package com.nttdata.calender.changes;


import com.bmc.arsys.api.SortInfo;
import com.nttdata.calender.api.Query;
import com.nttdata.calender.changes.query.Filter;
import com.nttdata.calender.changes.query.FilterElement;
import com.nttdata.calender.changes.query.Sort;
import com.nttdata.calender.errorhandling.ErrorTypes.ValidationError;

/**
 * Represents a change request object that stores information about slice start,
 * slice end,
 * filter criteria, and sorting options.
 */
public class ChangeRequest {
    private int sliceStart;
    private int sliceEnd;
    private Filter filter;
    private Sort sort;

    /**
     * Returns the starting index of the slice.
     *
     * @return an int representing the slice start index.
     */
    public int getSliceStart() {
        return this.sliceStart;
    }

    /**
     * Sets the starting index of the slice.
     *
     * @param sliceStart an int representing the slice start index.
     */
    public void setSliceStart(int sliceStart) {
        this.sliceStart = sliceStart;
    }

    /**
     * Returns the ending index of the slice.
     *
     * @return an int representing the slice end index.
     */
    public int getSliceEnd() {
        return this.sliceEnd;
    }

    /**
     * Sets the ending index of the slice.
     *
     * @param sliceEnd an int representing the slice end index.
     */
    public void setSliceEnd(int sliceEnd) {
        this.sliceEnd = sliceEnd;
    }

    /**
     * Returns the array of filter criteria.
     *
     * @return an array of {@link FilterElement} objects representing the filter
     *         criteria.
     */
    public Filter getFilter() {
        return this.filter;
    }

    /**
     * Sets the array of filter criteria.
     *
     * @param filter an array of {@link FilterElement} objects representing the
     *               filter
     *               criteria.
     */
    public void setFilter(Filter filter) {
        this.filter = filter;
    }

    /**
     * Returns the sorting options for the change request.
     *
     * @return a {@link Sort} object representing the sorting options.
     */
    public Sort getSort() {
        return this.sort;
    }

    /**
     * Sets the sorting options for the change request.
     *
     * @param sort a {@link Sort} object representing the sorting options.
     */
    public void setSort(Sort sort) {
        this.sort = sort;
    }

    /**
     * Adds a filter to the list of filters.
     *
     * @param filter the filter to add
     */
    public void addFilter(FilterElement filter) {
        if (this.filter == null) {
            this.filter = new Filter();
        }
        this.filter.addFilter(filter);
    }

    /**
     * Constructs and returns a `SortInfo` object based on the provided `Query`
     * object.
     * If no sort information is available, returns `null`.
     *
     * @param query the query object used for constructing the `SortInfo`
     * @return the constructed `SortInfo` object, or `null` if no sort information
     *         is available
     * @throws ValidationError if a validation error occurs during construction
     */
    public SortInfo constructSortInfo(Query query) throws ValidationError {
        if (this.sort != null) {
            return this.sort.getSortInfo(query);
        }
        return null;
    }
}