package com.ruoyi.device.uav.service;

import com.dtflys.forest.exceptions.ForestNetworkException;
import com.dtflys.forest.exceptions.ForestRuntimeException;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.ruoyi.utils.forest.UavClient;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.codec.binary.Base64;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpMethod;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.annotation.PostConstruct;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Map;

@Service
@Slf4j(topic = "uav")
public class UavService {
    public static final String USERNAME = "ardbailu";//用户名
    public static final String PASSWORD = "ardkj12345";//密码
    public static final String SALT = "0123456789012345";//盐

    //token 登陆后每次请求,在header中携带
    private String token;//登录成功返回的token
    private Map uavUser;//登录的用户信息
    private ObjectMapper om = new ObjectMapper();
    @Autowired
    private UavClient uavClient;

    @PostConstruct
    public void created() {
        this.login();
    }

    public String doUavRequest(HttpMethod method, String url, String data) {
        String res = null;
        Method requestMethod = null;
        //获取method
        try {
            requestMethod = UavClient.class.getMethod(method.name(), String.class, String.class, String.class);
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        }
        //执行method
        try {
            res = (String) requestMethod.invoke(this.uavClient, url, this.token, data);
        } catch (InvocationTargetException e) {
            ForestNetworkException fe = (ForestNetworkException) e.getCause();
            if (fe.getStatusCode() == 401) {//token失效,重新登录
                this.login();
            }
            try {//再次调用接口
                res = (String) requestMethod.invoke(this.uavClient, url, this.token, data);
            } catch (IllegalAccessException ex) {
                ex.printStackTrace();
            } catch (InvocationTargetException ex) {
                ex.printStackTrace();
            }
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        }

        return res;
    }

    public Map getUavUser() {
        if (this.uavUser == null) {
            this.login();
        }
        return this.uavUser;
    }

    public void login() {
        log.debug("登录无人机外部接口");
        String codedPassword = this.Encrypt(PASSWORD, SALT);
        String body = "{\"username\":\"" + USERNAME + "\",\"password\":\"" + codedPassword + "\"}";
        try {
            String res = uavClient.POST("login", null, body);
            Map resMap = om.readValue(res, Map.class);
            this.uavUser = (Map) resMap.get("data");
            if (this.uavUser != null) {
                this.token = (String) this.uavUser.get("access_token");
            }
        } catch (ForestRuntimeException e) {
            log.error("无人机连接超时" + e.getMessage());
        } catch (JsonMappingException e) {
            e.printStackTrace();
        } catch (JsonProcessingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


    public String Encrypt(String sSrc, String sKey) {
        if (sKey == null) {
            return null;
        }
        // 判断Key是否为16位
        if (sKey.length() != 16) {
            return null;
        }
        byte[] encrypted = null;
        try {
            byte[] raw = sKey.getBytes("utf-8");
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//"算法/模式/补码方式"
            cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
            encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));
        } catch (Exception e) {
            e.printStackTrace();
        }
        return new Base64().encodeToString(encrypted);//此处使用BASE64做转码功能，同时能起到2次加密的作用。
    }
}