use algonaut::algod::v2::Algod;
use algonaut::core::{MicroAlgos, ToMsgPack};
use algonaut::transaction::account::Account;
use algonaut::transaction::{Pay, TxnBuilder};
use dotenv::dotenv;
use std::env;
use std::error::Error;
use std::fs::File;
use std::io::Write;

#[tokio::main]
async fn main() -> Result<(), Box<dyn Error>> {
    // load variables in .env
    dotenv().ok();

    let algod = Algod::new(&env::var("ALGOD_URL")?, &env::var("ALGOD_TOKEN")?)?;

    let account = Account::from_mnemonic("auction inquiry lava second expand liberty glass involve ginger illness length room item discover ahead table doctor term tackle cement bonus profit right above catch")?;

    let params = algod.suggested_transaction_params().await?;

    let t = TxnBuilder::with(
        &params,
        Pay::new(
            account.address(),
            "4MYUHDWHWXAKA5KA7U5PEN646VYUANBFXVJNONBK3TIMHEMWMD4UBOJBI4".parse()?,
            MicroAlgos(123_456),
        )
        .build(),
    )
    .build()?;

    // sign the transaction
    let signed_transaction = account.sign_transaction(t)?;
    let bytes = signed_transaction.to_msg_pack()?;

    let filename = "./signed.tx";
    let mut f = File::create(filename)?;
    f.write_all(&bytes)?;

    println!("Saved signed transaction to file: {}", filename);

    Ok(())
}