use crate::constants::HRATLS_APP_PORT;
use crate::sgx::get_one_contract;
use crate::sgx::grpc_brain::new_app;
use crate::sgx::grpc_dtpm::attest_and_send_config;
use crate::sgx::package_entry_from_name;
use detee_shared::app_proto::NewAppRes;
use detee_shared::sgx::types::brain::AppDeployConfig;
use detee_shared::sgx::types::dtpm::DtpmConfig;
use detee_shared::sgx::types::dtpm::EnvironmentEntry;
use tokio_retry::strategy::FixedInterval;
use tokio_retry::Retry;

#[derive(thiserror::Error, Debug)]
pub enum Error {
    #[error(transparent)]
    Reqwest(#[from] reqwest::Error),
    #[error(transparent)]
    Serde(#[from] serde_yaml::Error),
    #[error("{0}")]
    PublicPackage(std::string::String),
    #[error("{0}")]
    Brain(#[from] crate::sgx::grpc_brain::Error),
    #[error("{0}")]
    Dtpm(#[from] crate::sgx::grpc_dtpm::Error),
    #[error("{0}")]
    Deployment(String),
}

pub async fn hratls_url_and_mr_enclave_from_app_id(app_id: &str) -> (String, Option<[u8; 32]>) {
    let app_contract = get_one_contract(app_id).await;
    if app_contract.is_err() {
        eprintln!("Could not find App contract with ID: {}", app_id);
        std::process::exit(1);
    }
    let app_contract = app_contract.unwrap();
    let mr_enclave = app_contract
        .public_package_mr_enclave
        .clone()
        .filter(|vec| vec.len() == 32)
        .and_then(|vec| vec.try_into().ok());

    let public_ip = app_contract.public_ipv4.clone();
    let dtpm_port = app_contract
        .mapped_ports
        .iter()
        .find(|port| port.app_port == HRATLS_APP_PORT)
        .unwrap()
        .host_port;

    (format!("https://{public_ip}:{dtpm_port}"), mr_enclave)
}

pub async fn fetch_config(package_name: &str) -> Result<DtpmConfig, Error> {
    let index_package_entry = package_entry_from_name(package_name)
        .ok_or(Error::PublicPackage("package not found for ".to_string() + package_name))?;

    let launch_config_url = index_package_entry.launch_config_url.clone();

    let launch_config_str = reqwest::get(launch_config_url).await?.text().await?;

    let launch_config = serde_yaml::from_str::<DtpmConfig>(&launch_config_str)?;

    Ok(launch_config)
}

pub fn calculate_nanolp_for_app(
    vcpus: u32,
    memory_mb: u32,
    disk_size_mb: u32,
    hours: u64,
    node_price: u64,
) -> u64 {
    // this calculation needs to match the calculation of the network
    let total_units =
        (vcpus as f64 * 5f64) + (memory_mb as f64 / 200f64) + (disk_size_mb as f64 / 10000f64);
    let locked_nano = (hours as f64 * 60f64 * total_units * node_price as f64) as u64;
    // TODO: change all println to eprintln
    println!(
            "Node price: {}/unit/minute. Total Units for hardware requested: {:.4}. Locking {} LP (offering the App for {} hours).",
            node_price as f64 / 1_000_000_000.0,
            total_units,
            locked_nano as f64 / 1_000_000_000.0,
            hours
        );
    locked_nano
}

pub fn override_envs_and_args_launch_config(
    mut launch_config: DtpmConfig,
    envs: Vec<String>,
    args: Vec<String>,
) -> DtpmConfig {
    if envs.is_empty() && args.is_empty() {
        return launch_config;
    }
    for env in envs {
        let mut env = env.split("=");
        let key = env.next().expect("environment variable must be in the format 'key=value'");
        let value =
            env.next().expect("environment variable pair must be in the format 'key=value'");

        if launch_config.environments.iter().any(|env| env.name == key) {
            let existing_env =
                launch_config.environments.iter_mut().find(|env| env.name == key).unwrap();

            existing_env.name = key.to_string();
            existing_env.value = value.to_string();
        } else {
            launch_config
                .environments
                .push(EnvironmentEntry { name: key.to_string(), value: value.to_string() });
        }
    }

    for arg in args {
        launch_config.child_processes.first_mut().unwrap().arguments.push(arg);
    }

    launch_config
}

pub async fn deploy_new_app_and_update_config(
    app_deploy_config: AppDeployConfig,
    launch_config: Option<DtpmConfig>,
) -> Result<NewAppRes, Error> {
    let new_app_res = new_app(app_deploy_config).await?;

    if new_app_res.error.is_empty() {
        if let Some(launch_config) = launch_config {
            println!("Deploying...");
            tokio::time::sleep(tokio::time::Duration::from_millis(3100)).await;
            Retry::spawn(FixedInterval::from_millis(500).take(5), || {
                log::debug!("retrying attestation and launch config update");
                attest_and_send_config(launch_config.clone(), &new_app_res.uuid)
            })
            .await?;
            Ok(new_app_res)
        } else {
            Ok(new_app_res)
        }
    } else {
        Err(Error::Deployment(new_app_res.error))
    }
}