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#pragma once
#include "script.hpp"
#include "compat/assert.hpp"
#include <utility>
#include <cr/StringView.h>
#include <cr/Pointer.h>
// ReSharper disable CppDFAUnreachableCode
namespace floormat::detail_Script {
template<typename S, typename Obj>
concept BaseScript =
requires (S& script, const std::shared_ptr<Obj>& obj, size_t& i, const Ns& ns)
{
requires std::is_base_of_v<base_script, S>;
script.on_init(obj);
script.on_update(obj, i, ns);
script.on_destroy(obj, script_destroy_reason::COUNT);
script.delete_self();
script.~S();
};
template<typename S, typename Obj>
requires requires ()
{
requires BaseScript<S, Obj>;
requires std::is_base_of_v<object, Obj>;
}
CORRADE_ALWAYS_INLINE
void concept_check() {}
} // namespace floormat::detail_Script
namespace floormat {
#define FM_ASSERT_SCRIPT_STATE(new_state) (base_script::_assert_state(_state, (new_state), __FILE__, __LINE__))
template <typename S, typename Obj> Script<S, Obj>::~Script() noexcept
{
fm_assert(_state < script_lifecycle::COUNT);
switch (_state)
{
case script_lifecycle::no_init:
case script_lifecycle::torn_down:
_state = (script_lifecycle)-1;
break;
case script_lifecycle::COUNT:
std::unreachable();
case script_lifecycle::created:
case script_lifecycle::destroying:
case script_lifecycle::initializing:
fm_abort("invalid state '%s' in script destructor",
base_script::state_name(_state).data());
}
}
template <typename S, typename Obj>
Script<S, Obj>::Script(): ptr{nullptr}, _state{script_lifecycle::no_init}
{
detail_Script::concept_check<S, Obj>();
}
template <typename S, typename Obj> script_lifecycle Script<S, Obj>::state() const { return _state; }
template<typename S, typename Obj> Script<S, Obj>::operator bool() const { return ptr; }
template <typename S, typename Obj>
S* Script<S, Obj>::operator->()
{
FM_ASSERT_SCRIPT_STATE(script_lifecycle::created);
fm_debug_assert(ptr);
return ptr;
}
template<typename S, typename Obj>
void Script<S, Obj>::do_create(S* p)
{
if (!p)
p = make_empty();
FM_ASSERT_SCRIPT_STATE(script_lifecycle::no_init);
_state = script_lifecycle::initializing;
ptr = p;
}
template<typename S, typename Obj>
void Script<S, Obj>::do_create(Pointer<S> p)
{
do_create(p.release());
}
template <typename S, typename Obj>
void Script<S, Obj>::do_initialize(const std::shared_ptr<Obj>& obj)
{
switch (_state)
{
default:
FM_ASSERT_SCRIPT_STATE(script_lifecycle::initializing);
std::unreachable();
case script_lifecycle::no_init:
ptr = make_empty();
[[fallthrough]];
case script_lifecycle::initializing:
_state = script_lifecycle::created;
ptr->on_init(obj);
return;
}
std::unreachable();
}
template <typename S, typename Obj>
void Script<S, Obj>::do_reassign(S* p, const std::shared_ptr<Obj>& obj)
{
if (!p) [[unlikely]]
return do_clear(obj);
FM_ASSERT_SCRIPT_STATE(script_lifecycle::created);
fm_debug_assert(ptr);
ptr->on_destroy(obj, script_destroy_reason::unassign);
ptr->delete_self();
ptr = p;
p->on_init(obj);
}
template <typename S, typename Obj>
void Script<S, Obj>::do_reassign(Pointer<S> p, const std::shared_ptr<Obj>& obj)
{
return do_reassign(p.release(), obj);
}
template <typename S, typename Obj>
void Script<S, Obj>::do_clear(const std::shared_ptr<Obj>& obj)
{
FM_ASSERT_SCRIPT_STATE(script_lifecycle::created);
fm_debug_assert(ptr);
ptr->on_destroy(obj, script_destroy_reason::unassign);
ptr->delete_self();
ptr = make_empty();
}
template <typename S, typename Obj>
void Script<S, Obj>::do_destroy_pre(const std::shared_ptr<Obj>& obj, script_destroy_reason r)
{
FM_ASSERT_SCRIPT_STATE(script_lifecycle::created);
_state = script_lifecycle::destroying;
ptr->on_destroy(obj, r);
}
template <typename S, typename Obj>
void Script<S, Obj>::do_finish_destroy()
{
FM_ASSERT_SCRIPT_STATE(script_lifecycle::destroying);
_state = script_lifecycle::torn_down;
ptr->delete_self();
ptr = nullptr;
}
template <typename S, typename Obj>
void Script<S, Obj>::do_ensure_torn_down()
{
FM_ASSERT_SCRIPT_STATE(script_lifecycle::torn_down);
}
template <typename S, typename Obj>
void Script<S, Obj>::do_error_unwind()
{
fm_assert(_state < script_lifecycle::COUNT);
switch (_state)
{
using enum script_lifecycle;
case COUNT: std::unreachable();
case created:
case initializing:
case destroying:
ptr->delete_self();
ptr = nullptr;
break;
case no_init:
case torn_down:
break;
}
}
#undef FM_ASSERT_SCRIPT_STATE
} // namespace floormat
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