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use crate::{exchange::bybit::channel::BybitChannel, Identifier};
use barter_integration::model::SubscriptionId;
use chrono::{DateTime, Utc};
use serde::{
    de::{Error, Unexpected},
    Deserialize, Serialize,
};

/// ### Raw Payload Examples
/// See docs: <https://bybit-exchange.github.io/docs/v5/websocket/public/trade>
/// #### Spot Side::Buy Trade
///```json
/// {
///     "topic": "publicTrade.BTCUSDT",
///     "type": "snapshot",
///     "ts": 1672304486868,
///     "data": [
///         {
///             "T": 1672304486865,
///             "s": "BTCUSDT",
///             "S": "Buy",
///             "v": "0.001",
///             "p": "16578.50",
///             "L": "PlusTick",
///             "i": "20f43950-d8dd-5b31-9112-a178eb6023af",
///             "BT": false
///         }
///     ]
/// }
/// ```
#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Deserialize, Serialize)]
pub struct BybitMessage<T> {
    #[serde(alias = "topic", deserialize_with = "de_message_subscription_id")]
    pub subscription_id: SubscriptionId,

    #[serde(rename = "type")]
    pub r#type: String,

    #[serde(
        alias = "ts",
        deserialize_with = "barter_integration::de::de_u64_epoch_ms_as_datetime_utc"
    )]
    pub time: DateTime<Utc>,
    pub data: T,
}

/// Deserialize a [`BybitMessage`] "s" (eg/ "publicTrade.BTCUSDT") as the associated
/// [`SubscriptionId`].
///
/// eg/ "publicTrade|BTCUSDT"
pub fn de_message_subscription_id<'de, D>(deserializer: D) -> Result<SubscriptionId, D::Error>
where
    D: serde::de::Deserializer<'de>,
{
    let input = <&str as serde::Deserialize>::deserialize(deserializer)?;
    let mut tokens = input.split('.');

    match (tokens.next(), tokens.next(), tokens.next()) {
        (Some("publicTrade"), Some(market), None) => Ok(SubscriptionId::from(format!(
            "{}|{market}",
            BybitChannel::TRADES.0
        ))),
        _ => Err(Error::invalid_value(
            Unexpected::Str(input),
            &"invalid message type expected pattern: <type>.<symbol>",
        )),
    }
}

impl<T> Identifier<Option<SubscriptionId>> for BybitMessage<T> {
    fn id(&self) -> Option<SubscriptionId> {
        Some(self.subscription_id.clone())
    }
}