package catering.order;

import org.springframework.data.util.Streamable;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.time.LocalDate;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.Optional;


@Controller
public class OrderController {

	private final CustomOrderRepository orderRepository;
	private final CustomCart cart;

	public OrderController(CustomOrderRepository orderRepository, CustomCart cart) {
		this.orderRepository = orderRepository;
		this.cart = cart;
	}

	@GetMapping("/orders")
	public String orders(Model model) {
		model.addAttribute("orders", orderRepository.getOrders());
		model.addAttribute("total", orderRepository.getOrders().size());
		return "orders";
	}

	@GetMapping("/event")
	public String event(Model model) {
		model.addAttribute("orderType", cart.getOrderType());
		model.addAttribute("items", cart.getProucts());
		model.addAttribute("productForm", new ProductForm());
		return "event";
	}

	@PostMapping("/orders/remove")
	public String removeOrder(@RequestParam int orderID) {
		orderRepository.removeOrder(orderID);
		return "redirect:/orders";
	}


	@PostMapping("/event/addProduct")
	public String addProduct(@ModelAttribute ProductForm productForm, Model model) {
		cart.addProduct(productForm.getProduct(), productForm.getNumber());
		model.addAttribute("orderType", cart.getOrderType());
		model.addAttribute("items", cart.getProucts());
		model.addAttribute("productForm", new ProductForm());
		return "redirect:/event";
	}

	@PostMapping("/event/checkout")
	public String checkout(Model model) {
		CustomOrder myOrder = new CustomOrder(
			cart.getOrderType(),
			LocalDateTime.MIN,
			LocalDateTime.MAX,
			cart.getProucts(),
			false,
			Double.MAX_VALUE
			);

		orderRepository.addOrder(myOrder);
		model.addAttribute("orders", orderRepository.getOrders());
		model.addAttribute("total", orderRepository.getOrders().size());
		cart.resetCart();
		return "redirect:/orders";
	}

	@PostMapping("/event/changeOrderType")
	public String changeOrderType(@RequestParam(name = "orderType") Optional<String> optionalOrderType, Model model) {
		String orderType = optionalOrderType.orElse("FOO");
		switch (orderType) {
			case "RaK":
				cart.setOrderType(CustomOrder.OrderType.RENT_A_COOK);
				break;
			case "EK":
				cart.setOrderType(CustomOrder.OrderType.EVENT_CATERING);
				break;
			case "SN":
				cart.setOrderType(CustomOrder.OrderType.SUSHI_NIGHT);
				break;
			default:
		}

		return "redirect:/event";
	}

	@GetMapping("/orders/calender")
	public String calender(Model model) {
		LocalDate startDate = LocalDate.now();

		ArrayList<ArrayList<ArrayList<String>>> weeksOfMonth = new ArrayList<ArrayList<ArrayList<String>>>(4);
		for (int i = 0; i < 4; i++) {
			ArrayList<LocalDate> datesOfTheWeek = new ArrayList<LocalDate>(7);
			LocalDate startOfWeek = startDate.plusDays(7*i);
			LocalDate endOfWeekDate = startOfWeek.plusDays(6);
			for (LocalDate date = startOfWeek; !date.isAfter(endOfWeekDate); date = date.plusDays(1)) {
				datesOfTheWeek.add(date);
			}

			ArrayList<ArrayList<String>> week_to_add_to_month = new ArrayList<ArrayList<String>>(7);
			for (LocalDate date : datesOfTheWeek) {
				ArrayList<String> x = new ArrayList<String>(2);
				x.add(Integer.toString(date.getDayOfMonth()));
				week_to_add_to_month.add(x);
			}
			//datesOfTheWeek.clear();
			weeksOfMonth.add(week_to_add_to_month);
		}

		LocalDate endDate = startDate.plusDays(27);

		// get orders_in_next_month (in future sorted by endDate)
		Iterable<CustomOrder> orders_in_next_month = this.orderRepository.getOrders().stream().filter(e ->
			!e.getFinish().toLocalDate().isBefore(startDate) && // end is not before today
			!e.getStart().toLocalDate().isAfter(endDate)).toList();


		for (CustomOrder order : orders_in_next_month) {
			int start_index_inclusive = Math.max(order.getStart().toLocalDate().compareTo(startDate),0);
			int end_index_exclusive = Math.min(order.getFinish().toLocalDate().compareTo(startDate), 27) + 1;
			for (int i = start_index_inclusive; i < end_index_exclusive; i++) {
				weeksOfMonth.get((int) i/7).get(Math.floorMod(i,7)).add(Integer.toString(order.getId()));
			}
		}
//		for (List<List<String>> orders_in_next_week : orders_in_next_month) {
//			orders_in_next_weeks.stream().filter(e ->
//				e.start.toLocalDate().isEqual(calender_day) || // start day
//				e.end.toLocalDate().isEqual(calender_day) || // end day
//				e.start.toLocalDate().isBefore(calender_day) && end.toLocalDate().isAfter(calender_day) // day in between start and end
//			).toList().count();
//		}

		// calendar header with names of week
		LocalDate endOfWeekDate = startDate.plusDays(6);
		ArrayList<String> dayNames = new ArrayList<String>(7);
		for (LocalDate date = startDate; !date.isAfter(endOfWeekDate); date = date.plusDays(1)) {
			dayNames.add(date.getDayOfWeek().toString());
		}

		model.addAttribute("weeksOfMonth", weeksOfMonth);
		model.addAttribute("dayNames", dayNames);
		return "orders_calender";
	}
}