export function formatRelativeTime(isoTimestamp: string): string {
    const date = new Date(isoTimestamp);
    const now = new Date();
    const diffMs = now.getTime() - date.getTime();
    const diffMinutes = Math.floor(diffMs / (1000 * 60));
    const diffHours = Math.floor(diffMs / (1000 * 60 * 60));
    const diffDays = Math.floor(diffMs / (1000 * 60 * 60 * 24));

    if (diffMinutes < 1) {
        return "à l'instant";
    }

    if (diffMinutes < 60) {
        return `il y a ${diffMinutes} min`;
    }

    if (diffHours < 24) {
        return `il y a ${diffHours} h`;
    }

    const yesterday = new Date(now);
    yesterday.setDate(yesterday.getDate() - 1);
    if (
        date.getDate() === yesterday.getDate() &&
        date.getMonth() === yesterday.getMonth() &&
        date.getFullYear() === yesterday.getFullYear()
    ) {
        return 'hier';
    }

    if (diffDays < 7) {
        return `il y a ${diffDays} ${diffDays === 1 ? 'jour' : 'jours'}`;
    }

    const day = String(date.getDate()).padStart(2, '0');
    const month = String(date.getMonth() + 1).padStart(2, '0');
    const year = date.getFullYear();
    return `${day}/${month}/${year}`;
}

export function useRelativeTime() {
    return { formatRelativeTime };
}