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use std::str::FromStr;
use bigdecimal::BigDecimal;

pub struct OrderRequest<'a> {
    pub symbol: &'a str,
    pub instruction: &'a str,
    pub buy_or_sell: &'static str,
    pub price: BigDecimal,
    pub amount: BigDecimal,
}

pub struct OrderQuery {
    pub symbol: String,
    pub states: String,
    pub before: Option<u16>,
    pub after: Option<u16>,
    pub limit: Option<u16>,
}

#[derive(Deserialize, Debug, Eq, PartialEq)]
pub struct OrderInfo {
    pub id: String,
    pub symbol: String,
    #[serde(rename = "type")]
    pub instruction: String,
    pub side: String,
    pub price: String,
    pub amount: String,
    pub state: String,
    pub executed_value: String,
    pub fill_fees: String,
    pub filled_amount: String,
    pub created_at: u64,
    pub source: String,
}

#[derive(Deserialize, Debug, Eq, PartialEq)]
pub struct MatchResult {
    pub price: String,
    pub fill_fees: String,
    pub filled_amount: String,
    pub side: Option<String>,
    #[serde(rename = "type")]
    pub instruction: String,
    pub created_at: u64,
}

#[derive(Deserialize, Debug, PartialEq)]
pub struct Orderbook {
    pub bids: Vec<f64>,
    pub asks: Vec<f64>,
    pub ts: i64,
    pub seq: i64,
    #[serde(rename = "type")]
    pub order_type: String,
}

impl<'a> OrderRequest<'a> {
    pub fn sell_limit(symbol: &'a str, amount: BigDecimal, price: BigDecimal) -> OrderRequest<'a> {
        OrderRequest {
            symbol: symbol,
            instruction: "limit",
            price: price,
            amount: amount,
            buy_or_sell: "sell",
        }
    }

    pub fn sell_market(symbol: &'a str, amount: BigDecimal) -> OrderRequest<'a> {
        OrderRequest {
            symbol: symbol,
            instruction: "market",
            price: BigDecimal::from_str("0.0").unwrap(),
            amount: amount,
            buy_or_sell: "sell",
        }
    }

    pub fn buy_limit(symbol: &'a str, amount: BigDecimal, price: BigDecimal) -> OrderRequest<'a> {
        OrderRequest {
            symbol: symbol,
            instruction: "limit",
            price: price,
            amount: amount,
            buy_or_sell: "buy",
        }
    }

    pub fn buy_market(symbol: &'a str, amount: BigDecimal) -> OrderRequest<'a> {
        OrderRequest {
            symbol: symbol,
            instruction: "market",
            price: BigDecimal::from_str("0.0").unwrap(),
            amount: amount,
            buy_or_sell: "buy",
        }
    }
}

#[cfg(test)]
mod tests {

    #[test]
    fn test_order() {
        // let buy_limit = super::OrderRequest::buy_limit(
        //     "usdtbtc",
        //     BigDecimal::from_str("100.0").unwrap(),
        //     BigDecimal::from_str("1.00000").unwrap(),
        // );
        // let sell_limit = super::OrderRequest::sell_limit(
        //     "usdtbtc",
        //     BigDecimal::from_str("101.00").unwrap(),
        //     BigDecimal::from_str("0.99999").unwrap(),
        // );
        // let buy_market =
        //     super::OrderRequest::buy_market("usdtbtc", BigDecimal::from_str("1.2000").unwrap());
        // let sell_market =
        //     super::OrderRequest::sell_market("usdtbtc", BigDecimal::from_str("1.09999").unwrap());
    }
}