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*/

/**
Testcase Scenarios :
 1) Add nodes to graph with dependencies defined. Call api and verify number
    of edges and from/to list returned corresponds to the dependencies defined.
 2) Pass from and to as nullptr and verify the api returns number of edges.
 3) Pass numEdges lesser than actual number and verify the api returns from/to
    list with requested number of edges.
 4) Pass numEdges greater than actual number and verify the remaining entries
    in from/to list are set to null and number of edges actually returned will
    be written to numEdges.
 5) Validate numEdges when 0 or 1 node is present in graph.
 6) Negative Test Cases
    - Input graph parameter is a nullptr.
    - From node parameter is a nullptr.
    - To node parameter is a nullptr.
    - numEdges parameter is a nullptr.
    - Input graph parameter is uninitialized.
*/

#include <hip_test_common.hh>
#include <hip_test_checkers.hh>
#include <hip_test_kernels.hh>

#define EXPECTED_NUM_OF_EDGES 6

/**
 * Local Function to validate number of edges.
 */
static void validate_hipGraphGetEdges_fromto(size_t numEdgesToGet, int testnum,
                                             hipGraphNode_t* nodes_from, hipGraphNode_t* nodes_to,
                                             hipGraph_t graph) {
  int numEdges = static_cast<int>(numEdgesToGet);
  hipGraphNode_t* fromnode = new hipGraphNode_t[numEdges]{};
  hipGraphNode_t* tonode = new hipGraphNode_t[numEdges]{};
  hipGraphNode_t* expected_from_nodes = nodes_from;
  hipGraphNode_t* expected_to_nodes = nodes_to;
  HIP_CHECK(hipGraphGetEdges(graph, fromnode, tonode, &numEdgesToGet));
  bool nodeFound;
  int found_count = 0;
  for (int idx_from = 0; idx_from < EXPECTED_NUM_OF_EDGES; idx_from++) {
    nodeFound = false;
    int idx = 0;
    for (; idx < EXPECTED_NUM_OF_EDGES; idx++) {
      if (expected_from_nodes[idx_from] == fromnode[idx]) {
        nodeFound = true;
        break;
      }
    }
    if (nodeFound && (tonode[idx] == expected_to_nodes[idx_from])) {
      found_count++;
    }
  }
  // Validate
  if (testnum == 0) {
    REQUIRE(found_count == EXPECTED_NUM_OF_EDGES);
  } else if (testnum == 1) {
    REQUIRE(found_count == numEdges);
  } else if (testnum == 2) {
    REQUIRE(found_count == EXPECTED_NUM_OF_EDGES);
    for (int idx = (EXPECTED_NUM_OF_EDGES - 1); idx > (numEdges - 1); idx++) {
      REQUIRE(fromnode[idx] == nullptr);
      REQUIRE(tonode[idx] == nullptr);
    }
  }

  delete[] tonode;
  delete[] fromnode;
}

/**
 * Scenario 1: Finctionality tests to validate hipGraphGetEdges()
 * for different number of edges.
 */
TEST_CASE("Unit_hipGraphGetEdges_Functionality") {
  constexpr size_t N = 1024;
  constexpr size_t Nbytes = N * sizeof(int);
  constexpr auto blocksPerCU = 6;  // to hide latency
  constexpr auto threadsPerBlock = 256;
  hipGraph_t graph;
  hipGraphNode_t memset_A, memset_B, memsetKer_C;
  hipGraphNode_t memcpyH2D_A, memcpyH2D_B, memcpyD2H_C;
  hipGraphNode_t kernel_vecAdd;
  hipKernelNodeParams kernelNodeParams{};
  int *A_d, *B_d, *C_d;
  int *A_h, *B_h, *C_h;
  hipMemsetParams memsetParams{};
  int memsetVal{};
  size_t NElem{N};

  HipTest::initArrays(&A_d, &B_d, &C_d, &A_h, &B_h, &C_h, N, false);
  unsigned blocks = HipTest::setNumBlocks(blocksPerCU, threadsPerBlock, N);

