#include "arch/user/main.hpp"

#include "arch/context_switching/syscall/main.hpp"
#include "arch/memory/heap/global_heap_allocator.hpp"

#include <algorithm>
#include <array>
#include <atomic>
#include <ranges>

namespace teachos::arch::user
{
  auto main() -> void
  {
    // Test writing to VGA Buffer
    char constexpr syscall_message[] = "Successfully entered user mode and wrote to VGA buffer via syscall!";
    context_switching::syscall::syscall(context_switching::syscall::type::WRITE,
                                        {reinterpret_cast<uint64_t>(&syscall_message)});

    // Test C++ standard library
    std::array<std::atomic<uint8_t>, 4> array_test = {std::atomic<uint8_t>{5}, std::atomic<uint8_t>{10},
                                                      std::atomic<uint8_t>{15}, std::atomic<uint8_t>{20}};
    std::ranges::for_each(array_test, [](auto & item) {
      auto value = item.load();
      uint8_t max_value = std::max(value, uint8_t{10});
      item.exchange(max_value + 2);
    });

    // Test user heap
    auto address = memory::heap::global_heap_allocator::malloc(8U);
    (void)address;

    for (;;)
    {
    }
  }
}  // namespace teachos::arch::user