export function formatDuration(seconds: number): string {
    const hours = Math.floor(seconds / 3600);
    const minutes = Math.floor((seconds % 3600) / 60);
    if (hours > 0) {
        return `${hours}h ${minutes}m`;
    }
    return `${minutes}m`;
}

export function formatDate(dateString: string): string {
    const date = new Date(dateString);
    return date.toLocaleDateString("en-US", {
        year: "numeric",
        month: "short",
        day: "numeric",
    });
}

export function getContrastColor(hexColor: string | undefined): string {
    if (!hexColor) return "#ffffff";
    const hex = hexColor.replace("#", "");
    const r = parseInt(hex.substr(0, 2), 16);
    const g = parseInt(hex.substr(2, 2), 16);
    const b = parseInt(hex.substr(4, 2), 16);
    const luminance = (0.299 * r + 0.587 * g + 0.114 * b) / 255;
    return luminance > 0.5 ? "#000000" : "#ffffff";
}