package service;

import Common;
import tink.core.Error;

/**
 * Order Service
 * @author web-wizard,fbarbut
 */
class OrderService {
	static function canHaveFloatQt(product:db.Product):Bool {
		return product.hasFloatQt || product.wholesale || product.variablePrice;
	}

	/**
	 * Make a product Order
	 * 
	 * @param	quantity
	 * @param	productId
	 */
	public static function make(user:db.User, quantity:Float, product:db.Product, ?distribId:Int, ?paid:Bool, ?user2:db.User, ?invert:Bool):db.UserContract {
		var t = sugoi.i18n.Locale.texts;

		if (product.contract.type == db.Contract.TYPE_VARORDER && distribId == null)
			throw "You have to provide a distribId";
		if (quantity == null)
			throw "Quantity is null";

		// quantity
		if (!canHaveFloatQt(product)) {
			if (!tools.FloatTool.isInt(quantity)) {
				throw new tink.core.Error(t._("Error : product \"::product::\" quantity should be integer", {product: product.name}));
			}
		}

		// multiweight : make one row per product
		if (product.multiWeight && quantity > 1.0) {
			if (product.multiWeight && quantity != Math.abs(quantity))
				throw t._("multi-weighing products should be ordered only with integer quantities");

			var o = null;
			for (i in 0...Math.round(quantity)) {
				o = make(user, 1, product, distribId, paid, user2, invert);
			}
			return o;
		}

		// checks
		if (quantity <= 0)
			return null;

		// check for previous orders on the same distrib
		var prevOrders = new List<db.UserContract>();
		if (distribId == null) {
			prevOrders = db.UserContract.manager.search($product == product && $user == user, true);
		} else {
			prevOrders = db.UserContract.manager.search($product == product && $user == user && $distributionId == distribId, true);
		}

		// Create order object
		var o = new db.UserContract();
		o.product = product;
		o.quantity = quantity;
		o.productPrice = product.price;
		if (product.contract.hasPercentageOnOrders()) {
			o.feesRate = product.contract.percentageValue;
		}
		o.user = user;
		if (user2 != null) {
			o.user2 = user2;
			if (invert != null)
				o.flags.set(InvertSharedOrder);
		}
		if (paid != null)
			o.paid = paid;
		if (distribId != null)
			o.distribution = db.Distribution.manager.get(distribId);

		// cumulate quantities if there is a similar previous order
		if (prevOrders.length > 0 && !product.multiWeight) {
			for (prevOrder in prevOrders) {
				// if (!prevOrder.paid) {
				o.quantity += prevOrder.quantity;
				prevOrder.delete();
				// }
			}
		}

		// create a basket object
		if (distribId != null) {
			var dist = o.distribution;
			var basket = db.Basket.getOrCreate(user, dist.place, dist.date);
			o.basket = basket;
		}

		o.insert();

		// Stocks
		if (o.product.stock != null) {
			var c = o.product.contract;
			if (c.hasStockManagement()) {
				// trace("stock for "+quantity+" x "+product.name);
				if (o.product.stock == 0) {
					if (App.current.session != null) {
						App.current.session.addMessage(t._("There is no more '::productName::' in stock, we removed it from your order",
							{productName: o.product.name}), true);
					}
					o.quantity -= quantity;
					if (o.quantity <= 0) {
						o.delete();
						return null;
					}
				} else if (o.product.stock - quantity < 0) {
					var canceled = quantity - o.product.stock;
					o.quantity -= canceled;
					o.update();

					if (App.current.session != null) {
						var msg = t._("We reduced your order of '::productName::' to quantity ::oQuantity:: because there is no available products anymore",
							{productName: o.product.name, oQuantity: o.quantity});
						App.current.session.addMessage(msg, true);
					}
					o.product.lock();
					o.product.stock = 0;
					o.product.update();
					App.current.event(StockMove({product: o.product, move: 0 - (quantity - canceled)}));
				} else {
					o.product.lock();
					o.product.stock -= quantity;
					o.product.update();
					App.current.event(StockMove({product: o.product, move: 0 - quantity}));
				}
			}
		}
		return o;
	}

	/**
	 * Edit an existing order (quantity)
	 */
	public static function edit(order:db.UserContract, newquantity:Float, ?paid:Bool, ?user2:db.User, ?invert:Bool) {
		var t = sugoi.i18n.Locale.texts;

		order.lock();

		// quantity
		if (newquantity == null)
			newquantity = 0;
		if (!canHaveFloatQt(order.product)) {
			if (!tools.FloatTool.isInt(newquantity)) {
				throw new tink.core.Error(t._("Error : product \"::product::\" quantity should be integer", {product: order.product.name}));
			}
		}

