#include <stdio.h>
#include <string.h>
#ifndef _MSC_VER
#   include <unistd.h>
#endif
#include <stdlib.h>
#include "AllUrho.h"
#include "glue.h"
#include "interop.h"
using namespace Urho3D;

//
// This is just an implemention of EventHandler that can be used with function
// pointers, so we can register delegates from C#
//

extern "C" {

	DllExport
	void * urho_map_get_ptr (VariantMap &map, int hash)
	{
		StringHash h (hash);
		return map [h].GetVoidPtr ();
	}

	DllExport
	void * urho_map_get_object(VariantMap &map, int hash, int* objHash)
	{
		StringHash h(hash);
		void* ptr = map[h].GetVoidPtr();
		Object * object = static_cast<Object *>(ptr);
		*objHash = object->GetType().Value(); //GetType is virtual
		return ptr;
	}

	DllExport
	const char * urho_map_get_String (VariantMap& map, int hash)
	{
		StringHash h (hash);
		return stringdup(map [h].GetString ().CString());
	}
	
	DllExport
	int urho_map_get_StringHash (VariantMap& map, int hash)
	{
		StringHash h (hash);
		return map [h].GetStringHash ().Value ();
	}
	
	DllExport
	Variant urho_map_get_Variant (VariantMap& map, int hash)
	{
		StringHash h (hash);
		return map [h];
	}
	
	DllExport
	Vector3 urho_map_get_Vector3 (VariantMap& map, int hash)
	{
		StringHash h (hash);
		return map [h].GetVector3 ();
	}

	DllExport
	int urho_map_get_bool (VariantMap& map, int hash)
	{
		StringHash h (hash);
		return map [h].GetBool ();
	}
	
	DllExport
	float urho_map_get_float (VariantMap& map, int hash)
	{
		StringHash h (hash);
		return map [h].GetFloat ();
	}
		
	DllExport
	int urho_map_get_int (VariantMap& map, int hash)
	{
		StringHash h (hash);
		return map [h].GetInt ();
	}
	
	DllExport
	unsigned int urho_map_get_uint (VariantMap& map, int hash)
	{
		StringHash h (hash);
		return map [h].GetUInt ();
	}

	DllExport unsigned char *
	urho_map_get_buffer (VariantMap &map, int hash, unsigned *size)
	{
		StringHash h (hash);
		PODVector<unsigned char> p (map [h].GetBuffer ());
		*size = p.Size();
		unsigned char * result = new unsigned char[p.Size()];
		for (int i = 0; i < p.Size(); i++) {
			result[i] = p[i];
		}
		return result;
	}

	DllExport
	void urho_unsubscribe (NotificationProxy *proxy)
	{
		proxy->Unsub ();
	}

	DllExport void
	UI_LoadLayoutToElement(Urho3D::UI *_target, Urho3D::UIElement *to, Urho3D::ResourceCache *cache, const char * name)
	{		
		SharedPtr<UIElement> layoutRoot = _target->LoadLayout(cache->GetResource<XMLFile>(name));
		to->AddChild(layoutRoot);
	}

	DllExport int
	Scene_LoadXMLFromCache(Urho3D::Scene *_target, Urho3D::ResourceCache *cache, const char * name)
	{
		SharedPtr<File> file = cache->GetFile(name);
		return _target->LoadXML(*file);
	}
	
	DllExport
	void *TouchState_GetTouchedElement (TouchState *state)
	{
		return (void *) state->GetTouchedElement ();
	}

	DllExport
	const char *Urho_GetPlatform ()
	{
		return stringdup (GetPlatform().CString ());
	}

	DllExport
	unsigned urho_stringhash_from_string (const char *p)
	{
		StringHash foo (p);
		return foo.Value ();
	}
	
	DllExport
	Skeleton *AnimatedModel_GetSkeleton (AnimatedModel *model)
	{
		return &model->GetSkeleton ();
	}

	DllExport
	unsigned Controls_GetButtons (Controls *controls)
	{
		return controls->buttons_;
	}

	DllExport
	void* Graphics_GetSdlWindow(Graphics* target)
	{
		return target->GetWindow();
	}

	DllExport
	void Controls_SetButtons (Controls *controls, unsigned value)
	{
		controls->buttons_ = value;
	}
	
