:world]
        end
        tables = @recorder.commands.map{|_cmd, args, _block| args}
        assert_equal [[:world], [:hello]], tables
      end

      def test_revert_order
        block = Proc.new{|t| t.string :name }
        @recorder.instance_eval do
          create_table("apples", &block)
          revert do
            create_table("bananas", &block)
            revert do
              create_table("clementines", &block)
              create_table("dates")
            end
            create_table("elderberries")
          end
          revert do
            create_table("figs", &block)
            create_table("grapes")
          end
        end
        assert_equal [[:create_table, ["apples"], block], [:drop_table, ["elderberries"], nil],
                      [:create_table, ["clementines"], block], [:create_table, ["dates"], nil],
                      [:drop_table, ["bananas"], block], [:drop_table, ["grapes"], nil],
                      [:drop_table, ["figs"], block]], @recorder.commands
      end

      def test_invert_change_table
        @recorder.revert do
          @recorder.change_table :fruits do |t|
            t.string :name
            t.rename :kind, :cultivar
          end
        end
        assert_equal [
          [:rename_column, [:fruits, :cultivar, :kind]],
          [:remove_column, [:fruits, :name, :string, {}], nil],
        ], @recorder.commands

        assert_raises(ActiveRecord::IrreversibleMigration) do
          @recorder.revert do
            @recorder.change_table :fruits do |t|
              t.remove :kind
            end
          end
        end
      end

      def test_invert_create_table
        @recorder.revert do
          @recorder.record :create_table, [:system_settings]
        end
        drop_table = @recorder.commands.first
        assert_equal [:drop_table, [:system_settings], nil], drop_table
      end

      def test_invert_create_table_with_options_and_block
        block = Proc.new{}
        drop_table = @recorder.inverse_of :create_table, [:people_reminders, id: false], &block
        assert_equal [:drop_table, [:people_reminders, id: false], block], drop_table
      end

      def test_invert_drop_table
        block = Proc.new{}
        create_table = @recorder.inverse_of :drop_table, [:people_reminders, id: false], &block
        assert_equal [:create_table, [:people_reminders, id: false], block], create_table
      end

      def test_invert_drop_table_without_a_block_nor_option
        assert_raises(ActiveRecord::IrreversibleMigration) do
          @recorder.inverse_of :drop_table, [:people_reminders]
        end
      end

      def test_invert_create_join_table
        drop_join_table = @recorder.inverse_of :create_join_table, [:musics, :artists]
        assert_equal [:drop_join_table, [:musics, :artists], nil], drop_join_table
      end

      def test_invert_create_join_table_with_table_name
        drop_join_table = @recorder.inverse_of :create_join_table, [:musics, :artists, table_name: :catalog]
        assert_equal [:drop_join_table, [:musics, :artists, table_name: :catalog], nil], drop_join_table
      end

      def test_invert_drop_join_table
        block = Proc.new{}
        create_join_table = @recorder.inverse_of :drop_join_table, [:musics, :artists, table_name: :catalog], &block
        assert_equal [:create_join_table, [:musics, :artists, table_name: :catalog], block], create_join_table
      end

      def test_invert_rename_table
        rename = @recorder.inverse_of :rename_table, [:old, :new]
        assert_equal [:rename_table, [:new, :old]], rename
      end

      def test_invert_add_column
        remove = @recorder.inverse_of :add_column, [:table, :column, :type, {}]
        assert_equal [:remove_column, [:table, :column, :type, {}], nil], remove
      end

      def test_invert_change_column
        assert_raises(ActiveRecord::IrreversibleMigration) do
          @recorder.inverse_of :change_column, [:table, :column, :type, {}]
        end
      end

      def test_invert_change_column_default
        assert_raises(ActiveRecord::IrreversibleMigration) do
          @recorder.inverse_of :change_column_default, [:table, :column, 'default_value']
        end
      end

      def test_invert_change_column_null
        add = @recorder.inverse_of :change_column_null, [:table, :column, true]
        assert_equal [:change_column_null, [:table, :column, false]], add
      end

      def test_invert_remove_column
        add = @recorder.inverse_of :remove_column, [:table, :column, :type, {}]
        assert_equal [:add_column, [:table, :column, :type, {}], nil], add
      end

      def test_invert_remove_column_without_type
        assert_raises(ActiveRecord::IrreversibleMigration) do
          @recorder.inverse_of :remove_column, [:table, :column]
        end
      end

      def test_invert_rename_column
        rename = @recorder.inverse_of :rename_column, [:table, :old, :new]
        assert_equal [:rename_column, [:table, :new, :old]], rename
      end