		// paid
		if (paid != null) {
			order.paid = paid;
		} else {
			if (order.quantity < newquantity)
				order.paid = false;
		}

		// shared order
		if (user2 != null) {
			order.user2 = user2;
			if (invert == true)
				order.flags.set(InvertSharedOrder);
			if (invert == false)
				order.flags.unset(InvertSharedOrder);
		} else {
			order.user2 = null;
			order.flags.unset(InvertSharedOrder);
		}

		// stocks
		var e:Event = null;
		if (order.product.stock != null) {
			var c = order.product.contract;

			if (c.hasStockManagement()) {
				if (newquantity < order.quantity) {
					// on commande moins que prévu : incrément de stock
					order.product.lock();
					order.product.stock += (order.quantity - newquantity);
					e = StockMove({product: order.product, move: 0 - (order.quantity - newquantity)});
				} else {
					// on commande plus que prévu : décrément de stock
					var addedquantity = newquantity - order.quantity;

					if (order.product.stock - addedquantity < 0) {
						// stock is not enough, reduce order
						newquantity = order.quantity + order.product.stock;
						if (App.current.session != null)
							App.current.session.addMessage(t._("We reduced your order of '::productName::' to quantity ::oQuantity:: because there is no available products anymore",
								{
								productName: order.product.name,
								oQuantity: newquantity
							}), true);

						e = StockMove({product: order.product, move: 0 - order.product.stock});

						order.product.lock();
						order.product.stock = 0;
					} else {
						// stock is big enough
						order.product.lock();
						order.product.stock -= addedquantity;

						e = StockMove({product: order.product, move: 0 - addedquantity});
					}
				}
				order.product.update();
			}
		}

		// update order
		if (newquantity == 0) {
			order.quantity = 0;
			order.paid = true;
			order.update();
		} else {
			order.quantity = newquantity;
			order.update();
		}

		App.current.event(e);

		return order;
	}

	/**
	 *  Delete an order
	 */
	public static function delete(order:db.UserContract) {
		var t = sugoi.i18n.Locale.texts;

		if (order == null)
			throw new Error(t._("This order has already been deleted."));

		order.lock();

		if (order.quantity == 0) {
			var contract = order.product.contract;
			var user = order.user;

			// Amap Contract
			if (contract.type == db.Contract.TYPE_CONSTORDERS) {
				order.delete();

				if (contract.amap.hasPayments()) {
					var orders = contract.getUserOrders(user);
					if (orders.length == 0) {
						var operation = db.Operation.findCOrderTransactionFor(contract, user);
						if (operation != null)
							operation.delete();
					}
				}
			} else { // Variable orders contract

				// Get the basket for this user
				var place = order.distribution.place;
				var basket = db.Basket.get(user, place, order.distribution.date);

				if (contract.amap.hasPayments()) {
					var orders = basket.getOrders();
					// Check if it is the last order, if yes then delete the related operation
					if (orders.length == 1 && orders.first().id == order.id) {
						var operation = db.Operation.findVOrderTransactionFor(order.distribution.getKey(), user, place.amap);
						if (operation != null)
							operation.delete();
					}
				}

				order.delete();
			}
		} else {
			throw new Error(t._("Deletion not possible: quantity is not zero."));
		}
	}

	/**
	 * Prepare a simple dataset, ready to be displayed
	 */
	public static function prepare(orders:Iterable<db.UserContract>):Array<UserOrder> {
		var out = new Array<UserOrder>();
		var orders = Lambda.array(orders);
		var view = App.current.view;
		var t = sugoi.i18n.Locale.texts;
		for (o in orders) {
			var x:UserOrder = cast {};
			x.id = o.id;
			x.userId = o.user.id;
			x.userName = o.user.getCoupleName();
			x.userEmail = o.user.email;

			// shared order
			if (o.user2 != null) {
				x.userId2 = o.user2.id;
				x.userName2 = o.user2.getCoupleName();
				x.userEmail2 = o.user2.email;
			}

			// deprecated
			x.productId = o.product.id;
			x.productRef = o.product.ref;
			x.productQt = o.product.qt;
			x.productUnit = o.product.unitType;
			x.productPrice = o.productPrice;
			x.productImage = o.product.getImage();
			x.productHasFloatQt = o.product.hasFloatQt;
			x.productHasVariablePrice = o.product.variablePrice;
			// new way
			x.product = o.product.infos();
			x.product.price = o.productPrice; // do not use current price, but price of the order

			x.quantity = o.quantity;

