use std::collections::BTreeMap;
use reqwest::header::HeaderMap;
use ring::{digest};
use hex;
use hmac::{Hmac, Mac, NewMac};
use reqwest::Client;
use rust_decimal::Decimal;
use rust_decimal::prelude::FromPrimitive;
use rust_decimal_macros::dec;
use serde_json::Value;
use crate::http_tool::RestTool;
use crate::response_base::ResponseData;
use sha2::Sha512;
use tracing::{error, info};

#[derive(Clone)]
pub struct GateSwapRest {
    label: String,
    base_url: String,
    client: reqwest::Client,
    /*******参数*/
    //登录所需参数
    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: Client::new(),
            login_param,
            delays: vec![],
            max_delay: 0,
            avg_delay: dec!(0.0),
        }
    }

    /*******************************************************************************************************/
    /*****************************************rest请求函数********************************************************/
    /*******************************************************************************************************/
    //获取服务器当前时间
    pub async fn get_server_time(&mut self) -> ResponseData {
        let params = serde_json::json!({
         });
        let data = self.request("GET".to_string(),
                                "/api/v4".to_string(),
                                format!("/spot/time"),
                                true,
                                params.to_string(),
        ).await;
        data
    }
    //查询个人交易费率
    pub async fn wallet_fee(&mut self) -> ResponseData {
        let params = serde_json::json!({
         });
        let data = self.request("GET".to_string(),
                                "/api/v4".to_string(),
                                format!("/wallet/fee"),
                                true,
                                params.to_string(),
        ).await;
        data
    }
    //查询合约账户
    pub async fn get_account(&mut self, settle: String) -> ResponseData {
        let params = serde_json::json!({
         });
        let data = self.request("GET".to_string(),
                                "/api/v4".to_string(),
                                format!("/futures/{}/accounts", settle),
                                true,
                                params.to_string(),
        ).await;
        data
    }
    //用户仓位列表
    pub async fn get_user_position(&mut self, settle: String) -> ResponseData {
        let params = serde_json::json!({
         });
        let data = self.request("GET".to_string(),
                                "/api/v4".to_string(),
                                format!("/futures/{}/positions", settle),
                                true,
                                params.to_string(),
        ).await;
        data
    }
    //双仓模式下的持仓信息
    pub async fn get_position(&mut self, settle: String, contract: String) -> ResponseData {
        let params = serde_json::json!({
         });
        let data = self.request("GET".to_string(),
                                "/api/v4".to_string(),
                                format!("/futures/{}/dual_comp/positions/{}", settle, contract),
                                true,
                                params.to_string(),
        ).await;
        data
    }
    //获取所有合约交易行情统计
    pub async fn get_ticker(&mut self, settle: String) -> ResponseData {
        let params = serde_json::json!({
         });
        let data = self.request("GET".to_string(),
                                "/api/v4".to_string(),
                                format!("/futures/{}/tickers", settle),
                                true,
                                params.to_string(),
        ).await;
        data
    }
    //查询所有的合约信息
    pub async fn get_market_details(&mut self, settle: String) -> ResponseData {
        let params = serde_json::json!({
         });
        let data = self.request("GET".to_string(),
                                "/api/v4".to_string(),
                                format!("/futures/{}/contracts", settle),
                                true,
                                params.to_string(),
        ).await;
        data
    }
    //查询单个订单详情
    pub async fn get_order_details(&mut self, settle: String, order_id: String) -> ResponseData {
        let params = serde_json::json!({
         });
        let data = self.request("GET".to_string(),
                                "/api/v4".to_string(),
                                format!("/futures/{}/orders/{}", settle, order_id),
                                true,
                                params.to_string(),
        ).await;
        data
    }
    //查询合约订单列表
    pub async fn get_orders(&mut self, settle: String, status: String) -> ResponseData {
        let params = serde_json::json!({
            "status":status
         });
        let data = self.request("GET".to_string(),
                                "/api/v4".to_string(),
                                format!("/futures/{}/orders", settle),
                                true,
                                params.to_string(),
        ).await;
        data
    }

