#include "Loader.hpp"
#include "lib/Function.hpp"
#include "lib/StaticFunction.hpp"
#include "lib/config.in.hpp"
#include <dlfcn.h>

namespace jk
{
  /*explicit*/ Loader::Loader(std::shared_ptr<VM> vm,
                              std::shared_ptr<StaticPass> static_pass,
                              std::shared_ptr<Compiler> compiler,
                              std::shared_ptr<SymTable> sym)
    : m_vm { vm }
    , m_static_pass { static_pass }
    , m_compiler { compiler }
    , m_sym { sym }
  {
  }

  /*virtual*/ Loader::~Loader()
  {
  }

  void Loader::load()
  {
    for (auto entry: std::filesystem::directory_iterator(JOKO_LIBDIR))
      {
        if (entry.path().extension() == ".so")
          {
            void* handle = dlopen(entry.path().string().c_str(), RTLD_LAZY);
            assert(handle);
            typedef void(*func)(Loader&);
            func f = (func) dlsym(handle, "lib");
            assert(f);

            f(*this);
          }
      }
  }

  void Loader::declare(std::string const& name, foreign_t body)
  {
    auto fun = std::make_shared<Function>(body);

    auto fun_val = Value::make_function(fun);
    size_t addr = m_vm->push_heap(fun_val);

    auto ref = Value::make_ref(addr);
    size_t global_addr = m_sym->declare_global(name,
                                               fun_val->type().lock(),
                                               Loc {"global", 1, 1});
    m_vm->set_global(global_addr, ref);
  }

  void Loader::declare_static(std::string const& name, static_fun_t body)
  {
    m_static_pass->add_static(name);
    auto fun = std::make_shared<StaticFunction>(body);
    m_compiler->declare_static(name, fun);
  }
}