function filter(elements, filters) {
    const compareDate = (dateA, dateB) => {
        const dA = new Date(dateA);
        const dB = new Date(dateB);

        if (filters.yearOrder === "asc") {
            return dB - dA;
        } else {
            return dA - dB;
        }
    };


    return [...elements].sort((a, b) => {
        const sortedATasks = a.tasks.sort((taskA, taskB) =>
            compareDate(taskA.start, taskB.start)
        );
        const sortedBTasks = b.tasks.sort((taskA, taskB) =>
            compareDate(taskA.start, taskB.start)
        );

        const timeComparison = compareDate(
            sortedATasks[0].start,
            sortedBTasks[0].start
        );

        if (timeComparison !== 0) {
            return timeComparison;
        }

        if (filters.alphabetical !== null) {
            return filters.alphabetical === "asc"
                ? a.name.localeCompare(b.name)
                : b.name.localeCompare(a.name);
        }

        return 0;
    });
}


export default filter;