# frozen_string_literal: true

# Here we are reopening the prism module to provide methods on nodes that aren't
# templated and are meant as convenience methods.
module Prism
  module RegularExpressionOptions # :nodoc:
    # Returns a numeric value that represents the flags that were used to create
    # the regular expression.
    def options
      o = flags & (RegularExpressionFlags::IGNORE_CASE | RegularExpressionFlags::EXTENDED | RegularExpressionFlags::MULTI_LINE)
      o |= Regexp::FIXEDENCODING if flags.anybits?(RegularExpressionFlags::EUC_JP | RegularExpressionFlags::WINDOWS_31J | RegularExpressionFlags::UTF_8)
      o |= Regexp::NOENCODING if flags.anybits?(RegularExpressionFlags::ASCII_8BIT)
      o
    end
  end

  private_constant :RegularExpressionOptions

  class FloatNode < Node
    # Returns the value of the node as a Ruby Float.
    def value
      Float(slice)
    end
  end

  class ImaginaryNode < Node
    # Returns the value of the node as a Ruby Complex.
    def value
      Complex(0, numeric.value)
    end
  end

  class IntegerNode < Node
    # Returns the value of the node as a Ruby Integer.
    def value
      Integer(slice)
    end
  end

  class InterpolatedMatchLastLineNode < Node
    include RegularExpressionOptions
  end

  class InterpolatedRegularExpressionNode < Node
    include RegularExpressionOptions
  end

  class MatchLastLineNode < Node
    include RegularExpressionOptions
  end

  class RationalNode < Node
    # Returns the value of the node as a Ruby Rational.
    def value
      Rational(slice.chomp("r"))
    end
  end

  class RegularExpressionNode < Node
    include RegularExpressionOptions
  end

  class ConstantReadNode < Node
    # Returns the list of parts for the full name of this constant. For example: [:Foo]
    def full_name_parts
      [name]
    end

    # Returns the full name of this constant. For example: "Foo"
    def full_name
      name.name
    end
  end

  class ConstantPathNode < Node
    # Returns the list of parts for the full name of this constant path. For example: [:Foo, :Bar]
    def full_name_parts
      parts = [child.name]
      current = parent

      while current.is_a?(ConstantPathNode)
        parts.unshift(current.child.name)
        current = current.parent
      end

      parts.unshift(current&.name || :"")
    end

    # Returns the full name of this constant path. For example: "Foo::Bar"
    def full_name
      full_name_parts.join("::")
    end
  end

  class ConstantPathTargetNode < Node
    # Returns the list of parts for the full name of this constant path. For example: [:Foo, :Bar]
    def full_name_parts
      (parent&.full_name_parts || [:""]).push(child.name)
    end

    # Returns the full name of this constant path. For example: "Foo::Bar"
    def full_name
      full_name_parts.join("::")
    end
  end
end