#![allow(
    clippy::large_enum_variant,
    clippy::type_complexity,
    clippy::too_many_arguments
)]

use criterion::{black_box, criterion_group, criterion_main, Criterion};

use mpstthree::binary::struct_trait::{end::End, recv::Recv, send::Send, session::Session};
use mpstthree::generate;
use mpstthree::role::broadcast::RoleBroadcast;
use mpstthree::role::end::RoleEnd;

use std::error::Error;

// Create new roles
generate!("rec_and_cancel", MeshedChannels, A, B, C, D);

// Types
// A
enum Branching0fromDtoA {
    Forward(MeshedChannels<Send<(), End>, End, RecursAtoD, RoleB<RoleD<RoleEnd>>, NameA>),
    Backward(MeshedChannels<Recv<(), End>, End, RecursAtoD, RoleB<RoleD<RoleEnd>>, NameA>),
    Done(MeshedChannels<End, End, End, RoleEnd, NameA>),
}
type RecursAtoD = <Choose0fromDtoA as Session>::Dual;

// B
enum Branching0fromDtoB {
    Forward(
        MeshedChannels<
            Recv<(), End>,
            Send<(), End>,
            RecursBtoD,
            RoleA<RoleC<RoleD<RoleEnd>>>,
            NameB,
        >,
    ),
    Backward(
        MeshedChannels<
            Send<(), End>,
            Recv<(), End>,
            RecursBtoD,
            RoleC<RoleA<RoleD<RoleEnd>>>,
            NameB,
        >,
    ),
    Done(MeshedChannels<End, End, End, RoleEnd, NameB>),
}
type RecursBtoD = <Choose0fromDtoB as Session>::Dual;

// C
enum Branching0fromDtoC {
    Forward(
        MeshedChannels<
            End,
            Recv<(), End>,
            Send<(), RecursCtoD>,
            RoleB<RoleD<RoleD<RoleEnd>>>,
            NameC,
        >,
    ),
    Backward(
        MeshedChannels<
            End,
            Send<(), End>,
            Recv<(), RecursCtoD>,
            RoleD<RoleB<RoleD<RoleEnd>>>,
            NameC,
        >,
    ),
    Done(MeshedChannels<End, End, End, RoleEnd, NameC>),
}
type RecursCtoD = <Choose0fromDtoC as Session>::Dual;

// D
type Choose0fromDtoA = Send<Branching0fromDtoA, End>;
type Choose0fromDtoB = Send<Branching0fromDtoB, End>;
type Choose0fromDtoC = Send<Branching0fromDtoC, End>;
type EndpointForwardD = MeshedChannels<
    Choose0fromDtoA,
    Choose0fromDtoB,
    Recv<(), Choose0fromDtoC>,
    RoleC<RoleBroadcast>,
    NameD,
>;
type EndpointBackwardD = MeshedChannels<
    Choose0fromDtoA,
    Choose0fromDtoB,
    Send<(), Choose0fromDtoC>,
    RoleC<RoleBroadcast>,
    NameD,
>;

// Creating the MP sessions
type EndpointA = MeshedChannels<End, End, RecursAtoD, RoleD<RoleEnd>, NameA>;
type EndpointB = MeshedChannels<End, End, RecursBtoD, RoleD<RoleEnd>, NameB>;
type EndpointC = MeshedChannels<End, End, RecursCtoD, RoleD<RoleEnd>, NameC>;
type EndpointD =
    MeshedChannels<Choose0fromDtoA, Choose0fromDtoB, Choose0fromDtoC, RoleBroadcast, NameD>;

fn endpoint_a(s: EndpointA) -> Result<(), Box<dyn Error>> {
    offer_mpst!(s, {
        Branching0fromDtoA::Done(s) => {
            s.close()
        },
        Branching0fromDtoA::Forward(s) => {
            let s = s.send(())?;
            endpoint_a(s)
        },
        Branching0fromDtoA::Backward(s) => {
            let (_, s) = s.recv()?;
            endpoint_a(s)
        },
    })
}

#[inline]
fn endpoint_b(s: EndpointB) -> Result<(), Box<dyn Error>> {
    offer_mpst!(s, {
        Branching0fromDtoB::Done(s) => {
            s.close()
        },
        Branching0fromDtoB::Forward(s) => {
            let ((), s) = s.recv()?;
            let s = s.send(())?;
            endpoint_b(s)
        },
        Branching0fromDtoB::Backward(s) => {
            let ((), s) = s.recv()?;
            let s = s.send(())?;
            endpoint_b(s)
        },
    })
}

#[inline]
fn endpoint_c(s: EndpointC) -> Result<(), Box<dyn Error>> {
    offer_mpst!(s, {
        Branching0fromDtoC::Done(s) => {
            s.close()
        },
        Branching0fromDtoC::Forward(s) => {
            let ((), s) = s.recv()?;
            let s = s.send(())?;
            endpoint_c(s)
        },
        Branching0fromDtoC::Backward(s) => {
            let ((), s) = s.recv()?;
            let s = s.send(())?;
            endpoint_c(s)
        },
    })
}

#[inline]
fn endpoint_d(s: EndpointD) -> Result<(), Box<dyn Error>> {
    let mut temp_s = s;

    for i in 1..LOOPS {
        temp_s = recurs_d(temp_s, i)?;
    }

    let s = choose_mpst_d_to_all!(
        temp_s,
        Branching0fromDtoA::Done,
        Branching0fromDtoB::Done,
        Branching0fromDtoC::Done
    );

    s.close()
}

fn recurs_d(s: EndpointD, index: i64) -> Result<EndpointD, Box<dyn Error>> {
    match index {
        i if i % 2 == 0 => {
            let s: EndpointForwardD = choose_mpst_d_to_all!(
                s,
                Branching0fromDtoA::Forward,
                Branching0fromDtoB::Forward,
                Branching0fromDtoC::Forward
            );

            let (_, s) = s.recv()?;

            Ok(s)
        }
        _ => {
            let s: EndpointBackwardD = choose_mpst_d_to_all!(
                s,
                Branching0fromDtoA::Backward,
                Branching0fromDtoB::Backward,
                Branching0fromDtoC::Backward
            );

            let s = s.send(())?;

            Ok(s)
        }
    }
}

fn aux() {
    let (thread_a, thread_b, thread_c, thread_d) = fork_mpst(
        black_box(endpoint_a),
        black_box(endpoint_b),
        black_box(endpoint_c),
        black_box(endpoint_d),
    );

    thread_a.join().unwrap();
    thread_b.join().unwrap();
    thread_c.join().unwrap();
    thread_d.join().unwrap();
}

/////////////////////////

static LOOPS: i64 = 100;

pub fn ring(c: &mut Criterion) {
    c.bench_function(&format!("ring four baking inline {LOOPS}"), |b| b.iter(aux));
}

/////////////////////////

criterion_group! {
    name = bench;
    config = Criterion::default().significance_level(0.05).without_plots().sample_size(100000);
    targets = ring,
}

criterion_main! {
    bench
}