    //下单：side-下单方向，pos_side-持仓方向
    pub async fn order(&mut self,
                       settle: String,
                       pos_side: String,
                       side: String,
                       contract: String,
                       size: i64,
                       price: String,
                       text: String,
    ) -> ResponseData
    {
        if side != "buy" && side != "sell" {
            ResponseData::error(self.label.clone(), format!("未知下单方向！{}", side));
        }
        if pos_side != "long" && pos_side != "short" {
            ResponseData::error(self.label.clone(), format!("未知持仓方向！{}", side));
        }
        let mut param = serde_json::json!({
            "contract":contract, //合约标识
            "size":size,
            "price":price,
            "text":text,
        });
        if price == "0" {
            param.as_object_mut().unwrap().insert("tif".to_string(), serde_json::json!("ioc"));
        }
        if size == 0 {   //数量为0则平仓
            param.as_object_mut().unwrap().insert("close".to_string(), serde_json::json!(true));
        }
        match format!("{}_{}", pos_side, side).as_str() {
            "long_buy" => {//开多
                param.as_object_mut().unwrap().insert("reduce_only".to_string(), serde_json::json!(false));
            }
            "long_sell" => {//平多
                param.as_object_mut().unwrap().insert("reduce_only".to_string(), serde_json::json!(true));
            }
            "short_buy" => {//平空
                param.as_object_mut().unwrap().insert("reduce_only".to_string(), serde_json::json!(true));
            }
            "short_sell" => {//开空
                param.as_object_mut().unwrap().insert("reduce_only".to_string(), serde_json::json!(false));
            }
            _ => {} // 处理未知请求类型
        };
        // trace!("----param{}", param.to_string());
        let data = self.swap_order(settle, param).await;
        data
    }
    //合约交易下单
    pub async fn swap_order(&mut self, settle: String, params: serde_json::Value) -> ResponseData {
        let data = self.request("POST".to_string(),
                                "/api/v4".to_string(),
                                format!("/futures/{}/orders", settle),
                                true,
                                params.to_string(),
        ).await;
        data
    }
    // 提交一个自动订单
    pub async fn place_price_order(&mut self, settle: String, params: Value) -> ResponseData {
        self.request("POST".to_string(),
                     "/api/v4".to_string(),
                     format!("/futures/{}/price_orders", settle),
                     true,
                     params.to_string()).await
    }
    // 撤销自动订单
    pub async fn cancel_price_order(&mut self, settle: String, order_id: String) -> ResponseData {
        self.request("DELETE".to_string(),
                     "/api/v4".to_string(),
                     format!("/futures/{}/price_orders/{}", settle, order_id),
                     true,
                     "{}".to_string(),
        ).await
    }
    //设置持仓模式
    pub async fn setting_dual_mode(&mut self, settle: String, dual_mode: bool) -> ResponseData {
        let params = serde_json::json!({
                "dual_mode":dual_mode,
             });
        let data = self.request("POST".to_string(),
                                "/api/v4".to_string(),
                                format!("/futures/{}/dual_mode", settle),
                                true,
                                params.to_string(),
        ).await;
        data
    }
    //更新双仓模式下的杠杆
    pub async fn setting_dual_leverage(&mut self, settle: String, symbol: String, leverage: String) -> ResponseData {
        let params = serde_json::json!({
                "leverage":leverage,
             });
        let data = self.request("POST".to_string(),
                                "/api/v4".to_string(),
                                format!("/futures/{}/dual_comp/positions/{}/leverage", settle, symbol),
                                true,
                                params.to_string(),
        ).await;
        data
    }
    //交易账户互转
    pub async fn wallet_transfers(&mut self, currency: String, from: String, to: String, amount: String, settle: String) -> ResponseData {
        let params = serde_json::json!({
                "currency":currency,
                "from":from,
                "to":to,
                "amount":amount,
                "settle":settle,
             });
        let data = self.request("POST".to_string(),
                                "/api/v4".to_string(),
                                format!("/wallet/transfers"),
                                true,
                                params.to_string(),
        ).await;
        data
    }
    //撤销单个订单
    pub async fn cancel_order(&mut self, settle: String, order_id: String) -> ResponseData {
        let params = serde_json::json!({
             });

        let data = self.request("DELETE".to_string(),
                                "/api/v4".to_string(),
                                format!("/futures/{}/orders/{}", settle, order_id),
                                true,
                                params.to_string(),
        ).await;
        data
    }
    //撤销所有挂单
    pub async fn cancel_order_all(&mut self) -> ResponseData {
        let params = serde_json::json!({
             });
        let data = self.request("POST".to_string(),
                                "/api/v5".to_string(),
                                format!("/sprd/mass-cancel"),
                                true,
                                params.to_string(),
        ).await;
        data
    }

    //弃用
    pub async fn swap_bazaar_order(&mut self, text: String, origin_side: String, settle: String, contract: String, size: i64) -> ResponseData {
        let mut reduce_only = false;
        let mut param = serde_json::json!({
            "text":text,
            "contract":contract,
            "price":"0",
            "size":size,
        });

        let req = match origin_side.as_str() {
            "kd" => {
                reduce_only = false;
                true
            }
            "pd" => {
                reduce_only = true;
                true
            }
            "kk" => {
                reduce_only = false;
                true
            }
            "pk" => {
                reduce_only = true;
                true
            }
            _ => { false } // 处理未知请求类型
        };
        if req {
            param.as_object_mut().unwrap().insert("reduce_only".to_string(), serde_json::json!(reduce_only));
        }

        let data = self.swap_order(settle, param).await;
        data
    }

    //批量取消状态为 open 的订单
    pub async fn cancel_orders(&mut self, settle: String, contract: String) -> ResponseData {
        let params = serde_json::json!({
            "contract":contract
             });

