#!/usr/bin/env bash

# Source the script 'common-functions.sh'.
SCRIPT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &>/dev/null && pwd)
ROOT_DIR=$(grep --only-matching "^.*scripts[^/]*" <<<"$SCRIPT_DIR")
source "$ROOT_DIR/common-functions.sh"

_main() {
    local input_files=""
    local output_dir=""

    # Execute initial checks.
    _check_dependencies "
        command=sox |
        pkg_manager=apt; package=libsox-fmt-mp3"
    _display_wait_box "2"
    input_files=$(_get_files "par_type=file; par_recursive=true; par_select_mime='audio/|video/'")

    # Execute the function '_main_task' for each file in parallel.
    _run_task_parallel "$input_files" "$output_dir"

    local std_output=""
    std_output=$(_storage_text_read_all)
    std_output=$(_text_sort "$std_output")

    _display_list_box "$std_output" "--column=Status;--column=File"
}

_main_task() {
    local input_file=$1
    local output_dir=$2
    local std_output=""

    # Run the main process.
    std_output=$(sox "$input_file" -n remix 1 sinc "19k-20k" -m stat 2>&1)
    _check_output "$?" "$std_output" "$input_file" ""

    std_output=$(grep "^Mean.*norm" <<<"$std_output")
    std_output=$(cut -d ":" -f 2 <<<"$std_output")
    std_output=$(tr -d " " <<<"$std_output")

    local status="[excellent quality]"
    if [[ -z "$std_output" ]]; then
        status="[poor quality]"
    elif [[ "$std_output" == "0.00000"* ]]; then
        status="[medium quality]"
    fi

    if [[ "$status" == "[medium quality]" ]]; then
        std_output=$(sox "$input_file" -n remix 1 sinc "17k-18k" -m stat 2>&1)
        _check_output "$?" "$std_output" "$input_file" ""

        std_output=$(grep "^Mean.*norm" <<<"$std_output")
        std_output=$(cut -d ":" -f 2 <<<"$std_output")
        std_output=$(tr -d " " <<<"$std_output")

        if [[ -z "$std_output" ]]; then
            status="[poor quality]"
        elif [[ "$std_output" == "0.00000"* ]]; then
            status="[poor quality]"
        fi
    fi

    _storage_text_write_ln "$status$FIELD_SEPARATOR$(_text_remove_pwd "$input_file")"
}

_main "$@"