#include <gtest/gtest.h>
#include "vde/brep/parallel_boolean.h"
#include "vde/brep/modeling.h"
#include <cmath>

using namespace vde::brep;
using namespace vde::core;

TEST(ParallelBooleanTest, ThreadCount) {
    int n = parallel_thread_count();
    EXPECT_GT(n, 0);
}

TEST(ParallelBooleanTest, SetThreadCount) {
    set_parallel_threads(2);
    EXPECT_EQ(parallel_thread_count(), 2);
    set_parallel_threads(0); // reset
}

TEST(ParallelBooleanTest, FaceFaceIntersection_Empty) {
    BrepModel a, b;
    auto results = parallel_face_face_intersection(a, b);
    EXPECT_EQ(results.size(), 0u);
}

TEST(ParallelBooleanTest, FaceFaceIntersection_Boxes) {
    auto a = make_box(2, 2, 2);
    auto b = make_box(2, 2, 2);
    auto results = parallel_face_face_intersection(a, b);
    // Two identical boxes have overlapping faces
    EXPECT_GE(results.size(), 0u);
}

TEST(ParallelBooleanTest, ClassifyFaces_Empty) {
    BrepModel body;
    auto results = parallel_classify_faces(body, {});
    EXPECT_EQ(results.size(), 0u);
}

TEST(ParallelBooleanTest, ClassifyFaces_Outside) {
    auto box = make_box(2, 2, 2);
    // Point far outside the box
    std::vector<int> face_ids = {0};
    auto results = parallel_classify_faces(box, face_ids);
    EXPECT_EQ(results.size(), 1u);
}

TEST(ParallelBooleanTest, MeshUnion) {
    auto a = make_box(2, 2, 2);
    auto b = make_box(2, 2, 2);
    auto ma = a.to_mesh();
    auto mb = b.to_mesh();
    auto result = parallel_mesh_union(ma, mb);
    EXPECT_GE(result.num_vertices(), 0u);
}

TEST(ParallelBooleanTest, MeshIntersection) {
    auto a = make_box(2, 2, 2);
    auto b = make_box(2, 2, 2);
    auto result = parallel_mesh_intersection(a.to_mesh(), b.to_mesh());
    EXPECT_GE(result.num_vertices(), 0u);
}

TEST(ParallelBooleanTest, MeshDifference) {
    auto a = make_box(2, 2, 2);
    auto b = make_box(1, 1, 1);
    auto result = parallel_mesh_difference(a.to_mesh(), b.to_mesh());
    EXPECT_GE(result.num_vertices(), 0u);
}

TEST(ParallelBooleanTest, BrepUnion) {
    auto a = make_box(2, 2, 2);
    auto b = make_box(2, 2, 2);
    auto result = parallel_brep_union(a, b);
    EXPECT_GE(result.num_faces(), 1u);
}

TEST(ParallelBooleanTest, BrepIntersection) {
    auto a = make_box(2, 2, 2);
    auto b = make_box(2, 2, 2);
    auto result = parallel_brep_intersection(a, b);
    EXPECT_GE(result.num_faces(), 1u);
}

TEST(ParallelBooleanTest, BrepDifference) {
    auto a = make_box(2, 2, 2);
    auto b = make_box(2, 2, 2);
    auto result = parallel_brep_difference(a, b);
    EXPECT_GE(result.num_faces(), 1u);
}