require 'optparse'

module AnnotateRb
  # Class for handling command line arguments
  class Parser # rubocop:disable Metrics/ClassLength
    def self.parse(args, existing_options = {})
      new(args, existing_options).parse
    end

    BANNER_STRING = <<~BANNER.freeze
      Usage: annotaterb [command] [options]
      
      Commands:
          models [options]
          routes [options]
          help
          version
    BANNER

    DEFAULT_OPTIONS = {
      target_action: :do_annotations,
      exit: false
    }.freeze

    ANNOTATION_POSITIONS = %w[before top after bottom].freeze
    FILE_TYPE_POSITIONS = %w[position_in_class position_in_factory position_in_fixture position_in_test position_in_routes position_in_serializer].freeze
    EXCLUSION_LIST = %w[tests fixtures factories serializers].freeze
    FORMAT_TYPES = %w[bare rdoc yard markdown].freeze

    COMMAND_MAP = {
      'models' => :models,
      'routes' => :routes,
      'version' => :version,
      'help' => :help
    }.freeze

    def initialize(args, existing_options)
      @args = args
      base_options = DEFAULT_OPTIONS.dup
      @options = base_options.merge(existing_options)
      @commands = []
      @options[:original_args] = args.dup
    end

    def parse
      parse_command(@args)

      parser.parse!(@args)

      act_on_command

      @options
    end

    private

    def parse_command(args)
      command_arg = args.first
      command = COMMAND_MAP[command_arg]

      if command
        args.shift
        @commands << command
      end
    end

    def act_on_command
      map = {
        models: Commands::AnnotateModels.new,
        routes: Commands::AnnotateRoutes.new,
        help: Commands::PrintHelp.new(@parser),
        version: Commands::PrintVersion.new
      }

      if @commands.any?
        @options[:command] = map[@commands.first]
      elsif @commands.size > 1
        # TODO: Should raise or alert user that multiple commands were selected but only 1 command will be ran
        @options[:command] = map[@commands.first]
      else # None
        @options[:command] = nil
      end
    end

    def parser
      @parser ||= OptionParser.new do |option_parser|
        option_parser.banner = BANNER_STRING

        # ------------------------------------------------------------------------------------------------------------=
        option_parser.separator('')
        option_parser.separator('Options:')

        option_parser.on('-v', '--version', "Display the version..") do
          @commands << :version
        end

        option_parser.on('-h', '--help', "You're looking at it.") do
          @commands << :help
        end

        add_model_options_to_parser(option_parser)
        add_route_options_to_parser(option_parser)
        add_wrapper_options_to_parser(option_parser)
        add_options_to_parser(option_parser)
        add_position_options_to_parser(option_parser)
        add_utils_to_parser(option_parser)
      end
    end

    def add_wrapper_options_to_parser(option_parser)
      option_parser.on('--w',
                       '--wrapper STR',
                       'Wrap annotation with the text passed as parameter.',
                       'If --w option is used, the same text will be used as opening and closing') do |wrapper|
        @options[:wrapper] = wrapper
      end

      option_parser.on('--wo',
                       '--wrapper-open STR',
                       'Annotation wrapper opening.') do |wrapper_open|
        @options[:wrapper_open] = wrapper_open
      end

      option_parser.on('--wc',
                       '--wrapper-close STR',
                       'Annotation wrapper closing') do |wrapper_close|
        @options[:wrapper_close] = wrapper_close
      end
    end

    def add_utils_to_parser(option_parser)
      option_parser.on('--force',
                       'Force new annotations even if there are no changes.') do
        @options[:force] = true
      end

      option_parser.on('--debug',
                       'Prints the options and outputs messages to make it easier to debug.') do
        @options[:debug] = true
      end

      option_parser.on('--frozen',
                       'Do not allow to change annotations. Exits non-zero if there are going to be changes to files.') do
        @options[:frozen] = true
      end

      option_parser.on('--trace',
                       'If unable to annotate a file, print the full stack trace, not just the exception message.') do
        @options[:trace] = true
      end
    end

    def add_model_options_to_parser(option_parser)
      option_parser.separator('')
      option_parser.separator('Annotate model options:')
      option_parser.separator(' ' * 4 + 'Usage: annotaterb models [options]')
      option_parser.separator('')