      def test_invert_add_index
        remove = @recorder.inverse_of :add_index, [:table, [:one, :two]]
        assert_equal [:remove_index, [:table, {column: [:one, :two]}]], remove
      end

      def test_invert_add_index_with_name
        remove = @recorder.inverse_of :add_index, [:table, [:one, :two], name: "new_index"]
        assert_equal [:remove_index, [:table, {name: "new_index"}]], remove
      end

      def test_invert_add_index_with_no_options
        remove = @recorder.inverse_of :add_index, [:table, [:one, :two]]
        assert_equal [:remove_index, [:table, {column: [:one, :two]}]], remove
      end

      def test_invert_remove_index
        add = @recorder.inverse_of :remove_index, [:table, {column: [:one, :two], options: true}]
        assert_equal [:add_index, [:table, [:one, :two], options: true]], add
      end

      def test_invert_remove_index_with_name
        add = @recorder.inverse_of :remove_index, [:table, {column: [:one, :two], name: "new_index"}]
        assert_equal [:add_index, [:table, [:one, :two], name: "new_index"]], add
      end

      def test_invert_remove_index_with_no_special_options
        add = @recorder.inverse_of :remove_index, [:table, {column: [:one, :two]}]
        assert_equal [:add_index, [:table, [:one, :two], {}]], add
      end

      def test_invert_remove_index_with_no_column
        assert_raises(ActiveRecord::IrreversibleMigration) do
          @recorder.inverse_of :remove_index, [:table, name: "new_index"]
        end
      end

      def test_invert_rename_index
        rename = @recorder.inverse_of :rename_index, [:table, :old, :new]
        assert_equal [:rename_index, [:table, :new, :old]], rename
      end

      def test_invert_add_timestamps
        remove = @recorder.inverse_of :add_timestamps, [:table]
        assert_equal [:remove_timestamps, [:table], nil], remove
      end

      def test_invert_remove_timestamps
        add = @recorder.inverse_of :remove_timestamps, [:table, { null: true }]
        assert_equal [:add_timestamps, [:table, {null: true }], nil], add
      end

      def test_invert_add_reference
        remove = @recorder.inverse_of :add_reference, [:table, :taggable, { polymorphic: true }]
        assert_equal [:remove_reference, [:table, :taggable, { polymorphic: true }], nil], remove
      end

      def test_invert_add_belongs_to_alias
        remove = @recorder.inverse_of :add_belongs_to, [:table, :user]
        assert_equal [:remove_reference, [:table, :user], nil], remove
      end

      def test_invert_remove_reference
        add = @recorder.inverse_of :remove_reference, [:table, :taggable, { polymorphic: true }]
        assert_equal [:add_reference, [:table, :taggable, { polymorphic: true }], nil], add
      end

      def test_invert_remove_reference_with_index_and_foreign_key
        add = @recorder.inverse_of :remove_reference, [:table, :taggable, { index: true, foreign_key: true }]
        assert_equal [:add_reference, [:table, :taggable, { index: true, foreign_key: true }], nil], add
      end

      def test_invert_remove_belongs_to_alias
        add = @recorder.inverse_of :remove_belongs_to, [:table, :user]
        assert_equal [:add_reference, [:table, :user], nil], add
      end

      def test_invert_enable_extension
        disable = @recorder.inverse_of :enable_extension, ['uuid-ossp']
        assert_equal [:disable_extension, ['uuid-ossp'], nil], disable
      end

      def test_invert_disable_extension
        enable = @recorder.inverse_of :disable_extension, ['uuid-ossp']
        assert_equal [:enable_extension, ['uuid-ossp'], nil], enable
      end

      def test_invert_add_foreign_key
        enable = @recorder.inverse_of :add_foreign_key, [:dogs, :people]
        assert_equal [:remove_foreign_key, [:dogs, :people]], enable
      end

      def test_invert_add_foreign_key_with_column
        enable = @recorder.inverse_of :add_foreign_key, [:dogs, :people, column: "owner_id"]
        assert_equal [:remove_foreign_key, [:dogs, column: "owner_id"]], enable
      end

      def test_invert_add_foreign_key_with_column_and_name
        enable = @recorder.inverse_of :add_foreign_key, [:dogs, :people, column: "owner_id", name: "fk"]
        assert_equal [:remove_foreign_key, [:dogs, name: "fk"]], enable
      end

      def test_remove_foreign_key_is_irreversible
        assert_raises ActiveRecord::IrreversibleMigration do
          @recorder.inverse_of :remove_foreign_key, [:dogs, column: "owner_id"]
        end

        assert_raises ActiveRecord::IrreversibleMigration do
          @recorder.inverse_of :remove_foreign_key, [:dogs, name: "fk"]
        end
      end
    end
  end
end
