module Whisper
  interface _Samples
    def length: () -> Integer
    def each: { (Float) -> void } -> void
  end

  type log_callback = ^(Integer level, String message, Object user_data) -> void
  type new_segment_callback = ^(Whisper::Context, untyped, Integer n_new, Object user_data) -> void
  type progress_callback = ^(Whisper::Context, untyped, Integer progress, Object user_data) -> void
  type encoder_begin_callback = ^(Whisper::Context, untyped, Object user_data) -> void
  type abort_callback = ^(Whisper::Context, untyped, Object user_data) -> boolish

  VERSION: String
  LOG_LEVEL_NONE: Integer
  LOG_LEVEL_INFO: Integer
  LOG_LEVEL_WARN: Integer
  LOG_LEVEL_ERROR: Integer
  LOG_LEVEL_DEBUG: Integer
  LOG_LEVEL_CONT: Integer
  AHEADS_NONE: Integer
  AHEADS_N_TOP_MOST: Integer
  AHEADS_CUSTOM: Integer
  AHEADS_TINY_EN: Integer
  AHEADS_TINY: Integer
  AHEADS_BASE_EN: Integer
  AHEADS_BASE: Integer
  AHEADS_SMALL_EN: Integer
  AHEADS_SMALL: Integer
  AHEADS_MEDIUM_EN: Integer
  AHEADS_MEDIUM: Integer
  AHEADS_LARGE_V1: Integer
  AHEADS_LARGE_V2: Integer
  AHEADS_LARGE_V3: Integer
  AHEADS_LARGE_V3_TURBO: Integer

  def self.lang_max_id: () -> Integer
  def self.lang_id: (string name) -> Integer
  def self.lang_str: (Integer id) -> String
  def self.lang_str_full: (Integer id) -> String
  def self.log_set: (log_callback?, Object? user_data) -> log_callback
  def self.system_info_str: () -> String

  module Output
    module Context
      def to_srt: () -> String
      def to_webvtt: () -> String
    end

    module Segment
      def to_srt_cue: () -> String
      def to_webvtt_cue: () -> String
    end
  end

  class Context
    include Output::Context

    def self.new: (String | path | ::URI::HTTP) -> instance

    # transcribe a single file
    # can emit to a block results
    #
    #     params = Whisper::Params.new
    #     params.duration = 60_000
    #     whisper.transcribe "path/to/audio.wav", params do |text|
    #       puts text
    #     end
    #
    # If `n_processors` is greater than 1, you cannot set any callbacks including
    # new_segment_callback, progress_callback, encoder_begin_callback, abort_callback,
    # and log_callback set by Whisper.log_set
    def transcribe: (path, Whisper::Params, ?n_processors: Integer) -> self
                  | (path, Whisper::Params, ?n_processors: Integer) { (String) -> void } -> self

    def model_n_vocab: () -> Integer
    def model_n_audio_ctx: () -> Integer
    def model_n_audio_state: () -> Integer
    def model_n_text_head: () -> Integer
    def model_n_text_layer: () -> Integer
    def model_n_mels: () -> Integer
    def model_ftype: () -> Integer
    def model_type: () -> String

    # Yields each Whisper::Segment:
    #
    #     whisper.transcribe("path/to/audio.wav", params)
    #     whisper.each_segment do |segment|
    #       puts segment.text
    #     end
    #
    # Returns an `Enumerator` if no block given:
    #
    #     whisper.transcribe("path/to/audio.wav", params)
    #     enum = whisper.each_segment
    #     enum.to_a # => [#<Whisper::Segment>, ...]
    #
    def each_segment: { (Segment) -> void } -> void
                    | () -> Enumerator[Segment]

    def model: () -> Model
    def full_get_segment: (Integer nth) -> Segment
    def full_n_segments: () -> Integer

    # Language ID, which can be converted to string by Whisper.lang_str and Whisper.lang_str_full.
    #
    def full_lang_id: () -> Integer

    # Start time of a segment indexed by `segment_index` in centiseconds (10 times milliseconds).
    #
    #     full_get_segment_t0(3) # => 1668 (16680 ms)
    #
    def full_get_segment_t0: (Integer) -> Integer

