#!/usr/bin/with-contenv bashio
# shellcheck shell=bash

# Maximum file size in bytes (50MB)
MAX_SIZE=$((50 * 1024 * 1024))

# Function to check if a file is a valid WAV
is_valid_wav() {
    local file="$1"
    # Check if the file contains a valid WAV header
    file "$file" | grep -qE 'WAVE audio'
}

if [ -d "$HOME"/BirdSongs/StreamData ]; then
    bashio::log.fatal "Container stopping, saving temporary files."

    # Stop the services in parallel
    if systemctl is-active --quiet birdnet_analysis; then
        bashio::log.info "Stopping birdnet_analysis service."
        systemctl stop birdnet_analysis &
    fi

    if systemctl is-active --quiet birdnet_recording; then
        bashio::log.info "Stopping birdnet_recording service."
        systemctl stop birdnet_recording &
    fi

    # Wait for both services to stop
    wait

    # Create the destination directory
    mkdir -p /config/TemporaryFiles

    # Move only valid WAV files under 50MB
    shopt -s nullglob # Prevent errors if no files match
    for file in "$HOME"/BirdSongs/StreamData/*.wav; do
        if [ -f "$file" ] && [ "$(stat --format="%s" "$file")" -lt "$MAX_SIZE" ] && is_valid_wav "$file"; then
            if mv -v "$file" /config/TemporaryFiles/; then
                bashio::log.info "Moved valid WAV file: $(basename "$file")"
            else
                bashio::log.error "Failed to move: $(basename "$file")"
            fi
        else
            bashio::log.warning "Skipping invalid or large file: $(basename "$file")"
        fi
    done

    bashio::log.info "... files safe, allowing container to stop."
else
    bashio::log.info "No StreamData directory to process."
fi