#include <main.h>
#include <console.h>

struct cpu_state* syscall(struct cpu_state* cpu)
{
    switch (cpu->eax) {
        case 0: /* putc */
            kprintf("%c", cpu->ebx);
            break;
		case 1: /* clear_screen */
			clear_screen();
			break;
		case 2: /* set_color */
			color = cpu->ebx;
			break;
		case 3: /* getch() */
			cpu->ebx = keyboard_buffer;
			keyboard_buffer = 0;
			break;
		case 4: /* shutdown/reboot/(hibernate) */
			switch(cpu->ebx)
			{
				case 0: // shutdown
					kprintf("\nDo you realy want to shutdown the computer NOW? <y/N> N");
					wait_key();
					int c = wait_key();
					if(c == 'y' || c == 'Y')
					{
						shutdown();
					}
					break;
				case 1: // reboot
					kprintf("\nDo you realy want to reboot the computer NOW? <y/N> N");
					wait_key();
					c = wait_key();
					if(c == 'y' || c == 'Y')
					{
						outb(0x64, 0xFE);
					}
					break;
			}
			break;
		case 5: /* aktuelle cursorposition setzen */
			switch(cpu->edx)
			{
				case 0: /* absolute position */
					/* -1 = unverändert */
					if(cpu->ebx != -1)
						posX = cpu->ebx;
					if(cpu->ecx != -1)
						posY = cpu->ecx;
					break;
				case 1: /* x position relativ */
					/* 1 = ++, -1 = --; */
					posX += cpu->ebx;
					break;
				case 2: /* y position relativ */
					/* 1 = ++, -1 = --; */
					posY += cpu->ebx;
					break;
			}
			move_cursor(posX, posY);
			break;
		case 6: /* get_message(); */
			cpu->eax = current_task->message;
			cpu->ebx = current_task->msgparams;
			current_task->message = 0;
			current_task->msgparams = 0;
			break;
		case 7: /* get date */
			cpu->eax = system_time.tm_mday;
			cpu->ebx = system_time.tm_mon;
			cpu->ecx = system_time.tm_year;
			break;
		case 8: /* get time */
			cpu->eax = system_time.tm_hour;
			cpu->ebx = system_time.tm_min;
			cpu->ecx = system_time.tm_sec;
			break;
		case 9: /* putpixel() */
			putpixel(cpu->ebx, cpu->ecx, cpu->edx, cpu->esi);
			break;
		case 10: /* draw system content */
			draw_system_data();
			break;
		case 11: /* get video resolution */
			cpu->eax = lfb_width;
			cpu->ebx = lfb_height;
			cpu->ecx = lfb_depth;
			break;
		case 12: /* get char from serial port */
			cpu->eax = inb(0x3F8);
			break;
		case 13:
			cpu->eax = (int)kalloc(cpu->ebx);
			break;
    }
 
    return cpu;
}