    # End time of a segment indexed by `segment_index` in centiseconds (10 times milliseconds).
    #
    #     full_get_segment_t1(3) # => 1668 (16680 ms)
    #
    def full_get_segment_t1: (Integer) -> Integer

    # Whether the next segment indexed by `segment_index` is predicated as a speaker turn.
    #
    #     full_get_segment_speacker_turn_next(3) # => true
    #
    def full_get_segment_speaker_turn_next: (Integer) -> (true | false)

    # Text of a segment indexed by `segment_index`.
    #
    #     full_get_segment_text(3) # => "ask not what your country can do for you, ..."
    #
    def full_get_segment_text: (Integer) -> String

    def full_get_segment_no_speech_prob: (Integer) -> Float

    # Run the entire model: PCM -> log mel spectrogram -> encoder -> decoder -> text  
    # Not thread safe for same context  
    # Uses the specified decoding strategy to obtain the text.
    #
    # The second argument `samples` must be an array of samples, respond to `:length`, or be a MemoryView of an array of float. It must be 32 bit float PCM audio data.
    #
    def full: (Whisper::Params, Array[Float] samples, ?Integer n_samples) -> self
            | (Whisper::Params, _Samples, ?Integer n_samples) -> self

    # Split the input audio in chunks and process each chunk separately using `whisper_full_with_state()`  
    # Result is stored in the default state of the context  
    # Not thread safe if executed in parallel on the same context.  
    # It seems this approach can offer some speedup in some cases.  
    # However, the transcription accuracy can be worse at the beginning and end of each chunk.
    #
    # If `n_processors` is greater than 1, you cannot set any callbacks including
    # new_segment_callback, progress_callback, encoder_begin_callback, abort_callback,
    # and log_callback set by Whisper.log_set
    def full_parallel: (Whisper::Params, Array[Float], ?Integer n_samples) -> self
                     | (Whisper::Params, _Samples, ?Integer n_samples) -> self
                     | (Whisper::Params, _Samples, ?Integer? n_samples, Integer n_processors) -> self

    class Params
      def self.new: (
        ?use_gpu: boolish,
        ?flash_attn: boolish,
        ?gpu_device: Integer,
        ?dtw_token_timestamps: boolish,
        ?dtw_aheads_preset: Integer,
        ?dtw_n_top: Integer | nil,
      ) -> instance

      def use_gpu=: (boolish) -> boolish
      def use_gpu: () -> (true | false)
      def flash_attn=: (boolish) -> boolish
      def flash_attn: () -> (true | false)
      def gpu_device=: (Integer) -> Integer
      def gpu_device: () -> Integer
      def dtw_token_timestamps=: (boolish) -> boolish
      def dtw_token_timestamps: () -> (true | false)
      def dtw_aheads_preset=: (Integer) -> Integer
      def dtw_aheads_preset: () -> Integer
      def dtw_n_top=: (Integer | nil) -> (Integer | nil)
      def dtw_n_top: () -> (Integer | nil)
    end
  end

  class Params
    def self.new: (
      ?language: string,
      ?translate: boolish,
      ?no_context: boolish,
      ?single_segment: boolish,
      ?print_special: boolish,
      ?print_progress: boolish,
      ?print_realtime: boolish,
      ?print_timestamps: boolish,
      ?suppress_blank: boolish,
      ?suppress_nst: boolish,
      ?token_timestamps: boolish,
      ?max_len: Integer,
      ?split_on_word: boolish,
      ?initial_prompt: string | nil,
      ?carry_initial_prompt: boolish,
      ?diarize: boolish,
      ?offset: Integer,
      ?duration: Integer,
      ?max_text_tokens: Integer,
      ?temperature: Float,
      ?max_initial_ts: Float,
      ?length_penalty: Float,
      ?temperature_inc: Float,
      ?entropy_thold: Float,
      ?logprob_thold: Float,
      ?no_speech_thold: Float,
      ?new_segment_callback: new_segment_callback,
      ?new_segment_callback_user_data: Object,
      ?progress_callback: progress_callback,
      ?progress_callback_user_data: Object,
      ?encoder_begin_callback: encoder_begin_callback,
      ?encoder_begin_callback_user_data: Object,
      ?abort_callback: abort_callback,
      ?abort_callback_user_data: Object,
      ?vad: boolish,
      ?vad_model_path: path | URI,
      ?vad_params: Whisper::VAD::Params
    ) -> instance

