import { NextRequest, NextResponse } from "next/server";
import { bagistoFetch } from "@/utils/bagisto";
import {
    CREATE_ADD_PRODUCT_IN_CART,
    REMOVE_CART_ITEM,
    UPDATE_CART_ITEM,
    GET_CART_ITEM,
    CREATE_CART_TOKEN,
    CREATE_MERGE_CART,
    GET_CHECKOUT_ADDRESSES,
    GET_CHECKOUT_SHIPPING_RATES,
    GET_CHECKOUT_PAYMENT_METHODS,
    CREATE_CHECKOUT_ADDRESS,
    CREATE_CHECKOUT_SHIPPING_METHODS,
    CREATE_CHECKOUT_PAYMENT_METHODS,
    CREATE_CHECKOUT_ORDER,
    // CREATE_PRODUCT_REVIEW,
    CREATE_PAYMENT_INITIATE,
    CREATE_SAVE_CHECKOUT_CART,
    GET_ORDER_DETAILS,
    CREATE_CANCEL_ORDER,
    // GET_PRODUCT_BY_URL_KEY,
} from "@/graphql";

const ALLOWED_OPERATIONS: Record<string, any> = {
    createAddProductInCart: CREATE_ADD_PRODUCT_IN_CART,
    RemoveCartItem: REMOVE_CART_ITEM,
    UpdateCartItem: UPDATE_CART_ITEM,
    GetCartItem: GET_CART_ITEM,
    CreateCart: CREATE_CART_TOKEN,
    createMergeCart: CREATE_MERGE_CART,
    collectionGetCheckoutAddresses: GET_CHECKOUT_ADDRESSES,
    CheckoutShippingRates: GET_CHECKOUT_SHIPPING_RATES,
    CheckoutPaymentMethods: GET_CHECKOUT_PAYMENT_METHODS,
    createCheckoutAddress: CREATE_CHECKOUT_ADDRESS,
    CreateCheckoutShippingMethod: CREATE_CHECKOUT_SHIPPING_METHODS,
    CreateCheckoutPaymentMethod: CREATE_CHECKOUT_PAYMENT_METHODS,
    CreateCheckoutOrder: CREATE_CHECKOUT_ORDER,
    // CreateProductReview: CREATE_PRODUCT_REVIEW,
    CreatePaymentInitiate: CREATE_PAYMENT_INITIATE, // 创建订单
    CreateSaveCheckoutCart: CREATE_SAVE_CHECKOUT_CART,
    GetOrderDetails: GET_ORDER_DETAILS, // 获取订单详情
    CreateCancelOrder: CREATE_CANCEL_ORDER
};
// const QUERY_OPERATIONS: Record<string, any> = {
//     GetProductById: GET_PRODUCT_BY_URL_KEY,
// }

interface FetchOption  {
    query: string;
    variables?: Record<string, any>;
    cache?: RequestCache;
    takeAuthorization?: boolean;
    operationName?: string;
}

// 需要authorization的operation
function authorizationOperations(body: Record<string, any>): FetchOption {
    const { operationName, variables } = body;
    const query = ALLOWED_OPERATIONS[operationName];
    const finalVariables = variables;
 
    return {
        query,
        variables: finalVariables,
        takeAuthorization: true,
        cache: "no-store",
        // operationName
    }
}


// 不需要authorization的operation
function notAuthorizationOperations(body: Record<string, any>): FetchOption {
    const { query, variables } = body;
    // const query = bodyGraphqlQuery;
    return {
        query,
        variables,
        cache: "no-store",
        takeAuthorization: false,
        // operationName
    }
}

export async function POST(req: NextRequest) {
    try {
        const body = await req.json();
        const { operationName } = body;

        if (!operationName) {
            return NextResponse.json(
                { message: "Invalid or unauthorized operation: " + (operationName || "missing") },
                { status: 400 }
            );
        }
        let fetchOption: FetchOption = notAuthorizationOperations(body);
        if(ALLOWED_OPERATIONS[operationName]) {
            fetchOption = authorizationOperations(body);
        }

        
        const response = await bagistoFetch<any>(fetchOption);
        console.log('bagistoFetch response ------ ', response);
        return NextResponse.json(response.body,{
            status: response.status
        });
    } catch (error) {
        console.log('bagistoFetch ERROR ------ ', error);
        return NextResponse.json(
            {
                errors:[
                    {
                        message: error instanceof Error ? error.message : "Network error"
                    }
                ],
                data:null
            },
            { status:500 }
        );
    }
}