use crate::database_control::*;
use hex::ToHex;
use hmac_sha256::HMAC;
use reqwest::{Client, ClientBuilder, Response};
use rust_decimal::{prelude::FromPrimitive, prelude::ToPrimitive, Decimal, RoundingStrategy};
use serde::Deserialize;
use serde_json::Value;
use sqlx::{Error, FromRow};
use std::borrow::{Borrow, BorrowMut};
use std::collections::HashSet;
use std::sync::Arc;
use std::collections::HashMap;
use tokio::{join, sync::Mutex, time::*};
use log;

#[derive(Debug, Clone)]
pub struct TradeFee {
    pub makercommission: Decimal,
    pub takercommission: Decimal,
}

impl TradeFee {
    fn new() -> TradeFee {
        let a = TradeFee {
            makercommission: Decimal::new(0, 8),
            takercommission: Decimal::new(0, 8),
        };
        a
    }
}

#[derive(Debug, FromRow, Clone)]
pub struct ExchangeInfo {
    pub stepsize: Decimal,
    pub ticksize: Decimal,
    pub base_asset_precision: u32,
    pub base_commission_precision: u32,
    pub quote_asset_precision: u32,
    pub quote_commission_precision: u32,
}

impl ExchangeInfo {
    fn new() -> ExchangeInfo {
        let a = ExchangeInfo {
            stepsize: Decimal::new(0, 8),
            ticksize: Decimal::new(0, 8),
            base_asset_precision: 0,
            base_commission_precision: 0,
            quote_asset_precision: 0,
            quote_commission_precision: 0,
        };
        a
    }
}

// request all coin price (/api, Weight(IP) 2)
// request_all_coin_price -> de_all_coin_price_json -> store_coin_price_db
// pub async fn request_all_coin_price(client: &Client, price_vec: &Arc<Mutex<Vec<(String, f64)>>>) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
pub async fn request_all_coin_price(
    client: &Client,
    price_vec: &mut HashMap<String, f64>,
) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
    let url = "https://api.binance.com/api/v3/ticker/price";
    let mut response = client.get(url).send().await?;

    let mut body = response.text_with_charset("utf-8").await?;

    de_all_coin_price_json(&body, price_vec).await?;

    Ok(())
}

async fn de_all_coin_price_json(
    body: &String,
    price_vec: &mut HashMap<String, f64>,
) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
    let v: Value = serde_json::from_str(body.as_str())?;
    let into_vec = v.as_array();
    if into_vec == None {
        return Err("Err")?;
    }
    let mut object_map = &serde_json::map::Map::new();

    let mut symbol = String::new();
    let mut price = 0.0;
    for element in into_vec.unwrap() {
        object_map = element.as_object().unwrap();
        let mut object_map_iter = object_map.iter();

        for element in object_map_iter {
            match element.0.as_str() {
                "symbol" => symbol = element.1.as_str().unwrap().to_string(),
                "price" => price = element.1.as_str().unwrap().parse::<f64>().unwrap(),
                _ => {
                    log::error!("Elements in body msg are changed. Please update both your coinprices table and vectors.");
                }
            }
            price_vec.insert(symbol.clone(), price);
        }
    }
    Ok(())
}

// request trade fee (/sapi, Weight(IP) 1)
// request_trade_fee -> deserialization_trade_fee_json -> save_db_trade_fee
pub async fn request_trade_fee(
    api_key: &str,
    secret_key: &str,
    local_epoch: u128,
    difference_epoch: i64,
    client: &Client,
    tradefee_vec: &mut HashMap<String, TradeFee>,
) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
    let mut base_url = String::from("https://api.binance.com/sapi/v1/asset/tradeFee?");

    // local 시간이 server 시간보다 너무 앞서거나 뒤쳐지면 USER_DATA를 요청할 수 없으므로 local과 server 의 시간 차이만큼을 local에서 빼어 보정한 뒤
    // 이를 timestamp로 사용한다.
    let mut timestamp;
    if difference_epoch >= 0 {
        timestamp = (local_epoch - difference_epoch as u128).to_string();
    } else if difference_epoch < 0 {
        timestamp = (local_epoch - (difference_epoch * -1) as u128).to_string();
    } else {
        timestamp = local_epoch.to_string();
    }
    let recv_window_size = "20000".to_string(); // default: 5,000ms, Max: 60,000ms

    let mut query_string = String::from("&timestamp=");
    query_string.push_str(&timestamp);
    query_string.push_str("&recvWindow=");
    query_string.push_str(&recv_window_size);

    let signature = HMAC::mac(&query_string.as_bytes(), secret_key.as_bytes());

