//! Single RPC transaction parse example:
//! - Default: SDK-backed parsing through `parse_encoded_rpc_transaction_as_streamer_events`.
//! - Debug compare: set `STREAMER_LOCAL_IX=1` to run the local instruction path.
//!
//! You can also call `fetch_rpc_transaction_as_streamer_events_async` from the crate root
//! when you want the helper to fetch and parse by signature.
//!
//! Environment: `SOLANA_RPC_URL` (optional, defaults to the public mainnet RPC).

use anyhow::Result;
use solana_commitment_config::CommitmentConfig;
use solana_streamer_sdk::parse_encoded_rpc_transaction_as_streamer_events;
use solana_streamer_sdk::streaming::event_parser::core::event_parser::EventParser;
use solana_streamer_sdk::streaming::event_parser::DexEvent;
use solana_streamer_sdk::streaming::event_parser::Protocol;
use std::str::FromStr;
use std::sync::Arc;

fn rpc_url_from_env() -> String {
    std::env::var("SOLANA_RPC_URL")
        .unwrap_or_else(|_| "https://api.mainnet-beta.solana.com".to_string())
}

fn use_local_ix_path() -> bool {
    matches!(
        std::env::var("STREAMER_LOCAL_IX").as_deref(),
        Ok("1") | Ok("true") | Ok("yes") | Ok("TRUE") | Ok("YES")
    )
}

#[tokio::main]
async fn main() -> Result<()> {
    let signatures = vec![
        "4PsHYajH87x2zJPEGZczZtd2ksibuMCFPonC24jk5mTGZ46hzvjpzM5UZuLz9sRv79MkCBbtDqwJapGPTSkCFKoL",
    ];
    // Validate signature format
    let mut valid_signatures = Vec::new();
    for sig_str in &signatures {
        match solana_sdk::signature::Signature::from_str(sig_str) {
            Ok(_) => valid_signatures.push(*sig_str),
            Err(e) => println!("Invalid signature format: {}", e),
        }
    }
    if valid_signatures.is_empty() {
        println!("No valid transaction signatures");
        return Ok(());
    }
    for signature in valid_signatures {
        println!("Starting transaction parsing: {}", signature);
        get_single_transaction_details(signature).await?;
        println!("Transaction parsing completed: {}\n", signature);
        println!("Visit link to compare data: \nhttps://solscan.io/tx/{}\n", signature);
        println!("--------------------------------");
    }

    Ok(())
}

/// Local versioned-message + inner-instruction path, kept for parser debugging.
async fn parse_local_ix_path(
    transaction: &solana_transaction_status::EncodedConfirmedTransactionWithStatusMeta,
    signature: solana_sdk::signature::Signature,
    recv_us: i64,
    protocols: &[Protocol],
) -> Result<()> {
    use prost_types::Timestamp;
    use solana_sdk::{message::compiled_instruction::CompiledInstruction, pubkey::Pubkey};
    use solana_transaction_status::{InnerInstruction, InnerInstructions, UiInstruction};

    println!("\n--- Parsed events (STREAMER_LOCAL_IX=1, local instruction path) ---\n");

    let versioned_tx = match transaction.transaction.transaction.decode() {
        Some(tx) => tx,
        None => {
            println!("Failed to decode transaction");
            return Ok(());
        }
    };

    let mut inner_instructions_vec: Vec<InnerInstructions> = Vec::new();
    if let Some(meta) = &transaction.transaction.meta {
        if let solana_transaction_status::option_serializer::OptionSerializer::Some(
            ui_inner_insts,
        ) = &meta.inner_instructions
        {
            for ui_inner in ui_inner_insts {
                let mut converted_instructions = Vec::new();

                for ui_instruction in &ui_inner.instructions {
                    if let UiInstruction::Compiled(ui_compiled) = ui_instruction {
                        if let Ok(data) = solana_sdk::bs58::decode(&ui_compiled.data).into_vec() {
                            let compiled_instruction = CompiledInstruction {
                                program_id_index: ui_compiled.program_id_index,
                                accounts: ui_compiled.accounts.to_vec(),
                                data,
                            };

                            let inner_instruction = InnerInstruction {
                                instruction: compiled_instruction,
                                stack_height: ui_compiled.stack_height,
                            };