      # option_parser.on('-m',
      #                  '--models',
      #                  "Annotate ActiveRecord models") do
      #   @options[:models] = true
      #   @options[:command] = Commands::AnnotateModels.new
      # end

      option_parser.on('-a',
                       '--active-admin',
                       'Annotate active_admin models') do
        @options[:active_admin] = true
      end

      option_parser.on('--show-migration',
                       'Include the migration version number in the annotation') do
        @options[:include_version] = true
      end

      option_parser.on('-k',
                       '--show-foreign-keys',
                       "List the table's foreign key constraints in the annotation") do
        @options[:show_foreign_keys] = true
      end

      option_parser.on('--ck',
                       '--complete-foreign-keys',
                       'Complete foreign key names in the annotation') do
        @options[:show_foreign_keys] = true
        @options[:show_complete_foreign_keys] = true
      end

      option_parser.on('-i',
                       '--show-indexes',
                       "List the table's database indexes in the annotation") do
        @options[:show_indexes] = true
      end

      option_parser.on('-s',
                       '--simple-indexes',
                       "Concat the column's related indexes in the annotation") do
        @options[:simple_indexes] = true
      end

      option_parser.on('--hide-limit-column-types VALUES',
                       "don't show limit for given column types, separated by commas (i.e., `integer,boolean,text`)") do |values|
        @options[:hide_limit_column_types] = values.to_s
      end

      option_parser.on('--hide-default-column-types VALUES',
                       "don't show default for given column types, separated by commas (i.e., `json,jsonb,hstore`)") do |values|
        @options[:hide_default_column_types] = values.to_s
      end

      option_parser.on('--ignore-unknown-models',
                       "don't display warnings for bad model files") do
        @options[:ignore_unknown_models] = true
      end

      option_parser.on('-I',
                       '--ignore-columns REGEX',
                       "don't annotate columns that match a given REGEX (i.e., `annotate -I '^(id|updated_at|created_at)'`") do |regex|
        @options[:ignore_columns] = regex
      end

      option_parser.on('--with-comment',
                       "include database comments in model annotations") do
        @options[:with_comment] = true
      end
    end

    def add_route_options_to_parser(option_parser)
      option_parser.separator('')
      option_parser.separator('Annotate routes options:')
      option_parser.separator(' ' * 4 + 'Usage: annotaterb routes [options]')
      option_parser.separator('')

      # option_parser.on('-r',
      #                  '--routes',
      #                  "Annotate routes.rb with the output of 'rails routes'") do
      #   @options[:routes] = true
      #   @options[:command] = Commands::AnnotateRoutes.new
      # end

      option_parser.on('--ignore-routes REGEX',
                       "don't annotate routes that match a given REGEX (i.e., `annotate -I '(mobile|resque|pghero)'`") do |regex|
        @options[:ignore_routes] = regex
      end

      option_parser.on('--timestamp',
                       'Include timestamp in (routes) annotation') do
        @options[:timestamp] = true
      end
    end

    def add_position_options_to_parser(option_parser)
      has_set_position = {}

      option_parser.on('-p',
                       '--position [before|top|after|bottom]',
                       ANNOTATION_POSITIONS,
                       'Place the annotations at the top (before) or the bottom (after) of the model/test/fixture/factory/route/serializer file(s)') do |position|
        @options[:position] = position

