// Copyright (c) 2012- PPSSPP Project.

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0 or later versions.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License 2.0 for more details.

// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/

// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.

#include "HLE.h"
#include "../MIPS/MIPS.h"
#include "StdMutex.h"
#include "sceCtrl.h"

/* Index for the two analog directions */
#define CTRL_ANALOG_X   0
#define CTRL_ANALOG_Y   1

#define CTRL_MODE_DIGITAL   0
#define CTRL_MODE_ANALOG    1


// Returned control data
struct _ctrl_data
{
	u32 frame;
	u32 buttons;
	u8  analog[2];
	u8  unused[6];
};

static u32 oldButtons;
struct CtrlLatch {
	u32 btnMake;
	u32 btnBreak;
	u32 btnPress;
	u32 btnRelease;
};



//////////////////////////////////////////////////////////////////////////
// STATE BEGIN
static bool ctrlInited = false;
static bool analogEnabled = false;

static _ctrl_data ctrl;
static CtrlLatch latch;

static std::recursive_mutex ctrlMutex;

// STATE END
//////////////////////////////////////////////////////////////////////////


void SampleControls() {
	static int frame = 0;
	_ctrl_data &data = ctrl;
	data.frame=1;//frame;
  frame++;
}


void UpdateLatch() {
	u32 changed = ctrl.buttons ^ oldButtons;
	latch.btnMake = ctrl.buttons & changed;
	latch.btnBreak = oldButtons & changed;
	latch.btnPress = ctrl.buttons;
	latch.btnRelease = (oldButtons & ~ctrl.buttons) & changed;
		
	oldButtons = ctrl.buttons;
}

// Functions so that the rest of the emulator can control what the sceCtrl interface should return
// to the game:

void __CtrlButtonDown(u32 buttonBit)
{
  std::lock_guard<std::recursive_mutex> guard(ctrlMutex);
  ctrl.buttons |= buttonBit;
}

void __CtrlButtonUp(u32 buttonBit)
{
  std::lock_guard<std::recursive_mutex> guard(ctrlMutex);
  ctrl.buttons &= ~buttonBit;
}

void __CtrlSetAnalog(float x, float y)
{
  std::lock_guard<std::recursive_mutex> guard(ctrlMutex);
  // TODO: Circle!
  if (x > 1.0f) x = 1.0f;
  if (y > 1.0f) y = 1.0f;
  if (x < -1.0f) x = -1.0f;
  if (y < -1.0f) y = -1.0f;
  ctrl.analog[0] = (u8)(x * 127.f + 128.f);
  ctrl.analog[1] = (u8)(y * 127.f + 128.f);
}

void sceCtrlInit()
{
	ctrlInited = true;
  memset(&ctrl, 0, sizeof(ctrl));
	ctrl.analog[0] = 128;
	ctrl.analog[1] = 128;
	DEBUG_LOG(HLE,"sceCtrlInit");	
	RETURN(0);
}

void sceCtrlSetSamplingCycle() {
	ERROR_LOG(HLE,"UNIMPL sceCtrlSetSamplingCycle");
	RETURN(0);
}

u32 sceCtrlSetSamplingMode(u32 mode)
{
	u32 retVal = 0;

	DEBUG_LOG(HLE,"sceCtrlSetSamplingMode(%i)", mode);
	_assert_msg_(HLE, mode >= 0 && mode <= 1, "sceCtrlSetSamplingMode: mode outside expected range.");

	if (ctrlInited)
	{
		retVal = analogEnabled == true ? CTRL_MODE_ANALOG : CTRL_MODE_DIGITAL;
		analogEnabled = mode == CTRL_MODE_ANALOG ? true : false;
	}
	return retVal;
}

void sceCtrlSetIdleCancelThreshold()
{
  DEBUG_LOG(HLE,"UNIMPL sceCtrlSetIdleCancelThreshold");
	RETURN(0);
}

u32 sceCtrlReadBufferPositive(u32 ctrlDataPtr, u32 nBufs)
{
	DEBUG_LOG(HLE,"sceCtrlReadBufferPositive(%08x, %i)", ctrlDataPtr, nBufs);
	_assert_msg_(HLE, nBufs > 0, "sceCtrlReadBufferPositive: trying to read nothing?");

	std::lock_guard<std::recursive_mutex> guard(ctrlMutex);
	// Let's just ignore if ctrl is inited or not; some games don't init it (Super Fruit Fall)
	//if (ctrlInited)
	//{
		SampleControls();
		memcpy(Memory::GetPointer(ctrlDataPtr), &ctrl, sizeof(_ctrl_data));
	//}
	return 1;
}

u32 sceCtrlPeekLatch(u32 latchDataPtr) {
	ERROR_LOG(HLE,"FAKE sceCtrlPeekLatch(%08x)", latchDataPtr);

	if (Memory::IsValidAddress(latchDataPtr))
		Memory::WriteStruct(latchDataPtr, &latch);
	return 1;
}

u32 sceCtrlReadLatch(u32 latchDataPtr) {
	ERROR_LOG(HLE,"FAKE sceCtrlReadLatch(%08x)", latchDataPtr);

	// Hackery to do it here.
	SampleControls();
	UpdateLatch();


	if (Memory::IsValidAddress(latchDataPtr))
		Memory::WriteStruct(latchDataPtr, &latch);

	return 1;
}

static const HLEFunction sceCtrl[] = 
{
  {0x6a2774f3, sceCtrlInit, "sceCtrlInit"}, //(int unknown), init with 0
  {0x1f4011e6, &WrapU_U<sceCtrlSetSamplingMode>, "sceCtrlSetSamplingMode"}, //(int on);
  {0x1f803938, &WrapU_UU<sceCtrlReadBufferPositive>, "sceCtrlReadBufferPositive"}, //(ctrl_data_t* paddata, int unknown) // unknown should be 1
  {0x6A2774F3, 0, "sceCtrlSetSamplingCycle"}, //?
  {0x6A2774F3,sceCtrlSetSamplingCycle,"sceCtrlSetSamplingCycle"},
  {0x02BAAD91,0,"sceCtrlGetSamplingCycle"},
  {0xDA6B76A1,0,"sceCtrlGetSamplingMode"},
  {0x3A622550,&WrapU_UU<sceCtrlReadBufferPositive>, "sceCtrlPeekBufferPositive"},
  {0xC152080A,0,"sceCtrlPeekBufferNegative"},
  {0x60B81F86,0,"sceCtrlReadBufferNegative"},
  {0xB1D0E5CD,&WrapU_U<sceCtrlPeekLatch>,"sceCtrlPeekLatch"},
  {0x0B588501,&WrapU_U<sceCtrlReadLatch>,"sceCtrlReadLatch"},
  {0x348D99D4,0,"sceCtrl_348D99D4"},
  {0xAF5960F3,0,"sceCtrl_AF5960F3"},
  {0xA68FD260,0,"sceCtrlClearRapidFire"},
  {0x6841BE1A,0,"sceCtrlSetRapidFire"},
  {0xa7144800,sceCtrlSetIdleCancelThreshold,"sceCtrlSetIdleCancelThreshold"},
  {0x687660fa,0,"sceCtrlGetIdleCancelThreshold"},
};	

void Register_sceCtrl() {
  RegisterModule("sceCtrl",ARRAY_SIZE(sceCtrl),sceCtrl);
}