#define TEST_NO_MAIN
#include "acutest.h"
#include <filesystem>
#include <fstream>
#include <cmath>
#include "../include/scripting/ScriptEngine.h"
#include "physfs_test_utils.h"

void test_math_bindings(void) {
    std::filesystem::path tmpDir = std::filesystem::current_path() / "tmp_math";
    std::filesystem::create_directories(tmpDir);
    std::filesystem::path scriptPath = tmpDir / "math_test.as";

    {
        std::ofstream script(scriptPath);
        script << "float testSin = Math::Sin(1.57079632679f);\n";
        script << "float testCos = Math::Cos(0.0f);\n";
        script << "float testTan = Math::Tan(0.78539816339f);\n";
        script << "float testSqrt = Math::Sqrt(25.0f);\n";
        script << "float testPow = Math::Pow(2.0f, 8.0f);\n";
        script << "float testAbs = Math::Abs(-42.5f);\n";
    }

    TEST_CHECK(InitPhysFSTest(tmpDir) == true);
    TEST_CHECK(MountPhysFSTest(tmpDir, "") == true);

    ScriptEngine se;
    TEST_CHECK(se.Initialize() == true);
    bool compiled = se.CompileScript("math_test.as");
    TEST_CHECK(compiled == true);

    asIScriptEngine* engine = se.GetEngine();
    TEST_CHECK(engine != nullptr);
    asIScriptModule* module = engine ? engine->GetModule("main") : nullptr;
    TEST_CHECK(module != nullptr);

    auto fetchValue = [module](const char* name) -> float {
        int idx = module->GetGlobalVarIndexByName(name);
        TEST_CHECK_(idx >= 0, "Global '%s' not found", name);
        if (idx < 0)
            return 0.0f;
        void* address = module->GetAddressOfGlobalVar(idx);
        TEST_CHECK_(address != nullptr, "Global '%s' address null", name);
        if (!address)
            return 0.0f;
        return *static_cast<float*>(address);
    };

    const float sinVal = fetchValue("testSin");
    const float cosVal = fetchValue("testCos");
    const float tanVal = fetchValue("testTan");
    const float sqrtVal = fetchValue("testSqrt");
    const float powVal = fetchValue("testPow");
    const float absVal = fetchValue("testAbs");

    TEST_CHECK(std::fabs(sinVal - 1.0f) < 1e-4f);
    TEST_CHECK(std::fabs(cosVal - 1.0f) < 1e-4f);
    TEST_CHECK(std::fabs(tanVal - 1.0f) < 1e-3f);
    TEST_CHECK(std::fabs(sqrtVal - 5.0f) < 1e-4f);
    TEST_CHECK(std::fabs(powVal - 256.0f) < 1e-3f);
    TEST_CHECK(std::fabs(absVal - 42.5f) < 1e-4f);

    se.Shutdown();

    ShutdownPhysFSTest();

    std::filesystem::remove(scriptPath);
    std::filesystem::remove(tmpDir);
}