    # params.language = "auto" | "en", etc...
    #
    def language=: (String) -> String # TODO: Enumerate lang names

    def language: () -> String
    def translate=: (boolish) -> boolish
    def translate: () -> (true | false)
    def no_context=: (boolish) -> boolish

    # If `true`, does not use past transcription (if any) as initial prompt for the decoder.
    #
    def no_context: () -> (true | false)

    def single_segment=: (boolish) -> boolish

    # If `true`, forces single segment output (useful for streaming).
    #
    def single_segment: () -> (true | false)

    def print_special=: (boolish) -> boolish

    # If `true`, prints special tokens (e.g. <SOT>, <EOT>, <BEG>, etc.).
    #
    def print_special: () -> (true | false)

    def print_progress=: (boolish) -> boolish

    # If `true`, prints progress information.
    #
    def print_progress: () -> (true | false)

    def print_realtime=: (boolish) -> boolish

    # If `true`, prints results from within whisper.cpp. (avoid it, use callback instead)
    #
    def print_realtime: () -> (true | false)

    # If `true`, prints timestamps for each text segment when printing realtime.
    #
    def print_timestamps=: (boolish) -> boolish

    def print_timestamps: () -> (true | false)

    def suppress_blank=: (boolish) -> boolish

    # If `true`, suppresses blank outputs.
    #
    def suppress_blank: () -> (true | false)

    def suppress_nst=: (boolish) -> boolish

    # If `true`, suppresses non-speech-tokens.
    #
    def suppress_nst: () -> (true | false)

    def token_timestamps=: (boolish) -> boolish

    # If `true`, enables token-level timestamps.
    #
    def token_timestamps: () -> (true | false)

    def max_len=: (Integer) -> Integer

    # max segment length in characters.
    #
    def max_len: () -> Integer

    def split_on_word=: (boolish) -> boolish

    # If `true`, split on word rather than on token (when used with max_len).
    #
    def split_on_word: () -> (true | false)

    def initial_prompt=: (_ToS) -> _ToS
    def carry_initial_prompt=: (boolish) -> boolish

    # Tokens to provide to the whisper decoder as initial prompt  
    # these are prepended to any existing text context from a previous call  
    # use whisper_tokenize() to convert text to tokens.  
    # Maximum of whisper_n_text_ctx()/2 tokens are used (typically 224).
    #
    def initial_prompt: () -> (String | nil)
    def carry_initial_prompt: () -> (true | false)

    def diarize=: (boolish) -> boolish

    # If `true`, enables diarization.
    #
    def diarize: () -> (true | false)

    def offset=: (Integer) -> Integer

    # Start offset in ms.
    #
    def offset: () -> Integer

    def duration=: (Integer) -> Integer

    # Audio duration to process in ms.
    #
    def duration: () -> Integer

    def max_text_tokens=: (Integer) -> Integer

    # Max tokens to use from past text as prompt for the decoder.
    #
    def max_text_tokens: () -> Integer

    def temperature=: (Float) -> Float
    def temperature: () -> Float
    def max_initial_ts=: (Float) -> Float

    # See https://github.com/openai/whisper/blob/f82bc59f5ea234d4b97fb2860842ed38519f7e65/whisper/decoding.py#L97
    #
    def max_initial_ts: () -> Float

    def length_penalty=: (Float) -> Float
    def length_penalty: () -> Float
    def temperature_inc=: (Float) -> Float
    def temperature_inc: () -> Float
    def entropy_thold=: (Float) -> Float

    # Similar to OpenAI's "compression_ratio_threshold"
    #
    def entropy_thold: () -> Float

    def logprob_thold=: (Float) -> Float
    def logprob_thold: () -> Float
    def no_speech_thold=: (Float) -> Float
    def no_speech_thold: () -> Float

    # Sets new segment callback, called for every newly generated text segment.
    #
    #     params.new_segment_callback = ->(context, _, n_new, user_data) {
    #       # ...
    #     }
    #
    def new_segment_callback=: (new_segment_callback) -> new_segment_callback
    def new_segment_callback: () -> (new_segment_callback | nil)