    query_string.push_str("&signature=");
    base_url.push_str(&query_string);
    base_url.push_str(signature.encode_hex::<String>().as_str());

    let mut response = client
        .get(&base_url)
        .header("X-MBX-APIKEY", api_key)
        .send()
        .await?;

    while !response.status().is_success() {
        sleep(Duration::from_secs(5)).await;
        response = client
            .get(&base_url)
            .header("X-MBX-APIKEY", api_key)
            .send()
            .await?;
    }

    let mut body = response.text_with_charset("utf-8").await;

    match body {
        Ok(T) => {
            de_trade_fee_json(&T, tradefee_vec).await?;
            // println!("tradefee 완료");
        }
        Err(E) => {
            log::warn!("request_trade_fee body failed!: {:?}", E);
        }
    }

    Ok(())
}

async fn de_trade_fee_json(
    body: &String,
    tradefee_map: &mut HashMap<String, TradeFee>,
) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
    let v: Value = serde_json::from_str(body.as_str())?;

    let into_vec = v.as_array();
    if into_vec == None {
        return Err("Err")?;
    }
    let mut object_map = &serde_json::map::Map::new();
    let mut tradefee_map_build: HashMap<String, TradeFee> = HashMap::new();
    let mut symbol = String::new();
    let mut tradefee_data = TradeFee::new();
    for element in into_vec.unwrap() {
        object_map = element.as_object().unwrap();

        let mut object_map_iter = object_map.iter();
        
        for element in object_map_iter {
            match element.0.as_str() {
                "symbol" => symbol = element.1.as_str().unwrap().to_string(),
                "makerCommission" => {
                    tradefee_data.makercommission =
                        rust_decimal::prelude::FromStr::from_str(element.1.as_str().unwrap())
                            .unwrap()
                }
                "takerCommission" => {
                    tradefee_data.takercommission =
                        rust_decimal::prelude::FromStr::from_str(element.1.as_str().unwrap())
                            .unwrap()
                }
                _ => {
                    log::error!("Elements in body msg are changed. Please update both your tradefees table and vectors.");
                }
            }
        }
        tradefee_map_build.insert(symbol.clone(), tradefee_data.clone()); 
    }
    *tradefee_map = tradefee_map_build;
    Ok(())
}

// request 24hr Ticker Price Change Statistics (Weight(IP) 1 for a single symbol, 40 when the symbol parameter is omitted)
// request_24hr_ticker_price_change_statistics -> deserialization_24hr_ticker_price_change_statistics_json ->
pub async fn request_24hr_ticker_price_change_statistics(
    client: &Client,
) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
    let mut response = client
        .get("https://api.binance.com/api/v3/ticker/24hr")
        .send()
        .await;

    match response {
        Ok(T) => {
            let mut body = T.text_with_charset("utf-8").await;
            match body {
                Ok(T) => {
                    de_24h_change_json(&T).await?;
                    // println!("24h change 완료");
                }
                Err(E) => {
                    log::warn!(
                        "request_24hr_ticker_price_change_statistics body failed!: {:?}",
                        E
                    );
                }
            }
        }
        Err(E) => {
            log::warn!(
                "request_24hr_ticker_price_change_statistics response failed!: {:?}",
                E
            );
        }
    }
    Ok(())
}

async fn de_24h_change_json(body: &String) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
    let v: Value = serde_json::from_str(body.as_str())?;
    let mut into_vec = v.as_array();
    if into_vec == None {
        return Err("Err")?;
    }
    let mut object_map = &serde_json::map::Map::new();

    let columns = vec![
        "symbol",
        "priceChange",
        "priceChangePercent",
        "weightedAvgPrice",
        "prevClosePrice",
        "lastPrice",
        "lastQty",
        "bidPrice",
        "bidQty",
        "askPrice",
        "askQty",
        "openPrice",
        "highPrice",
        "lowPrice",
        "volume",
        "quoteVolume",
        "openTime",
        "closeTime",
        "firstId",
        "lastId",
        "count",
    ];
    let mut value_wrapper: Vec<Vec<String>> = Vec::new();

    for element in into_vec.unwrap() {
        object_map = element.as_object().unwrap();

        let mut value_vec = vec![String::new(); 21];

        let mut object_map_iter = object_map.iter();

