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#include "event.hpp"
#include "dynamic-array.hpp"
#include <type_traits>
struct BaseEventBucket {
char name[16] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
};
template<typename Fn>
struct EventBucket : public BaseEventBucket {
using BaseEventBucket::name;
DynArray<Fn> callbacks{8};
};
using EventArr = DynArray<EventBucket<EventHandler>>;
using TickArr = DynArray<EventBucket<TickEvent>>;
EventArr eventBuckets{0, nullptr};
TickArr tickBuckets{0, nullptr};
template<typename Fn>
void EventBucketFind(const char *name, BaseEventBucket*& bkt) {
assert(strlen(name) <= 16);
char safeName[16];
memset(safeName, '\0', 16);
memcpy(safeName, name, strlen(name));
BaseEventBucket *baseBkt = nullptr;
DynArrayBase *arr = nullptr;
if constexpr(std::is_same<Fn, EventHandler>::value) {
arr = &eventBuckets;
}
if constexpr(std::is_same<Fn, TickEvent>::value) {
arr = &tickBuckets;
}
assert(arr != nullptr);
for (long i = 0; i < arr->elementCount; ++i) {
if constexpr(std::is_same<Fn, EventHandler>::value) {
EventArr &tArr = *reinterpret_cast<EventArr *>(arr);
baseBkt = &tArr[i];
}
if constexpr(std::is_same<Fn, TickEvent>::value) {
TickArr &tArr = *reinterpret_cast<TickArr *>(arr);
baseBkt = &tArr[i];
}
assert(baseBkt != nullptr);
if (strncmp(safeName, baseBkt->name, 16) == 0) {
bkt = baseBkt;
return;
}
}
if constexpr(std::is_same<Fn, EventHandler>::value) {
EventArr &tArr = *reinterpret_cast<EventArr *>(arr);
bkt = &tArr.Push();
}
if constexpr(std::is_same<Fn, TickEvent>::value) {
TickArr &tArr = *reinterpret_cast<TickArr *>(arr);
bkt = &tArr.Push();
}
assert(bkt != nullptr);
memcpy(bkt->name, safeName, 16);
}
template<>
void Event_RegisterCallback<EventHandler>(const char *name, EventHandler handler) {
assert(handler != nullptr);
BaseEventBucket *bkt = nullptr;
EventBucketFind<EventHandler>(name, bkt);
EventBucket<EventHandler> *tBkt = reinterpret_cast<EventBucket<EventHandler> *>(bkt);
tBkt->callbacks.Push(handler);
}
template<>
void Event_UnregisterCallback<EventHandler>(const char *name, EventHandler handler) {
assert(handler != nullptr);
BaseEventBucket *bkt = nullptr;
EventBucketFind<EventHandler>(name, bkt);
EventBucket<EventHandler> *tBkt = reinterpret_cast<EventBucket<EventHandler> *>(bkt);
for (int64_t i = 0; i < tBkt->callbacks.Count(); ++i) {
if (tBkt->callbacks[i] == handler) {
tBkt->callbacks.Remove(i);
break;
}
}
}
template<>
void Event_Dispatch<EventHandler>(const char *name) {
BaseEventBucket *bkt = nullptr;
EventBucketFind<EventHandler>(name, bkt);
EventBucket<EventHandler> *tBkt = reinterpret_cast<EventBucket<EventHandler> *>(bkt);
for (int64_t i = 0; i < tBkt->callbacks.Count(); ++i) {
tBkt->callbacks[i]();
}
}
template<>
void Event_RegisterCallback<TickEvent>(const char *name, TickEvent handler) {
assert(handler != nullptr);
BaseEventBucket *bkt = nullptr;
EventBucketFind<TickEvent>(name, bkt);
EventBucket<TickEvent> *tBkt = reinterpret_cast<EventBucket<TickEvent> *>(bkt);
tBkt->callbacks.Push(handler);
}
template<>
void Event_UnregisterCallback<TickEvent>(const char *name, TickEvent handler) {
assert(handler != nullptr);
BaseEventBucket *bkt = nullptr;
EventBucketFind<TickEvent>(name, bkt);
EventBucket<TickEvent> *tBkt = reinterpret_cast<EventBucket<TickEvent> *>(bkt);
for (int64_t i = 0; i < tBkt->callbacks.Count(); ++i) {
if (tBkt->callbacks[i] == handler) {
tBkt->callbacks.Remove(i);
break;
}
}
}
template<>
void Event_Dispatch<TickEvent, double>(const char *name, double d) {
BaseEventBucket *bkt = nullptr;
EventBucketFind<TickEvent>(name, bkt);
EventBucket<TickEvent> *tBkt = reinterpret_cast<EventBucket<TickEvent> *>(bkt);
for (int64_t i = 0; i < tBkt->callbacks.Count(); ++i) {
tBkt->callbacks[i](d);
}
}
void Event_Teardown() {
tickBuckets.~DynArray();
eventBuckets.~DynArray();
}
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