    # Sets user data passed to the last argument of new segment callback.
    #
    def new_segment_callback_user_data=: (Object) -> Object

    def new_segment_callback_user_data: () -> Object

    # Sets progress callback, called on each progress update.
    #
    #     params.new_segment_callback = ->(context, _, progress, user_data) {
    #       # ...
    #     }
    #
    # +progress+ is an Integer between 0 and 100.
    #
    def progress_callback=: (progress_callback) -> progress_callback

    def progress_callback: () -> (progress_callback | nil)

    # Sets user data passed to the last argument of progress callback.
    #
    def progress_callback_user_data=: (Object) -> Object

    def progress_callback_user_data: () -> Object

    # Sets encoder begin callback, called when the encoder starts.
    #
    def encoder_begin_callback=: (encoder_begin_callback) -> encoder_begin_callback

    def encoder_begin_callback: () -> (encoder_begin_callback | nil)

    # Sets user data passed to the last argument of encoder begin callback.
    #
    def encoder_begin_callback_user_data=: (Object) -> Object

    def encoder_begin_callback_user_data: () -> Object

    # Sets abort callback, called to check if the process should be aborted.
    #
    #     params.abort_callback = ->(user_data) {
    #       # ...
    #     }
    #
    #
    def abort_callback=: (abort_callback) -> abort_callback

    def abort_callback: () -> (abort_callback | nil)

    # Sets user data passed to the last argument of abort callback.
    #
    def abort_callback_user_data=: (Object) -> Object

    def abort_callback_user_data: () -> Object

    # Enable VAD
    #
    def vad=: (boolish) -> boolish

    def vad: () -> (true | false)

    # Path to the VAD model
    def vad_model_path=: (path | URI | nil) -> (path | URI | nil)

    def vad_model_path: () -> (String | nil)

    def vad_params=: (Whisper::VAD::Params) -> Whisper::VAD::Params
    def vad_params: () -> (Whisper::VAD::Params)

    # Hook called on new segment. Yields each Whisper::Segment.
    #
    #     whisper.on_new_segment do |segment|
    #       # ...
    #     end
    #
    def on_new_segment: { (Segment) -> void } -> void

    # Hook called on progress update. Yields each progress `Integer` between 0 and 100.
    #
    def on_progress: { (Integer progress) -> void } -> void

    # Hook called on encoder starts.
    #
    def on_encoder_begin: { () -> void } -> void

    # Call block to determine whether abort or not. Return `true` when you want to abort.
    #
    #     params.abort_on do
    #       if some_condition
    #         true # abort
    #       else
    #         false # continue
    #       end
    #     end
    #
    def abort_on: { (Object user_data) -> boolish } -> void
  end

  module LogSettable
  end

  class Model
    def self.pre_converted_models: () -> Hash[String, Model::URI]
    def self.coreml_compiled_models: () -> Hash[Model::URI, Model::ZipURI]
    def self.new: () -> instance
    def n_vocab: () -> Integer
    def n_audio_ctx: () -> Integer
    def n_audio_state: () -> Integer
    def n_audio_head: () -> Integer
    def n_audio_layer: () -> Integer
    def n_text_ctx: () -> Integer
    def n_text_state: () -> Integer
    def n_text_head: () -> Integer
    def n_text_layer: () -> Integer
    def n_mels: () -> Integer
    def ftype: () -> Integer
    def type: () -> String

    class URI
      def self.new: (string | ::URI::HTTP) -> instance
      def to_path: -> String
      def clear_cache: -> void
    end

    class ZipURI < URI
      def cache: () -> Pathname
      def clear_cache: () -> void
    end
  end

  class Segment
    include Output::Segment

    type deconstructed_keys = {
      start_time: (Integer | nil),
      end_time: (Integer | nil),
      text: (String | nil),
      no_speech_prob: (Float | nil),
      speaker_turn_next: (true | false | nil),
      n_tokens: (Integer | nil)
    }