	DllExport
	float Controls_GetYaw (Controls *controls)
	{
		return controls->yaw_;
	}

	DllExport
	void Controls_SetYaw (Controls *controls, float value)
	{
		controls->yaw_ = value;
	}

	DllExport
	float Controls_GetPitch (Controls *controls)
	{
		return controls->pitch_;
	}

	DllExport
	void Controls_SetPitch (Controls *controls, float value)
	{
		controls->pitch_ = value;
	}

	DllExport void
	Controls_Reset (Urho3D::Controls *_target)
	{
		_target->Reset ();
	}
	
	DllExport void
	Controls_Set (Urho3D::Controls *_target, unsigned int buttons, int down)
	{
		_target->Set (buttons, down);
	}
	
	DllExport int
	Controls_IsDown (Urho3D::Controls *_target, unsigned int button)
	{
		return _target->IsDown (button);
	}
	
#if !defined(UWP)
	DllExport int 
	Network_Connect(Network *net, const char *ptr, short port, Scene *scene)
	{
		String s(ptr);
		return net->Connect(s, port, scene) ? 1 : 0;
	}

	DllExport const Controls *
	Connection_GetControls (Connection *conn)
	{
		return &conn->GetControls ();
	}
	DllExport void
	Connection_SetControls(Connection *conn, Controls *ctl)
	{
		conn->SetControls(*ctl);
	}
#endif

	DllExport Controls *
	Controls_Create ()
	{
		return new Controls ();
	}

	DllExport void
	Controls_Destroy (Controls *controls)
	{
		delete controls;
	}

	DllExport RayQueryResult *
	Octree_Raycast(Octree *octree, const Urho3D::Ray & ray, const Urho3D::RayQueryLevel & level, float maxDistance, unsigned int flags, unsigned int viewMask, bool single, int *count) {
		PODVector<RayQueryResult> results;
		auto size = sizeof(RayQueryResult);
		RayOctreeQuery query(results, ray, level, maxDistance, flags, viewMask);
		if (single)
			octree->RaycastSingle(query);
		else
			octree->Raycast(query);

		if (results.Size() == 0)
			return NULL;

		RayQueryResult * result = new RayQueryResult[results.Size()];
		*count = results.Size();
		for (int i = 0; i < results.Size(); i++) {
			result[i] = results[i];
		}
		return result;
	}

	DllExport void 
	Console_OpenConsoleWindow()
	{
		OpenConsoleWindow();
	}

	DllExport const char * 
	Console_GetConsoleInput()
	{
		return stringdup(GetConsoleInput().CString());
	}

	//
	// returns: null on no matches
	// otherwise, a pointer that should be released with free() that
	// contains a first element (pointer sized) with the number of elements
	// followed by the number of pointers
	//
	DllExport
	void *urho_node_get_components (Node *node, int code, int recursive, int *count)
	{
		PODVector<Node*> dest;
		node->GetChildrenWithComponent (dest, StringHash(code), recursive);
		if (dest.Size () == 0)
			return NULL;
		*count = dest.Size ();
		void **t = (void **) malloc (sizeof(Node*)*dest.Size());
		for (int i = 0; i < dest.Size (); i++){
			t [i] = dest [i];
		}
		return t;
	}

	DllExport Interop::Vector3 *
	urho_navigationmesh_findpath(NavigationMesh * navMesh, const class Urho3D::Vector3 & start, const class Urho3D::Vector3 & end, int *count)
	{
		PODVector<Vector3> dest;
		navMesh->FindPath(dest, start, end);
		if (dest.Size() == 0)
			return NULL;
		*count = dest.Size();
		Interop::Vector3 * results = new Interop::Vector3[dest.Size()];
		for (int i = 0; i < dest.Size(); i++) {
			auto vector = *((Interop::Vector3  *) &(dest[i]));
			results[i] = vector;
		}
		return results;
	}
	
	DllExport MemoryBuffer* MemoryBuffer_MemoryBuffer(void* data, int size)
	{
		auto buffer = new MemoryBuffer(data, size);
		return buffer;
	}

	DllExport unsigned char* MemoryBuffer_GetData(MemoryBuffer* target, int *count)
	{
		*count = target->GetSize();
		return target->GetData();
	}

	DllExport void MemoryBuffer_Dispose(MemoryBuffer* target)
	{
		delete target;
	}
}