/**
 * Converts a time string (e.g., "1d2h3m4s") into milliseconds or seconds
 * @param {string} timeStr - The time string to convert (e.g., "1d2h3m4s")
 * @param {boolean} [inSeconds=false] - If true, returns result in seconds instead of milliseconds
 * @returns {number} The converted time in milliseconds or seconds
 */
function dhms(timeStr, inSeconds = false) {
    // Return 0 for invalid input
    if (typeof timeStr !== 'string' || !timeStr.trim()) {
        return 0;
    }

    // Define time unit multipliers
    const multipliers = {
        s: inSeconds ? 1 : 1000,
        m: inSeconds ? 60 : 60000,
        h: inSeconds ? 3600 : 3600000,
        d: inSeconds ? 86400 : 86400000
    };

    // Remove whitespace and split into parts
    const cleanStr = timeStr.replace(/\s/g, '');
    
    // Extract the numeric value at the end (if any)
    const tailMatch = cleanStr.match(/-?\d+$/);
    const tailValue = tailMatch ? parseInt(tailMatch[0], 10) : 0;

    // Extract and convert time parts
    const timeParts = (cleanStr.match(/-?\d+[^-0-9]+/g) || [])
        .map(part => {
            const value = parseInt(part.replace(/[^-0-9]+/g, ''), 10);
            const unit = part.replace(/[-0-9]+/g, '');
            return value * (multipliers[unit] || 0);
        });

    // Sum all parts including the tail
    return [tailValue, ...timeParts].reduce((sum, value) => sum + value, 0);
}

module.exports = dhms;