#
# Aura Engine (https://gitlab.servus.at/aura/engine)
#
# Copyright (C) 2017-2020 - The Aura Engine Team.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# READ INI FILE
%include "readini.liq"
default_config = "../config/engine-core.ini"
config =
  list.hd(
    default=default_config,
    process.read.lines(
      "ls /etc/aura/engine-core.ini"
    )
  )
print(
  "\tConfig file: '#{config}'"
)
ini = read_ini(config)
engine_config_folder = string.split(separator="/engine-core.ini", config)
engine_config_folder = list.nth(default="../config/", engine_config_folder, 0)
print(
  "\tengine_config_folder = '#{engine_config_folder}'"
)

# Retrieve a setting either bei 1.) environment variable or 2.) config property.
# If none is available the default value is returned.
def get_setting(default_value, config_prop, env_var) =
  dv = list.assoc(default=default_value, config_prop, ini)
  environment.get(default=dv, env_var)
end

# VERSION CHECK
liq_min_version = list.assoc(default="2.1", "liquidsoap_min_version", ini)
if
  not liquidsoap.version.at_least(liq_min_version)
then
  print(
    "AURA Engine Core requires at least Liquidsoap v#{liq_min_version}"
  )
  exit(1)
end

# ALLOW LIQUIDSOAP RUN AS ROOT
lqs_allow_root =
  get_setting("false", "liquidsoap_as_root", "AURA_ENGINE_RUN_AS_ROOT")
if
  lqs_allow_root == "true"
then
  print(
    "\tAllow Liquidsoap running as root user: true"
  )
  settings.init.allow_root.set(true)
else
  print(
    "\tAllow Liquidsoap running as root user: false"
  )
  settings.init.allow_root.set(false)
end

# SERVER SETTINGS
server_timeout =
  float_of_string(
    get_setting("16380.", "server_timeout", "AURA_ENGINE_SERVER_TIMEOUT")
  )
settings.server.timeout.set(server_timeout)

telnet_server_enable =
  get_setting("true", "telnet_server_enable", "AURA_ENGINE_TELNET_ENABLE")
telnet_server_host =
  get_setting("127.0.0.1", "telnet_server_host", "AURA_ENGINE_TELNET_HOST")
telnet_server_port =
  int_of_string(
    get_setting("1234", "telnet_server_port", "AURA_ENGINE_TELNET_PORT")
  )
if
  telnet_server_enable != "true"
then
  print(
    "\tLiquidsoap Telnet Server: disabled"
  )
  settings.server.telnet.set(false)
else
  print(
    "\tLiquidsoap Telnet Server at #{telnet_server_host}:#{telnet_server_port} (#{
      server_timeout
    }s timeout)"
  )
  settings.server.telnet.bind_addr.set(telnet_server_host)
  settings.server.telnet.port.set(telnet_server_port)
  settings.server.telnet.set(true)
end

# BASICS
settings.console.colorize.set("always")
#settings.request.grace_time.set(2.)

# LOG SETTINGS
engine_version =
  process.read(
    "cat ../VERSION"
  )
log(
  "######################################################################################"
)
log(
  "AURA Engine:Core v#{engine_version} starting ..."
)
log(
  "######################################################################################"
)

log(
  "System Settings:"
)

# LOGGING SETTINGS
settings.log.stdout.set(true)
settings.log.file.set(true)
log_level = get_setting("3", "log_level", "AURA_ENGINE_CORE_LOG_LEVEL")
settings.log.level.set(int_of_string(log_level))
log_dir = get_setting("../logs", "log_dir", "AURA_ENGINE_CORE_LOG_DIR")
log_file = "#{log_dir}/engine-core.log"
settings.log.file.path.set(log_file)
print(
  "\tLogging to '#{log_file}' with log level #{log_level}"
)
log(
  "\tLog level #{log_level}"
)

# CONFIGURATION FILE
log(
  "\tConfig file: '#{config}'"
)

# SOCKET SETTINGS
socket_dir = get_setting("../socket", "socket_dir", "AURA_ENGINE_SOCKET_DIR")
socket_file = "#{socket_dir}/engine.sock"
if
  socket_dir != ""
then
  log(
    "\tSocket location: '#{socket_file}'"
  )
  settings.server.socket.path.set(socket_file)
  settings.server.socket.set(true)
else
  log(
    "\tCRITICAL: No socket directory set!"
  )
end

