package <%=packageName%>.web.rest.standalone;

import cn.binarywang.wx.miniapp.api.WxMaService;
import cn.binarywang.wx.miniapp.bean.WxMaMessage;
import cn.binarywang.wx.miniapp.constant.WxMaConstants;
import <%=packageName%>.service.standalone.WxMaConfigService;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.*;

import java.util.Objects;

@RestController
@RequestMapping("/wx/portal/{appid}")
public class WxPortalController {
    private final Logger log = LoggerFactory.getLogger(WxPortalController.class);

    private final WxMaConfigService wxMaConfigService;

    public WxPortalController(WxMaConfigService wxMaConfigService) {
        this.wxMaConfigService = wxMaConfigService;
    }

    @GetMapping(produces = "text/plain;charset=utf-8")
    public String authGet(@PathVariable String appid,
                          @RequestParam(name = "signature", required = false) String signature,
                          @RequestParam(name = "timestamp", required = false) String timestamp,
                          @RequestParam(name = "nonce", required = false) String nonce,
                          @RequestParam(name = "echostr", required = false) String echostr) {
        this.log.info("\n接收到来自微信服务器的认证消息：signature = [{}], timestamp = [{}], nonce = [{}], echostr = [{}]",
            signature, timestamp, nonce, echostr);

        if (StringUtils.isAnyBlank(signature, timestamp, nonce, echostr)) {
            throw new IllegalArgumentException("请求参数非法，请核实!");
        }

        final WxMaService wxService = wxMaConfigService.getMaService(appid);

        if (wxService.checkSignature(timestamp, nonce, signature)) {
            return echostr;
        }
        return "非法请求";
    }

    @PostMapping(produces = "application/xml; charset=UTF-8")
    public String post(@PathVariable String appid,
                       @RequestBody String requestBody,
                       @RequestParam("msg_signature") String msgSignature,
                       @RequestParam("encrypt_type") String encryptType,
                       @RequestParam("signature") String signature,
                       @RequestParam("timestamp") String timestamp,
                       @RequestParam("nonce") String nonce) {
        this.log.info("\n接收微信请求：[msg_signature=[{}], encrypt_type=[{}], signature=[{}]," +
                " timestamp=[{}], nonce=[{}], requestBody=[\n{}\n] ",
            msgSignature, encryptType, signature, timestamp, nonce, requestBody);

        final WxMaService wxService = wxMaConfigService.getMaService(appid);

        final boolean isJson = Objects.equals(wxService.getWxMaConfig().getMsgDataFormat(),
            WxMaConstants.MsgDataFormat.JSON);
        if (StringUtils.isBlank(encryptType)) {
            // 明文传输的消息
            WxMaMessage inMessage;
            if (isJson) {
                inMessage = WxMaMessage.fromJson(requestBody);
            } else {//xml
                inMessage = WxMaMessage.fromXml(requestBody);
            }

            this.route(inMessage,appid);
            return "success";
        }

        if ("aes".equals(encryptType)) {
            // 是aes加密的消息
            WxMaMessage inMessage;
            if (isJson) {
                inMessage = WxMaMessage.fromEncryptedJson(requestBody, wxService.getWxMaConfig());
            } else {//xml
                inMessage = WxMaMessage.fromEncryptedXml(requestBody, wxService.getWxMaConfig(),
                    timestamp, nonce, msgSignature);
            }

            this.route(inMessage, appid);
            return "success";
        }

        throw new RuntimeException("不可识别的加密类型：" + encryptType);
    }

    private void route(WxMaMessage message, String appid) {
        try {
            wxMaConfigService.getRouters().get(appid).route(message);
        } catch (Exception e) {
            this.log.error(e.getMessage(), e);
        }
    }
}
