#![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::role::broadcast::RoleBroadcast;
use mpstthree::role::end::RoleEnd;
use mpstthree::{
    bundle_struct_fork_close_multi, create_fn_choose_mpst_multi_to_all_bundle,
    create_multiple_normal_name_short, create_multiple_normal_role_short,
    create_recv_mpst_session_bundle, create_send_mpst_session_bundle, offer_mpst,
};

use std::error::Error;

// Create the new MeshedChannels for three participants and the close and fork functions
bundle_struct_fork_close_multi!(close_mpst_multi, fork_mpst, MeshedChannels, 2);

// Create new roles
// normal
create_multiple_normal_role_short!(A, B);

// Create new names
create_multiple_normal_name_short!(A, B);

// Create new send functions
// A
create_send_mpst_session_bundle!(
    send_mpst_a_to_b, RoleB, 1 | =>
    NameA, MeshedChannels, 2
);

// B
create_send_mpst_session_bundle!(
    send_mpst_b_to_a, RoleA, 1 | =>
    NameB, MeshedChannels, 2
);

// Create new recv functions and related types
// A
create_recv_mpst_session_bundle!(
    recv_mpst_a_from_b, RoleB, 1 | =>
    NameA, MeshedChannels, 2
);

// B
create_recv_mpst_session_bundle!(
    recv_mpst_b_from_a, RoleA, 1 | =>
    NameB, MeshedChannels, 2
);

// Types
// A
enum Branching0fromBtoA {
    Forward(MeshedChannels<Send<(), RecursAtoB>, RoleB<RoleB<RoleEnd>>, NameA>),
    Backward(MeshedChannels<Recv<(), RecursAtoB>, RoleB<RoleB<RoleEnd>>, NameA>),
    Done(MeshedChannels<End, RoleEnd, NameA>),
}
type RecursAtoB = <Choose0fromBtoA as Session>::Dual;

// B
type Choose0fromBtoA = Send<Branching0fromBtoA, End>;
type EndpointDoneB = MeshedChannels<End, RoleEnd, NameB>;
type EndpointForwardB = MeshedChannels<Recv<(), Choose0fromBtoA>, RoleA<RoleBroadcast>, NameB>;
type EndpointBackwardB = MeshedChannels<Send<(), Choose0fromBtoA>, RoleA<RoleBroadcast>, NameB>;

// Creating the MP sessions
type EndpointA = MeshedChannels<RecursAtoB, RoleB<RoleEnd>, NameA>;
type EndpointB = MeshedChannels<Choose0fromBtoA, RoleBroadcast, NameB>;

create_fn_choose_mpst_multi_to_all_bundle!(
    done_from_b_to_all, forward_from_b_to_all, backward_from_b_to_all, =>
    Done, Forward, Backward, =>
    EndpointDoneB, EndpointForwardB, EndpointBackwardB, =>
    Branching0fromBtoA, =>
    NameA, =>
    NameB, MeshedChannels, 2
);

fn endpoint_a(s: EndpointA) -> Result<(), Box<dyn Error>> {
    offer_mpst!(s, recv_mpst_a_from_b, {
        Branching0fromBtoA::Done(s) => {
            close_mpst_multi(s)
        },
        Branching0fromBtoA::Forward(s) => {
            let s = send_mpst_a_to_b((), s);
            endpoint_a(s)
        },
        Branching0fromBtoA::Backward(s) => {
            let (_, s) = recv_mpst_a_from_b(s)?;
            endpoint_a(s)
        },
    })
}

fn endpoint_b(s: EndpointB) -> Result<(), Box<dyn Error>> {
    recurs_b(s, LOOPS)
}

fn recurs_b(s: EndpointB, index: i64) -> Result<(), Box<dyn Error>> {
    match index {
        0 => {
            let s = done_from_b_to_all(s);

            close_mpst_multi(s)
        }
        i if i % 2 == 0 => {
            let s = forward_from_b_to_all(s);

            let (_, s) = recv_mpst_b_from_a(s)?;

            recurs_b(s, i - 1)
        }
        i => {
            let s = backward_from_b_to_all(s);

            let s = send_mpst_b_to_a((), s);

            recurs_b(s, i - 1)
        }
    }
}

fn aux() {
    let (thread_a, thread_b) = fork_mpst(black_box(endpoint_a), black_box(endpoint_b));

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

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

static LOOPS: i64 = 0;

pub fn ring(c: &mut Criterion) {
    c.bench_function(&format!("ring two empty {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
}