    # Start time in milliseconds.
    #
    def start_time: () -> Integer

    # End time in milliseconds.
    #
    def end_time: () -> Integer

    # Whether the next segment is predicted as a speaker turn.
    #
    def speaker_turn_next?: () -> (true | false)

    def text: () -> String
    def no_speech_prob: () -> Float

    # Get number of tokens in the segment
    #
    def n_tokens: () -> Integer

    # Yields each Whisper::Token:
    #
    #     whisper.each_segment.first.each_token do |token|
    #       p token
    #     end
    #
    # Returns an `Enumerator` if no block is given:
    #
    #     whisper.each_segment.first.each_token.to_a # => [#<Whisper::Token>, ...]
    #
    def each_token: { (Token) -> void } -> void
                  | () -> Enumerator[Token]

    #  Possible keys: `:start_time`, `:end_time`, `:text`, `:no_speech_prob`, `:speaker_turn_next`
    #
    #      whisper.each_segment do |segment|
    #        segment => {start_time:, end_time:, text:, no_speech_prob:, speaker_turn_next:}
    #
    #        puts "[#{start_time} --> #{end_time}] #{text} (no speech prob: #{no_speech_prob}#{speaker_turn_next ? ', speaker turns next' : ''})"
    #      end
    def deconstruct_keys: (Array[:start_time | :end_time | :text | :no_speech_prob | :speaker_turn_next | :n_tokens] | nil) -> deconstructed_keys
  end

  class Token
    type deconstructed_keys = {
      id: (Integer | nil),
      tid: (Integer | nil),
      probability: (Float | nil),
      log_probability: (Float | nil),
      pt: (Float | nil),
      ptsum: (Float | nil),
      t_dtw: (Integer | nil),
      voice_length: (Float | nil),
      text: (String | nil),
      start_time: (Integer | nil),
      end_time: (Integer | nil),
    }

    # Token ID.
    #
    def id: () -> Integer

    # Forced timestamp token ID.
    #
    def tid: () -> Integer

    # Probability of the token.
    #
    def probability: () -> Float

    # Log probability of the token.
    #
    def log_probability: () -> Float

    # Probability of the timestamp token.
    #
    def pt: () -> Float

    # Sum of probability of all timestamp tokens.
    #
    def ptsum: () -> Float

    # [EXPERIMENTAL] Token-level timestamps with DTW
    #
    # Do not use if you haven't computed token-level timestamps with dtw.  
    # Roughly corresponds to the moment in audio in which the token was output.
    #
    def t_dtw: () -> Integer

    # Voice length of the token.
    #
    def voice_length: () -> Float

    # Start time of the token.
    #
    # Token-level timestamp data.  
    # Do not use if you haven't computed token-level timestamps.
    #
    def start_time: () -> Integer

    # End time of the token.
    #
    # Token-level timestamp data.  
    # Do not use if you haven't computed token-level timestamps.
    #
    def end_time: () -> Integer

    # Get the token text of the token.
    #
    def text: () -> String
    def deconstruct_keys: (Array[:id | :tid | :probability | :log_probability | :pt | :ptsum | :t_dtw | :voice_length | :start_time | :end_time | :text] | nil) -> deconstructed_keys
  end

  module Parakeet
    extend LogSettable

    VERSION: String

    # Control logging output. The default behavior is to print to stderr.
    #
    def self.log_set: (nil, Object? user_data) -> nil
                    | (^(Integer level, String message, Object user_data) -> void, Object? user_data) -> nil
    def self.system_info_str: () -> String

    class Context
      include Output::Context

      # Load a Parakeet model from the given file path.
      #
      def self.new: (String | path | ::URI::HTTP, ?Params) -> instance

      # Transcribe a single audio file.
      #
      def transcribe: (path audio_file_path, Whisper::Parakeet::Params) -> self

      # Run the entire model: PCM -> log mel spectrogram -> encoder -> decoder -> text.
      # Not thread safe for the same context.
      #
      # The second argument `samples` must be an array of samples, respond to `:length`,
      # or be a MemoryView of an array of float. It must be 32 bit float PCM audio data.
      #
      def full: (Whisper::Parakeet::Params, Array[Float] samples, ?Integer n_samples) -> self
              | (Whisper::Parakeet::Params, _Samples, ?Integer n_samples) -> self

