package cc.mrbird.febs.pay.controller;

import cc.mrbird.febs.common.entity.FebsResponse;
import cc.mrbird.febs.common.enumerates.OrderDeliveryStateEnum;
import cc.mrbird.febs.common.enumerates.OrderStatusEnum;
import cc.mrbird.febs.common.exception.FebsException;
import cc.mrbird.febs.common.utils.ValidateEntityUtils;
import cc.mrbird.febs.mall.entity.MallOrderInfo;
import cc.mrbird.febs.mall.entity.MallOrderItem;
import cc.mrbird.febs.mall.mapper.MallOrderInfoMapper;
import cc.mrbird.febs.pay.model.FIUUInitPayRequest;
import cn.hutool.core.date.DateUtil;
import cn.hutool.json.JSONUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.collections.CollectionUtils;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Slf4j
@RestController
@Api(value = "FIUUController", tags = "FIUU支付")
@RequestMapping(value = "/api/fuPay")
public class FIUUController {

    @Resource
    private MallOrderInfoMapper mallOrderInfoMapper;
    @ApiOperation(value = "初始化FIUU支付信息", notes = "初始化FIUU支付信息")
    @PostMapping("/initPayment")
    public FebsResponse initPayment(@RequestBody FIUUInitPayRequest orderRequest) {
        Long orderId = orderRequest.getOrderId();
        MallOrderInfo mallOrderInfo = ValidateEntityUtils.ensureColumnReturnEntity(orderId, MallOrderInfo::getId, mallOrderInfoMapper::selectOne, "订单不存在");
        ValidateEntityUtils.ensureNotEqual("1", mallOrderInfo.getPayResult(), "订单已支付");
        String amount = mallOrderInfo.getAmount().toString();
        String productNames = getProductNames(mallOrderInfo.getMemberId(), mallOrderInfo.getId());
        try {
            String merchantId = "e2umart01";
            String verifyKey = "4e3a4ed58e62ddbfacf41f6d5ec56bf2";
            String returnUrl = "https://api.mye2u.com/api/fuPay/callback"; // 支付结果回调地址

            // 生成 vcode（MD5(amount + merchantId + orderId + verifyKey)）
            String vcode = DigestUtils.md5Hex(
                    amount +
                            merchantId +
                            orderRequest.getOrderId() +
                            verifyKey
            );

            // 返回支付参数
            Map<String, String> params = new HashMap<>();
            params.put("merchant_id", merchantId);
            params.put("orderid", String.valueOf(orderId));
            params.put("amount", amount);
            params.put("bill_name", orderRequest.getBuyerName());
            params.put("bill_email", orderRequest.getBuyerEmail());
            params.put("bill_mobile", orderRequest.getBuyerMobile());
            params.put("bill_desc", productNames);
            params.put("currency", "MYR"); // 默认 MYR
            params.put("vcode", vcode);
//            params.put("returnurl", returnUrl);

            return new FebsResponse().success().data(params);
        } catch (Exception e) {
            return new FebsResponse().fail().message("支付参数校验失败");
        }
    }

    /**
     * FIUU 回调接口
     * @param request
     */
    @PostMapping("/notify")
    public void handlePaymentNotification(HttpServletRequest request) {
        // 1. 从POST请求中获取参数
        Map<String, String> params = new HashMap<>();
        request.getParameterMap().forEach((key, values) -> params.put(key, values[0]));
        log.info("notify: {}", JSONUtil.parseObj(params));

        // 2. 验证skey的完整性
        boolean isValid = verifySkey(params);
        if (!isValid) {
            return;
        }

        // 3. 解析关键参数
        String status = params.get("status");
        String orderId = params.get("orderid");
        String amount = params.get("amount");
        String tranID = params.get("tranID");
        String paydate = params.get("paydate");

        log.info("notify status: {}", status);
        // 4. 根据状态码更新订单
        if ("00".equals(status)) {
            // 支付成功，更新订单状态
            updateOrderStatus(orderId, status, amount, paydate, tranID);
            // 可选：记录交易ID防止重复处理
            log.info("Payment succeeded for order: {}", orderId);
        } else {
            // 支付失败或待处理
            log.warn("Payment failed/pending for order: {}", orderId);
        }

        // 5. 返回ACK响应（可选，但推荐）
        return;
    }

    private boolean verifySkey(Map<String, String> params) {
        // 从配置或数据库中获取Secret Key
        String secretKey = "59c709fc18978a6a83b87f05d37cecbf";

