#!/bin/bash

show_help() {
    echo "Usage: tdl [URL] | -f [FILE]"
    echo "Download URLs using tiddl."
    echo ""
    echo "Arguments:"
    echo "  URL               A single URL to download."
    echo ""
    echo "Options:"
    echo "  -f, --file FILE   Path to a text file containing one URL per line."
    echo "  --help            Display this help message and exit."
}

if [[ $# -eq 0 ]] || [[ "$1" == "--help" ]]; then
    show_help
    exit 0
fi

if [[ "$1" == "-f" || "$1" == "--file" ]]; then
    if [[ -z "$2" ]]; then
        echo "Error: File path required for $1."
        exit 1
    fi
    INPUT_FILE="$2"
    if [[ ! -f "$INPUT_FILE" ]]; then
        echo "Error: File '$INPUT_FILE' not found."
        exit 1
    fi

    while IFS= read -r url || [[ -n "$url" ]]; do
        [[ -z "$url" || "$url" =~ ^[[:space:]]*# ]] && continue
        url=$(echo "$url" | xargs)
        tiddl download url "$url"
    done < "$INPUT_FILE"
else
    tiddl download url "$1"
fi