# frozen_string_literal: true

require "json"

module NeetoCompliance
  class PackageDependenciesVersionVerifier < Base
    def valid?
      @common_package_json = load_json_file(common_packages_latest_file)
      @project_package_json = load_json_file("package.json")

      @incorrect_dependencies = {
        dependencies: find_incorrect_dependencies(:dependencies),
        devDependencies: find_incorrect_dependencies(:devDependencies)
      }
      @incorrect_dependencies[:misplacedDependencies] = find_misplaced_dependencies
      @incorrect_dependencies.keys.all? { |key| @incorrect_dependencies[key].empty? }
    end

    def auto_correct!
    end

    def autofix_command
      command = ""
      command += "yarn remove #{@incorrect_dependencies[:misplacedDependencies]
        .join(" ")}\n" unless @incorrect_dependencies[:misplacedDependencies].empty?
      command += "yarn add #{@incorrect_dependencies[:dependencies]
        .join(" ")}\n" unless @incorrect_dependencies[:dependencies].empty?
      command += "yarn add -D #{@incorrect_dependencies[:devDependencies]
        .join(" ")}\n" unless @incorrect_dependencies[:devDependencies].empty?
      command
    end

    private

      def common_packages_latest_file
        NeetoCompliance::NeetoCommons.path.join "common_files/package-common.json"
      end

      def find_misplaced_dependencies
        project_dependencies = @project_package_json[:dependencies]
        @common_package_json[:devDependencies].inject([]) do |result, (package_name, latest_version)|
          next result unless project_dependencies.key?(package_name)

          @incorrect_dependencies[:devDependencies] |= ["\"#{package_name}@#{latest_version}\""]
          result.push("#{package_name}")
        end
      end

      def find_incorrect_dependencies(key)
        project_dependencies = @project_package_json[key]
        @common_package_json[key].inject([]) do |result, (package_name, latest_version)|
          next result if project_dependencies[package_name] == latest_version

          result.push("\"#{package_name}@#{latest_version}\"")
        end
      end

      def load_json_file(url)
        JSON.parse(open(url).read, symbolize_names: true)
      end
  end
end