      # Number of generated text segments.
      #
      def full_n_segments: () -> Integer

      # Start time of a segment indexed by `segment_index` in centiseconds (10 times milliseconds).
      #
      #     full_get_segment_t0(3) # => 1668 (16680 ms)
      #
      def full_get_segment_t0: (Integer segment_index) -> Integer

      # End time of a segment indexed by `segment_index` in centiseconds (10 times milliseconds).
      #
      #     full_get_segment_t1(3) # => 1668 (16680 ms)
      #
      def full_get_segment_t1: (Integer segment_index) -> Integer

      # Text of a segment indexed by `segment_index`.
      #
      #     full_get_segment_text(3) # => "ask not what your country can do for you, ..."
      #
      def full_get_segment_text: (Integer segment_index) -> String

      # Number of tokens in the segment indexed by `segment_index`.
      #
      def full_n_tokens: (Integer segment_index) -> Integer

      # Text of the token indexed by `token_index` in the segment indexed by `segment_index`.
      #
      def full_get_token_text: (Integer segment_index, Integer token_index) -> String

      # Token id of the token indexed by `token_index` in the segment indexed by `segment_index`.
      #
      def full_get_token_id: (Integer segment_index, Integer token_index) -> Integer

      # Probability of the token indexed by `token_index` in the segment indexed by `segment_index`.
      #
      def full_get_token_p: (Integer segment_index, Integer token_index) -> Float

      # Token data of the token indexed by `token_index` in the segment indexed by `segment_index`.
      #
      def full_get_token_data: (Integer segment_index, Integer token_index) -> Token

      def model: () -> Model

      # Yields each Whisper::Parakeet::Segment:
      #
      #     parakeet.transcribe("path/to/audio.wav", params)
      #     parakeet.each_segment do |segment|
      #       puts segment.text
      #     end
      #
      # Returns an `Enumerator` if no block given:
      #
      #     parakeet.transcribe("path/to/audio.wav", params)
      #     enum = parakeet.each_segment
      #     enum.to_a # => [#<Whisper::Parakeet::Segment>, ...]
      #
      def each_segment: { (Segment) -> void } -> void
                      | () -> Enumerator[Segment]

      class Params
        def self.new: (?use_gpu: boolish, ?gpu_device: Integer) -> instance
        def use_gpu: () -> boolish
        def use_gpu=: (boolish) -> boolish
        def gpu_device: () -> Integer
        def gpu_device=: (Integer) -> Integer
      end
    end

    class Params
      def self.new: (
        ?n_threads: Integer,
        ?offset_ms: Integer,
        ?duration_ms: Integer,
        ?no_context: boolish,
        ?audio_ctx: Integer,
        ?new_segment_callback: ^(Whisper::Parakeet::Context, untyped, Integer n_new, Object user_data) -> void,
        ?new_segment_callback_user_data: Object,
        ?new_token_callback: ^(Whisper::Parakeet::Context, untyped, Whisper::Parakeet::Token, Object user_data) -> void,
        ?new_token_callback_user_data: Object,
        ?progress_callback: ^(Whisper::Parakeet::Context, untyped, Integer progress, Object user_data) -> void,
        ?progress_callback_user_data: Object,
        ?encoder_begin_callback: ^(Whisper::Parakeet::Context, untyped, Object user_data) -> boolish,
        ?encoder_begin_callback_user_data: Object,
        ?abort_callback: ^(Object user_data) -> boolish,
        ?abort_callback_user_data: Object
      ) -> instance

      # Number of threads to use.
      #
      def n_threads=: (Integer) -> Integer
      def n_threads: () -> Integer

      # Start offset in ms.
      #
      def offset_ms=: (Integer) -> Integer
      def offset_ms: () -> Integer

      # Audio duration to process in ms.
      #
      def duration_ms=: (Integer) -> Integer
      def duration_ms: () -> Integer

      # If `true`, does not use past transcription (if any) as context.
      #
      def no_context=: (boolish) -> boolish
      def no_context: () -> (true | false)

      # Overwrite the audio context size. `0` uses the default value.
      #
      def audio_ctx=: (Integer) -> Integer
      def audio_ctx: () -> Integer

      # Sets new segment callback, called for every newly generated text segment.
      #
      #     params.new_segment_callback = ->(context, _, n_new, user_data) {
      #       # ...
      #     }
      #
      def new_segment_callback=: (^(Whisper::Parakeet::Context, untyped, Integer n_new, Object user_data) -> void) -> (^(Whisper::Parakeet::Context, untyped, Integer n_new, Object user_data) -> void)
      def new_segment_callback: () -> ((^(Whisper::Parakeet::Context, untyped, Integer n_new, Object user_data) -> void) | nil)

      # Sets user data passed to the last argument of new segment callback.
      #
      def new_segment_callback_user_data=: (Object?) -> Object?
      def new_segment_callback_user_data: () -> Object?

