class Lookbook::Preview

def all
  previews = ViewComponent::Preview.all.map { |p| new(p) }
  sorted_previews = previews.sort_by { |preview| [preview.position, preview.label] }
  PreviewCollection.new(sorted_previews)
end

def default_example
  examples.first
end

def display_params
  Lookbook.config.preview_display_params.deep_merge(@preview_inspector&.display_params)
end

def example(example_name)
  examples.find { |m| m.name == example_name.to_s }
end

def examples
  return @examples if @examples.present?
  public_methods = @preview.public_instance_methods(false)
  public_method_objects = @preview_inspector&.methods&.filter { |m| public_methods.include?(m.name) }
  examples = public_method_objects&.map { |m| PreviewExample.new(m.name.to_s, self) }
  sorted = Lookbook.config.sort_examples ? examples.sort_by(&:label) : examples
  @examples = []
  if @preview_inspector&.groups&.any?
    sorted.group_by { |m| m.group }.each do |name, examples|
      if name.nil?
        @examples += examples
      else
        name = label if name.strip == ""
        @examples << PreviewGroup.new(name.underscore, self, examples)
      end
    end
  else
    @examples = sorted
  end
  @examples
end

def exists?(path)
  !!find(path)
end

def find(path)
  all.find { |p| p.lookup_path == path }
end

def full_path
  base_path = Array(preview_paths).detect do |preview_path|
    Dir["#{preview_path}/#{name.underscore}.rb"].first
  end
  Pathname.new(Dir["#{base_path}/#{name.underscore}.rb"].first)
end

def hierarchy_depth
  path.split("/").size
end

def id
  @preview_inspector&.id || generate_id(lookup_path)
end

def initialize(preview)
  @preview = preview
  @preview_inspector = CodeInspector.new(@preview.name)
end

def label
  @preview_inspector&.label&.presence || lookup_path.split("/").last.titleize
end

def layout
  @preview.instance_variable_get(:@layout)
end

def parent_collections_names
  File.dirname(path).split("/")
end

def path
  preview_class_name(preview_class_basename(name))
end

def preview_class
  @preview.name
end

def preview_paths
  ViewComponent::Preview.preview_paths
end

def type
  :preview
end