#include "commands.h"
#include "lzr.h"
#include "cfg.h"
#include <SDL2/SDL_log.h>

int mouse_x, mouse_y, hovered = -1, editing = -1, hovered_instr = -1,
    was_down = 0;

static const unsigned int commands[COM_LEN] = {
	COM_RIGHT,
	COM_RIGHT,
	COM_UP,
	COM_DOWN,
	COM_LEFT,
	COM_NOOP,
	COM_LEFT,
	COM_DOWN,
	COM_UP
};

static unsigned int instructions[_COM_COUNT][2] = {
	{COM_LEFT, COM_NOOP},
	{COM_RIGHT, COM_NOOP},
	{COM_UP, COM_NOOP},
	{COM_DOWN, COM_NOOP},
	{COM_NOOP, COM_NOOP},
};

void commands_update(void)
{
	LZR_MousePosition(&mouse_x, &mouse_y);
	hovered = -1;
	hovered_instr = -1;
	const int y = (mouse_y - CFG_TSIZE / 2) / (int)(CFG_TSIZE * 1.5);
	const int press = LZR_BUTTON(MOUSE_L) && !was_down;
	if (mouse_x > CFG_TSIZE / 2 && mouse_x <= CFG_TSIZE * 2.5) {
		if (y < 0 || y >= COM_LEN)
			return;
		hovered = y;
		if (press)
			editing = commands[y];
	}
	if (editing != -1 && mouse_x > CFG_DWIDTH - CFG_TSIZE * 2.5) {
		if (y < 0 || y > 1)
			return;
		hovered_instr = y;
		if (press) {
			instructions[editing][hovered_instr] += 1;
			if (instructions[editing][hovered_instr] >= _COM_COUNT)
				instructions[editing][hovered_instr] = 0;
		}
	}
	was_down = LZR_BUTTON(MOUSE_L);
}

void commands_draw(void)
{
	for (int i = 0; i < COM_LEN; i++) {
		const int dx = CFG_TSIZE / 2;
		const int dy = CFG_TSIZE / 2 + i * (int)(CFG_TSIZE * 1.5);
		const int cmd = commands[i];
		const int blink = hovered == i || (LZR_GetTick() & 1);
		if (!blink)
			;
		else if (cmd == editing) {
			LZR_DrawSetColor(rand() & 1, rand() & 1, rand() & 1, 1);
			LZR_DrawImage(cmd, dx, dy);
		} else {
			LZR_DrawSetColor(1, 1, 1, 1);
			LZR_DrawImage(cmd, dx, dy);
		}
	}
	if (editing != -1) {
		const int dx = CFG_DWIDTH - CFG_TSIZE * 2.5;
		for (int i = 0; i < 2; i++) {
			const int dy = CFG_TSIZE / 2 + i * (int)(CFG_TSIZE * 1.5);
			const int instr = instructions[editing][i];
			const int blink = hovered_instr == i || (LZR_GetTick() & 1);
			if (!blink)
				continue;
			LZR_DrawSetColor(1, 1, 1, 1);
			LZR_DrawImage(instr, dx, dy);
		}
	}
}