        for element in object_map_iter {
            match element.0.as_str() {
                "symbol" => value_vec[0] = element.1.as_str().unwrap().to_string(),
                "priceChange" => value_vec[1] = element.1.as_str().unwrap().to_string(),
                "priceChangePercent" => value_vec[2] = element.1.as_str().unwrap().to_string(),
                "weightedAvgPrice" => value_vec[3] = element.1.as_str().unwrap().to_string(),
                "prevClosePrice" => value_vec[4] = element.1.as_str().unwrap().to_string(),
                "lastPrice" => value_vec[5] = element.1.as_str().unwrap().to_string(),
                "lastQty" => value_vec[6] = element.1.as_str().unwrap().to_string(),
                "bidPrice" => value_vec[7] = element.1.as_str().unwrap().to_string(),
                "bidQty" => value_vec[8] = element.1.as_str().unwrap().to_string(),
                "askPrice" => value_vec[9] = element.1.as_str().unwrap().to_string(),
                "askQty" => value_vec[10] = element.1.as_str().unwrap().to_string(),
                "openPrice" => value_vec[11] = element.1.as_str().unwrap().to_string(),
                "highPrice" => value_vec[12] = element.1.as_str().unwrap().to_string(),
                "lowPrice" => value_vec[13] = element.1.as_str().unwrap().to_string(),
                "volume" => value_vec[14] = element.1.as_str().unwrap().to_string(),
                "quoteVolume" => value_vec[15] = element.1.as_str().unwrap().to_string(),
                "openTime" => value_vec[16] = element.1.as_i64().unwrap().to_string(),
                "closeTime" => value_vec[17] = element.1.as_i64().unwrap().to_string(),
                "firstId" => value_vec[18] = element.1.as_i64().unwrap().to_string(),
                "lastId" => value_vec[19] = element.1.as_i64().unwrap().to_string(),
                "count" => value_vec[20] = element.1.as_i64().unwrap().to_string(),
                _ => {
                    log::error!("Elements in body msg are changed. Please update both your 24h_change table and vectors.");
                }
            }
        }
        value_wrapper.push(value_vec);
    }

    store_24h_change_db(columns, value_wrapper).await?;
    Ok(())
}

async fn store_24h_change_db(
    columns: Vec<&str>,
    value_wrapper: Vec<Vec<String>>,
) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
    let table_name = String::from("all_24h_change");
    delete_all_rows(&table_name).await?;
    insert_records(&table_name, &columns, &value_wrapper).await?;
    Ok(())
}

// request exchange information. (/api, Weight(IP) 10)
pub async fn request_exchange_infomation(
    client: &Client,
    exchange_info_map: &mut HashMap<String, ExchangeInfo>,
) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
    // building URL and API-keys
    let mut url = String::new();

    url.push_str("https://api.binance.com");

    let endpoint_url = "/api/v3/exchangeInfo";
    url.push_str(endpoint_url);

    let mut res = client.get(&url).send().await?;

    while !res.status().is_success() {
        sleep(Duration::from_secs(5)).await;
        res = client.get(&url).send().await?;
    }

    let body = res.text_with_charset("utf-8").await?;

    // deserialize JSON
    let v: Value = serde_json::from_str(body.as_str())?;
    let mut into_vec = v.as_object();
    if into_vec == None {
        return Err("Err")?;
    }

    let mut symbol = String::new();
    let mut exchange_info = ExchangeInfo::new();
    let mut data_map_temp: HashMap<String, ExchangeInfo> = HashMap::new();

    for element in into_vec.unwrap() {
        if element.0.contains("symbols") {
            for element in element.1.as_array().unwrap() {
                if element.is_object() {
                    if element
                        .get("symbol")
                        .unwrap()
                        .as_str()
                        .unwrap()
                        .ends_with("USDT")
                    {
                        symbol =
                            (element.get("symbol").unwrap().as_str().unwrap().to_string());
                        exchange_info.base_asset_precision =
                            (element.get("baseAssetPrecision").unwrap().as_u64().unwrap()) as u32;
                        exchange_info.base_commission_precision = (element
                            .get("baseCommissionPrecision")
                            .unwrap()
                            .as_u64()
                            .unwrap())
                            as u32;
                        exchange_info.quote_asset_precision = (element
                            .get("quoteAssetPrecision")
                            .unwrap()
                            .as_u64()
                            .unwrap())
                            as u32;
                        exchange_info.quote_commission_precision = (element
                            .get("quoteCommissionPrecision")
                            .unwrap()
                            .as_u64()
                            .unwrap())
                            as u32;
                        for element in element.get("filters").unwrap().as_array().unwrap() {
                            if element
                                .as_object()
                                .unwrap()
                                .get("filterType")
                                .unwrap()
                                .as_str()
                                .unwrap()
                                .starts_with("LOT_SIZE")
                            {
                                exchange_info.stepsize = rust_decimal::prelude::FromStr::from_str(
                                    element.get("stepSize").unwrap().as_str().unwrap(),
                                )
                                .unwrap();
                            } else if element
                                .as_object()
                                .unwrap()
                                .get("filterType")
                                .unwrap()
                                .as_str()
                                .unwrap()
                                .starts_with("PRICE_FILTER")
                            {
                                exchange_info.ticksize = rust_decimal::prelude::FromStr::from_str(
                                    element.get("tickSize").unwrap().as_str().unwrap(),
                                )
                                .unwrap();
                            }
                        }
                        data_map_temp.insert(symbol.clone(), exchange_info.clone());
                    }
                }
            }
        }
    }