  HIP_CHECK(hipGraphCreate(&graph, 0));

  memset(&memsetParams, 0, sizeof(memsetParams));
  memsetParams.dst = reinterpret_cast<void*>(A_d);
  memsetParams.value = 0;
  memsetParams.pitch = 0;
  memsetParams.elementSize = sizeof(char);
  memsetParams.width = Nbytes;
  memsetParams.height = 1;
  HIP_CHECK(hipGraphAddMemsetNode(&memset_A, graph, nullptr, 0, &memsetParams));

  memset(&memsetParams, 0, sizeof(memsetParams));
  memsetParams.dst = reinterpret_cast<void*>(B_d);
  memsetParams.value = 0;
  memsetParams.pitch = 0;
  memsetParams.elementSize = sizeof(char);
  memsetParams.width = Nbytes;
  memsetParams.height = 1;
  HIP_CHECK(hipGraphAddMemsetNode(&memset_B, graph, nullptr, 0, &memsetParams));

  void* kernelArgs1[] = {&C_d, &memsetVal, reinterpret_cast<void*>(&NElem)};
  kernelNodeParams.func = reinterpret_cast<void*>(HipTest::memsetReverse<int>);
  kernelNodeParams.gridDim = dim3(blocks);
  kernelNodeParams.blockDim = dim3(threadsPerBlock);
  kernelNodeParams.sharedMemBytes = 0;
  kernelNodeParams.kernelParams = reinterpret_cast<void**>(kernelArgs1);
  kernelNodeParams.extra = nullptr;
  HIP_CHECK(hipGraphAddKernelNode(&memsetKer_C, graph, nullptr, 0, &kernelNodeParams));

  HIP_CHECK(hipGraphAddMemcpyNode1D(&memcpyH2D_A, graph, nullptr, 0, A_d, A_h, Nbytes,
                                    hipMemcpyHostToDevice));

  HIP_CHECK(hipGraphAddMemcpyNode1D(&memcpyH2D_B, graph, nullptr, 0, B_d, B_h, Nbytes,
                                    hipMemcpyHostToDevice));

  HIP_CHECK(hipGraphAddMemcpyNode1D(&memcpyD2H_C, graph, nullptr, 0, C_h, C_d, Nbytes,
                                    hipMemcpyDeviceToHost));

  void* kernelArgs2[] = {&A_d, &B_d, &C_d, reinterpret_cast<void*>(&NElem)};
  kernelNodeParams.func = reinterpret_cast<void*>(HipTest::vectorADD<int>);
  kernelNodeParams.gridDim = dim3(blocks);
  kernelNodeParams.blockDim = dim3(threadsPerBlock);
  kernelNodeParams.sharedMemBytes = 0;
  kernelNodeParams.kernelParams = reinterpret_cast<void**>(kernelArgs2);
  kernelNodeParams.extra = nullptr;
  HIP_CHECK(hipGraphAddKernelNode(&kernel_vecAdd, graph, nullptr, 0, &kernelNodeParams));

  // Create dependencies
  HIP_CHECK(hipGraphAddDependencies(graph, &memset_A, &memcpyH2D_A, 1));
  HIP_CHECK(hipGraphAddDependencies(graph, &memset_B, &memcpyH2D_B, 1));
  HIP_CHECK(hipGraphAddDependencies(graph, &memcpyH2D_A, &kernel_vecAdd, 1));
  HIP_CHECK(hipGraphAddDependencies(graph, &memcpyH2D_B, &kernel_vecAdd, 1));
  HIP_CHECK(hipGraphAddDependencies(graph, &memsetKer_C, &kernel_vecAdd, 1));
  HIP_CHECK(hipGraphAddDependencies(graph, &kernel_vecAdd, &memcpyD2H_C, 1));