                            converted_instructions.push(inner_instruction);
                        }
                    }
                }

                let inner_instructions = InnerInstructions {
                    index: ui_inner.index,
                    instructions: converted_instructions,
                };

                inner_instructions_vec.push(inner_instructions);
            }
        }
    }

    let meta = transaction.transaction.meta.clone();
    let mut address_table_lookups: Vec<Pubkey> = vec![];
    if let Some(meta) = meta {
        if let solana_transaction_status::option_serializer::OptionSerializer::Some(
            loaded_addresses,
        ) = &meta.loaded_addresses
        {
            address_table_lookups
                .reserve(loaded_addresses.writable.len() + loaded_addresses.readonly.len());
            address_table_lookups.extend(
                loaded_addresses.writable.iter().filter_map(|s| s.parse::<Pubkey>().ok()).chain(
                    loaded_addresses.readonly.iter().filter_map(|s| s.parse::<Pubkey>().ok()),
                ),
            );
        }
    }

    let mut accounts = Vec::with_capacity(
        versioned_tx.message.static_account_keys().len() + address_table_lookups.len(),
    );
    accounts.extend_from_slice(versioned_tx.message.static_account_keys());
    accounts.extend(address_table_lookups);

    let slot = transaction.slot;
    let block_time = transaction.block_time.map(|t| Timestamp { seconds: t, nanos: 0 });
    let bot_wallet = None;
    let tx_index = None;

    let callback = Arc::new(move |event: DexEvent| {
        println!("{:?}\n", event);
    });

    EventParser::parse_instruction_events_from_versioned_transaction(
        protocols,
        None,
        &versioned_tx,
        signature,
        Some(slot),
        block_time,
        recv_us,
        &accounts,
        &inner_instructions_vec,
        bot_wallet,
        tx_index,
        callback,
    )
    .await?;

    Ok(())
}

/// Get details of a single transaction
async fn get_single_transaction_details(signature_str: &str) -> Result<()> {
    use solana_sdk::signature::Signature;
    use solana_transaction_status::UiTransactionEncoding;

    let signature = Signature::from_str(signature_str)?;

    let rpc_url = rpc_url_from_env();
    println!("Connecting to Solana RPC: {}", rpc_url);

    let client = solana_client::nonblocking::rpc_client::RpcClient::new(rpc_url);

    match client
        .get_transaction_with_config(
            &signature,
            solana_client::rpc_config::RpcTransactionConfig {
                encoding: Some(UiTransactionEncoding::Base64),
                commitment: Some(CommitmentConfig::confirmed()),
                max_supported_transaction_version: Some(0),
            },
        )
        .await
    {
        Ok(transaction) => {
            println!("Transaction signature: {}", signature_str);
            println!("Block slot: {}", transaction.slot);

            if let Some(block_time) = transaction.block_time {
                println!("Block time: {}", block_time);
            }

            if let Some(meta) = &transaction.transaction.meta {
                println!("Transaction fee: {} lamports", meta.fee);
                println!("Status: {}", if meta.err.is_none() { "Success" } else { "Failed" });
                if let Some(err) = &meta.err {
                    println!("Error details: {:?}", err);
                }
                // Compute units consumed
                if let solana_transaction_status::option_serializer::OptionSerializer::Some(units) =
                    &meta.compute_units_consumed
                {
                    println!("Compute units consumed: {}", units);
                }
                // Display logs (all)
                if let solana_transaction_status::option_serializer::OptionSerializer::Some(logs) =
                    &meta.log_messages
                {
                    println!("Transaction logs (all {} entries):", logs.len());
                    for (i, log) in logs.iter().enumerate() {
                        println!("  [{}] {}", i + 1, log);
                    }
                }
            }

            let recv_us = std::time::SystemTime::now()
                .duration_since(std::time::UNIX_EPOCH)
                .unwrap()
                .as_micros() as i64;

            let protocols = vec![
                Protocol::Bonk,
                Protocol::RaydiumClmm,
                Protocol::PumpSwap,
                Protocol::PumpFun,
                Protocol::RaydiumCpmm,
                Protocol::RaydiumAmmV4,
                Protocol::MeteoraDammV2,
                Protocol::OrcaWhirlpool,
                Protocol::MeteoraPools,
                Protocol::MeteoraDlmm,
            ];

            if use_local_ix_path() {
                parse_local_ix_path(&transaction, signature, recv_us, &protocols).await?;
            } else {
                println!("\n--- Parsed events (default SDK-backed RPC path) ---\n");
                match parse_encoded_rpc_transaction_as_streamer_events(
                    &transaction,
                    recv_us,
                    &protocols,
                    None,
                ) {
                    Ok(events) => {
                        println!("Total {} streamer DexEvent(s):\n", events.len());
                        for ev in events {
                            println!("{:?}\n", ev);
                        }
                    }
                    Err(e) => println!("SDK-backed parse error: {}", e),
                }
            }
        }
        Err(e) => {
            println!("Failed to get transaction: {}", e);
        }
    }

    Ok(())
}