import type {
	Product,
	Order,
	ProductVariantResponse,
	PatternVariantsResponse,
	ProductCover,
	Legal,
	DeliveryMethod,
	PaymentMethod,
	ApiResponse
} from "~/types";

/**
 * Shop API composable.
 * All requests go through dedicated Nuxt server API routes.
 * The API token is handled server-side and never exposed to clients.
 */
export function useShopApi() {
	return {
		// Products
		async getProducts(coverId?: string, page = 1, pageSize = 24) {
			const params = new URLSearchParams();
			if (coverId) params.append("cover", coverId);
			params.append("page", page.toString());
			params.append("pageSize", pageSize.toString());

			return await $fetch<ApiResponse<Product>>(`/api/products?${params}`);
		},

		async getCheapestProducts(coverId?: string, page = 1, pageSize = 24) {
			const params = new URLSearchParams();
			if (coverId) params.append("cover", coverId);
			params.append("page", page.toString());
			params.append("pageSize", pageSize.toString());

			return await $fetch<ApiResponse<Product>>(`/api/products/promo?${params}`);
		},

		async getProductById(id: string) {
			return await $fetch<Product>(`/api/products/${id}`);
		},

		async getProductBySlug(slug: string) {
			return await $fetch<Product | null>(`/api/product/${slug}`);
		},

		async getProductVariants(id: string): Promise<ProductVariantResponse> {
			return await $fetch<ProductVariantResponse>(`/api/products/${id}/variants`);
		},

		async getProductVariantsByProductId(id: number): Promise<ProductVariantResponse> {
			return await $fetch<ProductVariantResponse>(`/api/products/${id}/variants`);
		},

		async getPatternVariants(id: string): Promise<PatternVariantsResponse> {
			return await $fetch<PatternVariantsResponse>(`/api/products/${id}/variants/pattern`);
		},

		async getPatternVariantsByProductId(id: number): Promise<PatternVariantsResponse> {
			return await $fetch<PatternVariantsResponse>(`/api/products/${id}/variants/pattern`);
		},

		// Product metadata
		async getProductRulings() {
			return await $fetch<ApiResponse<unknown>>(`/api/product-rulings`);
		},

		async getProductPatterns() {
			return await $fetch<ApiResponse<unknown>>(`/api/product-patterns`);
		},

		async getProductPages() {
			return await $fetch<ApiResponse<unknown>>(`/api/product-pages`);
		},

		async getProductCovers() {
			return await $fetch<ApiResponse<ProductCover>>(`/api/product-covers`);
		},

		async getProductCoverById(id: string) {
			return await $fetch<ApiResponse<ProductCover>>(`/api/product-covers/${id}`);
		},

		// Orders
		async createOrder(): Promise<Order> {
			return await $fetch<Order>("/api/orders", { method: "POST" });
		},

		async getOrder(uuid: string): Promise<Order> {
			return await $fetch<Order>(`/api/orders/${uuid}`);
		},

		async updateOrder(uuid: string, data: Partial<Order>): Promise<Order> {
			return await $fetch<Order>(`/api/orders/${uuid}`, {
				method: "PUT",
				body: { data }
			});
		},

		async addProductToCart(uuid: string, productId: number, count = 1): Promise<Order> {
			return await $fetch<Order>(`/api/orders/${uuid}/add-product/${productId}?count=${count}`, {
				method: "PUT"
			});
		},

		async removeProductFromCart(uuid: string, productId: number, count = 1): Promise<Order> {
			return await $fetch<Order>(`/api/orders/${uuid}/remove-product/${productId}?count=${count}`, {
				method: "PUT"
			});
		},

		async checkoutOrder(uuid: string): Promise<{ id: string }> {
			const returnUrl = import.meta.client ? window.location.href : "";
			return await $fetch<{ id: string }>(`/api/orders/${uuid}/checkout?returnUrl=${encodeURIComponent(returnUrl)}`, {
				method: "POST"
			});
		},

		async capturePayment(uuid: string, paypalOrderId: string): Promise<Order> {
			return await $fetch<Order>(`/api/orders/${uuid}/capture/${paypalOrderId}`, {
				method: "POST"
			});
		},

		// Payment & Delivery
		async getPaymentMethods() {
			return await $fetch<ApiResponse<PaymentMethod>>(`/api/payments`);
		},

		async getDeliveryMethods() {
			return await $fetch<ApiResponse<DeliveryMethod>>(`/api/deliveries`);
		},

		// Content
		async getLegal(): Promise<Legal> {
			return await $fetch<Legal>(`/api/legal`);
		},

		async getContent(): Promise<unknown> {
			return await $fetch<unknown>(`/api/content`);
		},

		async getWebsites(): Promise<unknown> {
			return await $fetch<unknown>(`/api/websites`);
		}
	};
}