#include "kernel/cpu.hpp"

#include "kapi/cpu.hpp"
#include "kapi/system.hpp"

#include <kstd/print>

namespace kernel::cpu
{

  namespace
  {
    struct exception_handler : kapi::cpu::exception_handler
    {
      auto handle(kapi::cpu::exception const & context) -> bool override
      {
        kstd::println(kstd::print_sink::stderr, "[OS:CPU] {} @ {:#018x}", context.type, context.instruction_pointer);
        switch (context.type)
        {
          case kapi::cpu::exception::type::page_fault:
            return handle_page_fault(context);
          default:
            return false;
        }
      }

    private:
      auto handle_page_fault(kapi::cpu::exception const & context) -> bool
      {
        kstd::println(kstd::print_sink::stderr, "\tFault address: {:#018x}", context.access_address);
        kstd::println(kstd::print_sink::stderr, "\tPresent: {}", context.is_present);
        kstd::println(kstd::print_sink::stderr, "\tWrite: {}", context.is_write_access);
        kstd::println(kstd::print_sink::stderr, "\tUser: {}", context.is_user_mode);

        kapi::system::panic("Halting the system due to an unrecoverable page fault.");
      }
    } static constinit handler;
  }  // namespace

  auto init() -> void
  {
    kapi::cpu::set_exception_handler(handler);
  }

}  // namespace kernel::cpu