#include <stdio.h>
#include <string.h>
#include "syscalls.c"
#include "../fs/fs.h"

void hello() {
    puts(
        "Welcome to FoolShell v0.1"
    );
}

void prompt() {
    printf(
        "$ "
    );
}

int main(int argc, char **argv) 
{
    syscalls_init();
    hello();

    FILE *input;
    input=fopen(1,"r");
    char *buf=malloc(256);

    while(1)
    {
	prompt();
        fgets(buf,255,input);
	buf[strlen(buf)-1]=0; // remove \n
	process(buf);
    }

    return 0;
}

char **tokenize(char *buf)
{
    
    char **token;
    token=malloc(10*sizeof(char*));

    int l=strlen(buf);

    int i;
    int c=0;

    for(i=0;i<l;i++)
    {  
	// init space for next token
	token[c]=malloc(256);

	//skip all the whitespace
	while(buf[i]==' '&&i<l)i++;
	if(i==l)break;

	//get token
	int t=0;

	while(buf[i]!=' '&&i<l)
	{
	    token[c][t]=buf[i];
	    t++;
	    i++;
	}
	token[c][t]=0;


//	printf("token %i : <%s>\n",c, token[c]);
	c++;

    }

    return token;

}

int process(char *buf)
{
    
    char **token=tokenize(buf);
    char *command=token[0];
  //  puts(command);
    // copied from trottelshell

    if(!strcmp(command,"HELP"))
    {
	puts("foolshell: supported built-in commands: HELP, ECHO, TIME, MEM, PROC, TASKS, ALLOC, LS, SYSCALL.");
    }
    else if(!strcmp(command,"TIME"))
    {
//	uint32_t time=task_system_clock;
//	log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"%d seconds passed since system start.",(time/25));
	puts("foolshell: TIME not supported now.");
    }
    else if(!strcmp(command,"MEM"))
    {
	//mmap_show_free();	
	puts("foolshell: MEM not supported now.");
    }
    else if(!strcmp(command,"PROC"))
    {
	/*
        for(int i=0;i<SMP_MAX_PROC;i++)
	{
	    if(cpu_counter[i]!=0)
		log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"cpu: %d => %d.",i,cpu_counter[i]);
	}
	*/
	puts("foolshell: PROC not supported now.");
    }
    else if(!strcmp(command,"TASKS"))
    {
	//log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"%d %d %d",c1,c2,c2);
	puts("foolshell: TASKS not supported now.");
    }
    else if(!strcmp(command,"ALLOC"))
    {
	/*
	uint32_t *malloc= pmmngr_alloc_block();
	log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"allocated 4KB block at: %08x.",malloc);
	*/
	puts("foolshell: ALLOC not supported now.");
    }
    else if(!strcmp(command,"SYSCALL"))
    {

	puts("system call 10");
	unsigned int ebx; // will hold return value;

	// system call 
	asm("pusha");
	asm("mov $10,%eax"); // select syscall 10 (example_syscall)
	asm("mov $666,%edx");
	asm("mov $333,%ecx");
	asm("int $0x80"); // actual syscall ! interrupt
        asm("mov %%ebx, %0": "=b" (ebx));
	asm("popa");
	//

	printf("system call returned %i\n",ebx);

    }
    else if(!strcmp(command,"LS"))
    {

	fs_dirent dirs[5];
	int  ls=readdir("/dupa",&dirs,5);
	int i;
	for(i=0;i<ls;i++)
	{
	    printf("%i %s%c\n",dirs[i].inode, dirs[i].name, ((dirs[i].type==2)?'/':' '));
	}

    }
    else if(!strcmp(command,"ECHO"))
    {

	printf("%s\n",token[1]);

    }
    else
    {
	puts("foolshell: command not found");
    }

    //
}