use std::collections::BTreeMap;

use hex;
use hmac::{Hmac, Mac, NewMac};
use ring::digest;
use rust_decimal::Decimal;
use rust_decimal_macros::dec;
use serde_json::Value;
use sha2::Sha512;
use tracing::info;
use crate::http::request::Response;
use crate::utils::utils::parse_params_to_str;


#[derive(Clone)]
#[allow(dead_code)]
pub struct GateSwapRest {
    label: String,
    base_url: String,
    client: reqwest::Client,
    /*******参数*/
    //登陆所需参数
    login_param: BTreeMap<String, String>,
    delays: Vec<i64>,
    max_delay: i64,
    avg_delay: Decimal,
}

impl GateSwapRest {
    /*******************************************************************************************************/
    /*****************************************获取一个对象****************************************************/
    /*******************************************************************************************************/
    pub fn new(is_colo: bool, login_param: BTreeMap<String, String>) -> GateSwapRest
    {
        return GateSwapRest::new_label("default-GateSwapRest".to_string(), is_colo, login_param);
    }
    pub fn new_label(label: String, is_colo: bool, login_param: BTreeMap<String, String>) -> GateSwapRest
    {
        let base_url = if is_colo {
            let url = "https://apiv4-private.gateapi.io".to_string();
            info!("开启高速通道:{:?}",url);
            url
        } else {
            let url = "https://api.gateio.ws".to_string();
            info!("走普通通道：{}",url);
            url
        };


        if is_colo {} else {}
        /*****返回结构体*******/
        GateSwapRest {
            label,
            base_url: base_url.to_string(),
            client: reqwest::Client::new(),
            login_param,
            delays: vec![],
            max_delay: 0,
            avg_delay: dec!(0.0),
        }
    }

    /*******************************************************************************************************/
    /*****************************************rest请求函数********************************************************/
    //查询个人成交记录
    pub async fn my_trades(&mut self, settle: String, contract: String, limit: i64) -> Response {
        let mut params = serde_json::json!({
            "contract":contract,
            "limit":1000
        });
        if limit > 0 {
            params["limit"] = serde_json::json!(limit);
        }

        let data = self.request("GET".to_string(),
                                "/api/v4".to_string(),
                                format!("/futures/{}/my_trades", settle),
                                true,
                                params.to_string(),
        ).await;
        data
    }

    //查询合约账户变更历史
    pub async fn account_book(&mut self, settle: String, start_time: i64, end_time: i64) -> Response {
        let params = serde_json::json!({
            "limit":1000,
            "from":start_time-60*60*24*5,
            "to":end_time
        });
        let data = self.request("GET".to_string(),
                                "/api/v4".to_string(),
                                format!("/futures/{}/account_book", settle),
                                true,
                                params.to_string(),
        ).await;
        data
    }
    pub async fn fill_account_book(&mut self, settle: String, _start_time: i64, end_time: i64) -> Response {
        let params = serde_json::json!({
            "limit":1,
            "from":end_time-60*60*24*30,
            "to":end_time
        });
        let data = self.request("GET".to_string(),
                                "/api/v4".to_string(),
                                format!("/futures/{}/account_book", settle),
                                true,
                                params.to_string(),
        ).await;
        data
    }

    //调用请求
    async fn request(&mut self,
                     request_type: String,
                     prefix_url: String,
                     request_url: String,
                     is_login: bool,
                     params: String) -> Response
    {
        // trace!("login_param:{:?}", self.login_param);
        //解析账号信息
        let mut access_key = "".to_string();
        let mut secret_key = "".to_string();
        if self.login_param.contains_key("access_key") {
            access_key = self.login_param.get("access_key").unwrap().to_string();
        }
        if self.login_param.contains_key("secret_key") {
            secret_key = self.login_param.get("secret_key").unwrap().to_string();
        }
        let mut is_login_param = true;
        if access_key == "" || secret_key == "" {
            is_login_param = false
        }

        //请求头配置-如果需要登陆则存在额外配置
        let mut body = "".to_string();
        let timestamp = chrono::Utc::now().timestamp().to_string();

        let mut headers = reqwest::header::HeaderMap::new();
        if request_type == "GET" {
            headers.insert("Content-type", "application/x-www-form-urlencoded".parse().unwrap());
            headers.insert("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) ".parse().unwrap());
        } else {
            headers.insert("Accept", "application/json".parse().unwrap());
            headers.insert("Content-Type", "application/json".parse().unwrap());
        }

        if request_type == "POST" {
            body = params.clone();
        }

        //是否需要登陆-- 组装sing
        if is_login {
            if !is_login_param {
                let mut res = Response::new();
                res.code = "-1".to_string();
                res.msg = "登陆参数错误".to_string();
                return res;
            } else {//需要登陆-且登陆参数齐全
                //组装sing
                let sing = Self::sign(secret_key.clone(),
                                      request_type.clone(),
                                      prefix_url.clone(),
                                      request_url.clone(),
                                      params.clone(),
                                      body.clone(),
                                      timestamp.clone(),
                );
                // trace!("sing:{}", sing);
                //组装header
                headers.extend(Self::headers(access_key, timestamp, sing));
            }
        }

