#include <dolphin/pad.h>

#include <math.h>

typedef struct PADClampRegion {
	u8 minTrigger;
	u8 maxTrigger;
	s8 minStick;
	s8 maxStick;
	s8 xyStick;
	s8 minSubstick;
	s8 maxSubstick;
	s8 xySubstick;
} PADClampRegion;

static PADClampRegion ClampRegion = {
	// Triggers
	30,
	180,

	// Left stick
	15,
	72,
	40,

	// Right stick
	15,
	59,
	31,
};

static void ClampStick(s8 *px, s8 *py, s8 max, s8 xy, s8 min)
{
    int x = *px;
    int y = *py;
    int signX;
    int signY;
    int d;

    if (0 <= x) {
        signX = 1;
    }
    else {
        signX = -1;
        x = -x;
    }

    if (0 <= y) {
        signY = 1;
    }
    else {
        signY = -1;
        y = -y;
    }

    if (x <= min) {
        x = 0;
    }
    else {
        x -= min;
    }
    if (y <= min) {
        y = 0;
    }
    else {
        y -= min;
    }

    if (x == 0 && y == 0) {
        *px = *py = 0;
        return;
    }

    if (xy * y <= xy * x) {
        d = xy * x + (max - xy) * y;
        if (xy * max < d) {
            x = (s8)(xy * max * x / d);
            y = (s8)(xy * max * y / d);
        }
    }
    else {
        d = xy * y + (max - xy) * x;
        if (xy * max < d) {
            x = (s8)(xy * max * x / d);
            y = (s8)(xy * max * y / d);
        }
    }

    *px = (s8)(signX * x);
    *py = (s8)(signY * y);
}

static void ClampTrigger(u8 *trigger, u8 min, u8 max)
{
    if (*trigger <= min) {
        *trigger = 0;
    }
    else {
        if (max < *trigger) {
            *trigger = max;
        }
        *trigger -= min;
    }
}

void PADClamp(PADStatus *status)
{
	// int i;
	// for (i = 0; i < PAD_CHANMAX; i++, status++) {
	// 	if (status->err != PAD_ERR_NONE) {
	// 		continue;
	// 	}

	// 	ClampStick(&status->stickX, &status->stickY, ClampRegion.maxStick, ClampRegion.xyStick, ClampRegion.minStick);
	// 	ClampStick(&status->substickX, &status->substickY, ClampRegion.maxSubstick, ClampRegion.xySubstick, ClampRegion.minSubstick);
	// 	ClampTrigger(&status->triggerL, ClampRegion.minTrigger, ClampRegion.maxTrigger);
	// 	ClampTrigger(&status->triggerR, ClampRegion.minTrigger, ClampRegion.maxTrigger);
	// }
}