use crate::app::Command;
use anyhow::Result;
use dioxus::hooks::{UnboundedReceiver, UnboundedSender};
use futures::io::{AsyncRead, AsyncWrite};
use mumble_protocol::control::{ClientControlCodec, ControlPacket};
use mumble_protocol::Serverbound;
use std::net::ToSocketAddrs;
use std::{fmt, io, sync::Arc};
use tokio::net::TcpStream;
use tokio::task::LocalSet;
use tokio_rustls::rustls;
use tokio_rustls::rustls::client::danger::{HandshakeSignatureValid, ServerCertVerifier};
use tokio_rustls::rustls::pki_types::{CertificateDer, ServerName, UnixTime};
use tokio_rustls::rustls::ClientConfig;
use tokio_rustls::rustls::DigitallySignedStruct;
use tokio_rustls::TlsConnector;
use tokio_util::compat::{TokioAsyncReadCompatExt as _, TokioAsyncWriteCompatExt as _};

pub use tokio::task::spawn;
pub use tokio::time::sleep;

pub struct Error(anyhow::Error);

pub trait ImpRead: AsyncRead + Unpin + Send + 'static {}
impl<T: AsyncRead + Unpin + Send + 'static> ImpRead for T {}

pub trait ImpWrite: AsyncWrite + Unpin + Send + 'static {}
impl<T: AsyncWrite + Unpin + Send + 'static> ImpWrite for T {}

impl From<anyhow::Error> for Error {
    fn from(value: anyhow::Error) -> Self {
        Error(value)
    }
}

impl From<io::Error> for Error {
    fn from(value: io::Error) -> Self {
        Error(value.into())
    }
}

impl Error {
    pub fn new(text: String) -> Self {
        Self(anyhow::Error::msg(text))
    }

    pub fn log(&self) {
        eprintln!("{}", self.0);
    }
}

impl std::error::Error for Error {}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        fmt::Display::fmt(&self.0, f)
    }
}

impl fmt::Debug for Error {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        fmt::Debug::fmt(&self.0, f)
    }
}

pub struct AudioSystem();

impl AudioSystem {
    pub fn new(sender: UnboundedSender<ControlPacket<Serverbound>>) -> Result<Self, Error> {
        // dbg!("todo");
        Ok(AudioSystem())
    }

    pub fn create_player(&mut self) -> Result<AudioPlayer, Error> {
        // dbg!("todo");
        Ok(AudioPlayer())
    }
}

pub struct AudioPlayer();

impl AudioPlayer {
    pub fn play_opus(&mut self, payload: &[u8]) {
        // dbg!("todo");
    }
}

#[derive(Debug)]
struct NoCertificateVerification;

impl ServerCertVerifier for NoCertificateVerification {
    fn verify_server_cert(
        &self,
        _end_entity: &CertificateDer<'_>,
        _intermediates: &[CertificateDer<'_>],
        _server_name: &ServerName<'_>,
        _ocsp: &[u8],
        _now: UnixTime,
    ) -> Result<rustls::client::danger::ServerCertVerified, rustls::Error> {
        Ok(rustls::client::danger::ServerCertVerified::assertion())
    }

    fn verify_tls12_signature(
        &self,
        _message: &[u8],
        _cert: &CertificateDer<'_>,
        _dss: &DigitallySignedStruct,
    ) -> Result<HandshakeSignatureValid, rustls::Error> {
        Ok(HandshakeSignatureValid::assertion())
    }

    fn verify_tls13_signature(
        &self,
        _message: &[u8],
        _cert: &CertificateDer<'_>,
        _dss: &DigitallySignedStruct,
    ) -> Result<HandshakeSignatureValid, rustls::Error> {
        Ok(HandshakeSignatureValid::assertion())
    }

    fn supported_verify_schemes(&self) -> Vec<rustls::SignatureScheme> {
        vec![
            rustls::SignatureScheme::RSA_PKCS1_SHA1,
            rustls::SignatureScheme::ECDSA_SHA1_Legacy,
            rustls::SignatureScheme::RSA_PKCS1_SHA256,
            rustls::SignatureScheme::ECDSA_NISTP256_SHA256,
            rustls::SignatureScheme::RSA_PKCS1_SHA384,
            rustls::SignatureScheme::ECDSA_NISTP384_SHA384,
            rustls::SignatureScheme::RSA_PKCS1_SHA512,
            rustls::SignatureScheme::ECDSA_NISTP521_SHA512,
            rustls::SignatureScheme::RSA_PSS_SHA256,
            rustls::SignatureScheme::RSA_PSS_SHA384,
            rustls::SignatureScheme::RSA_PSS_SHA512,
            rustls::SignatureScheme::ED25519,
            rustls::SignatureScheme::ED448,
        ]
    }
}

pub async fn network_connect(
    address: String,
    username: String,
    event_rx: &mut UnboundedReceiver<Command>,
) -> Result<(), Error> {
    let config = ClientConfig::builder()
        .dangerous()
        .with_custom_certificate_verifier(Arc::new(NoCertificateVerification))
        .with_no_client_auth();

    let connector = TlsConnector::from(Arc::new(config));

    let addr = format!("{}:{}", address, 64738)
        .to_socket_addrs()?
        .next()
        .unwrap();

    let server_tcp = TcpStream::connect(addr).await?;
    let server_stream = connector
        //.connect("127.0.0.1".try_into()?, server_tcp)
        .connect(address.try_into().map_err(anyhow::Error::from)?, server_tcp)
        .await?;
    let (read_server, write_server) = tokio::io::split(server_stream);

    let read_codec = ClientControlCodec::new();
    let write_codec = ClientControlCodec::new();

    let mut reader = asynchronous_codec::FramedRead::new(read_server.compat(), read_codec);
    let mut writer = asynchronous_codec::FramedWrite::new(write_server.compat_write(), write_codec);

    super::network_loop(username, event_rx, reader, writer).await
}

pub fn set_default_username(username: &str) -> Option<()> {
    None
}

pub fn load_username() -> Option<String> {
    return None;
}