# SOUND CARD SETTINGS
# settings.audio.converter.samplerate.converters.set(["ffmpeg","libsamplerate","native"])
# settings.decoder.decoders.set(["META","WAV","AIFF","FLAC","AAC","MP4","OGG","MAD"])

a0_in = get_setting("", "input_device_0", "AURA_ENGINE_INPUT_DEVICE")
a1_in = list.assoc(default="", "input_device_1", ini)
a2_in = list.assoc(default="", "input_device_2", ini)
a3_in = list.assoc(default="", "input_device_3", ini)
a4_in = list.assoc(default="", "input_device_4", ini)
a0_out = get_setting("", "output_device_0", "AURA_ENGINE_OUTPUT_DEVICE")
a1_out = list.assoc(default="", "output_device_1", ini)
a2_out = list.assoc(default="", "output_device_2", ini)
a3_out = list.assoc(default="", "output_device_3", ini)
a4_out = list.assoc(default="", "output_device_4", ini)

# ALSA / pulse settings
soundsystem = get_setting("alsa", "soundsystem", "AURA_ENGINE_SOUNDSYSTEM")
use_alsa = soundsystem == "alsa"
use_jack = soundsystem == "jack"

log(
  "\nAudio Settings:"
)
log(
  "\tOutput device: #{a0_out}"
)
if
  a0_in != ""
then
  log(
    "\tInput device: #{a0_in}"
  )
end

# ReplayGain Settings
enable_replaygain_resolver =
  bool_of_string(
    get_setting(
      "false",
      "enable_replaygain_resolver",
      "AURA_ENGINE_ENABLE_REPLAYGAIN_RESOLVER"
    )
  )
if
  enable_replaygain_resolver == true
then
  enable_replaygain_metadata()
  log(
    "\tReplayGain resolver enabled"
  )
end

# Frame Settings
frame_audio_sample_rate =
  int_of_string(
    get_setting(
      "0.0", "frame_audio_sample_rate", "AURA_ENGINE_FRAME_SAMPLERATE"
    )
  )
frame_duration =
  float_of_string(
    get_setting("0.0", "frame_duration", "AURA_ENGINE_FRAME_DURATION")
  )
frame_audio_size =
  int_of_string(get_setting("0", "frame_audio_size", "AURA_ENGINE_FRAME_SIZE"))

if
  frame_audio_sample_rate > 0
then
  log(
    "\tframe.audio.samplerate = #{frame_audio_sample_rate} Hz"
  )
  settings.frame.audio.samplerate.set(frame_audio_sample_rate)
end
if
  frame_duration > 0.0
then
  log(
    "\tframe.duration = #{frame_duration} seconds"
  )
  settings.frame.duration.set(frame_duration)
end
if
  frame_audio_size > 0
then
  log(
    "\tframe.audio.size = #{frame_audio_size} ticks"
  )
  settings.frame.audio.size.set(frame_audio_size)
end

alsa_buffered_input = ref(true)
alsa_buffered_output = ref(true)

if
  use_alsa
then
  log(
    "\nALSA Settings:"
  )
  alsa_buffered_input :=
    bool_of_string(
      get_setting(
        "true", "alsa_buffered_input", "AURA_ENGINE_ALSA_BUFFERED_INPUT"
      )
    )
  alsa_buffered_output :=
    bool_of_string(
      get_setting(
        "true", "alsa_buffered_output", "AURA_ENGINE_ALSA_BUFFERED_OUTPUT"
      )
    )
  alsa_buffer =
    int_of_string(get_setting("0", "alsa_buffer", "AURA_ENGINE_ALSA_BUFFER"))
  alsa_buffer_length =
    int_of_string(
      get_setting("0", "alsa_buffer_length", "AURA_ENGINE_ALSA_BUFFER_LENGTH")
    )
  alsa_periods =
    int_of_string(get_setting("0", "alsa_periods", "AURA_ENGINE_ALSA_PERIODS"))

  log(
    "\talsa_buffered_input = #{alsa_buffered_input()}"
  )
  log(
    "\talsa_buffered_output = #{alsa_buffered_output()}"
  )

  if
    alsa_buffer > 0
  then
    log(
      "\tInternal buffer size (alsa.alsa_buffer) = #{alsa_buffer}"
    )
    settings.alsa.alsa_buffer.set(alsa_buffer)
  end
  if
    alsa_buffer_length > 0
  then
    log(
      "\tBuffer size, in frames (alsa.buffer_length) = #{alsa_buffer_length}"
    )
    settings.alsa.buffer_length.set(alsa_buffer_length)
  end
  if
    alsa_periods > 0
  then
    log(
      "\tPeriods (alsa.periods) = #{alsa_periods}"
    )
    settings.alsa.periods.set(alsa_periods)
  end
end

log(
  "\nStream Settings:"
)

