package com.nju.edu.pay.controller.api;

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.domain.AlipayTradePagePayModel;
import com.alipay.api.domain.AlipayTradeRefundModel;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.alipay.api.request.AlipayTradeRefundRequest;
import com.alipay.api.response.AlipayTradePagePayResponse;
import com.alipay.api.response.AlipayTradeRefundResponse;
import com.nju.edu.pay.configuration.AlipayProperties;
import com.nju.edu.pay.controller.dto.PayModelDTO;
import com.nju.edu.pay.data.entity.Order;
import com.nju.edu.pay.data.entity.Trade;
import com.nju.edu.pay.service.AlipayService;
import com.nju.edu.pay.service.OrderService;
import com.nju.edu.pay.service.TradeService;
import com.nju.edu.pay.util.enums.OrderStatus;
import com.nju.edu.pay.web.response.ErrorResponse;
import com.nju.edu.pay.web.response.Response;
import com.nju.edu.pay.web.response.SuccessResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Map;

@Slf4j
@RestController
@RequestMapping("/api/alipay")
public class AlipayController {

    private final AlipayProperties alipayProperties;
    private final AlipayService alipayService;
    private final OrderService orderService;
    private final TradeService tradeService;

    @Autowired
    public AlipayController(AlipayProperties alipayProperties, AlipayService alipayService, OrderService orderService, TradeService tradeService) {
        this.alipayProperties = alipayProperties;
        this.alipayService = alipayService;
        this.orderService = orderService;
        this.tradeService = tradeService;
    }

    @PostMapping("/pay")
    public Response pay(@RequestBody PayModelDTO payModelDTO) throws AlipayApiException, IOException {
        Order order=orderService.createOrder(payModelDTO.getUserId(),payModelDTO.getProductId(),payModelDTO.getPlatformType(),payModelDTO.getPrice());
        if (order==null)
            return new ErrorResponse(500,"订单创建失败");
        // 订单模型
        String productCode = "FAST_INSTANT_TRADE_PAY";
        AlipayTradePagePayModel model = new AlipayTradePagePayModel();
        model.setOutTradeNo(order.getOutTradeNo().toString());
        model.setSubject(payModelDTO.getSubject());
        model.setTotalAmount(String.valueOf(order.getPrice()));
        model.setBody(payModelDTO.getSubject()+", 共"+payModelDTO.getPrice()+"元");
        model.setProductCode(productCode);

        AlipayTradePagePayRequest pagePayRequest =new AlipayTradePagePayRequest();
        pagePayRequest.setReturnUrl(payModelDTO.getReturnUrl());
        pagePayRequest.setNotifyUrl(alipayProperties.getNotifyUrl());
        pagePayRequest.setBizModel(model);

        AlipayClient alipayClient=new DefaultAlipayClient(alipayProperties.getGatewayUrl(),alipayProperties.getAppid(),alipayProperties.getAppPrivateKey(),alipayProperties.getFormate(),alipayProperties.getCharset(),alipayProperties.getAlipayPublicKey(),alipayProperties.getSignType());
        // 调用SDK生成表单, 并直接将完整的表单html输出到页面
        AlipayTradePagePayResponse alipayTradePagePayResponse=alipayClient.pageExecute(pagePayRequest);
        if (alipayTradePagePayResponse.isSuccess()){
            return new SuccessResponse(alipayTradePagePayResponse.getBody());
        }else {
            order.setStatus(OrderStatus.FAILED);
            orderService.updateOrder(order);
            return new ErrorResponse(500,"调用支付失败");
        }
    }

    @RequestMapping("/notify")
    public String notify(HttpServletRequest request) throws AlipayApiException, UnsupportedEncodingException {
        // 一定要验签，防止黑客篡改参数
        Map<String, String[]> parameterMap = request.getParameterMap();
        StringBuilder notifyBuild = new StringBuilder("/****************************** alipay notify ******************************/\n");
        parameterMap.forEach((key, value) -> notifyBuild.append(key + "=" + value[0] + "\n") );
        log.info(notifyBuild.toString());

        boolean flag = alipayService.verifySign(request);
        if (flag) {
            /**
             * 需要严格按照如下描述校验通知数据的正确性
             *
             * 商户需要验证该通知数据中的out_trade_no是否为商户系统中创建的订单号，
             * 并判断total_amount是否确实为该订单的实际金额（即商户订单创建时的金额），
             * 同时需要校验通知中的seller_id（或者seller_email) 是否为out_trade_no这笔单据的对应的操作方（有的时候，一个商户可能有多个seller_id/seller_email），
             *
             * 上述有任何一个验证不通过，则表明本次通知是异常通知，务必忽略。
             * 在上述验证通过后商户必须根据支付宝不同类型的业务通知，正确的进行不同的业务处理，并且过滤重复的通知结果数据。
             * 在支付宝的业务通知中，只有交易通知状态为TRADE_SUCCESS或TRADE_FINISHED时，支付宝才会认定为买家付款成功。
             */