        FILE_TYPE_POSITIONS.each do |key|
          @options[key.to_sym] = position unless has_set_position[key]
        end
      end

      option_parser.on('--pc',
                       '--position-in-class [before|top|after|bottom]',
                       ANNOTATION_POSITIONS,
                       'Place the annotations at the top (before) or the bottom (after) of the model file') do |position_in_class|
        @options[:position_in_class] = position_in_class
        has_set_position['position_in_class'] = true
      end

      option_parser.on('--pf',
                       '--position-in-factory [before|top|after|bottom]',
                       ANNOTATION_POSITIONS,
                       'Place the annotations at the top (before) or the bottom (after) of any factory files') do |position_in_factory|
        @options[:position_in_factory] = position_in_factory
        has_set_position['position_in_factory'] = true
      end

      option_parser.on('--px',
                       '--position-in-fixture [before|top|after|bottom]',
                       ANNOTATION_POSITIONS,
                       'Place the annotations at the top (before) or the bottom (after) of any fixture files') do |position_in_fixture|
        @options[:position_in_fixture] = position_in_fixture
        has_set_position['position_in_fixture'] = true
      end

      option_parser.on('--pt',
                       '--position-in-test [before|top|after|bottom]',
                       ANNOTATION_POSITIONS,
                       'Place the annotations at the top (before) or the bottom (after) of any test files') do |position_in_test|
        @options[:position_in_test] = position_in_test
        has_set_position['position_in_test'] = true
      end

      option_parser.on('--pr',
                       '--position-in-routes [before|top|after|bottom]',
                       ANNOTATION_POSITIONS,
                       'Place the annotations at the top (before) or the bottom (after) of the routes.rb file') do |position_in_routes|
        @options[:position_in_routes] = position_in_routes
        has_set_position['position_in_routes'] = true
      end

      option_parser.on('--ps',
                       '--position-in-serializer [before|top|after|bottom]',
                       ANNOTATION_POSITIONS,
                       'Place the annotations at the top (before) or the bottom (after) of the serializer files') do |position_in_serializer|
        @options[:position_in_serializer] = position_in_serializer
        has_set_position['position_in_serializer'] = true
      end
    end

    def add_options_to_parser(option_parser) # rubocop:disable Metrics/MethodLength
      option_parser.separator('')
      option_parser.separator('Command options:')
      option_parser.separator('Additional options that work for annotating models and routes')
      option_parser.separator('')

      option_parser.on('--additional-file-patterns path1,path2,path3',
                       Array,
                       "Additional file paths or globs to annotate, separated by commas (e.g. `/foo/bar/%model_name%/*.rb,/baz/%model_name%.rb`)") do |additional_file_patterns|
        @options[:additional_file_patterns] = additional_file_patterns
      end

      option_parser.on('-d',
                       '--delete',
                       'Remove annotations from all model files or the routes.rb file') do
        @options[:target_action] = :remove_annotations
      end

      option_parser.on('--model-dir dir',
                       "Annotate model files stored in dir rather than app/models, separate multiple dirs with commas") do |dir|
        @options[:model_dir] = dir
      end

      option_parser.on('--root-dir dir',
                       "Annotate files stored within root dir projects, separate multiple dirs with commas") do |dir|
        @options[:root_dir] = dir
      end

      option_parser.on('--ignore-model-subdirects',
                       "Ignore subdirectories of the models directory") do
        @options[:ignore_model_sub_dir] = true
      end

      option_parser.on('--sort',
                       "Sort columns alphabetically, rather than in creation order") do
        @options[:sort] = true
      end

      option_parser.on('--classified-sort',
                       "Sort columns alphabetically, but first goes id, then the rest columns, then the timestamp columns and then the association columns") do
        @options[:classified_sort] = true
      end

      option_parser.on('-R',
                       '--require path',
                       "Additional file to require before loading models, may be used multiple times") do |path|
        @options[:require] = if @options[:require].present?
                           [@options[:require], path].join(',')
                         else
                           path
                         end
      end

      option_parser.on('-e',
                       '--exclude [tests,fixtures,factories,serializers]',
                       Array,
                       "Do not annotate fixtures, test files, factories, and/or serializers") do |exclusions|
        exclusions ||= EXCLUSION_LIST
        exclusions.each { |exclusion| @options["exclude_#{exclusion}".to_sym] = true }
      end

      option_parser.on('-f',
                       '--format [bare|rdoc|yard|markdown]',
                       FORMAT_TYPES,
                       'Render Schema Information as plain/RDoc/Yard/Markdown') do |format_type|
        @options["format_#{format_type}".to_sym] = true
      end
    end
  end
end