class Utils {
	static makeVehiclesSearchQuery(queryParams) {
		const { query, brand, model, color, regions } = queryParams;
	
		let numberQuery = Utils.makeNumberQuery(query, regions?.split(',') ?? []);
		let findQuery = { 
			'brand.name.normalized': brand, 
			'model.name.normalized': model, 
			color 
		};
	
		let findQueryFiltered = Object.fromEntries(Object.entries(findQuery).filter(([,val]) => val ));
		return { ...findQueryFiltered, ...numberQuery };
	}
	
	static makeNumberQuery(number, regions) {
		let regionsQuery = null;
		if(regions.length > 0) {
			regionsQuery = { $or: regions.map(r => { return { number: { $regex: `\\D${r}$` } }; }) };
		}
		if(number && regionsQuery) {
			return { $and: [ { number: { $regex: number } }, regionsQuery ] };
		} else if(number) {
			return { number: { $regex: number } };
		} else if(regionsQuery) {
			return regionsQuery;
		} else {
			return {};
		}
	}
}

module.exports = Utils;