# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: Apache-2.0

# Purpose:
# polly_list_lexicons.rb demonstrates how to produce an MP3 file containing the synthesized
# speech from a text file using Amazon Polly using the AWS SDK for Ruby.

# snippet-start:[polly.ruby.synthesizeSpeech]

require 'aws-sdk-polly' # In v2: require 'aws-sdk'

begin
  # Get the filename from the command line
  if ARGV.empty?
    puts 'You must supply a filename'
    exit 1
  end

  filename = ARGV[0]

  # Open file and get the contents as a string
  if File.exist?(filename)
    contents = IO.read(filename)
  else
    puts "No such file: #{filename}"
    exit 1
  end

  # Create an Amazon Polly client using
  # credentials from the shared credentials file ~/.aws/credentials
  # and the configuration (region) from the shared configuration file ~/.aws/config
  polly = Aws::Polly::Client.new

  resp = polly.synthesize_speech({
                                   output_format: 'mp3',
                                   text: contents,
                                   voice_id: 'Joanna'
                                 })

  # Save output
  # Get just the file name
  #  abc/xyz.txt -> xyx.txt
  name = File.basename(filename)

  # Split up name so we get just the xyz part
  parts = name.split('.')
  first_part = parts[0]
  mp3_file = "#{first_part}.mp3"

  IO.copy_stream(resp.audio_stream, mp3_file)

  puts "Wrote MP3 content to: #{mp3_file}"
rescue StandardError => e
  puts 'Got error:'
  puts 'Error message:'
  puts e.message
end
# snippet-end:[polly.ruby.synthesizeSpeech]