			// smartQt
			if (x.quantity == 0.0) {
				x.smartQt = t._("Canceled");
			} else if (x.productHasFloatQt || x.productHasVariablePrice || o.product.wholesale) {
				x.smartQt = view.smartQt(x.quantity, x.productQt, x.productUnit);
			} else {
				x.smartQt = Std.string(x.quantity);
			}

			// product name.
			if (x.productHasVariablePrice || x.productQt == null || x.productUnit == null) {
				x.productName = o.product.name;
			} else {
				x.productName = o.product.name + " " + view.formatNum(x.productQt) + " " + view.unit(x.productUnit, x.productQt > 1);
			}

			x.subTotal = o.quantity * o.productPrice;

			var c = o.product.contract;

			if (o.feesRate != 0) {
				x.fees = x.subTotal * (o.feesRate / 100);
				x.percentageName = c.percentageName;
				x.percentageValue = o.feesRate;
				x.total = x.subTotal + x.fees;
			} else {
				x.total = x.subTotal;
			}

			// flags
			x.paid = o.paid;
			x.invertSharedOrder = o.flags.has(InvertSharedOrder);
			x.contractId = c.id;
			x.contractName = c.name;
			x.canModify = o.canModify();

			out.push(x);
		}

		return sort(out);
	}

	/**
	 * Confirms an order : create real orders from tmp orders in session
	 * @param	order
	 */
	public static function confirmSessionOrder(tmpOrder:OrderInSession) {
		var orders = [];
		var user = db.User.manager.get(tmpOrder.userId);
		for (o in tmpOrder.products) {
			o.product = db.Product.manager.get(o.productId);
			orders.push(make(user, o.quantity, o.product, o.distributionId));
		}

		App.current.event(MakeOrder(orders));
		App.current.session.data.order = null;

		return orders;
	}

	/**
	 *  Send an order-by-products report to the coordinator
	 */
	public static function sendOrdersByProductReport(d:db.Distribution) {
		var t = sugoi.i18n.Locale.texts;

		var m = new sugoi.mail.Mail();
		m.addRecipient(d.contract.contact.email, d.contract.contact.getName());
		m.setSender(App.config.get("default_email"), t._("Cagette.net"));
		m.setSubject('[${d.contract.amap.name}] Distribution du ${App.current.view.dDate(d.date)} (${d.contract.name})');
		var orders = service.ReportService.getOrdersByProduct(d);

		var html = App.current.processTemplate("mail/ordersByProduct.mtt", {
			contract: d.contract,
			distribution: d,
			orders: orders,
			formatNum: App.current.view.formatNum,
			currency: App.current.view.currency,
			dDate: App.current.view.dDate,
			hHour: App.current.view.hHour,
			group: d.contract.amap
		});

		m.setHtmlBody(html);
		App.sendMail(m);
	}

	/**
	 *  Order summary for a member
	 *  WARNING : its for one distrib, not for a whole basket !
	 */
	public static function sendOrderSummaryToMembers(d:db.Distribution) {
		var t = sugoi.i18n.Locale.texts;
		var title = '[${d.contract.amap.name}] Votre commande pour le ${App.current.view.dDate(d.date)} (${d.contract.name})';

		for (user in d.getUsers()) {
			var m = new sugoi.mail.Mail();
			m.addRecipient(user.email, user.getName(), user.id);
			if (user.email2 != null)
				m.addRecipient(user.email2, user.getName(), user.id);
			m.setSender(App.config.get("default_email"), t._("Cagette.net"));
			m.setSubject(title);
			var orders = prepare(d.contract.getUserOrders(user, d));

			var html = App.current.processTemplate("mail/orderSummaryForMember.mtt", {
				contract: d.contract,
				distribution: d,
				orders: orders,
				formatNum: App.current.view.formatNum,
				currency: App.current.view.currency,
				dDate: App.current.view.dDate,
				hHour: App.current.view.hHour,
				group: d.contract.amap
			});

			m.setHtmlBody(html);
			App.sendMail(m);
		}
	}

	public static function sort(orders:Array<UserOrder>) {
		// order by lastname (+lastname2 if exists), then contract
		orders.sort(function(a, b) {
			if (a.userName
				+ a.userId
				+ a.userName2
				+ a.userId2
				+ a.contractId > b.userName
					+ b.userId
					+ b.userName2
					+ b.userId2
					+ b.contractId) {
				return 1;
			}
			if (a.userName
				+ a.userId
				+ a.userName2
				+ a.userId2
				+ a.contractId < b.userName
					+ b.userId
					+ b.userName2
					+ b.userId2
					+ b.contractId) {
				return -1;
			}
			return 0;
		});

		return orders;
	}
}