require 'json'

module Ree
  module CLI
    class IndexFile
      class << self
        def run(file_path:, project_path:)
          ENV['REE_SKIP_ENV_VARS_CHECK'] = 'true'

          path = Ree.locate_packages_schema(project_path)
          dir = Pathname.new(path).dirname.to_s

          Ree.init(dir)

          file_path = File.join(dir, file_path)

          current_package_schema = self.find_package(File.dirname(file_path))

          return {} unless current_package_schema

          package_schema = JSON.load_file(current_package_schema)
          current_package_name = package_schema["name"].to_sym

          facade = Ree.container.packages_facade
          Ree.load_package(current_package_name)

          package = facade.get_package(current_package_name)
          objects_class_names = package.objects.map(&:class_name)
          file_name_const_string = Ree::StringUtils.camelize(file_path.split('/')[-1].split('.rb')[0])
          const_string_with_module = "#{package.module}::#{file_name_const_string}"

          return {} if objects_class_names.include?(const_string_with_module) # skip objects

          klass = Object.const_get(const_string_with_module)

          methods = klass
            .public_instance_methods(false)
            .reject { _1.match?(/original/) } # remove aliases defined by contracts
            .map {
              {
                name: _1,
                location: klass.public_instance_method(_1).source_location&.last,
              }
            }

          hsh = {
            path: file_path,
            package: current_package_name,
            methods: methods
          }

          JSON.pretty_generate({ file_name_const_string => hsh })
        end

        def find_package(dir)
          package_schema = File.join(dir, Ree::PACKAGE_SCHEMA_FILE)

          if File.exist?(package_schema)
            return package_schema
          end

          if dir == '/'
            return nil
          end

          find_package(File.expand_path('..', dir))
        end
      end
    end
  end
end