import type { RawMaterialTableGroup, RawMaterialTableRow } from '@/types/raw-material';

export function groupRawMaterialRows(rows: RawMaterialTableRow[]): RawMaterialTableGroup[] {
    const groups: RawMaterialTableGroup[] = [];
    const indexByMaterialId = new Map<number, number>();

    for (const row of rows) {
        const existingIndex = indexByMaterialId.get(row.raw_material_id);

        if (existingIndex === undefined) {
            indexByMaterialId.set(row.raw_material_id, groups.length);
            groups.push({
                raw_material_id: row.raw_material_id,
                raw_material_row_number: row.raw_material_row_number,
                raw_material_name: row.raw_material_name,
                unit: row.unit,
                unit_label: row.unit_label,
                unit_abbreviation: row.unit_abbreviation,
                is_active: row.is_active,
                variants: [row],
            });

            continue;
        }

        groups[existingIndex].variants.push(row);
    }

    return groups;
}