      # Sets token callback, called for every newly predicted token.
      #
      def new_token_callback=: (^(Whisper::Parakeet::Context, untyped, Whisper::Parakeet::Token, Object user_data) -> void) -> (^(Whisper::Parakeet::Context, untyped, Whisper::Parakeet::Token, Object user_data) -> void)
      def new_token_callback: () -> ((^(Whisper::Parakeet::Context, untyped, Whisper::Parakeet::Token, Object user_data) -> void) | nil)

      # Sets user data passed to the last argument of token callback.
      #
      def new_token_callback_user_data=: (Object?) -> Object?
      def new_token_callback_user_data: () -> Object?

      # Sets progress callback, called on each progress update.
      #
      # +progress+ is an Integer between 0 and 100.
      #
      def progress_callback=: (^(Whisper::Parakeet::Context, untyped, Integer progress, Object user_data) -> void) -> (^(Whisper::Parakeet::Context, untyped, Integer progress, Object user_data) -> void)
      def progress_callback: () -> ((^(Whisper::Parakeet::Context, untyped, Integer progress, Object user_data) -> void) | nil)

      # Sets user data passed to the last argument of progress callback.
      #
      def progress_callback_user_data=: (Object?) -> Object?
      def progress_callback_user_data: () -> Object?

      # Sets encoder begin callback, called each time before the encoder starts.
      #
      # If it returns `false`, the computation is aborted.
      #
      def encoder_begin_callback=: (^(Whisper::Parakeet::Context, untyped, Object user_data) -> boolish) -> (^(Whisper::Parakeet::Context, untyped, Object user_data) -> boolish)
      def encoder_begin_callback: () -> ((^(Whisper::Parakeet::Context, untyped, Object user_data) -> boolish) | nil)

      # Sets user data passed to the last argument of encoder begin callback.
      #
      def encoder_begin_callback_user_data=: (Object?) -> Object?
      def encoder_begin_callback_user_data: () -> Object?

      # Sets abort callback, called each time before ggml computation starts.
      #
      def abort_callback=: (^(Object user_data) -> boolish) -> (^(Object user_data) -> boolish)
      def abort_callback: () -> ((^(Object user_data) -> boolish) | nil)

      # Sets user data passed to the last argument of abort callback.
      #
      def abort_callback_user_data=: (Object?) -> Object?
      def abort_callback_user_data: () -> Object?

      # Hook called on new segment. Yields each Whisper::Parakeet::Segment.
      #
      def on_new_segment: { (Segment) -> void } -> void

      # Hook called on new token. Yields each Whisper::Parakeet::Token.
      #
      def on_new_token: { (Token) -> void } -> void

      # Hook called on progress update. Yields each progress `Integer` between 0 and 100.
      #
      def on_progress: { (Integer progress) -> void } -> void

      # Hook called each time before the encoder starts.
      #
      def on_encoder_begin: { () -> boolish } -> void

      # Call block to determine whether abort or not. Return `true` when you want to abort.
      #
      def abort_on: { () -> boolish } -> void
    end

    class Segment
      include Output::Segment

      type deconstructed_keys = {
        start_time: (Integer | nil),
        end_time: (Integer | nil),
        text: (String | nil)
      }

      # Start time in milliseconds.
      #
      def start_time: () -> Integer

      # End time in milliseconds.
      #
      def end_time: () -> Integer

      # Text of the segment.
      #
      def text: () -> String

      # Yields each Whisper::Parakeet::Token:
      #
      #     parakeet.each_segment.first.each_token do |token|
      #       p token
      #     end
      #
      # Returns an `Enumerator` if no block is given:
      #
      #     parakeet.each_segment.first.each_token.to_a # => [#<Whisper::Parakeet::Token>, ...]
      #
      def each_token: { (Token) -> void } -> void
                    | () -> Enumerator[Token]

