package catering.order;

import catering.staff.Employee;
import jakarta.persistence.*;
import org.javamoney.moneta.Money;
import org.salespointframework.order.Order;
import org.salespointframework.payment.Cash;
import org.salespointframework.useraccount.UserAccount;
import org.springframework.data.annotation.Id;

import javax.money.MonetaryAmount;
import java.time.Duration;
import java.time.LocalDateTime;
import java.time.YearMonth;
import java.time.format.DateTimeFormatter;
import java.util.HashSet;
import java.util.Set;

@Entity
public class CustomOrder extends Order {
	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	private Long id;
	@ManyToMany
	private Set<Employee> staff;
	private OrderType orderType = OrderType.EVENT_CATERING;
	private LocalDateTime start;
	private LocalDateTime finish;
	private boolean invoiceAvailable = false;
	private String formatterPattern = "dd.MM.yyyy, HH:mm 'Uhr'";

	// Constructor
	public CustomOrder(UserAccount.UserAccountIdentifier identifier, CustomCart cart) {
		super(identifier, Cash.CASH);
		this.staff = new HashSet<>();
		this.orderType = cart.getOrderType();
		this.start = cart.getStart();
		this.finish = cart.getFinish();
		this.formatterPattern = cart.getFormatterPattern();
	}

	public CustomOrder() { }

	private long getDurationInSeconds(LocalDateTime start, LocalDateTime finish) {
		if (start.compareTo(finish) > 0) {
			return 0;
		}
		return Duration.between(start, finish).getSeconds();
	}

	/**
	 * Helper function to get the amount of hours in between start and finish (analogous to CustomCart)
	 * @return hours between start and finish
	 */
	private long getDurationInHours(LocalDateTime start, LocalDateTime finish) {
		return getDurationInSeconds(start, finish) / 3600;
	}

	public long getDurationInHours() {
		return getDurationInHours(start, finish);
	}

	private static LocalDateTime min(LocalDateTime a, LocalDateTime b) {
		return (a.compareTo(b)) < 0 ? a : b;
	}

	private static LocalDateTime max(LocalDateTime a, LocalDateTime b) {
		return (a.compareTo(b)) > 0 ? a : b;
	}

	public long getDurationInSecondsDuringMonth(YearMonth month) {
		LocalDateTime startInMonth = max(this.start, month.atDay(1).atStartOfDay());
		LocalDateTime finishInMonth = min(this.finish, month.plusMonths(1).atDay(1).atStartOfDay());
		return getDurationInSeconds(startInMonth, finishInMonth);
	}

	/**
	 * Adds an employee to the order and adds a new {@Link ChangeLine} containing the costs
	 */
	public boolean addEmployee(Employee employee) {
		MonetaryAmount cost = Money.of(employee.getWage(), "EUR")
			.multiply(getDurationInHours());

		if (this.staff.add(employee)) {
			super.addChargeLine(cost, employee.getId().toString());
			return true;
		}
		return false;
	}

	public Set<Employee> getStaff() {
		return staff;
	}

	public OrderType getOrderType() {
		return orderType;
	}

	public LocalDateTime getStart() {
		return start;
	}

	/**
	 * @return start DateTime in a formatted manner
	 */
	public String getFormattedStart() {
		return start.format(DateTimeFormatter.ofPattern(formatterPattern));
	}

	public LocalDateTime getFinish() {
		return finish;
	}

	/**
	 * @return finish DateTime in a formatted manner
	 */
	public String getFormattedFinish() {
		return finish.format(DateTimeFormatter.ofPattern(formatterPattern));
	}

	public boolean isInvoiceAvailable() {
		return invoiceAvailable;
	}

	public void setInvoiceAvailable(boolean available) {
		this.invoiceAvailable = available;
	}
}