# INPUT STREAM SETTINGS
input_stream_max_buffer =
  float_of_string(
    get_setting(
      "5.0", "input_stream_max_buffer", "AURA_ENGINE_STREAM_INPUT_MAX_BUFFER"
    )
  )
input_stream_timeout =
  float_of_string(
    get_setting(
      "10.0", "input_stream_timeout", "AURA_ENGINE_STREAM_INPUT_TIMEOUT"
    )
  )
log(
  "\tInput stream max buffer: #{input_stream_max_buffer}"
)
log(
  "\tInput stream timeout: #{input_stream_timeout}"
)

# OUTPUT STREAM
s0_enable =
  get_setting("false", "stream_0", "AURA_ENGINE_STREAM_OUTPUT_ENABLE") == "true"

# s1_enable = list.assoc(default="false", "stream_1", ini) == "true"
# s2_enable = list.assoc(default="false", "stream_2", ini) == "true"
# s3_enable = list.assoc(default="false", "stream_3", ini) == "true"
# s4_enable = list.assoc(default="false", "stream_4", ini) == "true"
log(
  "\tOutput stream enabled: #{s0_enable}"
)

log(
  "\nOther Settings:"
)

# AUDIO AND PLAYLIST SOURCES
audio_playlist_folder =
  get_setting(
    "../audio/playlists", "audio_playlist_folder", "AURA_ENGINE_PLAYLIST_FOLDER"
  )

# FALLBACK SETTINGS
fallback_show_name =
  ref(
    get_setting(
      "Station Fallback",
      "fallback_show_name",
      "AURA_ENGINE_FALLBACK_SHOW_NAME"
    )
  )
fallback_show_id =
  ref(get_setting("-1", "fallback_show_id", "AURA_ENGINE_FALLBACK_SHOW_ID"))
fallback_type =
  get_setting("folder", "fallback_type", "AURA_ENGINE_FALLBACK_TYPE")
fallback_station_playlist_name =
  get_setting(
    "station-fallback-playlist.m3u",
    "fallback_music_playlist",
    "AURA_ENGINE_FALLBACK_PLAYLIST"
  )
fallback_station_playlist_path =
  "#{audio_playlist_folder}/#{fallback_station_playlist_name}"
fallback_station_dir =
  get_setting(
    "../audio/fallback", "fallback_music_folder", "AURA_ENGINE_FALLBACK_FOLDER"
  )
fallback_station_dir_reload =
  int_of_string(
    get_setting(
      "300",
      "fallback_music_folder_reload",
      "AURA_ENGINE_FALLBACK_FOLDER_RELOAD"
    )
  )
fallback_max_blank =
  float_of_string(
    get_setting("15.", "fallback_max_blank", "AURA_ENGINE_FALLBACK_MAX_BLANK")
  )
fallback_min_noise =
  float_of_string(
    get_setting("0.", "fallback_min_noise", "AURA_ENGINE_FALLBACK_MIN_NOISE")
  )
fallback_threshold =
  float_of_string(
    get_setting("-80.", "fallback_threshold", "AURA_ENGINE_FALLBACK_THRESHOLD")
  )
log(
  "\tfallback_station_playlist_path = '#{fallback_station_playlist_path}'"
)
log(
  "\tfallback_station_dir = '#{fallback_station_dir}'"
)

# FADING SETTINGS
# fade_in_time = list.assoc(default="", "fade_in_time", ini) #int_of_string(list.assoc(default="", "fade_in_time", ini))
# fade_out_time = list.assoc(default="", "fade_out_time", ini) #int_of_string(list.assoc(default="", "fade_out_time", ini))

# Metadata Configuration
engine_meta_key_show_id =
  get_setting("show_id", "meta_key_show_id", "AURA_ENGINE_META_KEY_SHOW_ID")
engine_default_track_type =
  get_setting("0", "default_track_type", "AURA_ENGINE_DEFAULT_TRACK_TYPE")
engine_api_playlog =
  get_setting(
    "http://127.0.0.1:8008/api/v1/playlog",
    "api_url_playlog",
    "AURA_ENGINE_API_URL_PLAYLOG"
  )

# "1" or "2" used for HA setups
engine_id = get_setting("1", "engine_id", "AURA_ENGINE_ID")

log(
  "\n######################################################################################"
)