enum OpenAIMode
  Chat
  Complete
  Insert

  def self.from_s(str_mode)
    return OpenAIMode.values.find do |openai_mode|
      openai_mode.to_s.downcase == str_mode.downcase
    end
  end
end

class GptConfig
  # defaults
  property gpt_temperature = 0.82
  property gpt_presence_penalty = 1
  property gpt_frequency_penalty = 1
  property gpt_max_tokens = 256
  property gpt_mode = OpenAIMode::Chat
end

class AppConfig
  property input_file = STDIN
  property input_file_path = ""
  property output_file = STDOUT
  property output_file_path = ""
  property past_characters_limit = 1000
  property use_color = true
  property make_request = true
  property verbose = false
  property gpt_config = GptConfig.new
end

class Storyteller
  property config = AppConfig.new

  def initialize()
  end

  def prepare()
    self._parse_config()
    self._parse_command_line(ARGV)
  end

  private def _parse_config() 
  end

  private def _parse_command_line(args)
    parser = OptionParser.new do |parser|
      parser.banner = "Usage: storyteller [options]"

      parser.separator("Options:")

      parser.on("-i FILE", "--input=FILE", "Path to input file") do |file|
        @config.input_file_path = file
      end

      parser.on("-h", "--help", "Show this help") do
        puts parser
        exit
      end

      parser.on("-n", "--no-color", "Disable color output") do
        @config.use_color = false
      end

      parser.on("-o FILE", "--output=FILE", "Path to output file") do |file|
        @config.use_color = false
        @config.output_file_path = file
      end

      parser.on("-v", "--verbose", "Be verbose (cumulative)") do
        @config.verbose = true
      end

      parser.on("--dry-run", "Don't call the API") do
        @config.make_request = false
      end

      parser.separator("GPT options")

      parser.on("--gpt-mode MODE", "GPT mode (chat,insert,complete) (default: chat)") do |chosen_mode|
        result_mode = OpenAIMode.from_s(chosen_mode.downcase)
        if result_mode.nil?
          STDERR.puts "ERROR: unknown mode #{chosen_mode}"
          exit 1
        end
        gpt_mode = result_mode unless result_mode.nil?
      end

      parser.on("--gpt-temperature TEMPERATURE", "GPT Temperature") do |temperature|
        gpt_temperature = temperature
      end
      parser.on("--gpt-presence-penalty PENALTY", "GPT Presence Penalty") do |presence_penalty|
        gpt_presence_penalty = presence_penalty
      end
      parser.on("--gpt-frequency-penalty PENALTY", "GPT Frequency Penalty") do |frequency_penalty|
        gpt_frequency_penalty = frequency_penalty
      end
      parser.on("--gpt-max-tokens TOKENS", "GPT Max Tokens") do |max_tokens|
        gpt_max_tokens = max_tokens
      end

    end
    parser.parse(args)
  end

  def load_file()
    # Read file and initialize zones
    if !@config.input_file_path.empty?
      # puts "d: Using input file #{input_file_path}"
      @config.input_file = File.open(@config.input_file_path)
    end
    prompt = self.read_file(@config.input_file)
    @config.input_file.close
    prompt
  end

  def run()
    original_prompt = self.load_file()

    # Build GPT-3 request
    prompt = self.complete(original_prompt, @config.make_request, @config.verbose)
    pp prompt if @config.verbose
    exit 0 if !@config.make_request

    if !@config.output_file_path.empty?
      # puts "d: Using output file #{input_file_path}"
      @config.output_file = File.open(@config.output_file_path, "w")
    end
    self.write_file(@config.output_file, prompt, @config.use_color)
    @config.output_file.close

    # rescue ex : OptionParser::InvalidOption
    #   STDERR.puts @parser
    #   STDERR.puts "\nERROR: #{ex.message}"
    #   exit 1

    # rescue ex: OpenAI::Client::ClientError
    #   STDERR.puts "ERROR: #{ex.message}"
    #   exit 1
  end

  def complete(prompt : Prompt, make_request : Bool, verbose : Bool)
    builder = Builder::OpenAIChat.new(verbose: verbose)
    messages = builder.build(prompt)

    STDERR.puts messages if verbose

    return prompt if !make_request

    channel_ready = Channel(Bool).new
    channel_tick = Channel(Bool).new
    # sp = Spin.new(0.5, Spinner::Charset[:progress])

    spawn do
      tick = 0
      loop do
        tick += 1
        print "."
        if tick > (3 * 60)
          print "(timeout)"
          exit 1
        end
        # channel_tick.send(true) 
        sleep 1.seconds
      end
    end

    spawn do
      openai = OpenAI::Client.new(access_token: ENV.fetch("OPENAI_API_KEY"))
      result = openai.chat(
        "gpt-3.5-turbo", 
        messages,
        {
        "temperature" => 0.82,
        "presence_penalty" => 1,
        "frequency_penalty" => 1,
        "max_tokens" => 256
      }
      )
      prompt.present_zone.content << result.choices.first["message"]["content"]
      channel_ready.send(true)
    end

    # sp.start
    channel_ready.receive
    channel_ready.close
    # sp.stop

    prompt
  end

  def read_file(input_file : IO::FileDescriptor)
    content = input_file.gets_to_end

    # puts "d: building parser"
    parser = Parser::PromptString.new
    # puts "d: parsing"
    prompt = parser.parse(content)
    # pp prompt
  end

  def write_file(output_file : IO::FileDescriptor, prompt : Prompt, use_color : Bool)
    # STDERR.puts "d: building builder"
    builder = Builder::PromptString.new(use_color)
    # STDERR.puts "d: building"
    text = builder.build(prompt)
    output_file.write_string(text.to_slice)
  end

  def display_completion(completion : String)
    # Code pour afficher la complétion
  end
end