use crate::swqos::common::{
    default_http_client_builder, poll_transaction_confirmation, serialize_transaction_and_encode,
    FormatBase64VersionedTransaction,
};
use rand::seq::IndexedRandom;
use reqwest::Client;
use serde_json::json;
use std::{sync::Arc, time::Instant};

use solana_transaction_status::UiTransactionEncoding;

use crate::swqos::SwqosClientTrait;
use crate::swqos::{SwqosType, TradeType};
use anyhow::Result;
use solana_sdk::transaction::VersionedTransaction;

use crate::{common::SolanaRpcClient, constants::swqos::JITO_TIP_ACCOUNTS};

pub struct JitoClient {
    pub endpoint: String,
    pub auth_token: String,
    pub rpc_client: Arc<SolanaRpcClient>,
    pub http_client: Client,
}

#[async_trait::async_trait]
impl SwqosClientTrait for JitoClient {
    async fn send_transaction(
        &self,
        trade_type: TradeType,
        transaction: &VersionedTransaction,
        wait_confirmation: bool,
    ) -> Result<()> {
        self.send_transaction_impl(trade_type, transaction, wait_confirmation).await
    }

    async fn send_transactions(
        &self,
        trade_type: TradeType,
        transactions: &Vec<VersionedTransaction>,
        wait_confirmation: bool,
    ) -> Result<()> {
        self.send_transactions_impl(trade_type, transactions, wait_confirmation).await
    }

    fn get_tip_account(&self) -> Result<String> {
        if let Some(acc) = JITO_TIP_ACCOUNTS.choose(&mut rand::rng()) {
            Ok(acc.to_string())
        } else {
            Err(anyhow::anyhow!("no valid tip accounts found"))
        }
    }

    fn get_swqos_type(&self) -> SwqosType {
        SwqosType::Jito
    }
}

impl JitoClient {
    pub fn new(rpc_url: String, endpoint: String, auth_token: String) -> Self {
        let rpc_client = SolanaRpcClient::new(rpc_url);
        let http_client = default_http_client_builder().build().unwrap();
        Self { rpc_client: Arc::new(rpc_client), endpoint, auth_token, http_client }
    }

    pub async fn send_transaction_impl(
        &self,
        trade_type: TradeType,
        transaction: &VersionedTransaction,
        wait_confirmation: bool,
    ) -> Result<()> {
        let start_time = Instant::now();
        let (content, signature) =
            serialize_transaction_and_encode(transaction, UiTransactionEncoding::Base64)?;

        let request_body = serde_json::to_string(&json!({
            "id": 1,
            "jsonrpc": "2.0",
            "method": "sendTransaction",
            "params": [
                content,
                {
                    "encoding": "base64"
                }
            ]
        }))?;

        let endpoint = if self.auth_token.is_empty() {
            format!("{}/api/v1/transactions", self.endpoint)
        } else {
            format!("{}/api/v1/transactions?uuid={}", self.endpoint, self.auth_token)
        };
        let response = if self.auth_token.is_empty() {
            self.http_client.post(&endpoint)
        } else {
            self.http_client.post(&endpoint).header("x-jito-auth", &self.auth_token)
        };
        let response_text = response
            .body(request_body)
            .header("Content-Type", "application/json")
            .send()
            .await?
            .text()
            .await?;

        if let Ok(response_json) = serde_json::from_str::<serde_json::Value>(&response_text) {
            if response_json.get("result").is_some() {
                crate::common::sdk_log::log_swqos_submitted("jito", trade_type, start_time.elapsed());
            } else if let Some(_error) = response_json.get("error") {
                eprintln!(" [jito] {} submission failed after {:?}: {:?}", trade_type, start_time.elapsed(), _error);
            }
        } else {
            crate::common::sdk_log::log_swqos_submission_failed("jito", trade_type, start_time.elapsed(), response_text);
        }

        let start_time: Instant = Instant::now();
        match poll_transaction_confirmation(&self.rpc_client, signature, wait_confirmation).await {
            Ok(_) => (),
            Err(e) => {
                println!(" signature: {:?}", signature);
                println!(" [{:width$}] {} confirmation failed: {:?}", "jito", trade_type, start_time.elapsed(), width = crate::common::sdk_log::SWQOS_LABEL_WIDTH);
                return Err(e);
            }
        }
        if wait_confirmation {
            println!(" signature: {:?}", signature);
            println!(" [{:width$}] {} confirmed: {:?}", "jito", trade_type, start_time.elapsed(), width = crate::common::sdk_log::SWQOS_LABEL_WIDTH);
        }

        Ok(())
    }

    pub async fn send_transactions_impl(
        &self,
        trade_type: TradeType,
        transactions: &Vec<VersionedTransaction>,
        _wait_confirmation: bool,
    ) -> Result<()> {
        let start_time = Instant::now();
        let txs_base64 =
            transactions.iter().map(|tx| tx.to_base64_string()).collect::<Vec<String>>();
        let body = serde_json::json!({
            "jsonrpc": "2.0",
            "method": "sendBundle",
            "params": [
                txs_base64,
                { "encoding": "base64" }
            ],
            "id": 1,
        });

        let endpoint = if self.auth_token.is_empty() {
            format!("{}/api/v1/bundles", self.endpoint)
        } else {
            format!("{}/api/v1/bundles?uuid={}", self.endpoint, self.auth_token)
        };
        let response = if self.auth_token.is_empty() {
            self.http_client.post(&endpoint)
        } else {
            self.http_client.post(&endpoint).header("x-jito-auth", &self.auth_token)
        };
        let response_text = response
            .body(body.to_string())
            .header("Content-Type", "application/json")
            .send()
            .await?
            .text()
            .await?;

        if let Ok(response_json) = serde_json::from_str::<serde_json::Value>(&response_text) {
            if response_json.get("result").is_some() {
                println!(" jito {} submitted: {:?}", trade_type, start_time.elapsed());
            } else if let Some(_error) = response_json.get("error") {
                eprintln!(" jito {} submission failed after {:?}: {:?}", trade_type, start_time.elapsed(), _error);
            }
        }

        Ok(())
    }
}