        // 按API文档生成skey
        String tranID = params.get("tranID");
        String orderId = params.get("orderid");
        String status = params.get("status");
        String domain = params.get("domain");
        String amount = params.get("amount");
        String currency = params.get("currency");
        String appcode = params.get("appcode");
        String paydate = params.get("paydate");
        String receivedSkey = params.get("skey");

        // 第一步哈希：pre_skey = md5(txnID + orderID + status + domain + amount + currency)
        String preSkey = DigestUtils.md5Hex(tranID + orderId + status + domain + amount + currency);

        log.info("notify preSkey: {}", preSkey);
        // 第二步哈希：skey = md5(paydate + domain + pre_skey + appcode + secretKey)
        String calculatedSkey = DigestUtils.md5Hex(paydate + domain + preSkey + appcode + secretKey);

        log.info("notify calculatedSkey: {}", calculatedSkey);

        return calculatedSkey.equals(receivedSkey);
    }

    private void updateOrderStatus(String orderId, String status, String amount, String paydate, String tranID) {
        // 实现订单状态更新逻辑（如更新数据库）
        MallOrderInfo mallOrderInfo = ValidateEntityUtils.ensureColumnReturnEntity(orderId, MallOrderInfo::getId, mallOrderInfoMapper::selectOne, "订单不存在");
        ValidateEntityUtils.ensureNotEqual(mallOrderInfo.getPayResult(), "1", "订单已支付");
        ValidateEntityUtils.ensureEqual(mallOrderInfo.getAmount().toString(), amount, "订单金额异常");
        // 更新订单状态
        if ("00".equals(status)) {
            mallOrderInfo.setPayMethod("FIUU支付");
            mallOrderInfo.setStatus(OrderStatusEnum.WAIT_SHIPPING.getValue());
            mallOrderInfo.setPayResult("1");
            mallOrderInfo.setPayTime(DateUtil.parseDateTime(paydate));
            mallOrderInfo.setDeliveryState(OrderDeliveryStateEnum.DELIVERY_WAIT.getValue());
            mallOrderInfo.setPayOrderNo(tranID);
            mallOrderInfoMapper.updateById(mallOrderInfo);
        }
    }

    // Java 通知接口 暂时停止使用
    @PostMapping("/callback")
    public FebsResponse handlePaymentCallback(@RequestParam Map<String, String> params) {
        String secretKey = "59c709fc18978a6a83b87f05d37cecbf";
        String tranID = params.get("tranID");
        String orderId = params.get("orderid");
        String status = params.get("status");
        String domain = params.get("domain");
        String amount = params.get("amount");
        String currency = params.get("currency");
        String paydate = params.get("paydate");
        String skey = params.get("skey");

        // 计算 skey 验证
        String preSkey = DigestUtils.md5Hex(tranID + orderId + status + domain + amount + currency);
        String calculatedSkey = DigestUtils.md5Hex(paydate + domain + preSkey + secretKey);

        if (!calculatedSkey.equals(skey)) {
            throw new FebsException("订单回调失败，---"+orderId);
        }

        updateOrderStatus(orderId, status, amount, paydate, tranID);
        if ("00".equals(status)) {
            return new FebsResponse().success().data("/pages/order/pay/paySuccess?amount="+ amount +"&type=3");
        }else{
            return new FebsResponse().fail().message("支付失败");
        }
    }

    /**
     * 根据用户ID和订单ID获取所购买商品名称
     * @return 所含商品名称（多个以"，"隔开）
     */
    public String getProductNames(Long memberId, Long orderId) {
        MallOrderInfo mallOrderInfo = mallOrderInfoMapper.selectOrderByMemberIdAndId(memberId, orderId);
        List<MallOrderItem> details = mallOrderInfo.getItems();
        if (CollectionUtils.isEmpty(details)) {
            return "";
        }
        StringBuffer productNameBuffer = new StringBuffer();
        Integer maxLength = 30;
        for (int i = 0; i< details.size(); i++) {
            MallOrderItem mallOrderItem = details.get(i);
            String goodsName = mallOrderItem.getGoodsName();
            if (goodsName == null) {
                continue;
            }
            if (i == 0 && goodsName.length() > maxLength) {
                productNameBuffer.append(goodsName.substring(0, maxLength) + "...");
                break;
            }
            if ((productNameBuffer.length() + goodsName.length()) > maxLength) {
                productNameBuffer.append("等");
                break;
            }
            productNameBuffer.append(goodsName + ",");
        }
        String productNames = productNameBuffer.toString();
        if (productNames.endsWith(",")) {
            productNames = productNames.substring(0, productNames.length() - 1);
        }
        if (productNames.endsWith(",等")) {
            productNames = productNames.substring(0, productNames.length() - 2) + "等";
        }
        return productNames;
    }
}