use detee_shared::app_proto::brain_app_cli_client::BrainAppCliClient;
use detee_shared::app_proto::{
    AppContract, AppNodeFilters, AppNodeListResp, DelAppReq, ListAppContractsReq, NewAppReq,
    NewAppRes,
};
use detee_shared::sgx::types::brain::AppDeployConfig;
use tokio_stream::StreamExt;
use tonic::transport::Channel;

use crate::config::Config;
use crate::sgx::utils::calculate_nanolp_for_app;
use crate::utils::{self, sign_request};

#[derive(thiserror::Error, Debug)]
pub enum Error {
    #[error("Failed to connect to the brain: {0}")]
    BrainConnection(#[from] tonic::transport::Error),
    #[error("Received error from brain: {}", _0.message())]
    ResponseStatus(#[from] tonic::Status),
    #[error(transparent)]
    InternalError(#[from] utils::Error),
    #[error(transparent)]
    ConfigError(#[from] crate::config::Error),
    #[error("The Root CA file got corrupted.")]
    CorruptedRootCa(#[from] std::io::Error),
    #[error("Internal app error: could not parse Brain URL")]
    CorruptedBrainUrl,
}

type Result<T> = std::result::Result<T, Error>;

impl crate::HumanOutput for AppNodeListResp {
    fn human_cli_print(&self) {
        println!("The pubkey of this node is {} and the IP is {}", self.node_pubkey, self.ip);
        println!("It belongs to the operator {}", self.operator);
        println!(
            "This node is located in the city {}, within the region of {}, in {}",
            self.city, self.region, self.country
        );
        println!("The price multiplier for the node is {}.", self.price);
    }
}

impl crate::HumanOutput for AppContract {
    fn human_cli_print(&self) {
        let app_resource = self.resource.clone().unwrap_or_default();
        let mapped_ports = self
            .mapped_ports
            .clone()
            .iter()
            .map(|p| format!("({},{})", p.host_port, p.app_port))
            .collect::<Vec<_>>()
            .join(", ");
        println!(
            "The App {} has the UUID {}, and it runs on the node {}",
            self.app_name, self.uuid, self.node_pubkey
        );
        println!("The app has mapped ports by the node are: {mapped_ports}");
        println!(
            "The App has {} vCPUS, {}MB of memory and a disk of {} MB.",
            app_resource.vcpu, app_resource.memory_mb, app_resource.disk_mb
        );
        println!("You have locked {} nanoLP in the contract, that get collected at a rate of {} nanoLP per minute.",
            self.locked_nano, self.nano_per_minute);
    }
}

async fn client() -> Result<BrainAppCliClient<Channel>> {
    Ok(BrainAppCliClient::new(Config::get_brain_channel().await?))
}

pub async fn new_app(app_deploy_config: AppDeployConfig) -> Result<NewAppRes> {
    let resource = app_deploy_config.clone().resource;
    let mut req: NewAppReq = app_deploy_config.clone().into();

    let locked_nano = calculate_nanolp_for_app(
        resource.vcpu,
        resource.memory_mb,
        resource.disk_mb,
        app_deploy_config.hours,
        req.price_per_unit,
    );

    req.uuid = "".to_string();
    req.locked_nano = locked_nano;
    req.admin_pubkey = Config::get_detee_wallet()?;
    req.hratls_pubkey = Config::get_hratls_pubkey_hex()?;

    let res = client().await?.deploy_app(sign_request(req)?).await?;
    Ok(res.into_inner())
}

pub async fn delete_app(app_uuid: String) -> Result<()> {
    let admin_pubkey = Config::get_detee_wallet()?;
    let delete_req = DelAppReq { uuid: app_uuid, admin_pubkey };
    let _ = client().await?.delete_app(sign_request(delete_req)?).await?;
    Ok(())
}

pub async fn list_contracts(req: ListAppContractsReq) -> Result<Vec<AppContract>> {
    let mut daemon_serivce = client().await?;
    let mut res_stream = daemon_serivce.list_app_contracts(sign_request(req)?).await?.into_inner();

    let mut app_contracts = vec![];

    while let Some(stream_update) = res_stream.next().await {
        match stream_update {
            Ok(contract) => {
                app_contracts.push(contract);
            }
            Err(e) => {
                eprintln!("Brain disconnected from register_node: {e}");
            }
        }
    }

    Ok(app_contracts)
}

pub async fn get_one_app_node(req: AppNodeFilters) -> Result<AppNodeListResp> {
    let res = client().await?.get_one_app_node(sign_request(req)?).await?;
    Ok(res.into_inner())
}

pub async fn get_app_node_list(req: AppNodeFilters) -> Result<Vec<AppNodeListResp>> {
    log::debug!("Getting app nodes from brain...");
    let mut nodes = Vec::new();
    let mut grpc_stream = client().await?.list_app_nodes(sign_request(req)?).await?.into_inner();

    while let Some(stream_update) = grpc_stream.next().await {
        match stream_update {
            Ok(node) => {
                log::debug!("Received node from brain: {node:?}");
                nodes.push(node);
            }
            Err(e) => {
                log::warn!("Received error instead of node list: {e:?}");
            }
        }
    }
    log::debug!("Brain terminated list_nodes stream.");
    Ok(nodes)
}