#include <onnx_test.hpp>

TEST_CASE(reversesequence_batch_test)
{
    migraphx::program p;
    auto* mm = p.get_main_module();

    int batch_axis = 0;
    int time_axis  = 1;

    migraphx::shape sx{migraphx::shape::float_type, {4, 4}};
    auto input = mm->add_parameter("x", sx);

    std::vector<int64_t> sequence_lens = {1, 2, 3, 4};
    mm->add_literal({{migraphx::shape::int64_type, {4}}, sequence_lens});

    int batch_size = sx.lens()[batch_axis];
    int time_size  = sx.lens()[time_axis];

    auto add_slice =
        [&mm, &input, batch_axis, time_axis](int b_start, int b_end, int t_start, int t_end) {
            return mm->add_instruction(migraphx::make_op("slice",
                                                         {{"axes", {batch_axis, time_axis}},
                                                          {"starts", {b_start, t_start}},
                                                          {"ends", {b_end, t_end}}}),
                                       input);
        };
    auto ret = add_slice(0, 1, 0, time_size);
    for(int b = 1; b < batch_size; ++b)
    {
        auto s0 = add_slice(b, b + 1, 0, sequence_lens[b]);
        s0      = mm->add_instruction(migraphx::make_op("reverse", {{"axes", {time_axis}}}), s0);
        if(sequence_lens[b] < time_size)
        {
            auto s1 = add_slice(b, b + 1, sequence_lens[b], time_size);
            s0 = mm->add_instruction(migraphx::make_op("concat", {{"axis", time_axis}}), s0, s1);
        }
        ret = mm->add_instruction(migraphx::make_op("concat", {{"axis", batch_axis}}), ret, s0);
    }
    mm->add_return({ret});

    auto prog = migraphx::parse_onnx("reversesequence_batch_test.onnx");
    EXPECT(p == prog);
}