      # Possible keys: `:start_time`, `:end_time`, `:text`
      #
      def deconstruct_keys: (Array[:start_time | :end_time | :text] | nil) -> deconstructed_keys
    end

    class Token
      type deconstructed_keys = {
        id: (Integer | nil),
        duration_idx: (Integer | nil),
        duration_value: (Integer | nil),
        frame_index: (Integer | nil),
        probability: (Float | nil),
        log_probability: (Float | nil),
        start_time: (Integer | nil),
        end_time: (Integer | nil),
        word_start: ((true | false) | nil),
        text: (String | nil),
      }

      # Token ID.
      #
      def id: () -> Integer

      # Index into the model's durations array.
      #
      def duration_idx: () -> Integer

      # Actual duration value.
      #
      def duration_value: () -> Integer

      # Frame index of the token.
      #
      def frame_index: () -> Integer

      # Probability of the token.
      #
      def probability: () -> Float

      # Log probability of the token.
      #
      def log_probability: () -> Float

      # Start time of the token in milliseconds.
      #
      def start_time: () -> Integer

      # End time of the token in milliseconds.
      #
      def end_time: () -> Integer

      # Whether this token is the start of a word.
      #
      def word_start?: () -> (true | false)

      # Get the token text of the token.
      #
      def text: () -> String

      def deconstruct_keys: (Array[:id | :duration_idx | :duration_value | :frame_index | :probability | :log_probability | :start_time | :end_time | :word_start | :text] | nil) -> deconstructed_keys
    end

    class Model
      def n_vocab: () -> Integer
      def n_audio_ctx: () -> Integer
      def n_audio_state: () -> Integer
      def n_audio_head: () -> Integer
      def n_audio_layer: () -> Integer
      def n_mels: () -> Integer
      def ftype: () -> Integer
    end
  end

  module VAD
    class Params
      def self.new: (
        ?threshold: Float,
        ?min_speech_duration_ms: Integer,
        ?min_silence_duration_ms: Integer,
        ?max_speech_duration_s: Float,
        ?speech_pad_ms: Integer,
        ?samples_overlap: Float
      ) -> instance

      # Probability threshold to consider as speech.
      #
      def threshold=: (Float) -> Float

      def threshold: () -> Float

      # Min duration for a valid speech segment.
      #
      def min_speech_duration_ms=: (Integer) -> Integer

      def min_speech_duration_ms: () -> Integer

      # Min silence duration to consider speech as ended.
      #
      def min_silence_duration_ms=: (Integer) -> Integer

      def min_silence_duration_ms: () -> Integer

      # Max duration of a speech segment before forcing a new segment.
      def max_speech_duration_s=: (Float) -> Float

      def max_speech_duration_s: () -> Float

      # Padding added before and after speech segments.
      #
      def speech_pad_ms=: (Integer) -> Integer

      def speech_pad_ms: () -> Integer

      # Overlap in seconds when copying audio samples from speech segment.
      #
      def samples_overlap=: (Float) -> Float

      def samples_overlap: () -> Float
      def ==: (Params) -> (true | false)
    end

    class Context
      def self.new: (String | path | ::URI::HTTP model_name_or_path) -> instance
      def segments_from_samples: (Params, Array[Float] samples, ?Integer n_samples) -> Segments
                               | (Params, _Samples, ?Integer n_samples) -> Segments
      def detect: (path wav_file_path, Params) -> Segments
    end

    class Segments
      include Enumerable[Segment]

      def each: { (Segment) -> void } -> void
              | () -> Enumerator[Segment]
      def length: -> Integer
    end

    class Segment
      type deconstructed_keys = {
        start_time: (Integer | nil),
        end_time: (Integer | nil),
      }

      def start_time: () -> Integer
      def end_time: () -> Integer
      def deconstruct_keys: (Array[:start_time | :end_time] | nil) -> deconstructed_keys
    end
  end

  class Error < StandardError
    attr_reader code: Integer

    def self.new: (Integer code) -> instance
  end
end
