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use std::time::Duration;

use crate::logic::ServerLogic;
use async_channel::Sender;
use async_handle::Handle;
use basws_shared::{
    protocol::ServerResponse,
    protocol::{InstallationConfig, WsBatchResponse},
    timing::current_timestamp,
    timing::NetworkTiming,
};

pub struct ConnectedClient<L>
where
    L: ServerLogic + ?Sized,
{
    data: Handle<ConnectedClientData<L>>,
}

impl<L> Clone for ConnectedClient<L>
where
    L: ServerLogic,
{
    fn clone(&self) -> Self {
        Self {
            data: self.data.clone(),
        }
    }
}

struct ConnectedClientData<L>
where
    L: ServerLogic + ?Sized,
{
    client: Handle<L::Client>,
    pub installation: Option<InstallationConfig>,
    pub(crate) nonce: Option<[u8; 32]>,
    sender: Sender<WsBatchResponse<L::Response>>,
    pub account: Option<Handle<L::Account>>,
    pub network_timing: NetworkTiming,
}

impl<L> ConnectedClient<L>
where
    L: ServerLogic + 'static,
{
    pub(crate) fn new(client: L::Client, sender: Sender<WsBatchResponse<L::Response>>) -> Self {
        Self::new_with_installation(None, client, sender)
    }

    pub(crate) fn new_with_installation(
        installation: Option<InstallationConfig>,
        client: L::Client,
        sender: Sender<WsBatchResponse<L::Response>>,
    ) -> Self {
        Self {
            data: Handle::new(ConnectedClientData {
                sender,
                client: Handle::new(client),
                nonce: None,
                account: None,
                installation,
                network_timing: Default::default(),
            }),
        }
    }

    pub(crate) async fn send(&self, response: WsBatchResponse<L::Response>) -> anyhow::Result<()> {
        let data = self.data.read().await;
        Ok(data.sender.send(response).await?)
    }

    pub async fn send_response(&self, response: L::Response) -> anyhow::Result<()> {
        let data = self.data.read().await;
        Ok(data
            .sender
            .send(WsBatchResponse::from_response(response))
            .await?)
    }

    pub async fn installation(&self) -> Option<InstallationConfig> {
        let data = self.data.read().await;
        data.installation
    }

    pub async fn set_installation(&self, installation: InstallationConfig) {
        let mut data = self.data.write().await;
        data.installation = Some(installation);
    }

    pub async fn client(&self) -> Handle<L::Client> {
        let data = self.data.read().await;
        data.client.clone()
    }

    pub async fn map_client<F: FnOnce(&L::Client) -> R, R>(&self, map_fn: F) -> R {
        let data = self.data.read().await;
        let client = data.client.read().await;
        map_fn(&client)
    }

    pub async fn map_client_mut<F: FnOnce(&mut L::Client) -> R, R>(&self, map_fn: F) -> R {
        let data = self.data.read().await;
        let mut client = data.client.write().await;
        map_fn(&mut client)
    }

    pub async fn account(&self) -> Option<Handle<L::Account>> {
        let data = self.data.read().await;
        data.account.clone()
    }

    pub async fn set_account(&self, account: Handle<L::Account>) {
        let mut data = self.data.write().await;
        data.account = Some(account);
    }

    pub async fn nonce(&self) -> Option<[u8; 32]> {
        let data = self.data.read().await;
        data.nonce
    }

    pub(crate) async fn set_nonce(&self, nonce: [u8; 32]) {
        let mut data = self.data.write().await;
        data.nonce = Some(nonce);
    }

    pub(crate) async fn update_network_timing(&self, original_timestamp: f64, timestamp: f64) {
        let mut data = self.data.write().await;
        data.network_timing.update(original_timestamp, timestamp)
    }

    pub(crate) async fn ping_loop(&self, ping_duration: Duration) -> anyhow::Result<()> {
        loop {
            let ping = {
                let data = self.data.read().await;
                ServerResponse::Ping {
                    average_roundtrip: data.network_timing.average_roundtrip,
                    average_server_timestamp_delta: data
                        .network_timing
                        .average_server_timestamp_delta,
                    timestamp: current_timestamp(),
                }
            };

            self.send(WsBatchResponse {
                request_id: None,
                results: vec![ping],
            })
            .await?;

            tokio::time::sleep(ping_duration).await
        }
    }
}