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

    //查询个人成交记录
    pub async fn my_trades(&mut self, settle: String, contract: String, limit: i64, last_id: String) -> ResponseData {
        let mut params = serde_json::json!({
            "contract":contract,
            "last_id": last_id,
            "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) -> ResponseData {
        let params = serde_json::json!({
                "limit":200
             });
        let data = self.request("GET".to_string(),
                                "/api/v4".to_string(),
                                format!("/futures/{}/account_book", settle),
                                true,
                                params.to_string(),
        ).await;
        data
    }


    /*******************************************************************************************************/
    /*****************************************工具函数********************************************************/
    /*******************************************************************************************************/
    pub fn get_delays(&self) -> Vec<i64> {
        self.delays.clone()
    }
    pub fn get_avg_delay(&self) -> Decimal {
        self.avg_delay.clone()
    }
    pub fn get_max_delay(&self) -> i64 {
        self.max_delay.clone()
    }
    fn get_delay_info(&mut self) {
        let last_100 = if self.delays.len() > 100 {
            self.delays[self.delays.len() - 100..].to_vec()
        } else {
            self.delays.clone()
        };

        let max_value = last_100.iter().max().unwrap();
        if max_value.clone().to_owned() > self.max_delay {
            self.max_delay = max_value.clone().to_owned();
        }

        let sum: i64 = last_100.iter().sum();
        let sum_v = Decimal::from_i64(sum).unwrap();
        let len_v = Decimal::from_u64(last_100.len() as u64).unwrap();
        self.avg_delay = (sum_v / len_v).round_dp(1);
        self.delays = last_100.clone().into_iter().collect();
    }

    //调用请求
    async fn request(&mut self,
                     requesst_type: String,
                     prefix_url: String,
                     request_url: String,
                     is_login: bool,
                     params: String) -> ResponseData
    {
        // 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-如果需要登录则存在额外配置
        let mut body = "".to_string();
        let timestamp = chrono::Utc::now().timestamp().to_string();

        let mut headers = HeaderMap::new();
        if requesst_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 requesst_type == "POST" {
            body = params.clone();
        }

        //是否需要登录-- 组装sing
        if is_login {
            if !is_login_param {
                let e = ResponseData::error(self.label.clone(), "登录参数错误！".to_string());
                return e;
            } else {//需要登录-且登录参数齐全
                //组装sing
                let sing = Self::sign(secret_key.clone(),
                                      requesst_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 start_time = chrono::Utc::now().timestamp_millis();
        let response = self.http_tool(
            base_url.clone(),
            requesst_type.to_string(),
            params.clone(),
            headers,
        ).await;

        let time_array = chrono::Utc::now().timestamp_millis() - start_time;
        self.delays.push(time_array);
        self.get_delay_info();

        response
    }

    pub fn headers(access_key: String, timestamp: String, sign: String) -> HeaderMap {
        let mut headers = 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,
                requesst_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 = RestTool::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{}",
                              requesst_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_tool(&mut self, request_path: String, request_type: String, params: String, headers: HeaderMap) -> ResponseData {
        /****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(), RestTool::parse_params_to_str(params.clone()));

        let request_builder = match request_type.as_str() {
            "GET" => self.client.get(addrs_url.clone()).headers(headers),
            "POST" => self.client.post(addrs_url.clone()).body(params.clone()).headers(headers),
            "DELETE" => self.client.delete(addrs_url.clone()).headers(headers),
            // "PUT" => self.client.put(url.clone()).json(&params),
            _ => {
                panic!("{}", format!("错误的请求类型:{}", request_type.clone()))
            }
        };

        // 读取响应的内容
        let response = request_builder.send().await.unwrap();
        let is_success = response.status().is_success(); // 先检查状态码
        let text = response.text().await.unwrap();
        return if is_success {
            self.on_success_data(&text)
        } else {
            self.on_error_data(&text, &addrs_url, &params)
        }
    }

    pub fn on_success_data(&mut self, text: &String) -> ResponseData {
        let data = serde_json::from_str(text.as_str()).unwrap();

        ResponseData::new(self.label.clone(), 200, "success".to_string(), data)
    }

    pub fn on_error_data(&mut self, text: &String, base_url: &String, params: &String) -> ResponseData {
        let json_value = serde_json::from_str::<Value>(&text);

        match json_value {
            Ok(data) => {
                let message;

                if !data["message"].is_null() {
                    message = format!("{}:{}", data["label"].as_str().unwrap(), data["message"].as_str().unwrap());
                } else {
                    message = data["label"].to_string();
                }

                let mut error = ResponseData::error(self.label.clone(), message);
                error.message = format!("请求地址：{}, 请求参数：{}, 报错内容：{}。", base_url, params, error.message);
                error
            }
            Err(e) => {
                error!("解析错误：{:?}", e);
                let error = ResponseData::error("".to_string(),
                                                format!("json 解析失败:{}，相关参数:{}", e, text));
                error
            }
        }
    }
}