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

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_cancel, create_fn_choose_mpst_multi_to_all_bundle,
    create_multiple_normal_role_short, create_recv_mpst_session_bundle,
    create_send_mpst_cancel_bundle, offer_mpst, create_multiple_normal_name_short
};

use std::error::Error;

// Create the new MeshedChannels for four participants and the close and fork functions
bundle_struct_fork_close_multi_cancel!(close_mpst_multi, fork_mpst, MeshedChannels, 4);

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

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

// Create new send functions
// A
create_send_mpst_cancel_bundle!(
    send_mpst_a_to_b, RoleB, 1 | =>
    NameA, MeshedChannels, 4
);

// B
create_send_mpst_cancel_bundle!(
    send_mpst_b_to_a, RoleA, 1 |
    send_mpst_b_to_c, RoleC, 2 | =>
    NameB, MeshedChannels, 4
);

// C
create_send_mpst_cancel_bundle!(
    send_mpst_c_to_b, RoleB, 2 |
    send_mpst_c_to_d, RoleD, 3 | =>
    NameC, MeshedChannels, 4
);

// D
create_send_mpst_cancel_bundle!(
    send_mpst_d_to_c, RoleC, 3 | =>
    NameD, MeshedChannels, 4
);

// Create new recv functions and related types
// A
create_recv_mpst_session_bundle!(
    recv_mpst_a_from_b, RoleB, 1 |
    recv_mpst_a_from_d, RoleD, 3 | =>
    NameA, MeshedChannels, 4
);

// B
create_recv_mpst_session_bundle!(
    recv_mpst_b_from_a, RoleA, 1 |
    recv_mpst_b_from_c, RoleC, 2 |
    recv_mpst_b_from_d, RoleD, 3 | =>
    NameB, MeshedChannels, 4
);

// C
create_recv_mpst_session_bundle!(
    recv_mpst_c_from_b, RoleB, 2 |
    recv_mpst_c_from_d, RoleD, 3 | =>
    NameC, MeshedChannels, 4
);

// D
create_recv_mpst_session_bundle!(
    recv_mpst_d_from_c, RoleC, 3 | =>
    NameD, MeshedChannels, 4
);

// 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 EndpointDoneD = MeshedChannels<End, End, End, RoleEnd, NameD>;
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>;

create_fn_choose_mpst_multi_to_all_bundle!(
    done_from_d_to_all, forward_from_d_to_all, backward_from_d_to_all, =>
    Done, Forward, Backward, =>
    EndpointDoneD, EndpointForwardD, EndpointBackwardD, =>
    Branching0fromDtoA,
    Branching0fromDtoB,
    Branching0fromDtoC, =>
    NameA, NameB, NameC, =>
    NameD, MeshedChannels, 4
);

fn endpoint_a(s: EndpointA) -> Result<(), Box<dyn Error>> {
    offer_mpst!(s, recv_mpst_a_from_d, {
        Branching0fromDtoA::Done(s) => {
            close_mpst_multi(s)
        },
        Branching0fromDtoA::Forward(s) => {
            let s = send_mpst_a_to_b((), s)?;
            endpoint_a(s)
        },
        Branching0fromDtoA::Backward(s) => {
            let (_, s) = recv_mpst_a_from_b(s)?;
            endpoint_a(s)
        },
    })
}

fn endpoint_b(s: EndpointB) -> Result<(), Box<dyn Error>> {
    offer_mpst!(s, recv_mpst_b_from_d, {
        Branching0fromDtoB::Done(s) => {
            close_mpst_multi(s)
        },
        Branching0fromDtoB::Forward(s) => {
            let ((), s) = recv_mpst_b_from_a(s)?;
            let s = send_mpst_b_to_c((), s)?;
            endpoint_b(s)
        },
        Branching0fromDtoB::Backward(s) => {
            let ((), s) = recv_mpst_b_from_c(s)?;
            let s = send_mpst_b_to_a((), s)?;
            endpoint_b(s)
        },
    })
}

fn endpoint_c(s: EndpointC) -> Result<(), Box<dyn Error>> {
    offer_mpst!(s, recv_mpst_c_from_d, {
        Branching0fromDtoC::Done(s) => {
            close_mpst_multi(s)
        },
        Branching0fromDtoC::Forward(s) => {
            let ((), s) = recv_mpst_c_from_b(s)?;
            let s = send_mpst_c_to_d((), s)?;
            endpoint_c(s)
        },
        Branching0fromDtoC::Backward(s) => {
            let ((), s) = recv_mpst_c_from_d(s)?;
            let s = send_mpst_c_to_b((), s)?;
            endpoint_c(s)
        },
    })
}

fn endpoint_d(s: EndpointD) -> Result<(), Box<dyn Error>> {
    recurs_d(s, 100)
}

fn recurs_d(s: EndpointD, index: i64) -> Result<(), Box<dyn Error>> {
    match index {
        0 => {
            let s = done_from_d_to_all(s);

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

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

            recurs_d(s, i - 1)
        }
        i => {
            let s = backward_from_d_to_all(s);

            let s = send_mpst_d_to_c((), s)?;

            recurs_d(s, i - 1)
        }
    }
}

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

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