            //交易状态
            String tradeStatus = new String(request.getParameter("trade_status").getBytes("ISO-8859-1"),"UTF-8");
            // 商户订单号
            String out_trade_no = new String(request.getParameter("out_trade_no").getBytes("ISO-8859-1"),"UTF-8");
            //支付宝交易号
            String trade_no = new String(request.getParameter("trade_no").getBytes("ISO-8859-1"),"UTF-8");
            //付款金额
            String total_amount = new String(request.getParameter("total_amount").getBytes("ISO-8859-1"),"UTF-8");
            //商户ID
            String seller_id = new String(request.getParameter("seller_id").getBytes("ISO-8859-1"),"UTF-8");

            Order order=orderService.retrieveOrder(Integer.parseInt(out_trade_no));
            if (order==null)
                return "failed";

            if (order.getPrice() == Double.parseDouble(total_amount)&& alipayProperties.getSellerId().equals(seller_id)) {
                tradeService.createTrade(Integer.parseInt(out_trade_no), trade_no);
            }

            if (tradeStatus.equals("TRADE_SUCCESS")||tradeStatus.equals("TRADE_FINISHED") ){

                System.out.println("notify trade success called");
                order.setStatus(OrderStatus.SUCCESS);
                orderService.updateOrder(order);
                return "success";
            }else {
                order.setStatus(OrderStatus.FAILED);
                orderService.updateOrder(order);
            }
        }

        return "fail";
    }

    @RequestMapping("/return")
    public String returnUrl(HttpServletRequest request) throws UnsupportedEncodingException {

        boolean verifyResult = alipayService.verifySign(request);
        if(verifyResult){
            //验证成功
            //请在这里加上商户的业务逻辑程序代码，如保存支付宝交易号
            //商户订单号
            String out_trade_no = new String(request.getParameter("out_trade_no").getBytes("ISO-8859-1"),"UTF-8");
            //支付宝交易号
            String trade_no = new String(request.getParameter("trade_no").getBytes("ISO-8859-1"),"UTF-8");

            System.out.println("returnUrl called");
            return "PaySuccess";

        }else{
            return "PayFail";

        }
    }

    @PostMapping("/refund/{outTradeNo}")
    public Response refund(@PathVariable Integer outTradeNo) throws AlipayApiException {
        AlipayTradeRefundRequest alipayRequest = new AlipayTradeRefundRequest();

        Order order=orderService.retrieveOrder(outTradeNo);
        Trade trade=tradeService.retrieveTrade(outTradeNo);
        AlipayTradeRefundModel model=new AlipayTradeRefundModel();
        // 商户订单号
        model.setOutTradeNo(outTradeNo.toString());
        //支付宝订单号
        model.setTradeNo(String.valueOf(trade.getTradeNo()));
        // 退款金额
        model.setRefundAmount(String.valueOf(order.getPrice()));
        // 退款原因
        model.setRefundReason("无理由退款");
        // 退款订单号(同一个订单可以分多次部分退款，当分多次时必传)
//        model.setOutRequestNo(UUID.randomUUID().toString());
        alipayRequest.setBizModel(model);

        AlipayClient alipayClient=new DefaultAlipayClient(alipayProperties.getGatewayUrl(),alipayProperties.getAppid(),alipayProperties.getAppPrivateKey(),alipayProperties.getFormate(),alipayProperties.getCharset(),alipayProperties.getAlipayPublicKey(),alipayProperties.getSignType());
        AlipayTradeRefundResponse alipayResponse = alipayClient.execute(alipayRequest);
        if (alipayResponse.isSuccess()) {
            order.setStatus(OrderStatus.REFUND);
            orderService.updateOrder(order);
            return new SuccessResponse(alipayResponse.getBody());
        }

        return new ErrorResponse(500,"退款失败");
    }
}