import type {
	InventoryEntry,
	InventoryEntryChangeQuantityAction,
	InventoryEntryRemoveQuantityAction,
	InventoryEntrySetCustomFieldAction,
	InventoryEntrySetCustomTypeAction,
	InventoryEntrySetExpectedDeliveryAction,
	InventoryEntrySetRestockableInDaysAction,
	InventoryEntryUpdateAction,
} from "@commercetools/platform-sdk";
import type { Writable } from "#src/types.ts";
import type { UpdateHandlerInterface } from "../abstract.ts";
import { AbstractUpdateHandler, type RepositoryContext } from "../abstract.ts";

export class InventoryEntryUpdateHandler
	extends AbstractUpdateHandler
	implements
		Partial<UpdateHandlerInterface<InventoryEntry, InventoryEntryUpdateAction>>
{
	changeQuantity(
		context: RepositoryContext,
		resource: Writable<InventoryEntry>,
		{ quantity }: InventoryEntryChangeQuantityAction,
	) {
		resource.quantityOnStock = quantity;
		// don't know active reservations so just set to same value
		resource.availableQuantity = quantity;
	}

	removeQuantity(
		context: RepositoryContext,
		resource: Writable<InventoryEntry>,
		{ quantity }: InventoryEntryRemoveQuantityAction,
	) {
		const newQuantity = Math.max(0, resource.quantityOnStock - quantity);
		resource.quantityOnStock = newQuantity;
		// don't know active reservations so just set to same value
		resource.availableQuantity = newQuantity;
	}

	setCustomField(
		context: RepositoryContext,
		resource: InventoryEntry,
		{ name, value }: InventoryEntrySetCustomFieldAction,
	) {
		this._setCustomFieldValues(resource, { name, value });
	}

	async setCustomType(
		context: RepositoryContext,
		resource: Writable<InventoryEntry>,
		{ type, fields }: InventoryEntrySetCustomTypeAction,
	) {
		await this._setCustomType(context, resource, { type, fields });
	}

	setExpectedDelivery(
		context: RepositoryContext,
		resource: Writable<InventoryEntry>,
		{ expectedDelivery }: InventoryEntrySetExpectedDeliveryAction,
	) {
		resource.expectedDelivery = new Date(expectedDelivery!).toISOString();
	}

	setRestockableInDays(
		context: RepositoryContext,
		resource: Writable<InventoryEntry>,
		{ restockableInDays }: InventoryEntrySetRestockableInDaysAction,
	) {
		resource.restockableInDays = restockableInDays;
	}
}