#include <main.h>
#include <console.h>
#include "drivers/vesa/vesa.h"

extern int mx, my, mz;
extern int buttons[5];

struct cpu_state *lf_api_handler(struct cpu_state *cpu)
{
	switch(HIWORD(cpu->eax))
	{
		case 0:
			switch(LOWORD(cpu->eax))
			{
				case 0:
					// Prozess beenden
					kill_task(current_task->pid, cpu);
					break;
				case 1:
					// Taskwechsel
					return schedule(cpu);
					break;
			}
			break;
		case 1:
			switch(LOWORD(cpu->eax))
			{
				case 0:
					cpu->ebx = (uint32_t)kalloc(cpu->ebx);
					break;
				case 1:
					// free()
					break;
			}
			break;
		case 2:
			switch(LOWORD(cpu->eax))
			{
				case 0:
					kprintf("%c", cpu->ebx);
					break;
				case 1:
					color = cpu->ebx;
					break;
			}
			break;
		case 3:
			switch(LOWORD(cpu->eax))
			{
				case 0:
					cpu->ebx = keyboard_buffer != 0 ? keyboard_buffer : 0xFF;
					break;
				case 1:
					// cpu->ebx = scancode
					break;
				case 2:
					cpu->ebx = mx;
					cpu->ecx = my;
					cpu->edx = mz;
					break;
				case 3:
					cpu->ebx = buttons[0];
					cpu->ecx = buttons[2];
					cpu->edx = buttons[1];
					break;
			}
		case 4:
			switch(LOWORD(cpu->eax))
			{
				case 0:
				{
					int r, g, b, a;
					r = (cpu->edx >> 24) & 0xFF;
					g = (cpu->edx >> 16) & 0xFF;
					b = (cpu->edx >> 8 ) & 0xFF;
					a = (cpu->edx >> 0 ) & 0xFF;
					
					if(a == 255)
						putpixel(cpu->ecx * lfb_width + cpu->ebx, r, g, b);
					else
						putpixelRGBA(cpu->ebx, cpu->ecx, r, g, b, a);
				}
				break;
				case 1:
					// resX = cpu->ebx
					// resY = cpu->ecx
					// resDepth = cpu->edx
					break;
				case 2:
					cpu->ebx = lfb_width;
					cpu->ecx = lfb_height;
					cpu->edx = lfb_depth;
					break;
				case 3:
					switch_buffer();
					break;
				case 4:
				{
					/* fill rectangle */
					int r, g, b, a;
					r = (cpu->edx >> 24) & 0xFF;
					g = (cpu->edx >> 16) & 0xFF;
					b = (cpu->edx >> 8 ) & 0xFF;
					a = (cpu->edx >> 0 ) & 0xFF;
					
					int x = HIWORD(cpu->ebx);
					int w = LOWORD(cpu->ebx);
					int y = HIWORD(cpu->ecx);
					int h = LOWORD(cpu->ecx);
					
					for(; y < y + h; y++)
					{
						for(; x < x + w; x++)
						{
							if(a == 255)
								putpixel(y * lfb_width + x, r, g, b);
							else
								putpixelRGBA(x, y, r, g, b, a);
						}
					}
				}
				break;
			}
	}
	
	return cpu;
}