require "cases/helper"
require 'support/schema_dumping_helper'

if ActiveRecord::Base.connection.supports_extensions?
  class PostgresqlHstoreTest < ActiveRecord::PostgreSQLTestCase
    include SchemaDumpingHelper
    class Hstore < ActiveRecord::Base
      self.table_name = 'hstores'

      store_accessor :settings, :language, :timezone
    end

    def setup
      @connection = ActiveRecord::Base.connection

      unless @connection.extension_enabled?('hstore')
        @connection.enable_extension 'hstore'
        @connection.commit_db_transaction
      end

      @connection.reconnect!

      @connection.transaction do
        @connection.create_table('hstores') do |t|
          t.hstore 'tags', :default => ''
          t.hstore 'payload', array: true
          t.hstore 'settings'
        end
      end
      Hstore.reset_column_information
      @column = Hstore.columns_hash['tags']
      @type = Hstore.type_for_attribute("tags")
    end

    teardown do
      @connection.drop_table 'hstores', if_exists: true
    end

    def test_hstore_included_in_extensions
      assert @connection.respond_to?(:extensions), "connection should have a list of extensions"
      assert @connection.extensions.include?('hstore'), "extension list should include hstore"
    end

    def test_disable_enable_hstore
      assert @connection.extension_enabled?('hstore')
      @connection.disable_extension 'hstore'
      assert_not @connection.extension_enabled?('hstore')
      @connection.enable_extension 'hstore'
      assert @connection.extension_enabled?('hstore')
    ensure
      # Restore column(s) dropped by `drop extension hstore cascade;`
      load_schema
    end

    def test_column
      assert_equal :hstore, @column.type
      assert_equal "hstore", @column.sql_type
      assert_not @column.array?

      assert_not @type.binary?
    end

    def test_default
      @connection.add_column 'hstores', 'permissions', :hstore, default: '"users"=>"read", "articles"=>"write"'
      Hstore.reset_column_information

      assert_equal({"users"=>"read", "articles"=>"write"}, Hstore.column_defaults['permissions'])
      assert_equal({"users"=>"read", "articles"=>"write"}, Hstore.new.permissions)
    ensure
      Hstore.reset_column_information
    end

    def test_change_table_supports_hstore
      @connection.transaction do
        @connection.change_table('hstores') do |t|
          t.hstore 'users', default: ''
        end
        Hstore.reset_column_information
        column = Hstore.columns_hash['users']
        assert_equal :hstore, column.type

        raise ActiveRecord::Rollback # reset the schema change
      end
    ensure
      Hstore.reset_column_information
    end

    def test_hstore_migration
      hstore_migration = Class.new(ActiveRecord::Migration::Current) do
        def change
          change_table("hstores") do |t|
            t.hstore :keys
          end
        end
      end

      hstore_migration.new.suppress_messages do
        hstore_migration.migrate(:up)
        assert_includes @connection.columns(:hstores).map(&:name), "keys"
        hstore_migration.migrate(:down)
        assert_not_includes @connection.columns(:hstores).map(&:name), "keys"
      end
    end

    def test_cast_value_on_write
      x = Hstore.new tags: {"bool" => true, "number" => 5}
      assert_equal({"bool" => true, "number" => 5}, x.tags_before_type_cast)
      assert_equal({"bool" => "true", "number" => "5"}, x.tags)
      x.save
      assert_equal({"bool" => "true", "number" => "5"}, x.reload.tags)
    end

    def test_type_cast_hstore
      assert_equal({'1' => '2'}, @type.deserialize("\"1\"=>\"2\""))
      assert_equal({}, @type.deserialize(""))
      assert_equal({'key'=>nil}, @type.deserialize('key => NULL'))
      assert_equal({'c'=>'}','"a"'=>'b "a b'}, @type.deserialize(%q(c=>"}", "\"a\""=>"b \"a b")))
    end

    def test_with_store_accessors
      x = Hstore.new(language: "fr", timezone: "GMT")
      assert_equal "fr", x.language
      assert_equal "GMT", x.timezone

      x.save!
      x = Hstore.first
      assert_equal "fr", x.language
      assert_equal "GMT", x.timezone

      x.language = "de"
      x.save!

      x = Hstore.first
      assert_equal "de", x.language
      assert_equal "GMT", x.timezone
    end

    def test_duplication_with_store_accessors
      x = Hstore.new(language: "fr", timezone: "GMT")
      assert_equal "fr", x.language
      assert_equal "GMT", x.timezone

      y = x.dup
      assert_equal "fr", y.language
      assert_equal "GMT", y.timezone
    end

    def test_yaml_round_trip_with_store_accessors
      x = Hstore.new(language: "fr", timezone: "GMT")
      assert_equal "fr", x.language
      assert_equal "GMT", x.timezone

      y = YAML.load(YAML.dump(x))
      assert_equal "fr", y.language
      assert_equal "GMT", y.timezone
    end

    def test_changes_in_place
      hstore = Hstore.create!(settings: { 'one' => 'two' })
      hstore.settings['three'] = 'four'
      hstore.save!
      hstore.reload

      assert_equal 'four', hstore.settings['three']
      assert_not hstore.changed?
    end

    def test_gen1
      assert_equal(%q(" "=>""), @type.serialize({' '=>''}))
    end

