use crate::NetworkEvent;
use crate::P2PSharedData;
use crate::cryptographic_signature::CryptographicSignature;
use crate::get_server_address;
use crate::message_handling::EventType;
use crate::messages_structure::construct_message;
use crate::server_communication::generate_id;
use crossbeam_channel::Sender;
use std::net::SocketAddr;
use std::str::FromStr;
use std::sync::Arc;

///
/// sends the cryptographic signature to the server using a PUT request over the HTTP API.
///
pub async fn register_with_the_server(
    crypto_pair: &Arc<CryptographicSignature>,
    server_uri: &String,
) -> Result<(), reqwest::Error> {
    let client = reqwest::Client::new();
    let uri = format!("{0}/peers/{1}/key", server_uri, crypto_pair.username);
    let encoded_point = crypto_pair.pub_key.to_encoded_point(false);
    let pubkey_bytes = encoded_point.as_ref().to_vec();
    let pubkey_bytes_minus = pubkey_bytes[1..].to_vec();
    let res = client.put(uri).body(pubkey_bytes_minus).send().await?;
    let res = res.error_for_status()?;
    match res.error_for_status() {
        Ok(_) => {
            println!("register ip adresses");
            Ok(())
        }
        Err(e) => Err(e),
    }
}

pub fn parse_addresses(input: &String) -> Vec<SocketAddr> {
    let mut addrs = Vec::new();
    for line in input.lines() {
        let s = line.trim();
        if s.is_empty() {
            continue;
        }
        if let Ok(sock) = SocketAddr::from_str(s) {
            addrs.push(sock);
        }
    }
    addrs
}

///
/// registers the IP addresses by sending a Hello request to the server.
///
pub async fn perform_handshake(
    sd: &P2PSharedData,
    username: String,
    ip: String,
    event_tx: Sender<NetworkEvent>,
    is_server_handshake: bool,
) {
    println!("username: {}, ip: {}", username.clone(), ip.clone());
    let crypto_pair = sd.cryptopair_ref();
    let senders = sd.senders_ref();

    let id = generate_id();
    let server_addr_query = get_server_address(username.clone(), ip.clone());
    match server_addr_query.await {
        Some(sockaddr_bytes) => {
            sd.set_servername(username);
            sd.set_serveraddress(sockaddr_bytes.to_string());
            // first: &SocketAddr
            let mut payload = Vec::new();
            payload.extend_from_slice(&0u32.to_be_bytes());
            payload.extend_from_slice(&crypto_pair.username.clone().as_bytes());
            let hello_handshake = construct_message(1, payload, id, crypto_pair);
            if is_server_handshake {
                sd.add_message(id, EventType::Hello);
            } else {
                sd.add_message(id, EventType::HelloThenRootRequest);
            }

            match hello_handshake {
                Some(handshake_message) => {
                    senders.send_dispatch(
                        handshake_message,
                        sockaddr_bytes.to_string(),
                        is_server_handshake,
                        sd.messages_list(),
                    );
                }
                None => {}
            }
        }
        None => {
            let err_msg = format!("failed to retreive socket address:").to_string();
            let res = event_tx.send(NetworkEvent::Error(err_msg));
        }
    }

    /*let mut list = messages_list.lock().expect("Failed to lock messages_list");
    match list.get(&id) {
        Some(_) => {
            list.remove(&id);
        }
        None => {
            list.insert(id, EventType::ServerHelloReply);
        }
    }
    println!("message sent: {}", &id);*/
    // 3. Perform the insertion
    /*let mut buf = [0u8; 1024];
    socket.recv_from(&mut buf).expect("receive failed");
    let hello_handshake_received = UDPMessage::parse(buf.to_vec());
    hello_handshake_received.display();*/
    //TODO
}

#[cfg(test)]
mod tests {

    /*///
    /// does the procedure to register with the server
    ///
    #[tokio::test]
    async fn registering_with_server() {
        let username = String::from("gameixtreize");
        let server_uri = String::from("https://jch.irif.fr:8443");
        let crypto_pair = CryptographicSignature::new(username);
        if let Err(e) = register_with_the_server(crypto_pair, server_uri).await {
            eprintln!("Error during registration: {}", e);
        }
    }*/

    /*///
    /// retreives the socket address of a given peer
    ///
    #[tokio::test]
    async fn retreive_socket_addr() {
        let username = String::from("ipjkndqfshjldfsjlbsdfjhhj");
        match get_socket_address(username).await {
            Ok(body) => {
                println!("{:?}", body);
            }
            Err(e) => {
                eprintln!("Erreur HTTP: {}", e);
            }
        }
    }*/
}