# SPDX-FileCopyrightText: 2019 Kattni Rembor for Adafruit Industries
#
# SPDX-License-Identifier: MIT

"""
`adafruit_circuitplayground.bluefruit`
====================================================

CircuitPython helper for Circuit Playground Bluefruit.

* Author(s): Kattni Rembor

Implementation Notes
--------------------

**Hardware:**

* `Circuit Playground Bluefruit <https://www.adafruit.com/product/4333>`_

"""

try:
    import typing
except ImportError:
    pass

import array
import math

import audiobusio
import audiomp3
import audiopwmio
import board
import digitalio

from adafruit_circuitplayground.circuit_playground_base import CircuitPlaygroundBase

__version__ = "0.0.0+auto.0"
__repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_CircuitPlayground.git"


class Bluefruit(CircuitPlaygroundBase):
    """Represents a single CircuitPlayground Bluefruit."""

    _audio_out = audiopwmio.PWMAudioOut

    def __init__(self) -> None:
        # Only create the cpb module member when we aren't being imported by Sphinx
        if (
            "__module__" in dir(digitalio.DigitalInOut)
            and digitalio.DigitalInOut.__module__ == "sphinx.ext.autodoc"
        ):
            return

        super().__init__()

        self._sample = None

        # Define mic/sound sensor:
        self._mic = audiobusio.PDMIn(
            board.MICROPHONE_CLOCK,
            board.MICROPHONE_DATA,
            sample_rate=16000,
            bit_depth=16,
        )
        self._mic_samples = None

    @staticmethod
    def _normalized_rms(values) -> float:
        mean_values = int(sum(values) / len(values))
        return math.sqrt(
            sum(float(sample - mean_values) * (sample - mean_values) for sample in values)
            / len(values)
        )

    @property
    def sound_level(self) -> float:
        """Obtain the sound level from the microphone (sound sensor).

        .. image :: ../docs/_static/microphone.jpg
          :alt: Microphone (sound sensor)

        This example prints the sound levels. Try clapping or blowing on
        the microphone to see the levels change.

        .. code-block:: python

          from adafruit_circuitplayground.bluefruit import cpb

          while True:
              print(cpb.sound_level)
        """
        if self._mic_samples is None:
            self._mic_samples = array.array("H", [0] * 160)
        self._mic.record(self._mic_samples, len(self._mic_samples))
        return self._normalized_rms(self._mic_samples)

    def loud_sound(self, sound_threshold: int = 200) -> bool:
        """Utilise a loud sound as an input.

        :param int sound_threshold: Threshold sound level must exceed to return true (Default: 200)

        .. image :: ../docs/_static/microphone.jpg
          :alt: Microphone (sound sensor)

        This example turns the LEDs red each time you make a loud sound.
        Try clapping or blowing onto the microphone to trigger it.

        .. code-block:: python

          from adafruit_circuitplayground.bluefruit import cpb

          while True:
              if cpb.loud_sound():
                  cpb.pixels.fill((50, 0, 0))
              else:
                  cpb.pixels.fill(0)

        You may find that the code is not responding how you would like.
        If this is the case, you can change the loud sound threshold to
        make it more or less responsive. Setting it to a higher number
        means it will take a louder sound to trigger. Setting it to a
        lower number will take a quieter sound to trigger. The following
        example shows the threshold being set to a higher number than
        the default.

        .. code-block:: python

          from adafruit_circuitplayground.bluefruit import cpb

          while True:
              if cpb.loud_sound(sound_threshold=300):
                  cpb.pixels.fill((50, 0, 0))
              else:
                  cpb.pixels.fill(0)
        """

        return self.sound_level > sound_threshold

    def play_mp3(self, file_name: str) -> None:
        """Play a .mp3 file using the onboard speaker.

        :param file_name: The name of your .mp3 file in quotation marks including .mp3

        .. image :: ../docs/_static/speaker.jpg
          :alt: Onboard speaker

        To use with the Circuit Playground Bluefruit:

        .. code-block:: python

             from adafruit_circuitplayground import cp

             while True:
                 if cp.button_a:
                     cp.play_mp3("laugh.mp3")
                 elif cp.button_b:
                     cp.play_mp3("rimshot.mp3")
        """
        if file_name.lower().endswith(".mp3"):
            # Play a specified file.
            self.stop_tone()
            self._speaker_enable.value = True
            with self._audio_out(board.SPEAKER) as audio, audiomp3.MP3Decoder(
                open(file_name, "rb")
            ) as mp3file:
                audio.play(mp3file)
                while audio.playing:
                    pass
            self._speaker_enable.value = False
        else:
            raise ValueError("Filetype must be mp3")


cpb = Bluefruit()
"""Object that is automatically created on import.

   To use, simply import it from the module:

   .. code-block:: python

     from adafruit_circuitplayground.bluefruit import cpb
"""
