# frozen_string_literal: true

module Arel # :nodoc: all
  module Predications
    def not_eq(other)
      Nodes::NotEqual.new self, quoted_node(other)
    end

    def not_eq_any(others)
      grouping_any :not_eq, others
    end

    def not_eq_all(others)
      grouping_all :not_eq, others
    end

    def eq(other)
      Nodes::Equality.new self, quoted_node(other)
    end

    def is_not_distinct_from(other)
      Nodes::IsNotDistinctFrom.new self, quoted_node(other)
    end

    def is_distinct_from(other)
      Nodes::IsDistinctFrom.new self, quoted_node(other)
    end

    def eq_any(others)
      grouping_any :eq, others
    end

    def eq_all(others)
      grouping_all :eq, quoted_array(others)
    end

    def between(other)
      if unboundable?(other.begin) == 1 || unboundable?(other.end) == -1
        self.in([])
      elsif open_ended?(other.begin)
        if open_ended?(other.end)
          if infinity?(other.begin) == 1 || infinity?(other.end) == -1
            self.in([])
          else
            not_in([])
          end
        elsif other.exclude_end?
          lt(other.end)
        else
          lteq(other.end)
        end
      elsif open_ended?(other.end)
        gteq(other.begin)
      elsif other.exclude_end?
        gteq(other.begin).and(lt(other.end))
      elsif other.begin == other.end
        eq(other.begin)
      else
        left = quoted_node(other.begin)
        right = quoted_node(other.end)
        Nodes::Between.new(self, Nodes::And.new([left, right]))
      end
    end

    def in(other)
      case other
      when Arel::SelectManager
        Arel::Nodes::In.new(self, other.ast)
      when Enumerable
        Nodes::In.new self, quoted_array(other)
      else
        Nodes::In.new self, quoted_node(other)
      end
    end

    def in_any(others)
      grouping_any :in, others
    end

    def in_all(others)
      grouping_all :in, others
    end

    def not_between(other)
      if unboundable?(other.begin) == 1 || unboundable?(other.end) == -1
        not_in([])
      elsif open_ended?(other.begin)
        if open_ended?(other.end)
          if infinity?(other.begin) == 1 || infinity?(other.end) == -1
            not_in([])
          else
            self.in([])
          end
        elsif other.exclude_end?
          gteq(other.end)
        else
          gt(other.end)
        end
      elsif open_ended?(other.end)
        lt(other.begin)
      else
        left = lt(other.begin)
        right = if other.exclude_end?
          gteq(other.end)
        else
          gt(other.end)
        end
        left.or(right)
      end
    end

    def not_in(other)
      case other
      when Arel::SelectManager
        Arel::Nodes::NotIn.new(self, other.ast)
      when Enumerable
        Nodes::NotIn.new self, quoted_array(other)
      else
        Nodes::NotIn.new self, quoted_node(other)
      end
    end

    def not_in_any(others)
      grouping_any :not_in, others
    end

    def not_in_all(others)
      grouping_all :not_in, others
    end

    def matches(other, escape = nil, case_sensitive = false)
      Nodes::Matches.new self, quoted_node(other), escape, case_sensitive
    end

    def matches_regexp(other, case_sensitive = true)
      Nodes::Regexp.new self, quoted_node(other), case_sensitive
    end

    def matches_any(others, escape = nil, case_sensitive = false)
      grouping_any :matches, others, escape, case_sensitive
    end

    def matches_all(others, escape = nil, case_sensitive = false)
      grouping_all :matches, others, escape, case_sensitive
    end

    def does_not_match(other, escape = nil, case_sensitive = false)
      Nodes::DoesNotMatch.new self, quoted_node(other), escape, case_sensitive
    end

    def does_not_match_regexp(other, case_sensitive = true)
      Nodes::NotRegexp.new self, quoted_node(other), case_sensitive
    end

    def does_not_match_any(others, escape = nil)
      grouping_any :does_not_match, others, escape
    end

    def does_not_match_all(others, escape = nil)
      grouping_all :does_not_match, others, escape
    end

    def gteq(right)
      Nodes::GreaterThanOrEqual.new self, quoted_node(right)
    end

    def gteq_any(others)
      grouping_any :gteq, others
    end

    def gteq_all(others)
      grouping_all :gteq, others
    end

    def gt(right)
      Nodes::GreaterThan.new self, quoted_node(right)
    end

    def gt_any(others)
      grouping_any :gt, others
    end

    def gt_all(others)
      grouping_all :gt, others
    end

    def lt(right)
      Nodes::LessThan.new self, quoted_node(right)
    end

    def lt_any(others)
      grouping_any :lt, others
    end

    def lt_all(others)
      grouping_all :lt, others
    end

    def lteq(right)
      Nodes::LessThanOrEqual.new self, quoted_node(right)
    end

    def lteq_any(others)
      grouping_any :lteq, others
    end

    def lteq_all(others)
      grouping_all :lteq, others
    end

    def when(right)
      Nodes::Case.new(self).when quoted_node(right)
    end

    def concat(other)
      Nodes::Concat.new self, other
    end

    def contains(other)
      Arel::Nodes::Contains.new self, quoted_node(other)
    end

    def overlaps(other)
      Arel::Nodes::Overlaps.new self, quoted_node(other)
    end

    def quoted_array(others)
      others.map { |v| quoted_node(v) }
    end

    private
      def grouping_any(method_id, others, *extras)
        nodes = others.map { |expr| send(method_id, expr, *extras) }
        Nodes::Grouping.new nodes.inject { |memo, node|
          Nodes::Or.new([memo, node])
        }
      end

      def grouping_all(method_id, others, *extras)
        nodes = others.map { |expr| send(method_id, expr, *extras) }
        Nodes::Grouping.new Nodes::And.new(nodes)
      end

      def quoted_node(other)
        Nodes.build_quoted(other, self)
      end

      def infinity?(value)
        value.respond_to?(:infinite?) && value.infinite?
      end

      def unboundable?(value)
        value.respond_to?(:unboundable?) && value.unboundable?
      end

      def open_ended?(value)
        value.nil? || infinity?(value) || unboundable?(value)
      end
  end
end