        // trace!("headers:{:?}", headers);
        let base_url = format!("{}{}", prefix_url.clone(), request_url.clone());
        let get_response = self.http_toll(
            base_url.clone(),
            request_type.to_string(),
            params.clone(),
            headers,
        ).await;
        let res_data = Self::res_data_analysis(get_response, base_url, params);
        res_data
    }

    pub fn headers(access_key: String, timestamp: String, sign: String) -> reqwest::header::HeaderMap {
        let mut headers = reqwest::header::HeaderMap::new();
        headers.insert("KEY", access_key.clone().parse().unwrap());
        headers.insert("Timestamp", timestamp.clone().parse().unwrap());
        headers.insert("SIGN", sign.clone().parse().unwrap());
        headers
    }
    pub fn sign(secret_key: String,
                request_type: String, prefix_url: String, request_url: String,
                params: String, body_data: String, timestamp: String) -> String
    {
        let url = format!("{}{}", prefix_url, request_url);
        let params_str = parse_params_to_str(params);
        let body = Some(body_data);
        let hashed_payload = if let Some(body) = body {
            let mut m = digest::Context::new(&digest::SHA512);
            m.update(body.as_bytes());
            hex::encode(m.finish().as_ref())
        } else {
            String::new()
        };
        // trace!("hashed_payload:{}", hashed_payload);

        let message = format!("{}\n{}\n{}\n{}\n{}",
                              request_type,
                              url,
                              params_str,
                              hashed_payload,
                              timestamp);
        // trace!("**********", );
        // trace!("组装数据：{}", message);
        // trace!("**********", );

        let mut mac = Hmac::<Sha512>::new_varkey(secret_key.as_bytes()).expect("Failed to create HMAC");
        mac.update(message.as_bytes());
        let result = mac.finalize().into_bytes();
        let sign = hex::encode(result);
        sign
    }


    async fn http_toll(&mut self, request_path: String, request_type: String, params: String, headers: reqwest::header::HeaderMap) -> Result<Response, reqwest::Error> {
        /****请求接口与 地址*/
        let url = format!("{}{}", self.base_url.to_string(), request_path);
        let request_type = request_type.clone().to_uppercase();
        let addrs_url = format!("{}?{}", url.clone(), parse_params_to_str(params.clone()));
        // let params_json: serde_json::Value = serde_json::from_str(&params).unwrap();
        // trace!("url:{}",url);
        // trace!("addrs_url:{}",url);
        // trace!("params_json:{}",params_json);
        // trace!("headers:{:?}",headers);

        let req = match request_type.as_str() {
            "GET" => self.client.get(addrs_url.clone()).headers(headers),
            "POST" => self.client.post(addrs_url.clone()).body(params).headers(headers),
            "DELETE" => self.client.delete(addrs_url.clone()).headers(headers),
            // "PUT" => self.client.put(url.clone()).json(&params),
            _ => {
                let mut res = Response::new();
                res.code = "-1".to_string();
                res.msg = "请求类型错误".to_string();
                res.data = "".to_string();
                return Ok(res);
            }
        };

        let response = req.send().await?;
        let mut res = Response::new();
        if response.status().is_success() {
            // 读取响应的内容
            let body = response.text().await?;
            res.code = "200".to_string();
            res.msg = "success".to_string();
            res.data = body;
            // trace!("ok-----{}", body);
        } else {
            let body = response.text().await?;
            res.code = "-1".to_string();
            res.msg = body;
            res.data = "".to_string();
        }
        Ok(res)
    }

    //res_data 解析
    pub fn res_data_analysis(result: Result<Response, reqwest::Error>, base_url: String, params: String) -> Response {
        let res = Response::new();
        match result {
            Ok(res_data) => {
                // info!("原数据：{:?}",res_data);
                if res_data.code != "200" {
                    let message = res_data.msg;
                    // let json_value: serde_json::Value = serde_json::from_str(&message).unwrap();//这种方式会触发 解析错误
                    let json_value = serde_json::from_str::<Value>(&message);
                    match json_value {
                        Ok(_data) => {
                            let mut error = Response::new();
                            error.code = "-1".to_string();
                            error.msg = format!("请求错误{:?}", res.msg);
                            error.data = format!("请求地址：{},请求参数：{}", base_url, params);
                            error
                        }
                        Err(e) => {
                            // error!("解析错误：{:?}",e);
                            let mut error = Response::new();
                            error.code = "-1".to_string();
                            error.msg = format!("json 解析失败:{}，相关参数:{}", e, message);
                            error.data = "".to_string();
                            error
                        }
                    }
                } else {
                    res_data
                }
            }
            Err(err) => {
                let mut error = Response::new();
                error.code = "-1".to_string();
                error.msg = format!("json 解析失败:{}，相关参数:{}", err, params);
                error.data = "".to_string();
                error
            }
        }
    }
}