    *exchange_info_map = data_map_temp;

    Ok(())
}

pub async fn request_delist_symbols(
    api_key: &str,
    secret_key: &str,
    local_epoch: u128,
    difference_epoch: i64,
    client: &Client
) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
    let mut base_url = String::from("https://api.binance.com/sapi/v1/spot/delist-schedule?");

    // local 시간이 server 시간보다 너무 앞서거나 뒤쳐지면 USER_DATA를 요청할 수 없으므로 local과 server 의 시간 차이만큼을 local에서 빼어 보정한 뒤
    // 이를 timestamp로 사용한다.
    let mut timestamp;
    if difference_epoch >= 0 {
        timestamp = (local_epoch - difference_epoch as u128).to_string();
    } else if difference_epoch < 0 {
        timestamp = (local_epoch - (difference_epoch * -1) as u128).to_string();
    } else {
        timestamp = local_epoch.to_string();
    }
    let recv_window_size = "20000".to_string(); // default: 5,000ms, Max: 60,000ms

    let mut query_string = String::from("&timestamp=");
    query_string.push_str(&timestamp);
    query_string.push_str("&recvWindow=");
    query_string.push_str(&recv_window_size);

    let signature = HMAC::mac(&query_string.as_bytes(), secret_key.as_bytes());

    query_string.push_str("&signature=");
    base_url.push_str(&query_string);
    base_url.push_str(signature.encode_hex::<String>().as_str());

    let mut response = client
        .get(&base_url)
        .header("X-MBX-APIKEY", api_key)
        .send()
        .await?;

    while !response.status().is_success() {
        sleep(Duration::from_secs(5)).await;
        response = client
            .get(&base_url)
            .header("X-MBX-APIKEY", api_key)
            .send()
            .await?;
    }

    let mut body = response.text_with_charset("utf-8").await;
    match body {
        Ok(T) => {
            de_deilst_symbol_json(&T).await?;
        }
        Err(E) => {
            log::warn!("request_delist_symbols body failed!: {:?}", E);
        }
    }

    Ok(())
}

async fn de_deilst_symbol_json(
    body: &String,
) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
    let v: Value = serde_json::from_str(body.as_str())?;

    let into_vec = v.as_array();
    if into_vec == None {
        return Err("Err")?;
    }
    let mut object_map = &serde_json::map::Map::new();
    let mut delist_hashset: HashSet<String> = HashSet::new();
    let mut symbol = String::new();
    for element in into_vec.unwrap() {
        object_map = element.as_object().unwrap();
        let mut object_map_iter = object_map.iter();
        
        for element in object_map_iter {
            match element.0.as_str() {
                "delistTime" => {
                },
                "symbols" => {
                    if let Some(array) = element.1.as_array() {
                        for delist_symbol in array {
                            if let Some(symbol) = delist_symbol.as_str() {
                                if symbol.ends_with("USDT") && !delist_hashset.contains(symbol) {
                                    delist_hashset.insert(symbol.to_string()); 
                                }
                            }
                        }
                    }
                },
                _ => {
                    log::error!("Elements in body msg are changed. Please update both your delist table and vectors.");
                }
            }
        }
       
    }

    if delist_hashset.len() != 0 {
        #[derive(Debug, FromRow)]
        struct Symbols {
            symbol: String,
        }
        
        let table_name = String::from("banned_usdt_trades");
        let column_name = String::from("symbol");
        let condition = None;
        let mut symbols = Symbols {
            symbol: String::new(),
        };

        let mut select_result = try_select_record(&table_name, &column_name, &condition, &symbols)
        .await
        .unwrap();
        let mut banned_usdt_trades_set: HashSet<String> = HashSet::new();
        for element in select_result {
            banned_usdt_trades_set.insert(element.symbol.clone());
        }

        let insert_column = vec!["symbol"];
        for element in &delist_hashset {
            if !banned_usdt_trades_set.contains(element) {
                let insert_values = vec![element.clone()];
                insert_one_record(&table_name, &insert_column, &insert_values)
                .await
                .unwrap();
            } 
        }
    }
    
    Ok(())
}