  hipGraphNode_t nodes_from[EXPECTED_NUM_OF_EDGES] = {memset_A,    memset_B,    memcpyH2D_A,
                                                      memcpyH2D_B, memsetKer_C, kernel_vecAdd};
  hipGraphNode_t nodes_to[EXPECTED_NUM_OF_EDGES] = {memcpyH2D_A,   memcpyH2D_B,   kernel_vecAdd,
                                                    kernel_vecAdd, kernel_vecAdd, memcpyD2H_C};
  // Validate hipGraphGetEdges() API
  // Scenario 1
  SECTION("Validate number of edges") {
    size_t numEdges = 0;
    HIP_CHECK(hipGraphGetEdges(graph, nullptr, nullptr, &numEdges));
    REQUIRE(numEdges == EXPECTED_NUM_OF_EDGES);
  }
  // Scenario 2
  SECTION("Validate from/to list when numEdges = num of edges") {
    validate_hipGraphGetEdges_fromto(EXPECTED_NUM_OF_EDGES, 0, nodes_from, nodes_to, graph);
  }
  // Scenario 3
  SECTION("Validate from/to list when numEdges = less than num of edges") {
    validate_hipGraphGetEdges_fromto(EXPECTED_NUM_OF_EDGES - 1, 1, nodes_from, nodes_to, graph);
  }
  // Scenario 4
  SECTION("Validate from/to list when numEdges = more than num of edges") {
    validate_hipGraphGetEdges_fromto(EXPECTED_NUM_OF_EDGES + 1, 2, nodes_from, nodes_to, graph);
  }
  // Scenario 5
  SECTION("Validate number of edges when zero or one node in graph") {
    size_t numEdges = 0;
    hipGraph_t graphempty;
    HIP_CHECK(hipGraphCreate(&graphempty, 0));
    HIP_CHECK(hipGraphGetEdges(graphempty, nullptr, nullptr, &numEdges));
    REQUIRE(numEdges == 0);
    // Add an empty node
    hipGraphNode_t emptyNode{};
    HIP_CHECK(hipGraphAddEmptyNode(&emptyNode, graphempty, nullptr, 0));
    HIP_CHECK(hipGraphGetEdges(graphempty, nullptr, nullptr, &numEdges));
    REQUIRE(numEdges == 0);
    HIP_CHECK(hipGraphDestroy(graphempty));
  }
  HipTest::freeArrays(A_d, B_d, C_d, A_h, B_h, C_h, false);
  HIP_CHECK(hipGraphDestroy(graph));
}

/**
 * Scenario 5: Negative Test Cases
 */
TEST_CASE("Unit_hipGraphGetEdges_Negative") {
  hipGraph_t graph{}, graph_uninit{};
  HIP_CHECK(hipGraphCreate(&graph, 0));
  hipGraphNode_t nodes_from[EXPECTED_NUM_OF_EDGES]{}, nodes_to[EXPECTED_NUM_OF_EDGES]{};
  size_t numEdges = 0;
  SECTION("graph is nullptr") {
    REQUIRE(hipErrorInvalidValue == hipGraphGetEdges(nullptr, nodes_from, nodes_to, &numEdges));
  }
  SECTION("from is nullptr") {
    REQUIRE(hipErrorInvalidValue == hipGraphGetEdges(graph, nullptr, nodes_to, &numEdges));
  }

  SECTION("to is nullptr") {
    REQUIRE(hipErrorInvalidValue == hipGraphGetEdges(graph, nodes_from, nullptr, &numEdges));
  }
  SECTION("numEdges is nullptr") {
    REQUIRE(hipErrorInvalidValue == hipGraphGetEdges(graph, nodes_from, nodes_to, nullptr));
  }

  SECTION("graph is uninitialized") {
    REQUIRE(hipErrorInvalidValue ==
            hipGraphGetEdges(graph_uninit, nodes_from, nodes_to, &numEdges));
  }

  HIP_CHECK(hipGraphDestroy(graph));
}