#!/bin/bash

while getopts d:i:o: flag
do
    case "${flag}" in
        d) directory="${OPTARG}";;
        i) input_file="${OPTARG}";;
        o) output_file="${OPTARG}";;
        *)  # Catch-all for unexpected arguments
            echo "Invalid option: -$OPTARG" >&2
            echo "Usage: ./compress.sh -d <audio_folder> -i <input_file> -o <output_file>"
            exit 1
            ;;
    esac
done

# Check if the directory is provided
if [ -z "$directory" ]; then
    echo "Directory is required."
    echo "Usage: ./compress.sh -d <audio_folder> -i <input_file> -o <output_file>"
    exit 1
fi

if [ -z "$input_file" ]; then
    echo "Input file is required."
    echo "Usage: ./compress.sh -d <audio_folder> -i <input_file> -o <output_file>"
    exit 1
fi

if [ -z "$output_file" ]; then
    echo "Output file is required."
    echo "Usage: ./compress.sh -d <audio_folder> -i <input_file> -o <output_file>"
    exit 1
fi

cd "$directory" || exit 1

# Compress the file
/usr/bin/ffmpeg -i "$input_file" -ar 16000 -ac 1 -map 0:a "$output_file"

WAIT_TIME=5

# Function to check for file existence
check_file() {
  if [ -f "$output_file" ]; then
    echo "File $output_file is available."
    return 0
  else
    echo "File $output_file is not available yet. Waiting..."
    return 1
  fi
}

# Wait for the file to become available
while ! check_file; do
  sleep $WAIT_TIME
done