    def test_gen2
      assert_equal(%q(","=>""), @type.serialize({','=>''}))
    end

    def test_gen3
      assert_equal(%q("="=>""), @type.serialize({'='=>''}))
    end

    def test_gen4
      assert_equal(%q(">"=>""), @type.serialize({'>'=>''}))
    end

    def test_parse1
      assert_equal({'a'=>nil,'b'=>nil,'c'=>'NuLl','null'=>'c'}, @type.deserialize('a=>null,b=>NuLl,c=>"NuLl",null=>c'))
    end

    def test_parse2
      assert_equal({" " => " "},  @type.deserialize("\\ =>\\ "))
    end

    def test_parse3
      assert_equal({"=" => ">"},  @type.deserialize("==>>"))
    end

    def test_parse4
      assert_equal({"=a"=>"q=w"},   @type.deserialize('\=a=>q=w'))
    end

    def test_parse5
      assert_equal({"=a"=>"q=w"},   @type.deserialize('"=a"=>q\=w'))
    end

    def test_parse6
      assert_equal({"\"a"=>"q>w"},  @type.deserialize('"\"a"=>q>w'))
    end

    def test_parse7
      assert_equal({"\"a"=>"q\"w"}, @type.deserialize('\"a=>q"w'))
    end

    def test_rewrite
      @connection.execute "insert into hstores (tags) VALUES ('1=>2')"
      x = Hstore.first
      x.tags = { '"a\'' => 'b' }
      assert x.save!
    end

    def test_select
      @connection.execute "insert into hstores (tags) VALUES ('1=>2')"
      x = Hstore.first
      assert_equal({'1' => '2'}, x.tags)
    end

    def test_array_cycle
      assert_array_cycle([{"AA" => "BB", "CC" => "DD"}, {"AA" => nil}])
    end

    def test_array_strings_with_quotes
      assert_array_cycle([{'this has' => 'some "s that need to be escaped"'}])
    end

    def test_array_strings_with_commas
      assert_array_cycle([{'this,has' => 'many,values'}])
    end

    def test_array_strings_with_array_delimiters
      assert_array_cycle(['{' => '}'])
    end

    def test_array_strings_with_null_strings
      assert_array_cycle([{'NULL' => 'NULL'}])
    end

    def test_contains_nils
      assert_array_cycle([{'NULL' => nil}])
    end

    def test_select_multikey
      @connection.execute "insert into hstores (tags) VALUES ('1=>2,2=>3')"
      x = Hstore.first
      assert_equal({'1' => '2', '2' => '3'}, x.tags)
    end

    def test_create
      assert_cycle('a' => 'b', '1' => '2')
    end

    def test_nil
      assert_cycle('a' => nil)
    end

    def test_quotes
      assert_cycle('a' => 'b"ar', '1"foo' => '2')
    end

    def test_whitespace
      assert_cycle('a b' => 'b ar', '1"foo' => '2')
    end

    def test_backslash
      assert_cycle('a\\b' => 'b\\ar', '1"foo' => '2')
    end

    def test_comma
      assert_cycle('a, b' => 'bar', '1"foo' => '2')
    end

    def test_arrow
      assert_cycle('a=>b' => 'bar', '1"foo' => '2')
    end

    def test_quoting_special_characters
      assert_cycle('ca' => 'cà', 'ac' => 'àc')
    end

    def test_multiline
      assert_cycle("a\nb" => "c\nd")
    end

    class TagCollection
      def initialize(hash); @hash = hash end
      def to_hash; @hash end
      def self.load(hash); new(hash) end
      def self.dump(object); object.to_hash end
    end

    class HstoreWithSerialize < Hstore
      serialize :tags, TagCollection
    end

    def test_hstore_with_serialized_attributes
      HstoreWithSerialize.create! tags: TagCollection.new({"one" => "two"})
      record = HstoreWithSerialize.first
      assert_instance_of TagCollection, record.tags
      assert_equal({"one" => "two"}, record.tags.to_hash)
      record.tags = TagCollection.new("three" => "four")
      record.save!
      assert_equal({"three" => "four"}, HstoreWithSerialize.first.tags.to_hash)
    end

    def test_clone_hstore_with_serialized_attributes
      HstoreWithSerialize.create! tags: TagCollection.new({"one" => "two"})
      record = HstoreWithSerialize.first
      dupe = record.dup
      assert_equal({"one" => "two"}, dupe.tags.to_hash)
    end

    def test_schema_dump_with_shorthand
      output = dump_table_schema("hstores")
      assert_match %r[t\.hstore "tags",\s+default: {}], output
    end

    private
    def assert_array_cycle(array)
      # test creation
      x = Hstore.create!(payload: array)
      x.reload
      assert_equal(array, x.payload)

      # test updating
      x = Hstore.create!(payload: [])
      x.payload = array
      x.save!
      x.reload
      assert_equal(array, x.payload)
    end

    def assert_cycle(hash)
      # test creation
      x = Hstore.create!(:tags => hash)
      x.reload
      assert_equal(hash, x.tags)

      # test updating
      x = Hstore.create!(:tags => {})
      x.tags = hash
      x.save!
      x.reload
      assert_equal(hash, x.tags)
    end
  end
end
