/*
    Copyright (c) 2005-2017 Intel Corporation

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.




*/

#include "harness_graph.h"

#include "tbb/task_scheduler_init.h"

#define N 300
#define T 4
#define M 4

template< typename R >
void simple_read_write_tests() {
    tbb::flow::graph g;
    tbb::flow::write_once_node<R> n(g);

    for ( int t = 0; t < T; ++t ) {
        R v0(0);
        harness_counting_receiver<R> r[M];

        ASSERT( n.is_valid() == false, NULL );
        ASSERT( n.try_get( v0 ) == false, NULL );

        if ( t % 2 ) {
            ASSERT( n.try_put( static_cast<R>(N+1) ), NULL );
            ASSERT( n.is_valid() == true, NULL );
            ASSERT( n.try_get( v0 ) == true, NULL );
            ASSERT( v0 == R(N+1), NULL );
       }

        for (int i = 0; i < M; ++i) {
           tbb::flow::make_edge( n, r[i] );
        }

        if ( t%2 ) {
            for (int i = 0; i < M; ++i) {
                 size_t c = r[i].my_count;
                 ASSERT( int(c) == 1, NULL );
            }
        }

        for (int i = 1; i <= N; ++i ) {
            R v1(static_cast<R>(i));

            bool result = n.try_put( v1 );
            if ( !(t%2) && i == 1 )
                ASSERT( result == true, NULL );
            else
                ASSERT( result == false, NULL );

            ASSERT( n.is_valid() == true, NULL );

            for (int j = 0; j < N; ++j ) {
                R v2(0);
                ASSERT( n.try_get( v2 ), NULL );
                if ( t%2 )
                    ASSERT( R(N+1) == v2, NULL );
                else
                    ASSERT( R(1) == v2, NULL );
            }
        }
        for (int i = 0; i < M; ++i) {
             size_t c = r[i].my_count;
             ASSERT( int(c) == 1, NULL );
        }
        for (int i = 0; i < M; ++i) {
           tbb::flow::remove_edge( n, r[i] );
        }
        ASSERT( n.try_put( R(0) ) == false, NULL );
        for (int i = 0; i < M; ++i) {
             size_t c = r[i].my_count;
             ASSERT( int(c) == 1, NULL );
        }
        n.clear();
        ASSERT( n.is_valid() == false, NULL );
        ASSERT( n.try_get( v0 ) == false, NULL );
    }
}

template< typename R >
class native_body : NoAssign {
    tbb::flow::write_once_node<R> &my_node;

public:

     native_body( tbb::flow::write_once_node<R> &n ) : my_node(n) {}

     void operator()( int i ) const {
         R v1(static_cast<R>(i));
         ASSERT( my_node.try_put( v1 ) == false, NULL );
         ASSERT( my_node.is_valid() == true, NULL );
         ASSERT( my_node.try_get( v1 ) == true, NULL );
         ASSERT( v1 == R(-1), NULL );
     }
};

template< typename R >
void parallel_read_write_tests() {
    tbb::flow::graph g;
    tbb::flow::write_once_node<R> n(g);
    //Create a vector of identical nodes
    std::vector< tbb::flow::write_once_node<R> > wo_vec(2, n);

    for (size_t node_idx=0; node_idx<wo_vec.size(); ++node_idx) {
    for ( int t = 0; t < T; ++t ) {
        harness_counting_receiver<R> r[M];

        for (int i = 0; i < M; ++i) {
           tbb::flow::make_edge( wo_vec[node_idx], r[i] );
        }
        R v0;
        ASSERT( wo_vec[node_idx].is_valid() == false, NULL );
        ASSERT( wo_vec[node_idx].try_get( v0 ) == false, NULL );

        ASSERT( wo_vec[node_idx].try_put( R(-1) ), NULL );

        NativeParallelFor( N, native_body<R>( wo_vec[node_idx] ) );

        for (int i = 0; i < M; ++i) {
             size_t c = r[i].my_count;
             ASSERT( int(c) == 1, NULL );
        }
        for (int i = 0; i < M; ++i) {
           tbb::flow::remove_edge( wo_vec[node_idx], r[i] );
        }
        ASSERT( wo_vec[node_idx].try_put( R(0) ) == false, NULL );
        for (int i = 0; i < M; ++i) {
             size_t c = r[i].my_count;
             ASSERT( int(c) == 1, NULL );
        }
        wo_vec[node_idx].clear();
        ASSERT( wo_vec[node_idx].is_valid() == false, NULL );
        ASSERT( wo_vec[node_idx].try_get( v0 ) == false, NULL );
    }
    }
}

int TestMain() {
    simple_read_write_tests<int>();
    simple_read_write_tests<float>();
    for( int p=MinThread; p<=MaxThread; ++p ) {
        tbb::task_scheduler_init init(p);
        parallel_read_write_tests<int>();
        parallel_read_write_tests<float>();
    }
#if TBB_PREVIEW_FLOW_GRAPH_FEATURES
    test_extract_on_node<tbb::flow::write_once_node, int>();
#endif
    return Harness::Done;
}

